WO2021187254A1 - 推定装置、推定方法及びプログラム - Google Patents
推定装置、推定方法及びプログラム Download PDFInfo
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- WO2021187254A1 WO2021187254A1 PCT/JP2021/009384 JP2021009384W WO2021187254A1 WO 2021187254 A1 WO2021187254 A1 WO 2021187254A1 JP 2021009384 W JP2021009384 W JP 2021009384W WO 2021187254 A1 WO2021187254 A1 WO 2021187254A1
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- detection signal
- magnet
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/24457—Failure detection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
Definitions
- the present invention relates to an estimation device, an estimation method and a program.
- the above technique is a technique for estimating the position of a rotating body (rotor of a motor, etc.), and does not include a function for estimating the degree of change in the sensitivity of position detection. If the state of the sensor and the rotating body and the degree of sensitivity can be estimated, it is expected that the maintenance cost and the stop time will be shortened. Therefore, it is required to estimate the degree of change in the sensitivity of position detection without providing an additional dedicated sensor for estimating the degree of change.
- the present invention can estimate the degree of change in position detection sensitivity without providing an additional dedicated sensor for estimating the degree of change in position detection sensitivity. It is intended to provide equipment, estimation methods and programs.
- One aspect of the present invention is an estimation device that estimates the state of the device that detects the position of the rotating body, and detects the position of the magnet according to the magnetic flux of the magnet that can rotate in conjunction with the rotating body.
- a position sensor that outputs a detection signal, which is a signal to be represented, an extraction unit that extracts a feature amount of the detection signal from the detection signal for each position, a feature amount of the detection signal for each position, and a reference for each position.
- It is an estimation device including an estimation unit that derives an evaluation value representing a comparison result with a value and estimates the degree of change in sensitivity for detecting the position based on the evaluation value.
- the present invention is capable of estimating the degree of change in position detection sensitivity without providing an additional dedicated sensor for estimating the degree of change in position detection sensitivity. It is intended to provide estimation methods and programs.
- FIG. 1 is a diagram showing a configuration example of a sensor unit according to the first embodiment.
- FIG. 2 is a diagram showing an example of the correspondence between the pole pair number, the section, and the segment in the first embodiment.
- FIG. 3 is a diagram showing a configuration example of the position sensor in the first embodiment.
- FIG. 4 is a diagram showing an example of sample points of the detection signal in the first embodiment.
- FIG. 5 is a diagram showing an example in the first embodiment in which the feature amounts of the detection signals of all the phases change in one cycle of the electric angle.
- FIG. 6 is a diagram showing an example in the first embodiment when the feature amount of the detection signal of a specific phase changes in one cycle of the mechanical angle.
- FIG. 7 is a diagram showing an example in the first embodiment in which the feature amounts of the detection signals of all the phases change in one cycle of the mechanical angle.
- FIG. 8 is a flowchart showing an operation example of the sensor unit in the first embodiment.
- FIG. 9 is a diagram showing an example of a detection signal in a modified example of the first embodiment.
- FIG. 10 is a diagram showing a configuration example of the position sensor in the second embodiment.
- FIG. 11 is a diagram showing a configuration example of the sensor unit in the third embodiment.
- FIG. 12 is a diagram showing a configuration example of the position sensor in the third embodiment.
- FIG. 13 is a diagram showing a configuration example of the sensor unit according to the fourth embodiment.
- FIG. 1 is a diagram showing a configuration example of the sensor unit 1a in the first embodiment.
- the sensor unit 1a includes a magnet 2 and an estimation device 3a.
- the magnet 2 is a magnet for a position sensor that detects the position of a rotating object such as a rotor. In the following, the number of pole pairs of the magnet 2 is 4 as an example.
- the estimation device 3a includes a position sensor device 30 and a determination device 31.
- the position sensor device 30 includes M (M is an integer of 3 or more) magnetic sensors 300 and an extraction unit 301. In the first embodiment, "M" is 3 as an example.
- the position sensor device 30 includes M magnetic sensors 300 as position sensors 302.
- the determination device 31 includes a control unit 310, a storage unit 311, an estimation unit 312, and an output unit 313.
- the sensor unit 1a includes a magnet 2 and a position sensor device 30 as a device for detecting the position of the rotating body.
- FIG. 2 is a diagram showing an example of the correspondence between the pole pair number, the section, and the segment.
- a section number group is associated with the pole pair number.
- the number of section numbers is equal to the number of 12 different logics including the magnitude relation of the detection signals output from the M magnetic sensors 300 and the positive / negative (zero cross) of the intermediate signal.
- the pole pair number "0” is associated with a section number from “0" to "11".
- the segment number is a unique number representing the absolute value of the mechanical angle of the magnet 2.
- the section numbers "0" to “11” of the pole pair number "0” are associated with the segment numbers "0" to "11”.
- the section numbers "0" to "11” of the pole pair number "1” are associated with the segment numbers "12" to "23”.
- the data table showing the correspondence shown in FIG. 2 is stored in advance in, for example, the storage unit 311.
- FIG. 3 is a diagram showing a configuration example of the position sensor 302 in the first embodiment.
- the upper part of FIG. 3 represents the upper surface of the position sensor 302.
- the lower part of FIG. 3 shows the side surface of the position sensor 302.
- the M magnetic sensors 300 are provided on the substrate 100 whose position is fixed.
- Rotor 201 is a rotating object. This rotating object is, for example, a rotating mechanism and is not limited to a motor.
- the rotor 201 includes a spindle 200.
- a magnet 2 is connected to the spindle 200. As the rotor 201 rotates, the spindle 200 rotates.
- the magnet 2 is rotatable in conjunction with the rotor 201 and the spindle 200.
- Each magnetic sensor 300 outputs a detection signal, which is a signal representing the detection result (magnetic flux component of the pole pair) of the position of the magnet 2, to the extraction unit 301.
- the magnetic sensor 300-1 outputs a U-phase detection signal representing the position of the magnet 2 to the extraction unit 301.
- the magnetic sensor 300-2 outputs a V-phase detection signal representing the position of the magnet 2 to the extraction unit 301.
- the magnetic sensor 300-3 outputs a W-phase detection signal representing the position of the magnet 2 to the extraction unit 301.
- the extraction unit 301 reduces in-phase noise in each detection signal.
- the extraction unit 301 extracts the feature amount of the detection signal from each detection signal for each position of the magnet 2.
- the extraction unit 301 outputs the feature amount (array data) of the detection signal for each position to the estimation unit 312 and the control unit 310.
- FIG. 4 is a diagram showing an example of sample points of the detection signal in the first embodiment.
- the horizontal axis represents the rotor angle (position of the magnet 2).
- the vertical axis represents the digital value of the detection signal.
- “HU” represents a U-phase detection signal.
- “HV” represents a V-phase detection signal.
- “HW” represents a W phase detection signal.
- sample points 401 to 424 are shown as an example of sample points representing n features (n is an integer of 1 or more) extracted from the detection signal.
- Sample point 401, sample point 405, sample point 409, sample point 415, sample point 419, and sample point 423 are intersections of waveforms of detection signals, respectively.
- the sample point 402, the sample point 404, the sample point 406, the sample point 408, the sample point 410, and the sample point 412 are each detected when the digital value of the detection signal is 0 (zero cross). It is a point that represents the feature amount of the signal.
- the sample point 402 indicates the digital value of the detection signal “HU” when the digital value of the detection signal “HW” is 0.
- Sample point 414, sample point 416, sample point 418, sample point 420, sample point 422, and sample point 424 are each other detection when the digital value of the detection signal is 0 (zero cross). It is a point that represents the feature amount of the signal.
- the sample point 403, the sample point 407, and the sample point 411 are the maximum digital values of the detection signals, respectively.
- the sample points 413, the sample points 417, and the sample points 421 are the minimum digital values of the detection signals, respectively.
- the control unit 310 controls the operation of the storage unit 311. For example, the control unit 310 records the feature amount of the detection signal in the storage unit 311 for each sample point.
- the storage unit 311 stores the feature amount (digital value) of the detection signal as the feature amount of the detection signal for each position for each sample point. Since there are not many sample points, the storage capacity of the storage unit 311 may be small.
- the storage unit 311 stores the reference value for each position in advance.
- the reference value is, for example, a feature amount of the detection signal measured at a past time point.
- the past time point is, for example, a time point when the magnet 2 and the position sensor device 30 are attached or a time point at the time of shipment.
- the reference value may be updated regularly.
- the feature amount of the detection signal is input to the estimation unit 312 for each position (sample point).
- the estimation unit 312 derives an evaluation value representing a comparison result between the feature amount of the detection signal for each position and the reference value for each position.
- the evaluation value is expressed using a mean square error as in the equation (1), for example.
- ri represents a reference value (reference feature amount).
- Di represents a feature amount (measured value) of the detection signal.
- N represents the number of samples included in a predetermined evaluation unit.
- the evaluation unit is, for example, one cycle of the mechanical angle or one cycle of the electric angle. If evaluation is performed in each unit (phase unit) of the detection signal "Hu”, the detection signal “Hv”, and the detection signal “Hw”, the reference value and the current value are the phase units for the maximum value and the minimum value of each phase. By comparing with, the change in the phase unit can be detected based on the evaluation value in the phase unit.
- the estimation unit 312 estimates the degree of change in the sensitivity for detecting the position based on the evaluation value. For example, the estimation unit 312 compares a predetermined threshold value with the evaluation value. When the evaluation value is equal to or higher than the threshold value, the estimation unit 312 may determine that the sensitivity for detecting the position has changed.
- FIG. 5 is a diagram showing an example in the first embodiment in which the feature amounts of the detection signals of all the phases change in one cycle of the electric angle.
- the horizontal axis represents four cycles of the electric angle (position of the magnet 2).
- the four cycles of the electric angle correspond to one cycle of the mechanical angle of the magnet 2.
- the vertical axis represents the digital value of the detection signal.
- the estimation unit 312 determines the electric angle. It is determined that the magnetic flux of the pole pair of the magnets associated with one cycle has changed. For example, when the evaluation value as in the equation (1) is equal to or greater than the threshold value, the estimation unit 312 may determine that the magnetic flux of the pole pair associated with one cycle of the electric angle has changed. In FIG. 5, the estimation unit 312 determines that the magnetic flux of the pair of poles associated with the electric angles “2 ⁇ ” to “4 ⁇ ” has changed.
- FIG. 6 is a diagram showing an example in the first embodiment when the feature amount of the detection signal of a specific phase changes in one cycle of the mechanical angle.
- the horizontal axis represents four cycles of the electric angle (position of the magnet 2).
- the vertical axis represents the digital value of the detection signal.
- the feature amount of the detection signal of the magnetic sensor 300 of the detection signal “HU” changes with respect to the reference value for each position in one cycle of the machine angle.
- the reasons for this are the possibility that the distance between the magnetic sensor 300 that outputs the detection signal "HU” and the magnet 2 has changed, and the possibility that the sensitivity of the magnetic sensor 300 that outputs the detection signal "HU” has changed. be.
- the estimation unit 312 determines the detection signal “ It is determined that the distance between the magnetic sensor 300 that outputs "HU” and the magnet 2 has changed.
- the estimation unit 312 may determine that the sensitivity of the magnetic sensor 300 that outputs the detection signal “HU” has changed.
- FIG. 7 is a diagram showing an example in the first embodiment in which the feature amounts of the detection signals of all the phases change in one cycle of the mechanical angle.
- the horizontal axis represents four cycles of the electric angle (position of the magnet 2).
- the vertical axis represents the digital value of the detection signal.
- the feature amounts of the detection signals of all the magnetic sensors 300 change with respect to the reference value for each position in one cycle of the mechanical angle.
- the predetermined distance is, for example, a design distance between the magnet 2 and the magnetic sensor 300.
- the estimation unit 312 evaluates that the feature quantities of the detection signals "HU”, “HV”, and “HW” of all the magnetic sensors 300 have changed with respect to the reference value for each position in one cycle of the mechanical angle. When it is represented, it is determined that the magnetic fluxes of all the pole pairs of the magnet 2 have changed. The estimation unit 312 may determine that the distance between the magnet 2 and all the magnetic sensors 300 has changed. The estimation unit 312 may determine that the sensitivities of all the magnetic sensors have changed.
- the output unit 313 outputs the degree of change in the sensitivity for detecting the position to an external device (not shown).
- the output unit 313 may output the comparison result between the degree of change in the sensitivity for detecting the position and the threshold value to a predetermined external device. For example, when the degree of change is equal to or greater than the threshold value, the output unit 313 may output a warning message to an external device (not shown) regarding the change in the sensitivity for detecting the position.
- FIG. 8 is a flowchart showing an operation example of the sensor unit 1a in the first embodiment.
- Each magnetic sensor 300 outputs a detection signal for each position of the magnet 2 to the extraction unit 301 (step S101).
- the extraction unit 301 extracts the feature amount of the detection signal from the detection signal for each position of the magnet 2 (step S102).
- the estimation unit 312 derives the evaluation value.
- the evaluation value represents a comparison result between the feature amount of the detection signal for each position of the magnet 2 and the reference value for each position of the magnet 2 (step S103).
- the estimation unit 312 estimates the degree of change in the sensitivity for detecting the position of the magnet 2 based on the evaluation value (step S104).
- the output unit 313 outputs the degree of change in the sensitivity for detecting the position to a predetermined external device (not shown) (step S105).
- the estimation device 3a is a device that estimates the state of the position sensor device 30 as a device for detecting the position of the rotor 201 (rotating body).
- the estimation device 3a may estimate the state of the magnet 2 (for example, deterioration of magnetic flux).
- the position sensor 302 outputs a detection signal, which is a signal indicating a detection result of the position of the magnet 2, to the extraction unit 301 according to the magnetic flux of the magnet 2 that can rotate in conjunction with the rotor 201 (rotating body).
- the extraction unit 301 extracts the feature amount of the detection signal from the detection signal for each position of the magnet 2.
- the estimation unit 312 derives an evaluation value representing a comparison result between the feature amount of the detection signal for each position of the magnet 2 and the reference value for each position of the magnet 2.
- the estimation unit 312 estimates the degree of change (for example, deterioration) in the sensitivity (for example, sensitivity) for detecting the position of the magnet 2 based on the evaluation value.
- the estimation unit 312 derives an evaluation value representing a comparison result between the feature amount of the detection signal for each position of the magnet 2 and the reference value for each position of the magnet 2.
- the estimation unit 312 derives an evaluation value representing a comparison result between the feature amount of the detection signal for each position of the magnet 2 and the reference value for each position of the magnet 2.
- FIG. 9 is a diagram showing an example of a detection signal in the modified example of the first embodiment.
- the extraction unit 301 may use the digital value of each detection signal corrected for in-phase noise as it is as a feature amount of the detection signal as follows.
- the storage unit 311 stores array data of each detection signal, such as the U-phase detection signal U [i], the V-phase detection signal W [i], and the W-phase detection signal W [i].
- "i” represents a sample number (1 to s).
- “S” represents the number of samples in one cycle of the mechanical angle. Since the number of sample points increases, the storage capacity of the storage unit 311 may be increased.
- the second embodiment is different from the first embodiment in that the position sensor 302 is provided in the housing of the motor. In the second embodiment, the differences from the first embodiment will be mainly described.
- FIG. 10 is a diagram showing a configuration example of the position sensor 302 in the second embodiment.
- the upper part of FIG. 10 represents the upper surface of the position sensor 302.
- the lower part of FIG. 10 shows the side surface of the position sensor 302.
- the M magnetic sensors 300 are provided on the substrate 100 whose position is fixed.
- "M" is 3 as an example.
- the stator 202 is an electromagnet having a U-phase coil, a V-phase coil, and a W-phase coil. A magnetic flux is generated in the stator 202 by the current flowing in each phase coil according to the command value.
- the rotor 203 is a magnet.
- the stator 202 and rotor 203 form a motor.
- the rotor 203 includes a spindle 200.
- a magnet 2 is connected to the spindle 200. As the rotor 203 rotates, the spindle 200 rotates.
- the magnet 2 is rotatable in conjunction with the rotor 203 and the spindle 200.
- the spindle 200 is arranged so as to pass through the substrate 100. That is, the position sensor 302 does not come into contact with the spindle 200 and is fixed to the housing 400 to which the stator 202 is fixed.
- the magnet 2 connected to the spindle 200 may be provided outside the housing 400.
- the position sensor 302 is provided between the magnet 2 and the housing 400.
- M magnetic sensors 300 are provided on the surface of the substrate 100 of the position sensor 302 on the side close to the magnet 2.
- the position sensor 302 does not come into contact with the spindle 200 and is fixed to the housing to which the stator 202 is fixed.
- the position sensor 302 outputs a detection signal, which is a signal representing the detection result of the position of the magnet 2, to the extraction unit 301.
- the estimation unit 312 derives an evaluation value representing a comparison result between the feature amount of the detection signal for each position of the magnet 2 and the reference value for each position of the magnet 2. This makes it possible to estimate the degree of change in position detection sensitivity without having to equip the motor with an additional dedicated sensor to estimate the degree of change in position detection sensitivity.
- the third embodiment differs from the first and second embodiments in that the rotor (magnet) of the motor is used as a magnet for the position sensor.
- the differences from the first embodiment and the second embodiment will be mainly described.
- FIG. 11 is a diagram showing a configuration example of the sensor unit 1b in the third embodiment.
- the sensor unit 1b includes an estimation device 3b and a control device 4.
- the estimation device 3b includes a position sensor device 30 and a determination device 31.
- the position sensor device 30 includes M magnetic sensors 300 and an extraction unit 301.
- the position sensor device 30 includes M magnetic sensors 300 as position sensors 302. In the third embodiment, "M" is 6 as an example.
- the determination device 31 includes a control unit 310, a storage unit 311, an estimation unit 312, and an output unit 313.
- FIG. 12 is a diagram showing a configuration example of the position sensor 302 in the third embodiment.
- the upper part of FIG. 12 represents the upper surface of the position sensor 302.
- the lower part of FIG. 12 shows the side surface of the position sensor 302.
- the stator 202 is an electromagnet having a U-phase coil, a V-phase coil, and a W-phase coil. A magnetic flux is generated in the stator 202 by the current flowing in each phase coil according to the command value.
- the rotor 203 is a magnet.
- the stator 202 and rotor 203 form a motor.
- the rotor 203 includes a spindle 200. The rotation of the rotor 203 (magnet) causes the spindle 200 to rotate.
- the spindle 200 is arranged so as to pass through the substrate 100. That is, the position sensor 302 does not come into contact with the spindle 200 and is fixed to the housing 400 to which the stator 202 is fixed.
- the rotor 203 is used as a magnet for a position sensor that detects the position of the rotor 203 instead of the magnet 2.
- the control device 4 applies to the stator 202 (electromagnet) based on command values such as rotation speed and torque value and position information (angle information) of the rotor 203 (magnet) obtained from the position sensor device 30. Determine the current value to be.
- the control device 4 generates a magnetic field by passing a current through the stator 202 (electromagnet) based on the determined current value, and controls the drive of the rotor 203.
- the M magnetic sensors 300 are provided on the substrate 100 whose position is fixed.
- "M" is 6 as an example.
- the magnetic sensors 300-1 to 300-3 (plurality of first magnetic sensors) are provided in the vicinity of the magnets constituting the rotor 203.
- the magnetic sensors 300-4 to 300-6 (plurality of second magnetic sensors) are located closer to the stator 202 than the distance between the magnetic sensors 300-1 to 300-3 and the spindle 200. Be prepared for.
- the magnetic sensor 300-4, the magnetic sensor 300-1, and the spindle 200 are aligned on a straight line.
- the magnetic sensor 300-5, the magnetic sensor 300-2, and the spindle 200 are aligned on a straight line.
- the magnetic sensor 300-6, the magnetic sensor 300-3, and the spindle 200 are aligned on a straight line.
- the magnetic sensors 300-1 to 300-3 detect the magnetic flux from both the rotor 203 (magnet) and the stator 202 (electromagnet), and output the detection signal to the extraction unit 301.
- the detection signal output from any of the magnetic sensors 300-1 to 300-3 is represented by the equation (2).
- the magnetic sensors 300-4 to 300-6 also detect the magnetic flux from both the rotor 203 (magnet) and the stator 202 (electromagnet), and output the detection signal to the extraction unit 301.
- the detection result of the magnetic flux component output from any of the magnetic sensors 300-4 to 300-6 is expressed by the equation (3).
- VHA represents a detection signal (magnetic flux component amount) output from any of the magnetic sensors 300-1 to 300-3.
- VHB represents a detection result (detection result of magnetic flux component) output from any one of the magnetic sensors 300-4 to 300-6.
- ⁇ s ( ⁇ , I) represents the magnetic flux component (leakage magnetic flux component) of the stator 202.
- ⁇ m ( ⁇ ) represents the magnetic flux component of the rotor 203.
- ⁇ represents the electrical angle of the rotor 203.
- I represents the value of the current flowing through the coil of the stator 202.
- the coefficients "x”, "y”, “j”, and “k” are coefficients that depend on the structure of the motor and the arrangement of the magnetic sensors, and are determined based on, for example, the results of an experiment or simulation.
- “X” is a coefficient in the magnetic flux term of the rotor 203, and is, for example, a coefficient corresponding to each distance between the magnetic sensors 300-1 to 300-3 and the rotor 203.
- “Y” is a coefficient in the magnetic flux term of the stator 202, and is, for example, a coefficient corresponding to each distance between the magnetic sensors 300-4 to 300-6 and the rotor 203.
- J is a coefficient in the magnetic flux term of the stator 202, for example, a coefficient corresponding to each distance between the magnetic sensors 300-1 to 300-3 and the stator 202.
- K is a coefficient in the magnetic flux term of the stator 202, and is, for example, a coefficient corresponding to each distance between the magnetic sensors 300-4 to 300-6 and the stator 202.
- the extraction unit 301 uses the detection result of the magnetic flux component of the stator 202 to output a signal representing the detection result of the magnetic flux component of only the stator 202 from each of the detections 300-1 to 300-6. Extract from the signal.
- the detection result (correction value) of the magnetic flux component of only the stator 202 is expressed as shown on the right side of the equation (4).
- the extraction unit 301 has a stator 202 based on the detection signal “VHA” output from the magnetic sensor 300-1 and the detection signal (magnetic flux component amount) “VHB” output from the magnetic sensor 300-4.
- the detection result of the magnetic flux component of only is derived as shown on the right side of the equation (4).
- the extraction unit 301 acquires the command value of the amount of current flowing through the stator 202 from the control device 4.
- the extraction unit 301 derives an estimated value of the magnetic flux component of only the stator 202 based on the command value of the amount of current flowing through the stator 202.
- the estimation unit 312 can estimate the state of the stator 202 by comparing the estimated value of the magnetic flux component of the stator 202 only with the detection result of the magnetic flux component of the stator 202 only.
- the magnetic flux component of the stator 202 is measured at the time of assembly or factory shipment, and is stored in the storage unit 311 in advance.
- the estimation unit 312 can also estimate the state of the stator 202 by comparing the magnetic flux component of the stator 202 stored in advance in the storage unit 311 with the detected magnetic flux component.
- the estimation device 3b is a device that estimates the state of the position sensor device 30 and the state of the stator 202 as a device for detecting the position of the rotor 203 (rotor).
- the estimation device 3b may estimate the state of the rotor 203 (for example, deterioration of the magnetic flux).
- the estimation unit 312 estimates the degree of change in the stator 202 based on the difference between the estimated value of the magnetic flux component of the stator 202 based on the current flowing through the stator 202 and the detection result of the magnetic flux component of the stator 202 only. do. Thereby, it is possible to improve the sensitivity for estimating the degree of change in the sensitivity of position detection without providing an additional dedicated sensor for estimating the degree of change in the sensitivity of position detection.
- the point that the sensor unit includes a plurality of position sensor devices and a single determination device is a point from the first embodiment to the third embodiment. It is different from the form. In the fourth embodiment, the differences from the first embodiment to the third embodiment will be mainly described.
- FIG. 13 is a diagram showing a configuration example of the sensor unit 1c in the fourth embodiment.
- the sensor unit 1c includes P (P is an integer of 2 or more) magnets 2 and an estimation device 3c.
- the estimation device 3c includes P position sensor devices 30 and a determination device 31.
- the position sensor device 30 includes M magnetic sensors 300 and an extraction unit 301.
- the position sensor device 30 includes M magnetic sensors 300 as position sensors 302.
- the determination device 31 includes a control unit 310, a storage unit 311, an estimation unit 312, and an output unit 313.
- the position sensor 302-p (p is any integer from 2 to P) outputs a detection signal, which is a signal representing the detection result (magnetic flux component of the pole pair) of the position of the magnet 2-p, to the extraction unit 301. do.
- the extraction unit 301 reduces in-phase noise in each detection signal.
- the extraction unit 301 extracts the feature amount of the detection signal from each detection signal for each position of the magnet 2.
- the extraction unit 301 outputs the feature amount (array data) of the detection signal for each position to the estimation unit 312 and the control unit 310.
- the estimation device 3c is a device that estimates the state of the position sensor device 30 as a device for detecting the position of the rotor 201 or the rotor 203 (rotating body).
- the estimation device 3c may estimate the state of the magnet 2.
- the number of magnets 2 is plural.
- the position sensor device 30 includes a position sensor 302 for each magnet 2. Thereby, it is possible to estimate the degree of change in the position detection sensitivity for the plurality of magnets 2 without providing an additional dedicated sensor for estimating the degree of change in the position detection sensitivity.
- stator 202 change in magnetic flux
- change in distance between the stator 202 and the magnetic sensor 300 It is possible to estimate the state of the stator 202.
- the state of the stator 202 is, for example, a change in the resistance of the winding of the slot, the presence or absence of disconnection, a change in the amount of current due to a temperature rise, a change in the amount of magnetic flux components, and the like.
- an additional magnetic sensor 300 may be provided on the substrate 100. If the leakage flux of the stator 202 can be detected sufficiently large by the additional magnetic sensor 300, the state of the stator 202 can be estimated.
- a program for realizing the function of the estimation device in the present invention is recorded on a computer-readable recording medium (not shown), and the program recorded on this recording medium (non-temporary recording medium) is read into a computer system. , The procedure of each process may be performed by executing.
- the term "computer system” as used herein includes hardware such as an OS and peripheral devices. Further, the “computer system” shall also include a WWW system provided with a homepage providing environment (or display environment). Further, the "computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, or a storage device such as a hard disk built in a computer system.
- a "computer-readable recording medium” is a volatile memory (RAM) inside a computer system that serves as a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line.
- RAM volatile memory
- the above program may be transmitted from a computer system in which this program is stored in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium.
- the "transmission medium” for transmitting a program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
- the above program may be for realizing a part of the above-mentioned functions. Further, it may be a so-called difference file (difference program) that can realize the above-mentioned function in combination with a program already recorded in the computer system.
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
Claims (8)
- 回転体の位置を検出する装置の状態を推定する推定装置であって、
前記回転体に連動して回転可能な磁石の磁束に応じて前記磁石の位置の検出結果を表す信号である検出信号を出力する位置センサと、
前記検出信号の特徴量を前記位置ごとに前記検出信号から抽出する抽出部と、
前記位置ごとの前記検出信号の特徴量と前記位置ごとの基準値との比較結果を表す評価値を導出し、前記位置を検出する感度の変化の度合いを前記評価値に基づいて推定する推定部と
を備える推定装置。 - 前記推定部は、前記位置を表す機械角の1周期における電気角の1周期において、前記位置ごとの基準値に対して前記検出信号の特徴量が変化したことを前記評価値が表している場合、前記電気角の1周期に対応付けられた前記磁石の極対の磁束が変化したと判定する、
請求項1に記載の推定装置。 - 複数の磁気センサが、前記回転体の回転軸の回転方向に沿って等間隔で配置され、
前記推定部は、前記位置を表す機械角の1周期において、前記位置ごとの基準値に対していずれかの前記磁気センサの前記検出信号の特徴量が変化したことを前記評価値が表している場合、前記磁石と前記磁気センサとの間の距離が変化した、又は、前記磁気センサの感度が変化したと判定する、
請求項1に記載の推定装置。 - 前記位置センサは、前記磁石の磁束を検出する磁気センサを前記検出信号ごとに有し、
前記推定部は、前記位置を表す機械角の1周期において、前記位置ごとの基準値に対して全ての前記磁気センサの前記検出信号の特徴量が変化したことを前記評価値が表している場合、前記磁石の全ての極対の磁束が変化した、前記磁石と全ての前記磁気センサとの間の距離が変化した、又は、全ての前記磁気センサの感度が変化したと判定する、請求項1に記載の推定装置。 - 前記位置センサは、モータの回転子を構成する前記磁石の近傍に備えられた複数の第1磁気センサと、前記モータの固定子の近傍に備えられた複数の第2磁気センサとをそれぞれ有し、
前記抽出部は、前記第1磁気センサから入力された前記検出信号と、前記第2磁気センサから入力された磁束成分の検出結果とに基づいて、前記固定子の磁束成分の検出結果を導出し、
前記推定部は、前記固定子を流れる電流に基づく前記固定子の磁束成分の推定値と、前記固定子の磁束成分の検出結果との差に基づいて、前記固定子の変化の度合いを推定する、 請求項1に記載の推定装置。 - 前記磁石の個数は、複数であり、 前記位置センサは、前記磁石ごとに備えられる、
請求項1から請求項5のいずれか一項に記載の推定装置。 - 回転体の位置を検出する装置の状態を推定する推定装置が実行する推定方法であって、
前記回転体に連動して回転可能な磁石の磁束に応じて前記磁石の位置の検出結果を表す信号である検出信号を出力する出力ステップと、
前記検出信号の特徴量を前記位置ごとに前記検出信号から抽出する抽出ステップと、
前記位置ごとの前記検出信号の特徴量と前記位置ごとの基準値との比較結果を表す評価値を導出し、前記位置を検出する感度の変化の度合いを前記評価値に基づいて推定する推定ステップと
を含む推定方法。 - 請求項1から請求項6のいずれか一項に記載の推定装置としてコンピュータを機能させるためのプログラム。
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| CN202180020714.7A CN115280104B (zh) | 2020-03-18 | 2021-03-09 | 推断装置、推断方法以及存储程序的存储装置 |
| EP21771844.4A EP4123265B1 (en) | 2020-03-18 | 2021-03-09 | Estimation device and estimation method |
| US17/912,299 US12040734B2 (en) | 2020-03-18 | 2021-03-09 | Estimation device, estimation method, and program |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007206018A (ja) | 2006-02-06 | 2007-08-16 | Hitachi Ltd | 回転角検出装置とその異常検出装置及び電動パワーステアリング装置 |
| WO2008062778A1 (fr) | 2006-11-21 | 2008-05-29 | Hitachi Metals, Ltd. | Dispositif de détection d'angle de rotation, dispositif de rotation et procédé de détection d'angle de rotation |
| JP2009250725A (ja) * | 2008-04-03 | 2009-10-29 | Denso Corp | 回転検出装置 |
| JP2011185747A (ja) | 2010-03-09 | 2011-09-22 | Alps Electric Co Ltd | 異常検知装置 |
| WO2016027838A1 (ja) * | 2014-08-20 | 2016-02-25 | 旭化成エレクトロニクス株式会社 | 故障診断装置、回転角センサ、故障診断方法、およびプログラム |
| WO2016104378A1 (ja) | 2014-12-22 | 2016-06-30 | 日本電産株式会社 | 位置推定方法および位置制御装置 |
| JP2018141754A (ja) * | 2017-02-28 | 2018-09-13 | 株式会社リコー | 位置検出装置、調整方法、およびプログラム |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3912779B2 (ja) * | 2002-05-08 | 2007-05-09 | 松下電器産業株式会社 | 磁気式位置検出装置 |
| JP2006220530A (ja) * | 2005-02-10 | 2006-08-24 | Matsushita Electric Ind Co Ltd | 絶対回転角度検出装置 |
| JP4656024B2 (ja) * | 2006-08-22 | 2011-03-23 | 株式会社デンソー | 回転角検出装置のための異常検出装置 |
| US20150069941A1 (en) * | 2012-04-12 | 2015-03-12 | Hitachi, Ltd. | Three-Phase Synchronous Motor Drive Device |
| KR101852754B1 (ko) * | 2016-10-27 | 2018-04-27 | 엘에스산전 주식회사 | 영구자석 동기전동기의 센서리스 제어 시스템 |
| JP7070556B2 (ja) * | 2017-04-13 | 2022-05-18 | ソニーグループ株式会社 | 位置検出装置及び位置検出方法 |
| EP3410075B1 (en) * | 2017-05-30 | 2020-10-07 | MEAS France | Temperature compensation for magnetic field sensing devices and a magnetic field sensing device using the same |
| EP3467528B1 (en) * | 2017-10-06 | 2020-05-20 | Melexis Technologies NV | Magnetic sensor sensitivity matching calibration |
| JPWO2021187254A1 (ja) * | 2020-03-18 | 2021-09-23 | ||
| CN115917955A (zh) * | 2020-07-08 | 2023-04-04 | 日立安斯泰莫株式会社 | 电动机控制装置、电动机控制方法 |
-
2021
- 2021-03-09 JP JP2022508244A patent/JPWO2021187254A1/ja active Pending
- 2021-03-09 CN CN202180020714.7A patent/CN115280104B/zh active Active
- 2021-03-09 EP EP21771844.4A patent/EP4123265B1/en active Active
- 2021-03-09 WO PCT/JP2021/009384 patent/WO2021187254A1/ja not_active Ceased
- 2021-03-09 US US17/912,299 patent/US12040734B2/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007206018A (ja) | 2006-02-06 | 2007-08-16 | Hitachi Ltd | 回転角検出装置とその異常検出装置及び電動パワーステアリング装置 |
| WO2008062778A1 (fr) | 2006-11-21 | 2008-05-29 | Hitachi Metals, Ltd. | Dispositif de détection d'angle de rotation, dispositif de rotation et procédé de détection d'angle de rotation |
| JP2009250725A (ja) * | 2008-04-03 | 2009-10-29 | Denso Corp | 回転検出装置 |
| JP2011185747A (ja) | 2010-03-09 | 2011-09-22 | Alps Electric Co Ltd | 異常検知装置 |
| WO2016027838A1 (ja) * | 2014-08-20 | 2016-02-25 | 旭化成エレクトロニクス株式会社 | 故障診断装置、回転角センサ、故障診断方法、およびプログラム |
| WO2016104378A1 (ja) | 2014-12-22 | 2016-06-30 | 日本電産株式会社 | 位置推定方法および位置制御装置 |
| JP2018141754A (ja) * | 2017-02-28 | 2018-09-13 | 株式会社リコー | 位置検出装置、調整方法、およびプログラム |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4123265A4 |
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| EP4123265A1 (en) | 2023-01-25 |
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| JPWO2021187254A1 (ja) | 2021-09-23 |
| US12040734B2 (en) | 2024-07-16 |
| US20230141056A1 (en) | 2023-05-11 |
| CN115280104A (zh) | 2022-11-01 |
| EP4123265A4 (en) | 2024-04-10 |
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