EP4384777A1 - Ensemble bobine secondaire pour système codeur à induction, et système codeur à induction - Google Patents

Ensemble bobine secondaire pour système codeur à induction, et système codeur à induction

Info

Publication number
EP4384777A1
EP4384777A1 EP22735179.8A EP22735179A EP4384777A1 EP 4384777 A1 EP4384777 A1 EP 4384777A1 EP 22735179 A EP22735179 A EP 22735179A EP 4384777 A1 EP4384777 A1 EP 4384777A1
Authority
EP
European Patent Office
Prior art keywords
secondary coil
receiver
encoder system
coil
coils
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22735179.8A
Other languages
German (de)
English (en)
Inventor
Josef Siraky
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Neura Robotics GmbH
Original Assignee
Neura Robotics GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Neura Robotics GmbH filed Critical Neura Robotics GmbH
Publication of EP4384777A1 publication Critical patent/EP4384777A1/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • 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
    • G01D5/20—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 by varying inductance, e.g. by a movable armature
    • G01D5/204—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 by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • 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

Definitions

  • the invention relates to a secondary coil arrangement for an inductive encoder system and an inductive encoder system.
  • inductive encoder systems are used in the most diverse fields of application.
  • they can be in the form of rotary encoders or length measuring systems.
  • inductive encoder systems are constructed in such a way that a primary coil generates a magnetic field, as a result of which a current is induced in one or more secondary coils.
  • the voltage induced in the secondary coils changes, allowing the position of the target relative to the secondary coils to be determined.
  • the structure of inductive encoder systems is preferably realized with printed circuit boards, with the coils being applied to the printed circuit boards by means of conductor tracks.
  • the coil geometries, in particular the secondary coils must be designed accordingly.
  • DE 103 20 990 A1 discloses an inductive rotary encoder in which the coil geometries of the secondary coils are sinusoidal and cosinusoidal.
  • a linear position value of the target can be calculated over a period by means of an arctangent function via the resulting sinusoidal and cosinusoidal profile of the measurement signals picked up at the secondary coils.
  • a disadvantage of the prior art is that the conductor tracks, in particular the secondary coil conductor tracks, cross in the modulation area that is important for signal generation, and it is therefore necessary to use vias.
  • Connections in line carriers that produce an electrical contact between conductor tracks arranged on different line carrier levels are usually referred to as plated-through holes. If two conductor tracks cross, one of the conductor tracks in the crossing area is usually laid on a different conductor carrier level, so that despite the crossing there is no electrically conductive contact between the relevant conductor tracks. As a rule, two plated-through holes are thus arranged at each crossing.
  • a via usually requires a circular area with a diameter of approx. 0.3mm.
  • a distance of at least 0.1 mm must be maintained from conductor tracks leading past.
  • the invention is therefore based on the object of providing a secondary coil arrangement for an inductive encoder system, with which a high resolution can be achieved, which can be produced flexibly and with which the quality of the measurement result is improved. Another object of the invention is to provide a corresponding inductive encoder system.
  • a secondary coil arrangement according to the invention for an inductive encoder system has a plurality of secondary coils, each secondary coil having a secondary coil conductor track, and the secondary coil conductor tracks being arranged on a conductor carrier without crossing.
  • the conductor tracks from which the secondary coils are formed are preferably referred to as secondary coil conductor tracks.
  • Connection conductor tracks, with which the secondary coil conductor tracks are contacted, for example for integration into a circuit, are preferably not considered part of the secondary coil traces.
  • the secondary coils are preferably arranged in such a way that the secondary coil conductor tracks do not cross over in the direction of a secondary coil axis when viewed from above.
  • the line carrier can be formed, for example, by a printed circuit board or glass plate. In particular when the conductor carrier is formed by a glass plate, the conductor tracks can be sputtered on.
  • Each secondary coil preferably has a secondary coil surface with a secondary coil contour, the secondary coil contour corresponding to the contour that has a surface that is included in the interval from 45° to 225° between a sine function and a cosine function.
  • secondary coil contours with a typically curved shape can be realized.
  • this form will be referred to as the sine-cosine differential form.
  • the characteristics of a conventional secondary coil arrangement can be well simulated with such secondary coils.
  • the secondary coil arrangement particularly preferably has an arrangement contour which at least partially corresponds to the contour which has a surface which is defined by a plurality of sine-cosine difference surface is formed.
  • the outline of the area covered by the entire secondary coil arrangement is preferably referred to as the arrangement contour.
  • the secondary coil arrangement is arranged in a linear, circular or annular manner.
  • a length measuring system can be implemented with a linear arrangement.
  • a circular or annular arrangement of the secondary coil arrangement is preferably used for rotary encoders, ie in particular for angle measuring systems.
  • the secondary coil contour or the array contour overlaid with the circular shape. A typical flower-shaped arrangement contour can result from this.
  • the secondary coils are preferably arranged adjacent to one another in a longitudinal direction of the secondary coil arrangement.
  • the adjacent arrangement is preferably implemented in such a way that two adjacent secondary coils are electrically isolated from one another.
  • the longitudinal direction is preferably formed by the direction in which a target whose position is to be determined is intended to move relative to the secondary coil arrangement.
  • the longitudinal direction can be designed in a correspondingly arcuate manner in the direction of a corresponding arc of a circle.
  • the secondary coils are designed in sine-cosine differential form, the secondary coils are preferably arranged adjacent to one another in such a way that between the individual seconds the coils result in a phase shift of 90°.
  • a secondary coil arrangement can thus have an in particular repeating secondary coil set of in particular four secondary coils. If a first secondary coil is referred to as a positive sine coil according to a contour line delimiting it at the top, a second secondary coil adjoining it to the right can be referred to as a positive cosine coil. This can be followed by a negative sine coil as the third secondary coil and a negative cosine coil as the fourth secondary coil.
  • the negative cosine coil is preferably in turn followed by a positive sine coil of a further set of secondary coils.
  • the secondary coils are arranged in a plurality of blocks arranged parallel to one another in the longitudinal direction.
  • the secondary coils can thereby be offset from one another in the longitudinal direction.
  • the number of secondary coils per unit of length can be increased in the longitudinal direction.
  • the accuracy of an encoder system accommodating the secondary coil arrangement can thus be increased.
  • the line carrier preferably has at least one line carrier level and the adjacent secondary coils can be arranged in the same line carrier level or in different line carrier levels.
  • the complexity of the line carrier and thus, in particular, the production costs can be reduced.
  • the adjacent secondary coils can be arranged without offset in the longitudinal direction, without between the adjacent adjacent secondary coils creates an electrically conductive contact.
  • An inductive encoder system comprises at least one primary coil, which has a modulation area, and at least one receiver track, which has at least one receiver line set and a secondary coil arrangement as described above, the secondary coil arrangement being arranged within the modulation area.
  • the area surrounded by the at least one primary coil is preferably referred to as the modulation area.
  • a primary coil current which is particularly preferably in the form of an alternating current, preferably flows in the at least one primary coil.
  • a voltage can be induced in particular in the secondary coils arranged in the modulation area.
  • an electrically conductive target over at least one of the secondary coils, the induction of the voltage in this at least one secondary coil can be influenced.
  • the encoder system can have at least one secondary coil set made up of a plurality of secondary coils, it being possible for the secondary coils of the at least one secondary coil set to be contacted differently on the at least one receiver line set.
  • the secondary coils can be contacted on the at least one receiver wiring harness with the aid of connection conductor tracks.
  • a receiver circuit is preferably formed by a set of receiver lines, the secondary coils contacted thereon and, if appropriate, the connection printed conductors used for the respective contacting.
  • the secondary coils that are contacted on the same set of receiver lines have different flow directions. As a result, the position of the target can be absolutely determined in the area of the at least one secondary coil set become .
  • the different flow directions are preferably implemented in that the secondary coils that are contacted on the same receiver wiring harness are poled differently.
  • the at least one receiver track has a first receiver line set and a second receiver line set
  • the at least one secondary coil set has a first secondary coil, a second secondary coil, a third secondary coil and a fourth secondary coil
  • the first secondary coil and the third Secondary coil are contacted to the first receiver wiring harness and the second secondary coil and the fourth secondary coil are contacted to the second receiver wiring harness.
  • the first to fourth secondary coils are arranged adjacent to one another in ascending order.
  • the voltages induced in the first secondary coil and in the third secondary coil can be at least approximately the same in terms of absolute value.
  • the same preferably applies to the voltages induced in the second secondary coil and in the fourth secondary coil.
  • the target is at least partially arranged above one of the secondary coils, the voltage induced in this secondary coil can change in comparison to the other secondary coil arranged in the same receiver circuit, so that in the corresponding receiver current circle a current can flow .
  • the target is preferably designed in such a way that it can completely cover at most one of the secondary coils. Because the secondary coils that are not directly adjacent to one another are each arranged in the same receiver circuit, the resolution of the encoder system can be improved.
  • the target is preferably designed in such a way that it has a number of target elements.
  • the target elements are preferably arranged at a distance from one another such that the secondary coils of two consecutive secondary coil arrangements which correspond to one another can be covered.
  • the target can thus be in the form of a grid. This allows the target to be placed over the corresponding secondary coils at the same time.
  • the encoder system has at least one receiver track, a third receiver line set and a fourth receiver line set.
  • the at least one secondary coil set can have a fifth secondary coil, a sixth secondary coil, a seventh secondary coil and an eighth secondary coil, the fifth secondary coil and the seventh secondary coil being in contact with the third receiver wiring harness and the sixth secondary coil and the eighth secondary coil being in contact with the fourth receiver wiring harness are .
  • the area of a secondary coil set and thus preferably the area in which the position of a target can be absolutely determined can be particularly large and/or have a particularly high concentration of secondary coils, whereby the resolution of the encoder system can be increased.
  • the invention can be designed such that the first receiver wiring harness and the third receiver wiring harness are in electrically conductive contact with one another, and that the second receiver wiring harness and the fourth receiver wiring harness are in electrically conductive contact with one another.
  • the first receiver wiring harness and the third receiver wiring harness as well as the second receiver wiring harness and the fourth receiver wiring harness are contacted with one another in such a way that the adjacent secondary coils have different flow directions.
  • the secondary coils that are contacted on the same receiver wiring harness are arranged offset in the longitudinal direction in different blocks.
  • the resolution of the encoder system can be increased, in particular given the same coil dimensions.
  • the offset is preferably between half and twice the dimension of a secondary coil in the longitudinal direction.
  • the inductive encoder system has a first receiver track and a second receiver track, with the first receiver track having a plurality of secondary coil sets and the second receiver track having precisely one secondary coil set.
  • the first receiver track and the second receiver track are preferably arranged next to one another in the longitudinal direction.
  • the position of the target can be determined with a relatively high degree of accuracy by means of the first receiver track.
  • the absolute position of the target over the entire length of the encoder system can be determined using the second receiver track. This allows the position of the target can be absolutely determined over the entire length of the encoder system with a relatively high degree of accuracy.
  • the at least one primary coil is particularly preferably arranged on a first line carrier level and the secondary coil arrangement is arranged on a second line carrier level.
  • the at least one receiver wiring harness can be arranged on the second line carrier level.
  • the secondary coils can thereby be contacted to the at least one receiver wiring harness without through-plating being required.
  • the at least one primary coil of the inductive encoder system can be designed in the shape of a circular ring.
  • the modulation area can have a circular shape.
  • the at least one primary coil is preferably designed in the shape of a circular ring when the secondary coil arrangement is arranged in a circular or circular ring shape.
  • the at least one primary coil is preferably designed in the shape of a circular ring if the inductive encoder system is designed as a rotary encoder.
  • the modulation area is designed in the shape of a circular ring with an outer diameter and an inner diameter, and is delimited on the outer diameter by a first primary coil and on the inner diameter by a second primary coil.
  • the electromagnetic field in the modulation area can be more concentrated and more homogeneous, with which the quality of the measurement signals to be picked up at the receiver coils can be increased in particular.
  • Such an embodiment of the inductive encoder system can be particularly advantageous in the case of large diameters of the primary coils and the secondary coil arrangement.
  • the concentration and the homogeneity of the electromagnetic field in the modulation region can be increased further by having a current direction in the first primary coil that is opposite to the current direction in the second primary coil.
  • FIG. 1 An exemplary embodiment of an inductive encoder system of the prior art is shown in FIG.
  • FIG. 2 shows a schematic representation of a secondary coil arrangement with a sine-cosine differential form
  • FIG. 3 shows a schematic representation of a first exemplary embodiment of an inductive encoder system with a linear secondary coil arrangement
  • FIG. 4 shows a schematic representation of a second exemplary embodiment of an inductive encoder system with an annular secondary coil arrangement
  • FIG. 5 shows a schematic representation of part of a third exemplary embodiment of an inductive encoder system with an annular secondary coil arrangement and an annular modulation area
  • FIG. 6 shows a schematic representation of a fourth exemplary embodiment of an inductive encoder system
  • FIG. 6a shows a schematic representation of a first part of the exemplary embodiment shown in FIG.
  • FIG. 6b shows a schematic representation of a second part of the exemplary embodiment shown in FIG.
  • FIGs 1 to 6b show different embodiments. For the sake of clarity, not all reference numbers are used in each figure. The same reference numbers are used for parts that are the same and have the same function.
  • FIG. 1 shows a prior art inductive encoder system 110 having an annular primary coil 112 having a circular modulation region 114 .
  • a secondary coil arrangement 115 with a first secondary coil 116, a second secondary coil 118, a third secondary coil 120 and a fourth secondary coil 122 is arranged in the form of a circular ring in the modulation region 114.
  • Each of the secondary coils 116, 118, 120, 122 has a secondary coil conductor track 123.
  • the conductor tracks from which the secondary coils 116, 118, 120, 122 are formed are preferably referred to as secondary coil conductor tracks 123.
  • the secondary coils 116, 118, 120, 122 are arranged in the same line carrier plane.
  • a via 124, shown as a point, is arranged before and after each crossing.
  • a four-part target 125 is also shown above the secondary coil arrangement 115 .
  • a secondary coil arrangement 15 according to the invention for an inductive encoder system 10 has a plurality of secondary coils 16, 18, 20, 22, each secondary coil 16, 18, 20, 22 having a secondary coil conductor track and the secondary coil conductor tracks 23 without crossing on a conductor carrier at- are ordered. Exemplary embodiments of such encoder systems are shown in FIG. 3 , 5 & . 6 shown . Because the secondary coil conductor tracks 23 are arranged without crossing, a secondary coil arrangement 15 can be provided whose secondary coil conductor tracks 23 have no vias 24 . Connection traces 28 (see FIGS. 3 and 4), with which the secondary coil traces 23 are contacted, for example for integration into an electric circuit, are preferably not regarded as part of the secondary coil traces 23.
  • each secondary coil 16, 18, 20, 22 has a secondary coil surface 32 with a secondary coil contour 34, the secondary coil contour 34 corresponding to the contour having a surface that lies in the interval from 45° to 225° between a sine function and a cosine function is included .
  • secondary coil contours 34 can be realized which have the sine-cosine differential form.
  • the secondary coil arrangement 15 shown in FIG. 3 , 4 & . 5 shown secondary coil contours 34 in sine-cosine difference form on.
  • the secondary coil arrangement 15 preferably has an arrangement contour 30 which corresponds at least in sections to the contour which has a surface which is formed by a plurality of adjacently arranged sine-cosine differential surfaces.
  • the outline of the area covered by the entire secondary coil arrangement 15 is preferably referred to as the arrangement contour 30 .
  • the secondary coil assembly 15 is arranged linearly. With a linear Arrangement can be realized in particular a length measuring system.
  • the secondary coil arrangements 15 are arranged in the shape of a circular ring.
  • the secondary coil contour 15 or the arrangement contour 30 superimposed with the circular shape.
  • a typical flower-shaped arrangement contour 30, as shown in FIG. 4 u . 5 is shown, result.
  • An annular arrangement of the secondary coil arrangement 15 is preferably used for rotary encoders, ie in particular for angle measuring systems.
  • the secondary coils 16 , 18 , 20 , 22 are preferably arranged adjacent to one another in a longitudinal direction 36 of the secondary coil arrangement 15 .
  • the adjacent arrangement is preferably implemented in such a way that two adjacent secondary coils 16, 18, 20, 22 are electrically insulated from one another.
  • an insulating gap 38 can be arranged between two adjacent secondary coils 16, 18, 20, 22 for this purpose.
  • the longitudinal direction 36 is preferably formed by the direction in which a target 25 whose position is to be determined is intended to move relative to the secondary coil arrangement 15 .
  • the longitudinal direction 36 can be correspondingly arcuate in the direction of a corresponding arc of a circle.
  • the secondary coils 16, 18, 20, 22 are in the form of a sine-cosine difference, the secondary coils 16, 18, 20, 22 are preferably arranged adjacent to one another in such a way that between the individual secondary coils 16, 18, 20, 22 gives a phase shift of 90°.
  • the first secondary coil 16 is referred to as a positive sine coil according to a contour line 40 delimiting it at the top
  • a the second secondary coil 18 adjacent to the right can be referred to as a positive cosine coil.
  • This can be followed by a negative sine coil as the third secondary coil 20 and a negative cosine coil as the fourth secondary coil 22 .
  • the four secondary coils 16 , 18 , 20 , 22 can thus form a secondary coil set 39 .
  • the fourth secondary coil 22 embodied as a negative cosine coil is then preferably followed by a first secondary coil 16 embodied as a positive sine coil of a further secondary coil set 39 .
  • An inductive encoder system 10 as shown in FIGS. 3 u . 4 comprises a primary coil 12 having the modulation region 14 and the receiver trace 42 having receiver wire sets 44a, 44b and a secondary coil assembly 15 as described above, the secondary coil assembly 15 being located within the modulation region.
  • the area surrounded by the primary coil 12 is preferably referred to as the modulation area 14 .
  • a primary coil current preferably flows in the primary coil 12 and is particularly preferably in the form of an alternating current. As a result, a voltage can be induced in particular in the secondary coils 16 , 18 , 20 , 22 arranged in the modulation region 14 .
  • the induction of the voltage in this at least one secondary coil 16 , 18 , 20 , 22 can thereby be influenced by the arrangement of the electrically conductive target 25 over at least one of the secondary coils 16 , 18 , 20 , 22 .
  • the target 25 is positioned completely over the second secondary coil 18 and partially over the first secondary coil 16 and the third secondary coil 20 .
  • the secondary coils 16, 18, 20, 22 of a secondary coil set 39 can be contacted differently on the receiver line sets 44a, 44b.
  • Two secondary coils 16, 18, 20, 22, which are contacted to the same set of receiver wires 44a, 44b, are particularly preferably poled differently.
  • the position of the target 25 can be absolutely determined in the area of a secondary coil set 39 by different contacting.
  • the receiver track 42 preferably has a first receiver line set 44a and a second receiver line set 44b, and each of the secondary coil sets has the first secondary coil 16, the second secondary coil 18, the third secondary coil 20 and the fourth secondary coil 22, with each the first secondary coil 16 and the third secondary coil 20 are contacted to the first receiver wiring harness 44a and the second secondary coil 18 and the fourth secondary coil 22 are contacted to the second receiver wiring harness 44b.
  • the contact is preferably made with the aid of the connection conductor tracks 28 .
  • the first secondary coil 16 and the third secondary coil 20 can form a first receiver circuit with the connection conductor tracks 28 arranged thereon and the first receiver line set 44a.
  • the second secondary coil 18 and the fourth secondary coil 22 with the connection conductor tracks 28 arranged thereon and the first receiver line set 44a can form a second receiver circuit.
  • the first secondary coil 16 and the third secondary coil 20 each have different poles
  • the second secondary coil 18 and the fourth secondary coil 22 each have different poles. Preference is given to the first to fourth secondary coil 16, 18, 20, 22 arranged adjacent to each other in ascending order.
  • the voltages induced in the first secondary coil 16 and in the third secondary coil 20 can be at least approximately the same in terms of absolute value (see in particular FIG. 3). The same preferably applies to the voltages induced in the second secondary coil 18 and in the fourth secondary coil 22 . Due to the different polarity of the secondary coils 16, 18, 20, 22 arranged on the same set of receiver wires 44a, 44b, preferably at least approximately no current flows in the respective receiver circuit as long as there is no target 25 above the secondary coil arrangement 15.
  • the target 25 is at least partially arranged over one of the secondary coils 16, 18, 20, 22, the voltage induced in this secondary coil can change in comparison to the other secondary coil 16, 18, 20, 22 arranged on the same receiver wiring harness 44a, 44b. so that a current can flow in the corresponding receiver circuit.
  • the target 25 is preferably designed in such a way that it can completely cover at most one of the secondary coils 16 , 18 , 20 , 22 .
  • the secondary coil arrangement 15 or the receiver line sets 44a, 44b are arranged within the modulation region 14.
  • the primary coil 12 is particularly preferably arranged on a first line carrier level and the secondary coil arrangement 15 on a second line carrier level.
  • no vias 24 are required at the intersection of the primary coil 12 and the connection conductor tracks 28.
  • the receiver line Sets 44a, 44b can also be arranged on the second line carrier level.
  • the secondary coils 16, 18, 20, 22 can thereby be contacted to the receiver wire harnesses 44a, 44b without vias 24 being required.
  • the primary coil 12 of the encoder system 10 can, as shown in FIG. 4 shown, be formed in the shape of a circular ring.
  • the modulation region 14 can have a circular shape.
  • the modulation region 14 is annular with an outer diameter 46 and an inner diameter 48, and is bounded on the outer diameter 46 by a first primary coil 12a and on the inner diameter 48 by a second primary coil 12b.
  • a current direction 50 in the first primary coil 12a is opposite to the current direction 50 in the second primary coil 12b.
  • the in Fig. 5 illustrated embodiment 32 secondary coil sets 39 have. Accordingly, in Fig. 5 encoder system shown have a 32-part target 25.
  • the resolution of the encoder system 10 can be significantly increased by means of the high number of secondary coil sets 39 .
  • Such a high density of secondary coil sets 39 can be realized in particular because no vias 24 are arranged within the modulation region 14 .
  • FIG. 6 illustrated embodiment in FIG. 6a shown.
  • the encoder system 10 can have a third receiver wire set 44c and a fourth receiver wire set 44d in addition to the first receiver wire set 44a and the second receiver wire set 44b.
  • the at least one secondary coil set 39 can have a fifth secondary coil 16a, a sixth secondary coil 18a, a seventh secondary coil 20a and an eighth secondary coil 22a, with the fifth secondary coil 16a and the seventh secondary coil 20a preferably being contacted to the third receiver line set 44c and the sixth secondary coil 18a and the eighth secondary coil 22a are contacted to the fourth receiver line set 44d.
  • the first secondary coil 16 to the eighth secondary coil 22a preferably each have a secondary coil contour 34 which is formed in a sine-cosine differential form. In the figs. 6 to 6b, this contour is shown as an oval for easier representation.
  • the secondary coils that are contacted on the same receiver wiring harness are arranged offset in the longitudinal direction 36 in different blocks.
  • the first secondary coil 16 can be arranged in a first block 52 and the third secondary coil 20 can be arranged in a second block 54, with the first secondary coil 16 and the third secondary coil 20 both being in contact with the first receiver wiring harness 44a and being offset in the longitudinal direction 36 can .
  • the second secondary coil 18 can be arranged in the first block 52 and the fourth secondary coil 22 can be arranged in the second block 54, with the first secondary coil 18 and the third secondary coil 20 both being in contact with the second receiver wiring harness 44b and being arranged offset in the longitudinal direction 36 can .
  • the fifth secondary coil 16a can be arranged in the first block 52 and the seventh secondary coil 20a in the second block 54 be arranged, wherein the fifth secondary coil 16a and the seventh secondary coil 20a both contacted to the third receiver line set 44c and offset in the longitudinal direction 36 can be arranged.
  • the sixth secondary coil 18a can be arranged in the first block 52 and the eighth secondary coil 22a can be arranged in the second block 54, with the sixth secondary coil 18a and the eighth secondary coil 22a both being in contact with the fourth receiver wiring harness 44d and being offset in the longitudinal direction 36 can .
  • Fig. 6a shows the secondary coils 16, 18, 20, 22 that make contact with the first receiver line set 44a and the second receiver line set 44b.
  • Fig. 6b shows the secondary coils 16a, 18a, 20a, 22a contacted to the third receiver line set 44c and to the fourth receiver line set 44d.
  • the secondary coil conductor tracks 23 arranged in a first line carrier plane are shown in solid lines.
  • the secondary coil conductor tracks arranged in a second line carrier level are shown in dashed lines.
  • Fig. 6 are the two in Fig. 6a and . 6b shown parts of the encoder system 10 shown in combination. It can be seen in particular from this illustration that the secondary coils 16, 16a, 18, 18a and 20, 20a, 22, 22a that adjoin one another can be arranged in different line carrier planes. There is preferably no offset between the adjacent secondary coils. In particular, the adjacent sections of the secondary coil conductor tracks 23 can lie on top of one another. For reasons of representation and for better visibility, these sections are shown in FIG. 6 shown partially side by side. The ones shown in Fig. Arrows partially arranged on the secondary coils in FIGS. 6 to 6a show an example of the flow direction 56 of the current induced in the respective coil when no target 25 is arranged above it.
  • the resulting currents in the receiver line sets 44a to 44d cancel each other out, at least approximately. If the target 25 is at least partially arranged above one of the secondary coils 16 to 22a, a voltage can be measured on the respective receiver line set 44a to 44d.
  • the target 25 as shown in FIG. 6 indicated, preferably designed such that it has several target elements.
  • the target elements are preferably arranged at a distance from one another such that the secondary coils 16, 16a, 18, 18a, 20, 20a, 22, 22a of two consecutive secondary coil arrangements 15 that correspond to one another can be covered.
  • the target 25 can thus be in the form of a grid.
  • the target can be arranged simultaneously over the mutually corresponding secondary coils 6, 16a, 18, 18a, 20, 20a, 22, 22a.
  • the invention can be designed such that the first set of receiver lines 44a and the third set of receiver lines 44c are in electrically conductive contact with one another, and that the second set of receiver lines 44b and the fourth set of receiver lines 44d are in electrically conductive contact with one another.
  • it may be sufficient to connect two of the receiver line sets 44a, 44b, 44c, 44d to an evaluation unit.
  • the first set of receiver lines 44a and the third set of receiver lines 44c, and the second set of receiver lines 44b and the fourth set of receiver lines 44d are so contacted with each other that the adjacent secondary coils 16, 16a, 18, 18a and 20, 20a, 22, 22a have different flow directions 56.

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

La présente invention concerne : un ensemble bobine secondaire (15) pour un système codeur à induction (10), comprenant une pluralité de bobines secondaires (16, 16a, 18, 18a, 20, 20a, 22, 22a), chaque bobine secondaire (16, 16a, 18, 18a, 20, 20a, 22, 22a) présentant une piste conductrice de bobine secondaire (23), les pistes conductrices de bobine secondaire (23) étant disposées sur un support de conducteur de telle sorte qu'elles ne croisent pas ; et un système codeur à induction (10) comprenant au moins une bobine primaire (12, 12a, 12b) présentant une région de modulation (14), et au moins une piste réceptrice (42) présentant au moins un ensemble de lignes réceptrices (44a, 44b, 44c, 44d) et un ensemble bobine secondaire (15) susmentionné, l'ensemble bobine secondaire (15) étant situé à l'intérieur de la région de modulation (14).
EP22735179.8A 2021-08-12 2022-06-24 Ensemble bobine secondaire pour système codeur à induction, et système codeur à induction Pending EP4384777A1 (fr)

Applications Claiming Priority (2)

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DE102021121052.6A DE102021121052A1 (de) 2021-08-12 2021-08-12 Sekundärspulenanordnung für ein induktives Encodersystem sowie induktives Encodersystem
PCT/EP2022/067425 WO2023016691A1 (fr) 2021-08-12 2022-06-24 Ensemble bobine secondaire pour système codeur à induction, et système codeur à induction

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EP4384777A1 true EP4384777A1 (fr) 2024-06-19

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US (1) US20240371564A1 (fr)
EP (1) EP4384777A1 (fr)
JP (1) JP7735539B2 (fr)
KR (1) KR20240042514A (fr)
CN (1) CN118119824A (fr)
DE (1) DE102021121052A1 (fr)
WO (1) WO2023016691A1 (fr)

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DE102023102164B4 (de) * 2023-01-30 2024-09-05 Pwb Encoders Gmbh Sekundärspulenanordnung für einen induktiven Encoder

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743508A2 (fr) 1995-05-16 1996-11-20 Mitutoyo Corporation Capteur de position employant un courant d'induction
DE10320990A1 (de) 2003-05-09 2004-11-25 Dr. Johannes Heidenhain Gmbh Induktiver Drehwinkelsensor und damit ausgestatteter Drehgeber
JP2005134247A (ja) * 2003-10-30 2005-05-26 Mitsutoyo Corp 誘導型変位検出装置及びマイクロメータ
GB0427761D0 (en) 2004-12-20 2005-01-19 Kreit Darran Position encoder for a rotor
US10203225B2 (en) 2014-08-25 2019-02-12 Nsd Corporation Rotation detector
DE102017210655B4 (de) * 2017-06-23 2023-12-21 Robert Bosch Gmbh Drehwinkelsensor
DE102017211190A1 (de) * 2017-06-30 2019-01-03 Robert Bosch Gmbh Sensorsystem zur Bestimmung mindestens einer Rotationseigenschaft eines rotierenden Elements
US11047710B2 (en) * 2018-05-23 2021-06-29 KSR IP Holdings, LLC Inductive position sensor assembly
DE102018222292A1 (de) 2018-12-19 2020-07-09 Continental Teves Ag & Co. Ohg Induktiver Sensor
JP7270903B2 (ja) * 2019-10-02 2023-05-11 多摩川精機株式会社 平板型エンコーダ
WO2021150906A1 (fr) * 2020-01-24 2021-07-29 Sensata Technologies, Inc. Capteurs inductifs de position
JP7461902B2 (ja) 2021-02-08 2024-04-04 双葉電子工業株式会社 レゾルバ

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JP7735539B2 (ja) 2025-09-08
WO2023016691A1 (fr) 2023-02-16
JP2024529138A (ja) 2024-08-01
DE102021121052A1 (de) 2023-02-16
CN118119824A (zh) 2024-05-31
US20240371564A1 (en) 2024-11-07
KR20240042514A (ko) 2024-04-02

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