EP3072221A2 - Elektrische maschine mit einer sensoreinrichtung zur rotorlageerkennung - Google Patents
Elektrische maschine mit einer sensoreinrichtung zur rotorlageerkennungInfo
- Publication number
- EP3072221A2 EP3072221A2 EP14801971.4A EP14801971A EP3072221A2 EP 3072221 A2 EP3072221 A2 EP 3072221A2 EP 14801971 A EP14801971 A EP 14801971A EP 3072221 A2 EP3072221 A2 EP 3072221A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor element
- rotor
- bolt
- machine according
- sensor
- 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.)
- Ceased
Links
- 230000005291 magnetic effect Effects 0.000 claims abstract description 21
- 230000004907 flux Effects 0.000 claims abstract description 16
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 6
- 238000001746 injection moulding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 230000005355 Hall effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
- H02K2211/03—Machines characterised by circuit boards, e.g. pcb
Definitions
- the invention relates to an electrical machine
- stator and rotor in particular an electric motor, with a stator and a rotor and a stationary sensor device for detecting the relative position between stator and rotor,
- the sensor device comprises a flux guide and a magnetic sensor element and on the
- the sensor element is arranged at a distance from the rotor and an air gap located between the sensor element and the rotor is bridged by the flux guide, and
- the sensor element is arranged directly on a circuit board.
- fixed sensor device means that it does not rotate in the operating state, but like the
- the Stator is fixed.
- the sensor device may e.g. be firmly or detachably connected to the stator or the stator housing.
- the flux guide is used for the measurement
- the flux guide is usually made of a ferromagnetic or soft magnetic material. State of the art
- Sensor element is a Hall sensor and the ferromagnetic or soft magnetic flux guide to form a magnetic yoke two leading to the rotor
- Flow element is complicated to manufacture due to the structure of two pole sections and a bridge.
- Flux guide has.
- Flux guide a single ferromagnetic
- a single bolt is easier to manufacture as a one-piece element, so a three-piece flow element.
- the bolt can be attached to the stator more easily, namely only at one point, while the three-part flow element of the prior art must be fastened to the stator in two places.
- the bolt tapers toward the sensor element, it causes concentration of magnetic field lines at the end of the bolt, which is in the immediate vicinity of the sensor element.
- concentration of magnetic field lines at the end of the bolt which is in the immediate vicinity of the sensor element.
- the magnetic field at this end of the bolt is amplified, the sensor element receives a stronger signal.
- a possible mounting of the bolt is that the bolt is mounted at its, the sensor element remote from the end in a sleeve.
- the sleeve surrounds the bolt preferably in a form-fitting manner.
- the sleeve has e.g. one
- the sleeve is at least partially surrounded the entire circumference of the bolt.
- the sleeve can in the longitudinal direction of the bolt more than
- the sleeve can be made particularly simple if it is formed integrally with at least part of the housing of the stator.
- the sleeve and the sleeve having part of the housing of the stator may be made of plastic and, for example by injection molding
- the bolt can be introduced simultaneously with the manufacture of the sleeve in this, so that the bolt is poured into the sleeve.
- the bolt could be about this in the
- Injection molding tool are inserted before the liquid
- the bolt can be made in the sleeve of the finished
- Injection molded part are used.
- the sensor element may be fastened to the rotor-facing side of the printed circuit board. This has the advantage that the Distance between the sensor element and the rotor is smaller and the flux guide can be made correspondingly shorter.
- the sensor element may be attached to the side facing away from the rotor of the circuit board, wherein the circuit board provided via a below the sensor element
- Passage for the bolt features. Through this passage - in the form of a through hole in the circuit board - the bolt can still be brought directly (without circuit board in between) and close to the sensor element, approximately to a distance of less than 2 mm, in particular less than 1 mm, by the End of the bolt protrudes into this passage. Since the other components of the circuit board are usually mounted on the side facing away from the rotor, can
- Process step are mounted on the circuit board, then there is a one-sided board assembly instead.
- Passage projects have a smaller diameter than in another longitudinal region, in particular at the other end, where the bolt is mounted in the sleeve. In addition to the concentration of the magnetic field lines, this also has the advantage that the passage can be kept small.
- Diameter of the passage will usually be smaller than the diameter of the sensor element, because the
- Sensor element is usually attached with a part of its bottom to the circuit board and electrically contacted.
- the diameter of the bolt is generally smaller than the diameter of the sensor element.
- the outer diameter of the sleeve may correspond to the diameter of the sensor element.
- the length of the bolt can be two to three times that of
- Diameter of the sensor element amount but it can also be much longer. So that the sensor element in the same process step as the other components of the circuit board (to form a
- Printed circuit board can be equipped automatically, it can be provided that the sensor element as
- SMDs Surface-mounted devices
- THT Through Hole Technology
- the surface mounting of the sensor element eliminates the surge or wave soldering of the sensor elements, which also results in a higher quality of the solder joints.
- the sensor element is usually used as a Hall sensor
- a Hall sensor also Hall sensor or Hall sensor
- a Hall sensor thus provides a signal even if the magnetic field in which it is located, is constant.
- GMR giant magnetoresistance
- Fig. 1 is a longitudinal section through an inventive
- FIG. 2 shows a detail of FIG. 1 comprising the sensor element and the bolt
- Fig. 3 is a longitudinal section through an inventive
- Fig. 4 shows a detail of Fig. 3 comprising the sensor element and the bolt.
- Fig. 1 shows an electric motor with a stator 6 and a rotor 5 and a stationary sensor device which is mounted on the stator 6, more precisely on the housing of the stator 6.
- the sensor device comprises a flux guide element which can be designed as a rotationally symmetrical (cylindrical) bolt 3 or also as a bolt 3 with an angular (for example substantially rectangular) cross section, and a magnetic guide
- Sensor element 2 which is designed as a Hall sensor.
- FIG. 2 shows a detail from FIG. 1.
- FIG. 2 shows that the sensor element 2 is located directly on a
- Printed circuit board 1 is arranged, on that side which faces the rotor 5.
- the printed circuit board 1 contains - not shown here - other components for the control of the electric motor. These components are mounted on the other side of the circuit board 1.
- the bolt 3 is aligned the center axis of the sensor element 2, its diameter is here slightly smaller than the diameter of the sensor element and substantially unchanged over the entire length of the
- the bolt 3 is held in a sleeve 4, whose length is about three quarters of the length of the bolt 3.
- the sleeve 4 is made in one piece with the housing of the stator 6 and was made by injection molding of plastic.
- FIG. 3 essentially shows the same electric motor as in FIG. 1.
- the sensor device again comprises a single flux-conducting element, which can be designed as a rotationally symmetrical or angular bolt 3, and a magnetic one
- Sensor element 2 which is designed as a Hall sensor.
- FIG. 4 shows - analogous to FIG. 2 with respect to FIG. 1 - a detail from FIG. 3.
- the sensor element 2 is arranged directly on a printed circuit board 1, specifically on that side, which faces away from the rotor 5.
- the circuit board 1 contains on the same page - not shown here - other components for the control of the electric motor.
- the bolt 3 is aligned with the central axis of the sensor element 2, its diameter is here again smaller than the diameter of the sensor element 2.
- the diameter of the pin 3 tapers to that end, which faces away from the rotor 5, to about half of the diameter near the rotor.
- the bolt 3 protrudes at its rotor remote end by a directly below the
- this end of the bolt 3 can be brought very close to the sensor element 2, approximately to less than 1 mm.
- the bolt 3 is held in Fig. 4 again in a sleeve 4, whose length is about half the length of the bolt 3.
- the sleeve 4 is made in one piece with the housing of the stator 6 and was made by injection molding of plastic. In these embodiments, the bolt 3 is made
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA50766/2013A AT515170A3 (de) | 2013-11-19 | 2013-11-19 | Elektrische Maschine mit einer Sensoreinrichtung zur Rotorlageerkennung |
| PCT/EP2014/074267 WO2015074914A2 (de) | 2013-11-19 | 2014-11-11 | Elektrische maschine mit einer sensoreinrichtung zur rotorlageerkennung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3072221A2 true EP3072221A2 (de) | 2016-09-28 |
Family
ID=51945848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14801971.4A Ceased EP3072221A2 (de) | 2013-11-19 | 2014-11-11 | Elektrische maschine mit einer sensoreinrichtung zur rotorlageerkennung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3072221A2 (de) |
| AT (1) | AT515170A3 (de) |
| WO (1) | WO2015074914A2 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3403320B1 (de) | 2016-01-13 | 2020-03-04 | Pierburg Pump Technology GmbH | Fluidpumpe für ein elektrisches automobil |
| CN111317404B (zh) * | 2018-12-13 | 2021-08-06 | 美智纵横科技有限责任公司 | 滚轮转动检测组件及其清洁机器人 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU7543600A (en) * | 1999-10-08 | 2001-04-23 | Nmb (Uk) Limited | An external rotor brushless dc motor |
| FR2807877B1 (fr) * | 2000-04-14 | 2002-10-31 | Meritor Light Vehicle Sys Ltd | Connecteur a concentrateur de flux pour moteur electrique |
| DE10357346A1 (de) * | 2003-12-09 | 2005-07-07 | Robert Bosch Gmbh | Elektrische Maschine |
| DE102007060241A1 (de) | 2007-12-14 | 2009-06-25 | Robert Bosch Gmbh | Elektrische Maschine mit einer Sensoreinrichtung zur Rotorlageerkennung |
| EP2450575A1 (de) * | 2010-11-05 | 2012-05-09 | Pierburg Pump Technology GmbH | Elektromotorische Kfz-Flüssigkeits-Förderpumpe |
-
2013
- 2013-11-19 AT ATA50766/2013A patent/AT515170A3/de unknown
-
2014
- 2014-11-11 EP EP14801971.4A patent/EP3072221A2/de not_active Ceased
- 2014-11-11 WO PCT/EP2014/074267 patent/WO2015074914A2/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2015074914A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015074914A2 (de) | 2015-05-28 |
| AT515170A2 (de) | 2015-06-15 |
| AT515170A3 (de) | 2018-01-15 |
| WO2015074914A3 (de) | 2016-03-31 |
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Legal Events
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
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| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17Q | First examination report despatched |
Effective date: 20171208 |
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| REG | Reference to a national code |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18R | Application refused |
Effective date: 20191213 |