WO2023186329A1 - Automotive secondary electric device - Google Patents

Automotive secondary electric device Download PDF

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Publication number
WO2023186329A1
WO2023186329A1 PCT/EP2022/058798 EP2022058798W WO2023186329A1 WO 2023186329 A1 WO2023186329 A1 WO 2023186329A1 EP 2022058798 W EP2022058798 W EP 2022058798W WO 2023186329 A1 WO2023186329 A1 WO 2023186329A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
stator
electric device
motor rotor
secondary electric
Prior art date
Application number
PCT/EP2022/058798
Other languages
French (fr)
Inventor
Frank Bürger
Eduard HÖRNER
Richard BEUTLER
Original Assignee
Pierburg Pump Technology 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 Pierburg Pump Technology Gmbh filed Critical Pierburg Pump Technology Gmbh
Priority to PCT/EP2022/058798 priority Critical patent/WO2023186329A1/en
Publication of WO2023186329A1 publication Critical patent/WO2023186329A1/en

Links

Classifications

    • 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
    • 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
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
    • 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
    • H02K11/27—Devices for sensing current, or actuated thereby

Definitions

  • the invention refers to an automotive secondary electric device, preferably to an electric automotive liquid pump.
  • An automotive secondary electric device for example an electric fluid pump, comprises a functional means, for example a pumping arrangement for pumping a pumping fluid from a pump inlet to a pump outlet, and comprises an electric motor for driving the pump rotor of the pumping arrangement.
  • the electric motor is designed as a brushless electric motor comprising a permanently magnetized motor rotor which is electromagnetically driven by a motor stator with several stator coils which are energized by a motor electronics. This motor concept allows to flu id ically separate the wet motor part from the dry motor part without any shaft sealings and is therefore suitable but not restricted to fluidic applicaions.
  • the motor electronics comprises a power semiconductor unit for electrically driving the stator coils and comprises a commutation unit controlling the power semiconductor unit.
  • the commutation unit needs a precise information about the rotational motor rotor position so that a motor position sensor arrangement is provided to detect the rotational motor rotor position.
  • US 10 069 383 A2 discloses an electronically commutated electric motor, wherein the motor rotor position is determined by a simple magnetic field sensor which directly detects the magnetic field of the motor rotor. For providing a precise motor rotor position detection, an additional field guiding plate is provided at the axial end of the motor rotor.
  • WO 2013/072 219 Al discloses a motor position detection arrangement comprising a three-axis magnetic field sensor detecting the magnetic field of a separate sensor magnet at the motor rotor.
  • the automotive secondary electric device is provided with a brushless electric synchronous motor comprising a permanently magnetized motor rotor, a motor stator with at least one but preferably with several stator coils, and a motor electronics for energizing the at least one stator coil.
  • the motor electronics comprises a commutation unit and a power semiconductor unit electrically supplying the stator coils and being controlled by the commutation unit.
  • the electric automotive fluid pump is provided with a static multi-axis magnetic field sensor being arranged eccentrically referring to the motor rotor and being arranged axially adjacent to the motor rotor.
  • the magnetic field sensor is preferably provided in the dry motor section of a canned motor.
  • the multi-axis magnetic field sensor detects the magnitude and the two-dimensional or the spatial orientation of the magnetic field of the motor rotor and generates a corresponding multi-axis sensor signal.
  • no separate sensor magnet is provided at the motor rotor.
  • the magnetic field sensor therefore detects the magnetic field of the propulsion-related permanent magnets of the motor rotor and of the magnetic field generated by the electromagnetic motor stator. No additional separate sensor magnet is provided at the motor rotor.
  • the multi-axis magnetic field sensor precisely detects the magnitude and the two- or three-dimensional orientation of the magnetic field generated by the motor rotor which allows a very precise and continuous detection and determination of the exact rotational motor rotor position.
  • the exact rotational motor rotor position detection allows a very precise and perfectly load-adapted commutation and control of the electric energizing of motor stator coils so that a reliable operation of the electric automotive fluid pump even under extreme conditions is guaranteed even at, for example, very low environmental temperatures causing a very high pumping fluid viscosity.
  • the sensor is preferebly a three-axis sensor which can be programmed to detect the magnetic field in any sensing plane which is the best plane to detect the rotor field.
  • the sensing plane of the sensor is preferebly not in the base plane of the multi-axis sensor but is inclined with respect to the sensor's base plane in a non-90° angle.
  • the center of the multi-axis magnetic field sensor is radially positioned approximately at the outside radius of the motor rotor, preferably within a range of between 80% and 120% of the motor rotor radius.
  • the center axis of the magnetic field sensor is orientated substantially axially and is positioned in a radius between 80% and 120% of the nominal motor rotor radius.
  • the aerial magnetic field caused by the permanent magnets of the motor rotor is relatively strong in this area so that the signal to noise ratio is relatively high which directly effects the quality and the precision of the motor rotor position detection and determination.
  • a multi-axis stator-field filter is provided for filtering the statorfield-caused fractions of the multi-axis sensor signal.
  • the stator-field filter separates the motor-rotor-caused signal fraction from the motor-stator- caused signal fraction of the multi-axis raw sensor signal.
  • the rotor-caused signal fraction is sent to and received by the commutation unit.
  • a coil current detector unit which receives the motor-stator-caused signal fraction from the stator-field filter and which generates an electric coil current signal which is substantially proportional to the electric current flowing through the corresponding stator coil.
  • the electric motor is preferably a canned motor with a wet motor section including the motor rotor and with a dry motor section including the motor electronics and the motor stator.
  • the canned electric motor has no shaft sealing.
  • the automotive secondary electric device is provided with a pumping arrangement for pumping a pumping fluid, preferably a liquid, from a pump fluid inlet to a pump fluid outlet.
  • the pumping arrangement is a positive displacement pumping arrangement for generating a high fluid outlet pressure.
  • the pumping arrangement is a lubricant pumping arrangement so that the electric automotive fluid pump is an electric automotive lubricant pump.
  • a typical automotive lubricant has a wide range of viscosity over the automotive-typical lubricant temperature range of -40°C to 140°C. The wide range of lubricant viscosity makes it necessary to realize a high accuracy in the motor position detection to guarantee a reliable fluid pump operation.
  • figure 1 shows schematically an electric automotive fluid pump with a pumping arrangement and an electric motor including a multi-axis magnetic field sensor and a motor electronics
  • figure 2 shows schematically a longitudinal section of the electric motor of figure 1.
  • the automotive secondary electric device 10 is provided with a pumping arrangement 94 pumping the pumping fluid, which is a liquid lubricant, from a pump fluid inlet 96 to a pump fluid outlet 97.
  • the automotive secondary electric device 10 is a positive displacement pump and is provided with a pump rotor 92 with several rotor vanes 94 separating several rotating pumping compartments.
  • the automotive secondary electric device 10 is provided with a brushless synchronous canned electric motor 12 comprising a permanently magnetized motor rotor 30, a motor stator 20 with six stator coils 26 and a motor electronics 40 for electrically energizing the stator coils 26.
  • the electric motor 12 is a so-called canned motor with a separating can 60 separating a wet motor section with the motor rotor 30 from a dry motor section with the motor stator 20.
  • the motor rotor 30 rotates around a longitudinal rotor axis 31 and comprises a ferromagnetic rotor body 32 with four embedded permanent magnets 34 defining in total four magnetic rotor poles.
  • the motor rotor 30 has an outer radius R. of, for example, 50 mm.
  • the three-phase motor stator 20 comprises a ferromagnetic stator body 22 defining six stator poles 24. Every stator pole 26 of the stator body 22 is provided with a corresponding stator coil 26 arranged in three phases.
  • the motor electronics 40 comprises a power semiconductor unit 42, a commutation unit 46, a three-axis stator-field filter 48 and a coil current detector unit 49.
  • a static multi-axis magnetic field sensor 50 is arranged eccentrically and axially adjacent with an axial distance of less than 10 mm to the motor rotor 30.
  • the field sensor 50 is a programmable three-axis sensor which is programmed to generate a two-dimensional signal in a suitable sensing plane which is not lying in the base plane or any plane in precisely 90° to the base plane of the sensor 50.
  • the eccentricity relative to the rotor axis 31 of the magnetic field sensor 50 is substantially equal to the outer motor rotor radius R.
  • the magnetic field sensor 50 sees and detects the electromagnetic field generated by the permanent magnets 34 of the motor rotor 30 and generated by the stator coils 26.
  • the electromagnetic fields generated by the permanently magnetized motor rotor 30 and by the motor stator 26 are superposed so that the magnetic field sensor 50 detects the summation field of both electromagnetic fields.
  • the motor electronics 40 is provided with a printed circuit board 40', whereas the power semiconductors defining the power semiconductor unit 42 and the magnetic field sensor 50 are provided at the proximal side of the printed circuit board 40'.
  • the electric motor 12 When the automotive secondary electric device 10 is active, the electric motor 12 is driven by the motor electronics 40 so that the motor rotor 30 rotates.
  • the multi-axis sensor signal generated by the multi-axis magnetic field sensor 50 is first filtered in a stator-field filter 48 which filter 48 separates the stator-field-caused fraction of the multi-axis sensor signal from the rotor-field-caused fraction directly sent to the commutation unit 46.
  • the filter 48 uses FFT- and pattern-recognition-techniques to separate the step-like structured course of the stator field from the course of the rotor field.
  • the stator-field-caused fraction of the sensor signal is received by a coil current detector unit 49 which current detector unit 49 evaluates the stator-field fraction and sends a coil-current signal indicating a total coil current value to the commutation unit 46.
  • the rotor-field-caused fraction of the sensor signal is directly received by a rotor position evaluation module 44 which evaluates the complex rotor-field caused signal fraction to precisely determine the rotational rotor position of the motor rotor 30.
  • the rotational rotor position of the motor rotor 30 is used by the commutation unit 46 to precisely control the electric power output of the three-phase power semiconductor unit 42.

Abstract

The invention refers to an automotive secondary electric device (10) with a brushless electric motor (12) comprising a permanently magnetized motor rotor (30), a motor stator (20) with at least one stator coil (26) and a motor electronics (40) for energizing the at least one stator coil (26), the motor electronics (40) comprising a commutation unit (46) and a power semiconductor unit (42) electrically driving the stator coils (26) and being controlled by the commutation unit (46), and a static multi-axis magnetic field sensor (50) being arranged eccentrically and axially adjacent to the motor rotor (30), detecting the magnitude and the two-dimensional or the three-dimensional orientation of the magnetic field of the motor rotor (30), and generating a corresponding sensor signal. The multi-axis magnetic field sensor allows to precisely detect the motor rotor position.

Description

D E S C R I P T I O N
Automotive secondary electric device
The invention refers to an automotive secondary electric device, preferably to an electric automotive liquid pump.
An automotive secondary electric device, for example an electric fluid pump, comprises a functional means, for example a pumping arrangement for pumping a pumping fluid from a pump inlet to a pump outlet, and comprises an electric motor for driving the pump rotor of the pumping arrangement. The electric motor is designed as a brushless electric motor comprising a permanently magnetized motor rotor which is electromagnetically driven by a motor stator with several stator coils which are energized by a motor electronics. This motor concept allows to flu id ically separate the wet motor part from the dry motor part without any shaft sealings and is therefore suitable but not restricted to fluidic applicaions.
The motor electronics comprises a power semiconductor unit for electrically driving the stator coils and comprises a commutation unit controlling the power semiconductor unit. The commutation unit needs a precise information about the rotational motor rotor position so that a motor position sensor arrangement is provided to detect the rotational motor rotor position.
US 10 069 383 A2 discloses an electronically commutated electric motor, wherein the motor rotor position is determined by a simple magnetic field sensor which directly detects the magnetic field of the motor rotor. For providing a precise motor rotor position detection, an additional field guiding plate is provided at the axial end of the motor rotor.
WO 2013/072 219 Al discloses a motor position detection arrangement comprising a three-axis magnetic field sensor detecting the magnetic field of a separate sensor magnet at the motor rotor.
It is an object of the invention to provide an automotive secondary electric device with a simple and precise motor rotor position detection means.
This object is solved with an automotive secondary electric device with the features of main claim 1.
The automotive secondary electric device is provided with a brushless electric synchronous motor comprising a permanently magnetized motor rotor, a motor stator with at least one but preferably with several stator coils, and a motor electronics for energizing the at least one stator coil.
The motor electronics comprises a commutation unit and a power semiconductor unit electrically supplying the stator coils and being controlled by the commutation unit. The electric automotive fluid pump is provided with a static multi-axis magnetic field sensor being arranged eccentrically referring to the motor rotor and being arranged axially adjacent to the motor rotor.
The magnetic field sensor is preferably provided in the dry motor section of a canned motor. The multi-axis magnetic field sensor detects the magnitude and the two-dimensional or the spatial orientation of the magnetic field of the motor rotor and generates a corresponding multi-axis sensor signal. Preferably, no separate sensor magnet is provided at the motor rotor. The magnetic field sensor therefore detects the magnetic field of the propulsion-related permanent magnets of the motor rotor and of the magnetic field generated by the electromagnetic motor stator. No additional separate sensor magnet is provided at the motor rotor.
The multi-axis magnetic field sensor precisely detects the magnitude and the two- or three-dimensional orientation of the magnetic field generated by the motor rotor which allows a very precise and continuous detection and determination of the exact rotational motor rotor position. The exact rotational motor rotor position detection allows a very precise and perfectly load-adapted commutation and control of the electric energizing of motor stator coils so that a reliable operation of the electric automotive fluid pump even under extreme conditions is guaranteed even at, for example, very low environmental temperatures causing a very high pumping fluid viscosity. The sensor is preferebly a three-axis sensor which can be programmed to detect the magnetic field in any sensing plane which is the best plane to detect the rotor field. The sensing plane of the sensor is preferebly not in the base plane of the multi-axis sensor but is inclined with respect to the sensor's base plane in a non-90° angle.
Preferably, the center of the multi-axis magnetic field sensor is radially positioned approximately at the outside radius of the motor rotor, preferably within a range of between 80% and 120% of the motor rotor radius. The center axis of the magnetic field sensor is orientated substantially axially and is positioned in a radius between 80% and 120% of the nominal motor rotor radius. The aerial magnetic field caused by the permanent magnets of the motor rotor is relatively strong in this area so that the signal to noise ratio is relatively high which directly effects the quality and the precision of the motor rotor position detection and determination. Preferably, a multi-axis stator-field filter is provided for filtering the statorfield-caused fractions of the multi-axis sensor signal. The stator-field filter separates the motor-rotor-caused signal fraction from the motor-stator- caused signal fraction of the multi-axis raw sensor signal. The rotor-caused signal fraction is sent to and received by the commutation unit.
More preferably, a coil current detector unit is provided which receives the motor-stator-caused signal fraction from the stator-field filter and which generates an electric coil current signal which is substantially proportional to the electric current flowing through the corresponding stator coil. As a result, a separate discrete stator coil current detection means is not necessary anymore so that the motor stator current sensing can be realized without any shunt resistor etc.
The electric motor is preferably a canned motor with a wet motor section including the motor rotor and with a dry motor section including the motor electronics and the motor stator. Preferably, the canned electric motor has no shaft sealing.
Preferably the automotive secondary electric device according to the invention is provided with a pumping arrangement for pumping a pumping fluid, preferably a liquid, from a pump fluid inlet to a pump fluid outlet. Preferably, the pumping arrangement is a positive displacement pumping arrangement for generating a high fluid outlet pressure. Preferably, the pumping arrangement is a lubricant pumping arrangement so that the electric automotive fluid pump is an electric automotive lubricant pump. A typical automotive lubricant has a wide range of viscosity over the automotive-typical lubricant temperature range of -40°C to 140°C. The wide range of lubricant viscosity makes it necessary to realize a high accuracy in the motor position detection to guarantee a reliable fluid pump operation. One embodiment of the invention is described with reference to the enclosed drawings, wherein figure 1 shows schematically an electric automotive fluid pump with a pumping arrangement and an electric motor including a multi-axis magnetic field sensor and a motor electronics, and figure 2 shows schematically a longitudinal section of the electric motor of figure 1.
The figures schematically show an automotive secondary electric device 10 which is, in this embodiment, a lubricant pump. The automotive secondary electric device 10 is provided with a pumping arrangement 94 pumping the pumping fluid, which is a liquid lubricant, from a pump fluid inlet 96 to a pump fluid outlet 97. The automotive secondary electric device 10 is a positive displacement pump and is provided with a pump rotor 92 with several rotor vanes 94 separating several rotating pumping compartments.
The automotive secondary electric device 10 is provided with a brushless synchronous canned electric motor 12 comprising a permanently magnetized motor rotor 30, a motor stator 20 with six stator coils 26 and a motor electronics 40 for electrically energizing the stator coils 26. The electric motor 12 is a so-called canned motor with a separating can 60 separating a wet motor section with the motor rotor 30 from a dry motor section with the motor stator 20.
The motor rotor 30 rotates around a longitudinal rotor axis 31 and comprises a ferromagnetic rotor body 32 with four embedded permanent magnets 34 defining in total four magnetic rotor poles. The motor rotor 30 has an outer radius R. of, for example, 50 mm. The three-phase motor stator 20 comprises a ferromagnetic stator body 22 defining six stator poles 24. Every stator pole 26 of the stator body 22 is provided with a corresponding stator coil 26 arranged in three phases.
The motor electronics 40 comprises a power semiconductor unit 42, a commutation unit 46, a three-axis stator-field filter 48 and a coil current detector unit 49. As shown in the figures, a static multi-axis magnetic field sensor 50 is arranged eccentrically and axially adjacent with an axial distance of less than 10 mm to the motor rotor 30. The field sensor 50 is a programmable three-axis sensor which is programmed to generate a two-dimensional signal in a suitable sensing plane which is not lying in the base plane or any plane in precisely 90° to the base plane of the sensor 50. The eccentricity relative to the rotor axis 31 of the magnetic field sensor 50 is substantially equal to the outer motor rotor radius R. The magnetic field sensor 50 sees and detects the electromagnetic field generated by the permanent magnets 34 of the motor rotor 30 and generated by the stator coils 26. The electromagnetic fields generated by the permanently magnetized motor rotor 30 and by the motor stator 26 are superposed so that the magnetic field sensor 50 detects the summation field of both electromagnetic fields.
As shown in figure 2, the motor electronics 40 is provided with a printed circuit board 40', whereas the power semiconductors defining the power semiconductor unit 42 and the magnetic field sensor 50 are provided at the proximal side of the printed circuit board 40'.
When the automotive secondary electric device 10 is active, the electric motor 12 is driven by the motor electronics 40 so that the motor rotor 30 rotates. The multi-axis sensor signal generated by the multi-axis magnetic field sensor 50 is first filtered in a stator-field filter 48 which filter 48 separates the stator-field-caused fraction of the multi-axis sensor signal from the rotor-field-caused fraction directly sent to the commutation unit 46. The filter 48 uses FFT- and pattern-recognition-techniques to separate the step-like structured course of the stator field from the course of the rotor field.
The stator-field-caused fraction of the sensor signal is received by a coil current detector unit 49 which current detector unit 49 evaluates the stator-field fraction and sends a coil-current signal indicating a total coil current value to the commutation unit 46. The rotor-field-caused fraction of the sensor signal is directly received by a rotor position evaluation module 44 which evaluates the complex rotor-field caused signal fraction to precisely determine the rotational rotor position of the motor rotor 30. The rotational rotor position of the motor rotor 30 is used by the commutation unit 46 to precisely control the electric power output of the three-phase power semiconductor unit 42.

Claims

C L A I M S An automotive secondary electric device (10) with a brushless electric motor (12) comprising a permanently magnetized motor rotor (30), a motor stator (20) with at least one stator coil (26) and a motor electronics (40) for energizing the at least one stator coil (26), the motor electronics (40) comprising a commutation unit (46) and a power semiconductor unit (42) electrically driving the stator coils (26) and being controlled by the commutation unit (46), and a static multi-axis magnetic field sensor (50) being arranged eccentrically and axially adjacent to the motor rotor (30), detecting the magnitude and the two-dimensional or the three-dimensional orientation of the magnetic field of the motor rotor (30) and generating a corresponding two- or three-axis sensor signal. The automotive secondary electric device (10) of claim 1, wherein the center of the multi-axis magnetic field sensor (50) is radially positioned approximately at the outside radius (R) of the motor rotor (30), preferably within a range of between 80% and 120% of the motor rotor radius (R). The automotive secondary electric device (10) of one of the preceding claims, wherein a multi-axis stator-field filter (48) is provided for filtering the stator-field-caused fraction of the sensor signal. The automotive secondary electric device (10) of the preceding claim, wherein the stator-field-caused fraction of the sensor signal is processed in a current detector unit (49) to generate an electric coil current signal (I). The automotive secondary electric device (10) of one of the preceding claims, comprising a pumping arrangement (90) for pumping a pumping fluid from a pump inlet (96) to a pump outlet (97). The automotive secondary electric device (10) of one of the preceding claims, wherein the pumping arrangement (90) is a positive displacement pumping arrangement. The automotive secondary electric device (10) of the preceding claim, wherein the pumping arrangement (90) is a lubricant pumping arrangement. The automotive secondary electric device (10) of one of the preceding claims, wherein no separate sensor magnet is provided at the motor rotor (30).
PCT/EP2022/058798 2022-04-01 2022-04-01 Automotive secondary electric device WO2023186329A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2022/058798 WO2023186329A1 (en) 2022-04-01 2022-04-01 Automotive secondary electric device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2022/058798 WO2023186329A1 (en) 2022-04-01 2022-04-01 Automotive secondary electric device

Publications (1)

Publication Number Publication Date
WO2023186329A1 true WO2023186329A1 (en) 2023-10-05

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003001216A1 (en) * 2001-06-22 2003-01-03 Minebea Co., Ltd. Device for generation of a signal dependent on rotational speed for an electric motor, in particular for an electronically-commutated d.c. motor
JP2005073325A (en) * 2003-08-21 2005-03-17 Matsushita Electric Ind Co Ltd Dc canned pump
EP1580434A1 (en) * 2004-03-26 2005-09-28 Minebea Co., Ltd. Electric pump
WO2013072219A2 (en) 2011-11-15 2013-05-23 Robert Bosch Gmbh Control module for a drive motor
GB2506719A (en) * 2013-06-26 2014-04-09 Protean Electric Ltd A control module for an electric motor or generator
WO2017096380A1 (en) * 2015-12-04 2017-06-08 Texas Instruments Incorporated Linear hall device based field oriented control motor drive system
US10069383B2 (en) 2015-03-25 2018-09-04 Lakeview Innovation Ltd. Electronically commuted electric motor with direct sampling of the magnetic field of the rotor
CN110417191A (en) * 2019-07-24 2019-11-05 桂林智神信息技术股份有限公司 Obtain the method and device of the mechanical location of auxiliary capture apparatus motor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003001216A1 (en) * 2001-06-22 2003-01-03 Minebea Co., Ltd. Device for generation of a signal dependent on rotational speed for an electric motor, in particular for an electronically-commutated d.c. motor
JP2005073325A (en) * 2003-08-21 2005-03-17 Matsushita Electric Ind Co Ltd Dc canned pump
EP1580434A1 (en) * 2004-03-26 2005-09-28 Minebea Co., Ltd. Electric pump
WO2013072219A2 (en) 2011-11-15 2013-05-23 Robert Bosch Gmbh Control module for a drive motor
GB2506719A (en) * 2013-06-26 2014-04-09 Protean Electric Ltd A control module for an electric motor or generator
US10069383B2 (en) 2015-03-25 2018-09-04 Lakeview Innovation Ltd. Electronically commuted electric motor with direct sampling of the magnetic field of the rotor
WO2017096380A1 (en) * 2015-12-04 2017-06-08 Texas Instruments Incorporated Linear hall device based field oriented control motor drive system
CN110417191A (en) * 2019-07-24 2019-11-05 桂林智神信息技术股份有限公司 Obtain the method and device of the mechanical location of auxiliary capture apparatus motor

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