WO2016042607A1 - 電動パワーステアリング装置 - Google Patents
電動パワーステアリング装置 Download PDFInfo
- Publication number
- WO2016042607A1 WO2016042607A1 PCT/JP2014/074482 JP2014074482W WO2016042607A1 WO 2016042607 A1 WO2016042607 A1 WO 2016042607A1 JP 2014074482 W JP2014074482 W JP 2014074482W WO 2016042607 A1 WO2016042607 A1 WO 2016042607A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotation angle
- electric power
- angle
- power steering
- angle detection
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/0481—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures
- B62D5/0484—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures for reaction to failures, e.g. limp home
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/046—Controlling the motor
- B62D5/0463—Controlling the motor calculating assisting torque from the motor based on driver input
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/0481—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures
- B62D5/0487—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures detecting motor faults
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/0481—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures
- B62D5/049—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures detecting sensor failures
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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
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
- H02P6/085—Arrangements for controlling the speed or torque of a single motor in a bridge configuration
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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
- H02P6/12—Monitoring commutation; Providing indication of commutation failure
-
- 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
Definitions
- the present invention relates to an electric power steering apparatus that performs PWM control of a brushless motor by an inverter based on a current command value, performs current control by detecting a rotation angle of the brushless motor, and performs assist control of a steering system.
- the rotation angle of the brushless motor is detected by the three rotation angle detection systems, and the normal / abnormality (including failure) of each system is diagnosed.
- the present invention relates to a highly reliable electric power steering apparatus in which assist control is continued using a detection angle of the rotation angle detection system.
- An electric power steering apparatus that applies a steering assist force (assist force) to a vehicle steering mechanism by a rotational force of a motor is provided with a steering shaft or a rack shaft by a transmission mechanism such as a gear or a belt via a speed reduction mechanism.
- a steering assist force is applied to the vehicle.
- Such a conventional electric power steering device (EPS) performs feedback control of the motor current in order to accurately generate the torque of the steering assist force.
- the motor applied voltage is adjusted so that the difference between the steering assist command value (current command value) and the motor current detection value is small.
- the adjustment of the motor applied voltage is generally performed by PWM (pulse width). This is done by adjusting the duty of modulation) control.
- a column shaft (steering shaft, handle shaft) 2 of a handle 1 is a reduction gear 3, universal joints 4a and 4b, a pinion rack mechanism 5, a tie rod 6a, 6b is further connected to the steering wheels 8L and 8R via hub units 7a and 7b. Further, the column shaft 2 is provided with a torque sensor 10 for detecting the steering torque of the handle 1 and a steering angle sensor 14 for detecting the steering angle ⁇ , and the motor 20 for assisting the steering force of the handle 1 is provided with the reduction gear 3.
- the control unit (ECU) 30 that controls the electric power steering apparatus is supplied with electric power from the battery 13 and also receives an ignition key signal via the ignition key 11.
- the control unit 30 calculates a current command value of an assist (steering assistance) command based on the steering torque Th detected by the torque sensor 10 and the vehicle speed Vel detected by the vehicle speed sensor 12, and compensates the current command value.
- the current supplied to the motor 20 is controlled by the voltage control command value Vref subjected to.
- the steering angle sensor 14 is not essential and may not be arranged.
- the control unit 30 is connected to a CAN (Controller Area Network) 50 that transmits and receives various types of vehicle information, and the vehicle speed Vel can also be received from the CAN 50.
- the control unit 30 is also connected to a non-CAN 51 that exchanges communications other than the CAN 50, analog / digital signals, radio waves, and the like.
- the control unit 30 is mainly composed of a CPU (including MCU, MPU, etc.), and general functions executed by programs in the CPU are as shown in FIG.
- the function and operation of the control unit 30 will be described with reference to FIG. 2.
- the steering torque Th detected by the torque sensor 10 and the vehicle speed Vel detected by the vehicle speed sensor 12 (or from the CAN 50) are expressed as a current command value Iref1.
- the current command value calculation unit 31 to be calculated is input.
- the current command value calculation unit 31 calculates a current command value Iref1, which is a control target value of the current supplied to the motor 20, using an assist map or the like based on the input steering torque Th and vehicle speed Vel.
- the current command value Iref1 is input to the current limiter 33 through the adder 32A, and the current command value Irefm whose maximum current is limited is input to the subtractor 32B, and the deviation I (Irefm) from the fed back motor current value Im.
- the inverter circuit 37 uses an FET as a drive element, and is configured by an FET bridge circuit.
- the motor 20 when the motor 20 is a brushless motor, it is necessary to apply a current to the motor coil in accordance with the rotation angle of the motor, and therefore a rotation sensor 21 using a resolver or a magnetoresistive element (MR sensor) is required. Become.
- the output signal of the rotation sensor 21 is input to the angle detection circuit 22 and processed.
- the angle detection circuit 22 detects the rotation angle ⁇ , and the angular velocity calculation unit 23 calculates the motor angular velocity ⁇ .
- a compensation signal CM from the compensation signal generator 34 is added to the adder 32A, and the compensation of the steering system system is performed by adding the compensation signal CM to improve the convergence and inertia characteristics.
- the compensation signal generation unit 34 adds the self-aligning torque (SAT) 343 and the inertia 342 by the addition unit 344, and further adds the convergence 341 to the addition result by the addition unit 345, and compensates the addition result of the addition unit 345.
- the signal CM is used.
- Patent Document 1 discloses a brushless motor control method in which redundancy is provided and reliability is improved.
- the first sensor group is composed of a plurality of hall sensors, and detects the magnetism of the rotor magnet to detect the rotor rotational position
- the first sensor group is composed of a plurality of hall sensors arranged on the hall sensor at intervals of a deviation angle.
- the Hall sensor operates normally, the overlap energization control is performed using both sensor groups. If the Hall sensor fails, the sensor group that does not include the failure sensor is used. The rectangular wave control is implemented.
- abnormality detection by the comparison of duplication, there is a lack of abnormality detection means when assist control is continued using a rotation sensor of a normal system after a failure of one system, and a highly reliable motor Control cannot be performed. For this reason, in the electric power steering apparatus, means for stopping the assist control after a failure of one system is adopted, and it is a problem that the driver is burdened.
- the present invention has been made under the circumstances as described above, and an object of the present invention is to use three rotation angle detection systems and to detect abnormality (including failure) by majority of three detection signals and to detect rotation angle.
- the present invention calculates a current command value based on at least the steering torque, performs PWM control of the brushless motor by an inverter based on the current command value, performs current control by detecting the rotation angle of the brushless motor, and performs steering.
- the above-described object of the present invention relates to an electric power steering apparatus configured to perform assist control of the system, and includes three rotation angle detection systems that detect the rotation angle of the brushless motor and the three rotation angle detection systems.
- An angle diagnosis unit that compares the absolute value of each output difference with a threshold value to diagnose and process normality / abnormality of the rotation angle detection system, and is diagnosed as normal by the angle diagnosis unit This is achieved by continuing the assist control using the output angle of the system.
- the object of the present invention is that the angle diagnosis unit diagnoses normal when the absolute value of each angle difference is smaller than the threshold value, and diagnoses abnormality when the absolute value of the angle difference is equal to or greater than the threshold value. Or when the absolute value of each angle difference is smaller than the threshold value, any one of the three systems is output as an output angle, or one of the absolute values of each angle difference is When the threshold value is smaller than the threshold, the assist control is continued using the normal two system output angles other than the system diagnosed as abnormal, or the normal two system output angles are diagnosed. By continuing or when the system that diagnoses the abnormality is 2 or more, the assist control is stopped or the sensorless drive is performed, so that Results to be achieved.
- the rotation angle detection system has three systems, and abnormality (including failure) is detected by the majority of the three detection signals, and any of the rotation angle detection systems becomes abnormal.
- the abnormal system can be identified instantaneously, and the assist control can be continued by performing highly reliable angle detection using the remaining normal angle detection signals. Since mutual monitoring is possible in the two systems even after the first system abnormality occurs, there is an advantage that the possibility of stopping the assist control is reduced even after the single abnormality occurs. Therefore, the load burden on the driver is reduced.
- the rotation angle of the brushless motor is detected by three rotation angle detection systems, and the normal / abnormality (including failure) of each system is diagnosed by majority decision.
- This is a highly reliable electric power steering device in which the assist control is continued using the output angles of the other two rotation angle detection systems.
- Three rotation angle detection systems are used to detect abnormalities (including faults) by majority of the three detection signals, and even if one of the rotation angle detection systems becomes abnormal, the abnormal system can be instantly identified and the remaining normal Assist control can be continued by performing highly reliable angle detection using a simple angle detection signal.
- the rotation sensor used in the present invention is a resolver, MR sensor, etc., and the angle signal from each system is assumed to be a digital output such as a SENT communication standard or an analog output corresponding to the angle value.
- FIG. 3 shows a configuration example of the present invention corresponding to FIG. 2.
- the brushless motor 20 includes rotation sensors 101, 102, 103 such as a resolver and an MR sensor connected in three systems.
- Reference numerals 102, 103 are connected to angle detection circuits 111, 112, 113 for processing signals, respectively, and the detected rotation angles ⁇ a, ⁇ b, ⁇ c are output from the angle detection circuits 111, 112, 113.
- the rotation sensor 101 and the angle detection circuit 111 constitute an a-system rotation angle detection system
- the rotation sensor 102 and the angle detection circuit 112 constitute a b-system rotation angle detection system
- the rotation sensor 103 and the angle detection circuit 113 constitute a c
- a system rotation angle detection system is configured, and a total of three system rotation angle detection systems are configured.
- the detected rotation angles ⁇ a to ⁇ c from the angle detection circuits 111 to 113 are input to the angle diagnosis unit 100, and a threshold value ⁇ th for abnormality determination is also input to the angle diagnosis unit 100.
- the angle diagnosis unit 100 diagnoses the normality / abnormality (including failure) of the three rotation angle detection systems based on the input detection angles ⁇ a to ⁇ c and the threshold value ⁇ th, and stops the rotation angle ⁇ , assist control, or sensorless drive
- An abnormal signal AS for performing is output.
- the angle diagnosis unit 100 is configured as shown in FIG. 4, the detection angle ⁇ a is input to the difference calculation units 121 and 123, the detection angle ⁇ b is input to the difference calculation units 121 and 122, and the detection angle ⁇ c is the difference calculation. Input to the sections 122 and 123.
- a predetermined threshold value ⁇ th is input to the comparison units 141 to 143, and the comparison units 141 to 143 respectively compare the absolute values D1 to D3 with the threshold value ⁇ th, and normal / abnormal determination results DS1 to DS3 are determined by the determination unit 120. Is input. Detection rotation angles ⁇ a to ⁇ c are also input to the determination unit 120.
- the determination unit 120 outputs the angle ⁇ based on the determination results DS1 to DS3, or outputs an abnormal signal AS for assist stop or sensorless driving. Output.
- the rotation sensors 101 to 103 are rotated at the same time, and the rotation angles ⁇ a to ⁇ c are detected by the angle detection circuits 111 to 113 (step S1).
- the rotation angle ⁇ b is input to the difference calculation units 121 and 122
- the rotation angle ⁇ c is input to the difference calculation units 122 and 123, and the following angle diagnosis is performed.
- the comparison units 141 to 143 compare the absolute values D1 to D3 with the threshold value ⁇ th, and input the determination results DS1 to DS3 to the determination unit 120.
- the comparisons of the comparison units 141 to 143 are whether or not
- the determination unit 120 determines whether two or more of
- ⁇ th are satisfied based on the input determination results DS1 to DS3.
- Step S3 If two or more are satisfied, the three rotation angle detection systems are normal (Step S4), and the detection angles ⁇ a to ⁇ c of any of the systems are output as the rotation angle ⁇ . (Step S5), thereby continuing the assist control (Step S6).
- step S10 it is first determined whether or not there is only one expression. If it is determined that there is only one expression (Yes), it is first determined whether or not only
- step S11 it is determined whether or not only
- step S20 it is determined whether or not only
- the order of the comparison determination is arbitrary and can be changed as appropriate.
- the assist control is continued using one of the rotation angles of the normal system, and the abnormality is compared with the detected value of the other normal system. Is detected.
- the abnormality signal AS is output and the assist control is stopped, or Japanese Patent Application Laid-Open No. 2011-244678.
- the sensorless drive as disclosed in Japanese Patent Publication (Patent Document 2) is performed (step S30).
- a torque command value to be applied to the drive target is set, and an addition angle is set to zero the deviation between the detected torque and the torque command value.
- the motor torque is controlled so that a torque according to the torque command value is applied to the object to be driven, and the motor torque corresponds to the coordinate axis of the rotating coordinate system according to the magnetic pole direction of the rotor. This corresponds to the load angle, which is the amount of deviation from the virtual axis.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
- Power Steering Mechanism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
2 コラム軸(ステアリングシャフト、ハンドル軸)
10 トルクセンサ
12 車速センサ
14 舵角センサ
20 モータ(ブラシレスモータ)
30 コントロールユニット(ECU)
31 電流指令値演算部
33 電流制限部
34 補償信号生成部
35 PI制御部
36 PWM制御部
37 インバータ
50 CAN
100 角度診断部
101~103 回転センサ
111~113 角度検出回路
120 判定部
121~123 差演算部
131~133 絶対値部
141~143 比較部
Claims (6)
- 少なくとも操舵トルクに基づいて電流指令値を演算し、前記電流指令値に基づいてインバータによりブラシレスモータをPWM制御すると共に、前記ブラシレスモータの回転角度を検出して電流制御を行い、操舵系をアシスト制御するようになっている電動パワーステアリング装置において、
前記ブラシレスモータの回転角度を検出する3系統の回転角度検出系と、前記3系統の回転角度検出系から出力される各角度の差の絶対値を閾値と比較して、前記回転角度検出系の正常/異常を診断して処理する角度診断部とを具備し、
前記角度診断部で正常と診断された系統の出力角度を用いて前記アシスト制御を継続することを特徴とする電動パワーステアリング装置。 - 前記角度診断部は、各角度差の絶対値が前記閾値より小さいときに正常と診断し、前記各角度の差の絶対値が前記閾値以上のときに異常と診断する請求項1に記載の電動パワーステアリング装置。
- 前記各角度差の絶対値が全て前記閾値より小さいとき、前記3系統のいずれかを出力角度として出力するようになっている請求項2に記載の電動パワーステアリング装置。
- 前記各角度差の絶対値の1つが前記閾値より小さいとき、異常と診断した系統以外の正常な2系統の出力角度を用いて前記アシスト制御を継続するようになっている請求項3に記載の電動パワーステアリング装置。
- 前記正常な2系統の出力角度について異常診断を継続する請求項4に記載の電動パワーステアリング装置。
- 前記異常と診断する系統が2以上であるとき、前記アシスト制御を停止するか又はセンサレス駆動を実施するようになっている請求項2に記載の電動パワーステアリング装置。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/504,723 US9932067B2 (en) | 2014-09-17 | 2014-09-17 | Electric power steering apparatus |
PCT/JP2014/074482 WO2016042607A1 (ja) | 2014-09-17 | 2014-09-17 | 電動パワーステアリング装置 |
JP2016504411A JP6061117B2 (ja) | 2014-09-17 | 2014-09-17 | 電動パワーステアリング装置 |
EP14902264.2A EP3196096B1 (en) | 2014-09-17 | 2014-09-17 | Electric power steering device |
CN201480081907.3A CN106715242B (zh) | 2014-09-17 | 2014-09-17 | 电动助力转向装置 |
BR112017005076-5A BR112017005076B1 (pt) | 2014-09-17 | 2014-09-17 | Aparelho de direção elétrica |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2014/074482 WO2016042607A1 (ja) | 2014-09-17 | 2014-09-17 | 電動パワーステアリング装置 |
Publications (1)
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WO2016042607A1 true WO2016042607A1 (ja) | 2016-03-24 |
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PCT/JP2014/074482 WO2016042607A1 (ja) | 2014-09-17 | 2014-09-17 | 電動パワーステアリング装置 |
Country Status (6)
Country | Link |
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US (1) | US9932067B2 (ja) |
EP (1) | EP3196096B1 (ja) |
JP (1) | JP6061117B2 (ja) |
CN (1) | CN106715242B (ja) |
BR (1) | BR112017005076B1 (ja) |
WO (1) | WO2016042607A1 (ja) |
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CN106218716A (zh) * | 2016-08-25 | 2016-12-14 | 湖北华舟重工应急装备股份有限公司 | 一种电控式半挂车随动转向角度检测装置 |
WO2018008628A1 (ja) * | 2016-07-05 | 2018-01-11 | 日本精工株式会社 | 検出装置及び電動パワーステアリング装置 |
JP2018113834A (ja) * | 2017-01-13 | 2018-07-19 | 日本精工株式会社 | モータ制御装置、電動パワーステアリング装置及び車両 |
JP2019119417A (ja) * | 2018-01-11 | 2019-07-22 | 株式会社デンソー | 電動パワーステアリング装置 |
JPWO2021166648A1 (ja) * | 2020-02-18 | 2021-08-26 |
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WO2018008628A1 (ja) * | 2016-07-05 | 2018-01-11 | 日本精工株式会社 | 検出装置及び電動パワーステアリング装置 |
CN109416293A (zh) * | 2016-07-05 | 2019-03-01 | 日本精工株式会社 | 检测装置以及电动助力转向装置 |
US10850769B2 (en) | 2016-07-05 | 2020-12-01 | Nsk Ltd. | Detecting apparatus and electric power steering apparatus |
CN109416293B (zh) * | 2016-07-05 | 2021-08-03 | 日本精工株式会社 | 检测装置以及电动助力转向装置 |
CN106218716A (zh) * | 2016-08-25 | 2016-12-14 | 湖北华舟重工应急装备股份有限公司 | 一种电控式半挂车随动转向角度检测装置 |
JP2018113834A (ja) * | 2017-01-13 | 2018-07-19 | 日本精工株式会社 | モータ制御装置、電動パワーステアリング装置及び車両 |
JP2019119417A (ja) * | 2018-01-11 | 2019-07-22 | 株式会社デンソー | 電動パワーステアリング装置 |
JPWO2021166648A1 (ja) * | 2020-02-18 | 2021-08-26 | ||
WO2021166648A1 (ja) * | 2020-02-18 | 2021-08-26 | 日立Astemo株式会社 | 電子制御装置、電動パワーステアリング装置、及び電動パワーステアリング装置の制御装置 |
JP7320122B2 (ja) | 2020-02-18 | 2023-08-02 | 日立Astemo株式会社 | 電子制御装置、電動パワーステアリング装置、及び電動パワーステアリング装置の制御装置 |
Also Published As
Publication number | Publication date |
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BR112017005076B1 (pt) | 2023-02-14 |
CN106715242B (zh) | 2019-05-03 |
EP3196096A1 (en) | 2017-07-26 |
CN106715242A (zh) | 2017-05-24 |
EP3196096B1 (en) | 2019-02-20 |
BR112017005076A8 (pt) | 2022-07-12 |
US20170267278A1 (en) | 2017-09-21 |
BR112017005076A2 (pt) | 2018-07-31 |
JPWO2016042607A1 (ja) | 2017-04-27 |
JP6061117B2 (ja) | 2017-01-18 |
US9932067B2 (en) | 2018-04-03 |
EP3196096A4 (en) | 2018-04-18 |
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