公开(公告)号：EP4398478A1

公开(公告)日：2024-07-10

申请号：EP22863522.3

申请日：2022-08-31

申请人： Bosch Huayu Steering Systems Co., Ltd.

发明人： YU, Zhigang ,  LI, Shuo ,  SUN, Rui

IPC分类号： H02P21/05 ,  H02P21/22 ,  H02P25/024 ,  H02P27/08 ,  H02M1/12 ,  H02M7/48 ,  H02J3/01 ,  H02J1/02 ,  H01P1/212 ,  H01S3/109 ,  H03B1/04 ,  G01R23/16

CPC分类号： Y02E40/40 ,  G01R23/16 ,  H01P1/212 ,  H01S3/109 ,  H02J1/02 ,  H02J3/01 ,  H02M1/12 ,  H02M7/48 ,  H02P21/00 ,  H02P21/05 ,  H02P21/22 ,  H02P25/024 ,  H02P27/08 ,  H02P29/50 ,  H03B1/04

摘要： Provided is a method for suppressing 24th-order noise of an electric motor on the basis of harmonic current injection. The method comprises: converting a three-phase current of an electric motor, which is collected by a three-phase current sampling module, into an id feedback current and an iq feedback current; injecting, into the iq feedback current, a harmonic current iqcomp of a 6th-order electrical frequency, and calibrating the values of a compensated 6th harmonic amplitude igain of the iq feedback current and an initial phase angle θoffset, so as to offset a 6th-order harmonic component in the iq feedback current; making an id instruction current and the id feedback current, and an iq instruction current and the iq feedback current respectively pass through a PI controller, and then performing adjustments to obtain a ud* control voltage and a uq* control voltage; and transforming the ud* control voltage and the uq* control voltage into a uα* voltage and a uβ* voltage by means of inverse Clark transformation and inverse Park transformation, such that the electric motor is controlled by means of the uα* voltage and the uβ* voltage, thereby achieving the aim of suppressing 24th-order noise of the electric motor.

公开(公告)号：EP4411398A1

公开(公告)日：2024-08-07

申请号：EP22874532.9

申请日：2022-08-31

申请人： Bosch Huayu Steering Systems Co., Ltd.

发明人： ZHAO, Yu ,  ZHAI, Yu ,  LI, Shuo ,  GAO, Peng ,  DIAO, Guoliang

IPC分类号： G01R31/34

CPC分类号： G01R29/16 ,  G01R31/34

摘要： The present invention provides a phase failure diagnosis method based on current instruction reconstruction and negative sequence current extraction. The method comprises the following steps: calculating a d-axis current instruction value and a q-axis current instruction value of a motor according to the current torque, the rotating speed and the voltage of the motor; performing inverse Clark transformation and inverse Park transformation on the d-axis current instruction value and the q-axis current instruction value of the motor, to obtain a U-phase current reference value, a V-phase current reference value and a W-phase current reference value; calculating a reference negative sequence component of the U-phase current according to the U-phase current reference value, the V-phase current reference value and the W-phase current reference value; calculating a negative sequence component of the U-phase current according to the three-phase current; and calculating the difference between the reference negative sequence component of the U-phase current and the negative sequence component of the U-phase current, and performing phase failure diagnosis according to the difference between the reference negative sequence component and the negative sequence component. Therefore, phase failure diagnosis based on current instruction reconstruction and negative sequence current extraction is realized.

公开(公告)号：EP4391358A1

公开(公告)日：2024-06-26

申请号：EP22866499.1

申请日：2022-08-31

申请人： Bosch Huayu Steering Systems Co., Ltd.

发明人： ZHAI, Yu ,  ZHAO, Yu ,  LI, Shuo ,  YU, Zhigang ,  DIAO, Guoliang

IPC分类号： H02P29/024 ,  H02P21/00 ,  H02P29/028

CPC分类号： H02P21/00 ,  H02P21/22 ,  H02P29/024 ,  H02P29/028

摘要： Provided is a method for achieving motor control in an open-phase condition, comprising: collecting a three-phase current and a duty cycle signal; calculating a d-axis demand current, a q-axis demand current, a d-axis feedback current, and a q-axis feedback current of a motor according to the current rotating speed, a demand torque, and a bus voltage of the motor; and performing open-phase diagnosis according to the d-axis demand current, the q-axis demand current, the d-axis feedback current, the q-axis feedback current, and the duty cycle signal, thereby achieving the motor control in the open-phase condition.