公开(公告)号：US09716450B2

公开(公告)日：2017-07-25

申请号：US14896970

申请日：2014-04-03

申请人： Robert Bosch GmbH

发明人： Ulrich Vollmer ,  Yanhui Xu

IPC分类号： H02K29/06 ,  H02P6/10 ,  H02K11/21 ,  H02K11/27 ,  H02P6/00 ,  H02P6/16 ,  H02P21/14

CPC分类号： H02P6/10 ,  H02K11/21 ,  H02K11/27 ,  H02P6/001 ,  H02P6/16 ,  H02P21/14

摘要： The invention relates to an electronically commutated electric motor with a stator and a rotor, which is designed as a permanent magnet rotor in particular. The electric motor also has a control unit which is connected to the stator. The control unit is designed to generate control signals for energizing the stator coils of the stator in order to generate a rotational magnetic field. The electric motor is designed to at least partly compensate for a torque ripple of a torque generated by the rotor. According to the invention, the electric motor has a rotor position sensor and a current sensor. The current sensor is designed to detect currents flowing in the stator coils and to generate a current signal which represents the currents. The control unit preferably has a processing unit which is designed to ascertain harmonics of the electromotive force dependent on the current signal, a voltage applied to the stator coils, and a rotor position signal generated by the rotor position sensor and to generate a control signal which compensates for the effect of the harmonics. The control unit, in particular the processing unit, is designed to superimpose the compensating control signal with the control signal so as to completely or at least partly compensate for the effect of the harmonics and thus the torque ripple.

公开(公告)号：US20160111986A1

公开(公告)日：2016-04-21

申请号：US14896970

申请日：2014-04-03

申请人： ROBERT BOSCH GMBH

发明人： Ulrich Vollmer ,  Yanhui Xu

IPC分类号： H02P6/10 ,  H02P21/14 ,  H02K11/27 ,  H02K11/21 ,  H02P6/16 ,  H02P6/00

CPC分类号： H02P6/10 ,  H02K11/21 ,  H02K11/27 ,  H02P6/001 ,  H02P6/16 ,  H02P21/14

摘要： The invention relates to an electronically commutated electric motor with a stator and a rotor, which is designed as a permanent magnet rotor in particular. The electric motor also has a control unit which is connected to the stator. The control unit is designed to generate control signals for energizing the stator coils of the stator in order to generate a rotational magnetic field. The electric motor is designed to at least partly compensate for a torque ripple of a torque generated by the rotor. According to the invention, the electric motor has a rotor position sensor and a current sensor. The current sensor is designed to detect currents flowing in the stator coils and to generate a current signal which represents the currents. The control unit preferably has a processing unit which is designed to ascertain harmonics of the electromotive force dependent on the current signal, a voltage applied to the stator coils, and a rotor position signal generated by the rotor position sensor and to generate a control signal which compensates for the effect of the harmonics. The control unit, in particular the processing unit, is designed to superimpose the compensating control signal with the control signal so as to completely or at least partly compensate for the effect of the harmonics and thus the torque ripple.

摘要翻译： 本发明涉及具有定子和转子的电子换向电动机，其被特别设计为永磁转子。 电动机还具有连接到定子的控制单元。 控制单元被设计成产生用于激励定子的定子线圈的控制信号，以便产生旋转磁场。 电动机被设计成至少部分地补偿由转子产生的扭矩的转矩波动。 根据本发明，电动机具有转子位置传感器和电流传感器。 电流传感器设计用于检测在定子线圈中流动的电流并产生表示电流的电流信号。 控制单元优选地具有处理单元，其被设计成根据电流信号确定电动势的谐波，施加到定子线圈的电压以及由转子位置传感器产生的转子位置信号，并产生控制信号， 补偿谐波的影响。 控制单元，特别是处理单元，被设计成将补偿控制信号与控制信号叠加，以完全或至少部分地补偿谐波的影响，从而补偿扭矩波动。