公开(公告)号：US09887646B2

公开(公告)日：2018-02-06

申请号：US14039852

申请日：2013-09-27

Applicant: SHENZHEN BYD AUTO R&D COMPANY LIMITED ,  BYD COMPANY LIMITED

Inventor： Hui Luo ,  Zhiyong Du ,  Xuguang Zhou ,  Xinxin Zhang ,  Xing Chen ,  Kai Xiao ,  Lipin Cheng

IPC: H02H7/08 ,  H02P21/00 ,  H02P6/00 ,  H02P6/12 ,  H02P6/182 ,  H02P6/34

CPC classification number: H02P6/12 ,  H02P6/182 ,  H02P6/34

Abstract: A method for checking an out-of-step of a synchronous motor includes detecting electric degrees of the synchronous motor, in which the electric degrees comprise at least a first electric degree and a second electric degree detected at a preset interval, and the second electric degree is detected after the first electric degree; comparing the first electric degree with the second electric degree to obtain a comparing result; and determining that the synchronous motor is out of step when the comparing result satisfies a preset requirement. It is determined that the synchronous motor is out of step when the electric degree keeps unchanged or decreases progressively, or an increment of the electric degree is very small.

公开(公告)号：US20130257325A1

公开(公告)日：2013-10-03

申请号：US13800823

申请日：2013-03-13

Applicant: SHENZHEN BYD AUTO R&D COMPANY LIMITED ,  BYD COMPANY LIMITED

Inventor： Zhiyong Du ,  Xing Chen ,  Kai Xiao

IPC: H02P21/00

CPC classification number: H02P21/0035 ,  H02P21/0003 ,  H02P21/0021 ,  H02P21/22

Abstract: A method for controlling a rotation rate of an electric motor includes the s following steps: determining if an absolute value of a difference between an objective rotation rate of the electric motor and an actual rotation rate of the electric motor is greater than or equal to a predetermined value, and if yes, compensating a q axis current of the electric motor to adjust the rotation rate.

Abstract translation: 一种用于控制电动机的转速的方法包括以下步骤：确定电动机的目标转速与电动机的实际转速之差的绝对值是否大于或等于 并且如果是，则补偿电动机的aq轴电流以调节转速。

公开(公告)号：US09018875B2

公开(公告)日：2015-04-28

申请号：US13800823

申请日：2013-03-13

Applicant: Shenzhen BYD Auto R&D Company Limited ,  BYD Company Limited

Inventor： Zhiyong Du ,  Xing Chen ,  Kai Xiao

IPC: H02P6/14 ,  H02P21/00

CPC classification number: H02P21/0035 ,  H02P21/0003 ,  H02P21/0021 ,  H02P21/22

Abstract: A method for controlling a rotation rate of an electric motor includes the s following steps: determining if an absolute value of a difference between an objective rotation rate of the electric motor and an actual rotation rate of the electric motor is greater than or equal to a predetermined value, and if yes, compensating a q axis current of the electric motor to adjust the rotation rate.

Abstract translation: 一种用于控制电动机的转速的方法包括以下步骤：确定电动机的目标转速与电动机的实际转速之差的绝对值是否大于或等于 并且如果是，则补偿电动机的aq轴电流以调节转速。