公开(公告)号：US20140084825A1

公开(公告)日：2014-03-27

申请号：US14039852

申请日：2013-09-27

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

Inventor： Hui LUO ,  Zhiyong DU ,  Xuguang ZHOU ,  Xinxin ZHANG ,  Xing CHEN ,  Kai XIAO ,  Lipin CHENG

IPC: H02P6/00 ,  H02P6/12

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.

Abstract translation: 用于检查同步电动机的失步的方法包括检测同步电动机的电度，其中电度包括以预定间隔检测到的至少第一电度和第二电度，第二电 在第一电度之后检测度; 将第一电度与第二电度进行比较以获得比较结果; 并且当比较结果满足预设要求时，确定同步电动机不合格。 当电度保持不变或逐渐减小时，同步电动机不合格，或者电度的增量非常小。

公开(公告)号：US20140084826A1

公开(公告)日：2014-03-27

申请号：US14039984

申请日：2013-09-27

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

Inventor： Hui LUO ,  Zhiyong DU ,  Xuguang ZHOU ,  Xinxin ZHANG ,  Xing CHEN ,  Taotao YANG ,  Lipin CHENG

IPC: H02P6/00 ,  H02P6/12

CPC classification number: H02P6/12 ,  H02P6/34 ,  H02P29/0241

Abstract: A method for checking an out-of-step of a synchronous motor includes detecting three-phase currents of the synchronous motor; determining whether a relationship between the three-phase currents satisfies a preset requirement; and if no, determining that the synchronous motor is out of step. It is determined that the synchronous motor is out of step when amplitudes of each current of the three-phase currents are not equal or when the phase difference between the three-phase currents is not 120°.

Abstract translation: 用于检查同步电动机的失步的方法包括检测同步电动机的三相电流; 确定三相电流之间的关系是否满足预设要求; 并且如果否，则确定同步电动机不合格。 确定当三相电流的每个电流的幅度不相等时或当三相电流之间的相位差不是120°时，同步电动机失步。