公开(公告)号：US10425031B2

公开(公告)日：2019-09-24

申请号：US15715294

申请日：2017-09-26

Applicant: FANUC CORPORATION

Inventor： Hiroyasu Satou ,  Masaya Tateda ,  Youichirou Ooi ,  Akira Hirai ,  Kiichi Inaba

IPC: H02P27/06 ,  G01R27/08 ,  G01R31/34 ,  H02P5/00

Abstract: In a motor driver of the present invention, voltage and current values measured by a voltage and current detector and a voltage value measured by a voltage detector are determined as first measurement results, in the state of turning on semiconductor switching elements connected between a positive terminal of a capacitor and motor coils. Voltage and current values measured by the voltage and current detector and a voltage value measured by the voltage detector are determined as second measurement results, in the state of, as to a group A, turning on a semiconductor switching element connected between the positive terminal of the capacitor and the motor coil, and as to a group B, turning on semiconductor switching elements connected between a negative terminal of the capacitor and the motor coil. The insulation resistance values are calculated between the motor coils of each group A or B and a ground.

公开(公告)号：US20180091083A1

公开(公告)日：2018-03-29

申请号：US15715294

申请日：2017-09-26

Applicant: FANUC CORPORATION

Inventor： Hiroyasu Satou ,  Masaya Tateda ,  Youichirou Ooi ,  Akira Hirai ,  Kiichi Inaba

IPC: H02P27/06 ,  G01R27/08 ,  G01R31/34

Abstract: In a motor driver of the present invention, voltage and current values measured by a voltage and current detector and a voltage value measured by a voltage detector are determined as first measurement results, in the state of turning on semiconductor switching elements connected between a positive terminal of a capacitor and motor coils. Voltage and current values measured by the voltage and current detector and a voltage value measured by the voltage detector are determined as second measurement results, in the state of, as to a group A, turning on a semiconductor switching element connected between the positive terminal of the capacitor and the motor coil, and as to a group B, turning on semiconductor switching elements connected between a negative terminal of the capacitor and the motor coil. The insulation resistance values are calculated between the motor coils of each group A or B and a ground.