Invention Grant
- Patent Title: Motor drive device including insulation deterioration detection function and insulation resistance detection method of motor
- Patent Title (中): 电机驱动装置包括电机的绝缘劣化检测功能和绝缘电阻检测方法
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Application No.: US14591500Application Date: 2015-01-07
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Publication No.: US09404974B2Publication Date: 2016-08-02
- Inventor: Hiroyasu Sato , Masaya Tateda , Akira Hirai
- Applicant: FANUC Corporation
- Applicant Address: JP Yamanashi
- Assignee: FANUC CORPORATION
- Current Assignee: FANUC CORPORATION
- Current Assignee Address: JP Yamanashi
- Agency: Hauptman Ham, LLP
- Priority: JP2014-001812 20140108
- Main IPC: H02P25/00
- IPC: H02P25/00 ; H02H7/08 ; G01R31/34 ; G01R27/02 ; G01R31/14
Abstract:
A motor drive device of the present invention includes: a rectification circuit configured to rectify an AC voltage; a power source unit configured to smooth a DC voltage by a capacitor; an inverter unit configured to drive a motor by converting a DC voltage into an AC voltage; a current detection unit configured to measure a current flowing through a resistor which is connected to a coil of the motor and the capacitor; a voltage detection unit configured to measure a value of a voltage across the capacitor; a second switch that grounds the capacitor; and an insulation resistance detection unit configured to detect an insulation resistance value of a motor by using two sets of a current value and a voltage value measured in two states where the second switch is turned off and turned on.
Public/Granted literature
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