Invention Publication
- Patent Title: MOTOR DRIVE DEVICE PROVIDED WITH CHARGING CONTROL UNIT
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Application No.: US18285405Application Date: 2021-04-16
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Publication No.: US20240178646A1Publication Date: 2024-05-30
- Inventor: Sou Saito , Tsutomu Shikagawa
- Applicant: Fanuc Corporation
- Applicant Address: JP Minamitsuru-gun, Yamanashi
- Assignee: Fanuc Corporation
- Current Assignee: Fanuc Corporation
- Current Assignee Address: JP Minamitsuru-gun, Yamanashi
- International Application: PCT/JP2021/015772 2021.04.16
- Date entered country: 2023-10-03
- Main IPC: H02H1/00
- IPC: H02H1/00 ; H02H7/08 ; H02H7/122 ; H02M7/00 ; H02P1/02

Abstract:
A motor drive device includes: a converter that converts AC power supplied from an AC power source into DC power and outputs the DC power to a DC link; a capacitor installed in the DC link; an inverter that converts the DC power at the DC link into AC power for driving a motor and outputs the AC power; a charging circuit that has a charging resistor for preventing inrush current during the period of pre-charging of the capacitor; a charging control unit that controls the pre-charging of the capacitor executed by the charging circuit; and an abnormality determination unit that determines, during the period of pre-charging of the capacitor, whether an abnormality has occurred, on the basis of a measurement value of the voltage of the capacitor and/or a measurement value of the current flowing through the DC link.
Information query