Invention Grant
- Patent Title: Motor control apparatus including protection mechanism
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Application No.: US16953688Application Date: 2020-11-20
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Publication No.: US11223194B2Publication Date: 2022-01-11
- Inventor: Hironao Tanouchi , Naoki Masuda , Masato Watanabe , Hirokazu Nagai
- Applicant: Fanuc Corporation
- Applicant Address: JP Yamanashi
- Assignee: Fanuc Corporation
- Current Assignee: Fanuc Corporation
- Current Assignee Address: JP Yamanashi
- Agency: RatnerPrestia
- Priority: JPJP2019-226651 20191216
- Main IPC: H02H7/08
- IPC: H02H7/08 ; H02P29/032 ; H02P27/08 ; H02P29/024

Abstract:
A motor control apparatus includes: a main power conversion circuit that converts power that is supplied from a power supply into alternating current power for driving a motor, and outputs the alternating current power; a counter electromotive force protection circuit including a rectifier unit that rectifies alternating current power based on counter electromotive force of the motor and outputs direct current power, a short-circuit unit that short-circuits terminals on a direct current output side of the rectifier unit, and an alarm signal output unit that outputs an alarm signal at occurrence of an abnormality; a monitoring unit that monitors whether the alarm signal is output from the alarm signal output unit; and a protection operation unit that performs a protection operation for preventing damage to the main power conversion circuit when the monitoring unit determines that the alarm signal is output from the alarm signal output unit.
Public/Granted literature
- US20210184457A1 MOTOR CONTROL APPARATUS INCLUDING PROTECTION MECHANISM Public/Granted day:2021-06-17
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