Title:
MOTOR DRIVE SYSTEM
Document Type and Number:
Japanese Patent JP2019161759
Kind Code:
A
Abstract:
To provide a motor drive system in which the function of a safe circuit incorporated in a power conversion device is partially migrated to a higher-level safe controller side so that hardware, etc., is simplified.SOLUTION: The motor drive system includes a motor controller 11 that generates a control signal with which an external controller 10 drives a motor 41 at a prescribed speed, and a safe controller 12 that outputs a safe signal for executing a safe operation on the basis of an output signal from an encoder 31. A power conversion device 21 includes a safe circuit 21a that transmits the output signal of the encoder 31 as well as a unique address to the safe controller 12 via a safe communication bus 15, and that executes the safe operation on the basis of the safe signal transmitted from the safe controller 12 via the safe communication bus 15. The safe operation at least includes an emergency stop operation of interrupting the output from the power conversion device 21 when the safe controller 12 detects a failure in the encoder 31.SELECTED DRAWING: Figure 1
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Inventors:
KOKUBU HIROYUKI
Application Number:
JP2018042490A
Publication Date:
September 19, 2019
Filing Date:
March 09, 2018
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
H02P5/46; G05B9/02; H02P29/024
Domestic Patent References:
JP2017167704A | 2017-09-21 | |||
JP2017147841A | 2017-08-24 | |||
JP2010152595A | 2010-07-08 |
Foreign References:
US20120074876A1 | 2012-03-29 |
Attorney, Agent or Firm:
Yuichi Morita