Title:
ABNORMALITY DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2018182892
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an abnormality detection device capable of quickly identifying an abnormality occurrence factor in a power supply device for a brake of a motor.SOLUTION: According to an embodiment, an abnormality detection device comprises: a first waveform recording circuit that detects input current of a brake power supply device for supplying power to a brake of a motor according to input of an open command signal to record, as an input current waveform, a set of time series of current values of the input current; and an abnormality detection circuit that compares the input current waveform with a first reference wave form, which is a set of time series of current values of input current to be a reference stored previously, to determine the existence of abnormality in the brake power supply device.SELECTED DRAWING: Figure 1
Inventors:
ASAKA TAKATOSHI
Application Number:
JP2017078912A
Publication Date:
November 15, 2018
Filing Date:
April 12, 2017
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC IND
International Classes:
H02P3/04
Domestic Patent References:
| JP2016082656A | 2016-05-16 | |||
| JPH0522968A | 1993-01-29 | |||
| JP2016222372A | 2016-12-28 | |||
| JP2011046493A | 2011-03-10 | |||
| JPS6291357A | 1987-04-25 | |||
| JPH01197290A | 1989-08-08 |
Attorney, Agent or Firm:
Masahiko Hinataji
Junichi Kozaki
Hiroshi Ichikawa
Junichi Kozaki
Hiroshi Ichikawa