Title:
POWER CONVERSION DEVICE, DRIVE CONTROL SYSTEM, MACHINE LEARNING DEVICE, AND MOTOR MONITORING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/188886
Kind Code:
A1
Abstract:
This power conversion device is provided with a main circuit unit, a control unit (12), a current sensor, and a half-wave rectifier. The control unit (12) is provided with current frequency calculation units (42, 51) and monitoring units (43, 52). The current frequency calculation units (42, 51) calculate current frequencies (ωc1, ωc2) on the basis of the rise timing and/or the fall timing of a current detection signal, which is the current detection signal that has been half-wave rectified by the half-wave rectifier. The monitoring units (43, 52) monitor the motor speed on the basis of the current frequencies (ωc1, ωc2) calculated by the current frequency calculation units (42, 51).
Inventors:
HATTORI NORIKAZU (JP)
SUZUKI NORIHIRO (JP)
TANAKA TETSUO (JP)
NORINA NAOTO (JP)
HARADA TAKAHIRO (JP)
SUZUKI NORIHIRO (JP)
TANAKA TETSUO (JP)
NORINA NAOTO (JP)
HARADA TAKAHIRO (JP)
Application Number:
PCT/JP2019/045711
Publication Date:
September 24, 2020
Filing Date:
November 21, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P6/08; H02P27/06; H02P29/024
Domestic Patent References:
| WO2018159274A1 | 2018-09-07 | |||
| WO2018070012A1 | 2018-04-19 |
Foreign References:
| JPH0835712A | 1996-02-06 | |||
| US20130249450A1 | 2013-09-26 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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