Title:
ELECTROLYTIC CAPACITOR LIFE DETERMINATION DEVICE AND MOTOR DRIVING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/176193
Kind Code:
A1
Abstract:
This invention is an electrolytic capacitor life determination device (20) for determining the life of an electrolytic capacitor connected between a motor (3) and a single-phase or three-phase AC power supply (2) of a motor drive device (1) comprising a voltage detection unit (15) for measuring a DC voltage used for drive control of the motor (3). This electrolytic capacitor life determination device (20) comprises a current detection unit (21) for measuring a ripple current flowing through the electrolytic capacitor and a diagnosis unit (22) for determining the remaining life of the electrolytic capacitor using actually measured ripple current values that are the ripple current values measured by the current detection unit (21) and actually measured DC voltage values that are the DC voltage values measured by the voltage detection unit (15).
Inventors:
SHIBATA FUMIAKI (JP)
Application Number:
PCT/JP2021/006596
Publication Date:
August 25, 2022
Filing Date:
February 22, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01R27/26; G01R31/00
Foreign References:
| JPH11356036A | 1999-12-24 | |||
| JP2008164453A | 2008-07-17 | |||
| JP2004056893A | 2004-02-19 | |||
| JP2010233425A | 2010-10-14 | |||
| JP2018004523A | 2018-01-11 | |||
| JP2016208773A | 2016-12-08 | |||
| CN109085443A | 2018-12-25 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
Download PDF: