Title:
POWER CONVERSION DEVICE AND REMOTE MONITORING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/024890
Kind Code:
A1
Abstract:
Provided are a power conversion device and a remote monitoring system capable of calculating the life of a power semiconductor device with high accuracy. In order to achieve the above purpose, a power conversion device, which controls the flow or interruption of a current with an inverter having a power semiconductor device and performs desired power conversion, comprises: a motor control unit which calculates a gate signal on the basis of a current value, a speed command, and a carrier frequency detected by a current sensor and controls the inverter; a temperature history calculator which estimates the loss of the power semiconductor device and calculates a temperature history; a temperature history storage device which stores the calculation result of the temperature history; and a damage calculator which calculates damage to the power semiconductor device from the temperature history read from the temperature history storage device.
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Inventors:
MATSUMOTO DAISUKE (JP)
TANABE KEISUKE (JP)
HOTTA KAZUSHIGE (JP)
SATO FUMIHIRO (JP)
HIRAGA MASAHIRO (JP)
TANABE KEISUKE (JP)
HOTTA KAZUSHIGE (JP)
SATO FUMIHIRO (JP)
HIRAGA MASAHIRO (JP)
Application Number:
PCT/JP2021/027226
Publication Date:
February 03, 2022
Filing Date:
July 20, 2021
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
H02M7/48
Domestic Patent References:
| WO2004082114A1 | 2004-09-23 |
Foreign References:
| JP2012010490A | 2012-01-12 | |||
| JP2011097812A | 2011-05-12 | |||
| JP2008131722A | 2008-06-05 | |||
| JP2015114202A | 2015-06-22 | |||
| JP2005269832A | 2005-09-29 |
Other References:
See also references of EP 4191863A4
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
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