Title:
CONTROL DEVICE AND POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/004154
Kind Code:
A1
Abstract:
Provided is a control device of a power conversion device, said power conversion device comprising: at least one alternating-current capacitor that is disposed in a capacitor circuit which branches from an alternating-current circuit on an output side of an inverter, and that is disconnected from the circuit during a failure; and an electric current sensor that is disposed in the capacitor circuit, and that acquires an electric current value of an alternating-current electric current of each phase flowing to the alternating-current capacitor. The control device comprises: an amplitude calculation unit that acquires, from the electric current sensor, the electric current value of the alternating-current electric current of each phase flowing to the alternating-current capacitor, and that calculates, on the basis of the acquired electric current value of the alternating-current electric current of each phase, a value of an amplitude of a fundamental wave component of the alternating-current electric current of each phase; and a failure determination unit that compares the sizes of a prescribed determination value and the value of the amplitude of the fundamental wave component of the alternating-current electric current of each phase calculated by the amplitude calculation unit, and that determines that there is a failure of the alternating-current capacitor if the value of the amplitude of at least one phase among the values of the amplitude of the fundamental wave component of the alternating-current electric current of the phases is less than the prescribed determination value.
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Inventors:
TERASHIMA DAIKI (JP)
FUKASAWA ISSEI (JP)
FUKASAWA ISSEI (JP)
Application Number:
PCT/JP2022/026318
Publication Date:
January 04, 2024
Filing Date:
June 30, 2022
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC IND (JP)
International Classes:
H02M7/48
Foreign References:
| JPH11174105A | 1999-07-02 | |||
| JP2019158456A | 2019-09-19 | |||
| JP2021141688A | 2021-09-16 | |||
| US20150241503A1 | 2015-08-27 | |||
| JP2014011865A | 2014-01-20 |
Attorney, Agent or Firm:
TAKADA, TAKAHASHI & PARTNERS (JP)
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