POWER CONVERSION DEVICE FOR RAILROAD CAR

WIPO Patent Application WO/2024/084668

A1

In the case of this power conversion device for a railroad car, a converter control section (242) provided in a control device (240) comprises: a counter voltage computation unit (501) for computing a counter voltage to be used as a reference for current control of a converter (210) on the basis of a detected value of an overhead-line voltage; and a voltage phase estimation unit (502) for estimating the phase of an alternating-current voltage to be applied to an auxiliary power supply device (107) during an unpowered period on the basis of the counter voltage. The counter voltage computation unit (501) comprises: a phase difference estimation part (810) for estimating a phase difference between a first phase, that is, the phase of a first voltage which is an overhead-line voltage detected by an ACPT (102) after the unpowered period is ended, and a second phase, that is, the phase of an alternating-current second voltage estimated by the voltage phase estimation unit (502) on the basis of an overhead-line voltage detected by the ACPT (102) before the start of the unpowered period; and a switching part (820) for switching the sign of a frequency correction amount by which to correct the frequency of the second voltage on the basis of the estimated phase difference, that is, the value estimated for the phase difference.

UEBAYASHI CHIYO (JP)
KATO SHO (JP)
YAMAMOTO TAKAYOSHI (JP)
IEZAWA MASAHIRO (JP)
YAMAMOTO AOTO (JP)

PCT/JP2022/039174

April 25, 2024

October 20, 2022

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MITSUBISHI ELECTRIC CORP (JP)

B60L1/00; B60L9/24

WO2017056588A1

2017-04-06

CN103863141A	2014-06-18
JPH01136503A	1989-05-29

TAKAMURA, Jun (JP)

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