POWER CONVERSION DEVICE - TOSHIBA MITSUBISHI ELEC IND

Title:

POWER CONVERSION DEVICE

Document Type and Number:

WIPO Patent Application WO/2019/049321

Kind Code:

A1

Abstract:

This power conversion device comprises: a converter 31 that has a three-phase alternating current power source 1 on the input side, and outputs a direct current voltage; an inverter 32 that is connected to the output side of the converter 31 and that drives an alternating current motor 5 through an output switch 4; a power source switch 6 for directly driving the alternating current motor 5 by the alternating current power source 1; a current detector 12 that detects an output current from the inverter 32; a voltage detector 14 and a current detector 13 that respectively detect the voltage and the current of a power source system on the input side of the converter 3; and a control unit 7 that controls the three-phase output voltage of the inverter 32 on the basis of a three-phase voltage command. The control unit 7 has a vector control unit that performs vector control of the alternating current motor 5, and a synchronous turn-on control unit 83. The synchronous turn-on control unit 83 turns on the power source switch 6 to synchronously connect the alternating current motor 5 to the alternating current power source 1, and then switches the control system and causes the inverter 32 to operate as a reactive power control device of the power source system.

Inventors:

TOBAYASHI SHUNSUKE
OKA TOSHIAKI

Application Number:

PCT/JP2017/032514

Publication Date:

March 14, 2019

Filing Date:

September 08, 2017

Export Citation:

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Assignee:

TOSHIBA MITSUBISHI ELEC IND (JP)

International Classes:

H02M7/48

Domestic Patent References:

WO2015173892A1

2015-11-19

Foreign References:

JPH01177895A	1989-07-14
JPH01186187A	1989-07-25
JPS5740394A	1982-03-05
JPH0583989A	1993-04-02
JPH08182386A	1996-07-12
JP2001197683A	2001-07-19

Other References: