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Patent Searching and Data


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:
JP2017/032514
Publication Date:
March 14, 2019
Filing Date:
September 08, 2017
Export Citation:
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Assignee:
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (3-1-1, Kyobashi Chuo-k, Tokyo 31, 〒1040031, JP)
International Classes:
H02M7/48
Foreign References:
JPH01177895A1989-07-14
JPH01186187A1989-07-25
JPS5740394A1982-03-05
JPH0583989A1993-04-02
Attorney, Agent or Firm:
INOUE, Masanori (Kawasaki Ekimae Tower Riverk 12-1, Ekimae-honcho, Kawasaki-ku, Kawasaki-sh, Kanagawa 07, 〒2100007, JP)
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