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Title:
ELECTRIC MOTOR CONTROL DEVICE AND HEAT EXCHANGER UNIT
Document Type and Number:
WIPO Patent Application WO/2019/145993
Kind Code:
A1
Abstract:
Provided are an electric motor control device and a heat exchanger unit equipped with the electric motor control device. The electric motor control device has: a power conversion device that supplies three-phase voltage to a plurality of electric motors; a switching device that electrically connects or disconnects at least the power conversion device and the electric motors except one electric motor; and a control unit that controls the operations of the power conversion device and the switching device. When switching from a state in which two or more electric motors are operating to a single-operation state in which only a set electric motor, which is a single motor that has been set, operates, the control unit reduces the rotational speeds of the two or more operating electric motors and then brings the switching device into an off-state.

Inventors:
ASAI, Toshiki (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
KUSUBE, Shinsaku (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
SAKANOBE, Kazunori (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
WADA, Yasuhiko (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
KOBAYASHI, Takahiko (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2018/001933
Publication Date:
August 01, 2019
Filing Date:
January 23, 2018
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H02P5/46
Foreign References:
JP2007259554A2007-10-04
JP2001286175A2001-10-12
JPH1172087A1999-03-16
JPH06189596A1994-07-08
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (East 8F, TORANOMON TWIN BLDG. 10-1 Toranomon 2-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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