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Patent Searching and Data


Title:
MOTOR DRIVE SYSTEM AND INVERTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/116551
Kind Code:
A1
Abstract:
This motor drive system (5) is provided with a plurality of inverter devices (3a)-(3n) connected in parallel with each other to a DC bus line (2). The inverter devices (3) are each provided with: a power conversion circuit (31) for converting DC power to AC power; a voltage detection circuit (32) for detecting DC voltage (Vdc); a smoothing capacitor (33) connected in parallel with the power conversion circuit (31); a regeneration circuit (34) having a resistor (341) and a semiconductor switching element (342); a state determination circuit (35) for determining whether the power conversion circuit (31) is in a regenerative state or not; and a regeneration control circuit (36) for performing control to bring the semiconductor switching element (342) into a conductive state or a cut-off state on the basis of the determination result by the state determination circuit (35) and the comparison result between the DC voltage and a determination threshold value.

Inventors:
KAZAMA, Hirotoshi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
OKUDA, Tetsuya (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
WATABU, Kazuyoshi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2017/045161
Publication Date:
June 20, 2019
Filing Date:
December 15, 2017
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H02P5/74; H02P3/22; H02P27/06
Domestic Patent References:
WO2015063865A12015-05-07
WO2015049746A12015-04-09
Foreign References:
JPH0795775A1995-04-07
JP2014128172A2014-07-07
JPH10178779A1998-06-30
JP2012175871A2012-09-10
JP2005253213A2005-09-15
JP2016074516A2016-05-12
Attorney, Agent or Firm:
TAKAMURA, Jun (Sakai International Patent Office, Toranomon Mitsui Building 8-1, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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