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Title:
INVERTER DEVICE, COMPRESSOR DRIVE DEVICE, AND AIR-CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2018/042636
Kind Code:
A1
Abstract:
An inverter device is provided with: an inverter main circuit 3 for converting DC power to three-phase AC power using a plurality of semiconductor switching elements SW1-SW6 comprising upper arm switching elements and lower arm switching elements connected in series and disposed between a positive side DC bus line P and a negative side DC bus line N that form DC bus lines; a DC current detection circuit 5 for detecting a current flowing through the DC bus lines; and an inverter control unit 7 for outputting a PWM drive signal for controlling the inverter main circuit 3 on the basis of the DC current detected by the DC current detection circuit 5. A wide band-gap semiconductor element is used for the semiconductor switching elements SW1-SW6, and a parasitic diode of the wide band-gap semiconductor element is used as a free-wheeling diode. The semiconductor switching elements are set such that a reverse recovery time trr of the parasitic diode has a characteristic of (td/100) ≤ trr ≤ (td/10), where td is a short-circuit prevention time for the upper arm switching elements and the lower arm switching elements.

Inventors:
KASHIMA, Mitsuo (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2016/075882
Publication Date:
March 08, 2018
Filing Date:
September 02, 2016
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H02M7/48
Foreign References:
JP2013247695A2013-12-09
JP2016087066A2016-05-23
JP2011234428A2011-11-17
JP2003189670A2003-07-04
JP2001327173A2001-11-22
JP2012197707A2012-10-18
JP2013247695A2013-12-09
JPS5321530B21978-07-03
JPS5235851B21977-09-12
Other References:
SIC POWER DEVICE . MODULE APPLICATION NOTE, August 2014 (2014-08-01), pages 16, Retrieved from the Internet [retrieved on 20161028]
SCT2080 KE N-CHANNEL SIC POWER MOSFET DATA SHEET, November 2015 (2015-11-01), pages 4, Retrieved from the Internet [retrieved on 20161028]
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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