Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/037720
Kind Code:
A1
Abstract:
When a large main current is interrupted, there is a risk that an excessive surge voltage could be applied to a main terminal of a power semiconductor component. In the present invention, a third switching component 113 is turned on in response to a control signal from a control circuit 150, the control signal being generated when a signal is received from an overcurrent detection circuit 108 when the overcurrent detection circuit 108 has detected that a main current flowing in an IGBT 101 is an overcurrent. In this case, however, the control signal from the control circuit 150 is not input to a second switching component 112, and the second switching component 112 is in an off state. When the third switching component 113 is turned on, a gate capacitor 103 of the IGBT 101 is discharged via a saturation current circuit 114 at a slower speed than when the second switching component 112 is turned on.
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Inventors:
HIRAO TAKASHI (JP)
SAKANO JUNICHI (JP)
TOKUYAMA TAKESHI (JP)
SAKANO JUNICHI (JP)
TOKUYAMA TAKESHI (JP)
Application Number:
PCT/JP2017/024427
Publication Date:
March 01, 2018
Filing Date:
July 04, 2017
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
H02M7/48; H02M1/08; H03K17/16; H03K17/56
Foreign References:
| JP2002027657A | 2002-01-25 | |||
| JP2014165932A | 2014-09-08 | |||
| JP2016067171A | 2016-04-28 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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