Semiconductor power conversion device

Details Semiconductor power conversion device Semiconductor power conversion device

2008-02-13

2011-11-01

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

C363S098000, C323S271000

Reexamination Certificate

active

08050064

ABSTRACT:
A surge voltage target setting unit obtains a main circuit power supply voltage of a semiconductor power conversion device based on an inter-terminal voltage of a semiconductor switching element detected by a voltage detection unit, and sets a control target of a surge voltage in accordance with the obtained main circuit power supply voltage. An active gate control unit, when the semiconductor switching element is turned off, sets a quantity of voltage modification so as to modify a gate voltage in a direction raising the gate voltage, that is, in a direction lowering a turn-off speed, based on feedback of the inter-terminal voltage, when the inter-terminal voltage exceeds the control target.

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Kosei Tsuji, et al., “Propagation of Inverter Surge and Voltage Distribution in Motor Winding,” IEEJ Trans. IA, 2006, pp. 771-777, vol. 126, No. 6.

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