POWER CONVERSION DEVICE AND POWER CONVERSION METHOD

To prevent, in a rail vehicle, the degradation of a SiC-MOSFET occurring when power is supplied to an APS in a state in which a converter to which the SiC-MOSFET is applied is stopped. [Solution] In an electric vehicle, this power conversion device converts the AC power, which is acquired from an ov...

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Bibliographische Detailangaben
1. Verfasser:	KOUNO, Yasuhiko
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERATION MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	To prevent, in a rail vehicle, the degradation of a SiC-MOSFET occurring when power is supplied to an APS in a state in which a converter to which the SiC-MOSFET is applied is stopped. [Solution] In an electric vehicle, this power conversion device converts the AC power, which is acquired from an overhead contact line and stepped down by a transformer, to a DC power by performing the switching control of a plurality of power semiconductor elements using parasitic diodes as free-wheeling diodes. The power conversion device has a control unit for performing the drive control of the gates of the plurality of power semiconductor elements. During stopping of the electric vehicle, the control unit does not perform the switching control but conducts current in the reverse direction of the power semiconductor elements and applies a predetermined voltage pulse for converting the AC power to the DC power to the power semiconductor elements.