A power converter for a railway vehicle includes a step-up/down chopper 4 that steps up or steps down a voltage received from a DC power supply 1 and outputs the stepped up/down voltage to a DC-AC inverter device 6, which converts the DC power into three-phase AC power and supplies the converted power to an AC motor 7. The step-up/down chopper steps down the DC supply voltage when the output of the inverter decreases and steps up the DC supply voltage when the output of the inverter increases. The output of the inverter may be one of: a frequency of the three-phase AC voltage of the inverter; a voltage amplitude of the three-phase AC voltage of the inverter; a rotation frequency of the AC motor; and a speed of the railway vehicle. By reducing the voltage on the DC side of the inverter, losses caused by harmonic current can be reduced.
Power converter for railway vehicle and railway vehicle having the same
2016-11-09
Patent
Electronic Resource
English
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
POWER CONVERTER, AND VEHICLE DRIVE SYSTEM AND RAILWAY VEHICLE HAVING THE SAME
European Patent Office | 2017
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