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A conventional unregulated fuel cell system requires a multi-stage operation in order to get three phase AC power supply for integration with load or grid. The output of fuel cell which is DC has to be converted into high frequency AC which has low efficiency due to high switching losses. In this paper high frequency power is regulated with the help of cascade connection of the series resonant converter...
One of the major trends in power electronics is increasing the switching frequencies. The advances in the frequency elevation have made it possible to reduce the total size and weight of the passive components such as capacitors, inductors and transformers in the static inverter and hence to increase the power density. The system consists of hard switched boost chopper, soft switched high frequency...
A static inverter for EMU (Electric Multiple Unit) is massive because of passive components such as high power transformers, reactors and capacitors etc. In this paper how to design and control the lightweight static inverter is proposed. The system consists of hard switched boost chopper, soft switched high frequency inverter, high frequceny transformer and rectifier. This system features a boost...
Lightweight power supply systems using soft-switched high frequency dc-dc converter for rolling stock is proposed in this paper. The system consists of hard switched boost chopper, soft switched high frequency inverter, high frequency transformer and rectifier. This system features a boost chopper to control the input current and to set up a controlled DC link. And A soft switched full bridge inverter...
This paper deals with a novel type soft switching utility frequency AC- high frequency AC converter using asymmetrical PWM bidirectional active switches which can be defined as high frequency resonant matrix converter. This power frequency changer can directly convert utility frequency AC power to high frequency AC power ranging more than 20 kHz up to 100 kHz. Only one active edge resonant capacitor-assisted...
This paper deals with a novel type soft switching utility frequency AC-high frequency AC converter using asymmetrical PWM bidirectional active switches which can be defined as high frequency resonant matrix converter. This power frequency changer can directly convert utility frequency AC power to high frequency AC power ranging more than 20 kHz up to 100 kHz. Only one active edge resonant capacitor-assisted...
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