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This paper deals with single-phase current-source active rectifier (CSAR) dedicated for retrofitting of older types of DC machine locomotives and also for the new generation of traction converters employing medium-frequency transformer. A summary of main tasks of the converter operation and proposed solutions will be presented in this paper. Required CSAR behavior have been: (i) the operation on both...
This paper deals with the new configuration of the traction converter with medium-frequency transformer intended for AC trolley wire fed locomotives. The main attention is paid to the primary serially connected single-phase voltage-source active rectifiers, which are directly connected to the trolley wire. This paper describes the control of the primary active rectifiers, presents simulation results...
This research has been motivated by industrial demand for single-phase current-source active rectifier (CSAR) dedicated for reconstruction of older types of dc machine locomotives. This contribution presents new control strategy of CSAR using controller of phase shift angle (phi) between trolley wire voltage and current supplemented by compensation of trolley wire current waveform under supply voltage...
This paper deals with design of a new control system for a diesel-electric power supply unit, which output part is composed of a three-phase four-leg voltage source inverter. The main emphasis is given in this paper on employed modulation techniques. We are introducing two modulation strategies: 1) three- dimensional space vector PWM (3D-SVPWM) and 2) improved carrier-based PWM (CBPWM), which employs...
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