Converters for Electric Motors

Selection of Ratings of Devices of a Chopper Converter

Selection of Ratings of Devices of a Chopper Converter: Chopper Converter – The waveforms of currents and voltages are useful in deciding the ratings of devices. The main thyristor carries the load current. Superimposed on this there is a current pulse during the recharging process of the capacitor through the resonating circuit. Therefore the peak …

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DC Chopper

DC Chopper: DC Chopper are mainly dc to dc single stage conversion devices which provide a variable voltage on the load side when fed from a constant dc voltage source. The commutation of the current from the thyristors cannot be achieved by means of supply voltage. The necessary reactive power for the converter must be …

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