Write the following for a bidirectional AC Voltage controller with two SCRS only a) Draw its circuit diagram and waveform. b) Explain briefly its operation. c) Explain what will happen if the SCRS are fired at different firing angles.

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Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.