Voltage commutation results in best performance in thyristor D.C. chopper .
A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would (1) increase progressively (2 ... 0.5 and then increase (4) increase to a maximum value at α = 0.5 and then decrease Answer : A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would increase to a maximum value at α = 0.5 and then decrease ...
Answer : Yes, we can use triac in the multi-quadrant chopper. ...
Explain two-quadrant chopper......... Answer : Two quadrant chopper: There are two semiconductor controllable switches in the two-quadrant chopper. Two quadrant type A chopper: The figure shows the type A chopper. Both the switch never turn on at ... 2 are turned on then Vo=Vs. When chopper 1 and chopper 2 are off then Vo=-Vs. ...
Answer : By using some circuit the forward DC current of thyristor is forced to zero is called forced commutation....
Answer : Natural commutation is also called as line Communication. The turning off of thyristor due to AC supply is called natural commutation or line commutation. If the thyristor is connected to AC supply ... connected to positive and anode terminal get connected to negative, this turns off the thyristor....
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