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phase controlled RECTIFIER circuit used Natural Commutation......

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13y ago

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What is mean by commutation switch?

A commutation switch is a device used to reverse the direction of current flow in a circuit, typically in motor control applications to control the direction of rotation. It allows for the smooth transition of current between different circuit elements, such as switching from one winding to another in a motor to maintain torque.


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What does forced commutation mean?

The term "Forced commutation" is used when a thyristor is turned off using external components. If a thyristor is used in a DC circuit, when first turned on, it will stay on until the current goes to zero. To turn off the thyristor it is possible to use a Forced commutation circuit. The circuit creates a reverse voltage over the thyristor (and a small reverse current) for a short time, but long enough to turn off the thyristor. A simple circuit consist of a precharged capacitor and a switch (e.g. another thyristor) parallel to the thyristor. When the switch is closed, the current is supplied by the capacitor for a short while. This cause a reversed voltage over the thyristor, and the thyristor is turned off.


What are the problems of commutation in a DC generator?

1.resistance commutation 2.e.m.f commutation


What kind of math is used in circuitry?

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What happens when a bulb of 6volts used in an circuit?

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What is class A commutation of thyristor?

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What kind of current is produced by dry cells?

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Where was the French horn invented?

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