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What does the term 'commutation' mean? Is it limited to thyristors only, or is used for...

What does the term 'commutation' mean? Is it limited to thyristors only, or is used for all switching devices?

We know that there are two types of commutations, natural and forced commutations. Are there natural commutations for MOSFETs, BJTs and all those low power switches? If yes, what are those natural commutations? Also, what are the forced commutations of those switches?

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Answer #1

Commutation is defined as the process of Turning off a thyristor. Because once thyristor starts conducting, gate loses control over the device , therefore, external means may have to be adopted to commutate the thyristor.

Commutation is limited to Thyrisors only.

The Transistor devices such as BJTs (Bipolar Junction Transistor) and MOSFETs (Metal Oxide Field Effect Transistor) behave as controllable switches. These devices can be turned-on and turned-off by means of control signal.

BJT is a current controlled device.

MOSFET is a Voltage controlled device.

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