Which of the following statements is correct with reference to a two-quadrant converter?

Polarity of current can reverse but polarity of voltage cannot reverse
Polarity of voltage and current is always negative
Polarity of current and voltage are always the same
Polarity of voltage can reverse but polarity of current cannot reverse

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 4 : Polarity of voltage can reverse but polarity of current cannot reverse

Quadrant operation of a rectifier:

A 1ϕ full-wave rectifier provides two-quadrant operation, i.e. motoring action and generating action.
The motoring action is achieved in the first quadrant for α < 90°
The generating action is achieved in the second quadrant for α > 90°.
In a two-quadrant converter, the polarity of voltage can be reversed for α < 90° but the polarity of current cannot be reversed.
During the motoring action, power flows from the source to the RLE load.
During the generating action, the polarity of back emf in RLE load gets reversed, so power starts flowing from load to source.

4 views Answered 2022-09-04 04:29

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