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For α > 90°, 3-Φ Full wave bridge rectifier acts as a natural commutated inverter.(a) True(b) FalseThe question was posed to me by my college professor while I was bunking the class.Question is from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives

Answer»

The correct CHOICE is (a) True

For explanation: The output VOLTAGE of 3-Φ Full WAVE bridge rectifier is 3Vml(cos(∝))÷π. For α > 90° the output voltage BECOMES NEGATIVE. The power flows from DC to the AC side.



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