Question

In 3-Φ Fully controlled rectifier calculate the average value of the voltage if the supply is 400 V and firing angle is 15°.

(a) 521.2 V

(b) 522 V

(c) 523 V

(d) 524 V

The question was asked in class test.

The above asked question is from Solid State Controlled Drives topic in section Introduction to Solid State Controlled Drives of Electric Drives

Answer 1

Correct answer is (b) 522 V

Explanation: In 3-Φ Fully controlled rectifier, the average value of the voltage is 3Vml(cos(∝))÷π=3×400×√2(cos(15°))÷3.14=522 V.