Power Electronics - Engineering

Q1:

An electric heater is controlled by thyristors through on-off control. If a = 0.4, the heating is

A 16% maximum

B 40% of maximum

C 60% of maximum

D 84% of maximum

ANS:B - 40% of maximum

Vl = V a. Therefore Vl2 - V2 (a). Heating is proportional to a.