Power Electronics Questions

• The power factor at the input terminals of a cyclo- converter is generally
• Modified Mc Murray full bridge inverter uses
• A fully controlled bridge converter feeds a highly inductive load such that the load current can be assumed to be constant. The wave shape of input current is
• The application of gate signal decreases the break over voltage of on SCR.
• Ripple factor RF and form factor FF are related as
• In integral cycle control of ac regulator, the input power factor is equal to
• A single phase fully controlled bridge converter is feeding an RLE load. Input voltage is Vm sin ωt and firing angle is a. If average current is I0, then
• In a 3 phase semiconverter, the output voltage becomes discontinuous for
• A static excitation system uses
• In a semi converter feeding a resistive load
• McMurrary full bridge inverter uses
• In an n stage high frequency series inverter having a time period T, each stage is active for a time interval of
• Assertion (A): Gate triggering is the most commonly used method for triggering of an SCR. Reason (R): Even a small gate current is sufficient to turn on an SCR.