Multiphase choppers are used in
In a single phase converter using a centre tapped transformer and with a highly inductive load, the firing angles is a. Each thyristor conducts for a period
In a parallel inverter
A step up chopper can give an output voltage
The specified maximum junction temperature of thyristors is about
A bridge type single phase cycloconverter changes the frequency f to f/3. Then one half wave of output contains
A half bridge inverter
A 3 phase series inverter has
In figure, thyristor Th is in off state. When thyristor is turned on, the peak thyristor current can be
HVDC systems are preferable for only long distances.
Surge current rating of an SCR is
Which of the following devices has metal-silicon junction?
In a single phase full wave converter (M-2 connection) feeding on R-L load the input voltage is v = Vm sin ωt. The expression for rms output voltage is
A dc chopper is feeding an RLE load. The condition for maximum ripple is
In a series inverter
The total number of leads in SUS, SBS and SCS respectively are
Which of these devices can conduct in both directions?
Assertion (A): A half wave controlled rectifier has poorer efficiency and higher ripple factor than a full wave controlled rectifier.
Reason (R): The use of a freewheeling diode in half wave controlled rectifier circuit improves the waveform of load current and circuit power factor.
A 3 phase dual converter consists of
Which inverter circuit uses coupled inductors?
When an SCR is in forward blocking mode, the applied voltage
In sinusoidal PWM for inverters the width of different pulses are not the same.
A class D chopper
The symbol in figure is for
The efficiency of a chopper circuit is about