A three-phase full converter supplied from a 230 V source is working as a line commutated inverter. The load consists of RLE type with R = 5 Ω, E = 200 V and L = 1 mH. A continues current of 10 A is flowing through the load, find the value of the firing angle delay.
A three-phase full converter is driving a DC motor. If a continues current of Im amperes is flowing through the motor load, then find the rms value of supply current drawn by the converter to drive the motor.
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In the below given circuit, each SCR and diode conduct for
In the below given circuit, __ and __ conduct along with T2.
In a 3 – φ semi converter, for firing angle equal to 125° and extinction angle equal to 105°, each SCR and freewheeling diode conduct respectively for
A three phase Bridge rectifier as shown.
Which is more suitable sequence of operation for maximum out put
A 3-phase full converter feeds power to an R load of 10 Ω. For a firing angle delay of 30° the load takes 5 kW. An inductor of large value is also connected to the load to make the current ripple free. Find the value of per phase input voltage.
A three-phase semi-converter circuit is given a supply of 400 V. It produces at the output terminals an average voltage of 381 V. Find the rectification efficiency of the converter circuit.
In a 3-phase semi-converter, for firing angle less than 60° the freewheeling diode conducts for
In a 3-phase full wave converter, if V is the maximum value of line voltage at the input, then each SCR is subjected to a peak negative voltage of
A three phase full converter is supplying a purely resistive load at 400V d.c. for 30° firing angle. The output
voltage for 90° firing angle would be
The effect of source inductance on the performance of a 3-phase controlled converter is to
Which of the following converter circuits would require a neutral point?
A 12 pulse rectifier output generated with minimum and maximum value of _________
A 3-phase bridge converter is given a three-phase supply in the phase sequence R-Y-B. Let the neutral to R phase voltage be Vm sinωt. The first SCR (connected to R phase) is fired at an angle of 15°. What is the maximum value at the output terminals at this instant?
The PIV experienced by each SCRs in M-3 converter is __________ times that in a 3-phase full converter having the same output voltage.
In a 3φ converter and inverter circuit as shown in figure Vs = 400 V
A 3-phase full converter has an average output voltage of 365 V for zero degree firing and resistive load. For a firing angle of 90 degree, the output voltage would be