Power Electroni...

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 current ripple free. The value of per phase input voltage is ________ (in V) 

A 3-phase full converter delivers a ripple free load current of 10 A with a firing angle delay of 45°. The input voltage is 3-phase, 400 V, 50 Hz. The value of 2^nd harmonic source current amplitude is _______

A three-phase uncontrolled diode rectifier supplies a constant load current of 10 A and its supply voltage is 400 V line to line. The supply fundamental rms current is ______

A 3-phase full bridge diode rectifier is fed from delta-star transformer. The voltage fed to the rectifier has a maximum value of V₂ from line to neutral so that the voltage of phase ‘a’ is V_a = V_m sin ωt. The phase sequence is a-b-c. At the instant the phase ‘a’ voltage is passing through zero, what will be the rectifier output voltage?

A step-down delta-star transformer, with per-phase turns ratio of 5 is fed from a 3-phase 1100 V, 50 Hz source. The secondary of this transformer is connected through a 3-pulse type rectifier, which is feeding on R load. The average value of output voltage is _______ (in V)

A three-phase fully controlled bridge converter is supplied from 400 V, 50 Hz, three-phase mains and operates at a firing angle 45°. If the current on load side is constant at 8 A and the load voltage is 320 V, the value of source inductance is _______ (in mH)

A 200 V, 1450 RPM, 100 A separately excited dc machine has an armature resistance of 0.04 Ω. The machine is driven by a three-phase half-controlled converter operating from a three phase 220 V, 50 Hz supply. The motor operates at the rated speed and rated torque. Assuming continuous conduction. The input distortion factor is _______

A three-phase half wave rectifier supplied by a 220 V(rms) at 50 Hz and the load is of 1 kW at 200 V. purely resistive. Power consumed by the load with given supply voltage is _______ (in W)

A three-phase fully controlled bridge converter is connected to a 415 V supply, having a source resistance of 0.3 Ω and inductance of 1.2 mH per phase. The converter is working in the inversion mode at a firing advance angle of 30°. What is the average generator voltage for the conditions: dc current I_d = 60 A, thyristor drop = 1.5 V and f = 50 Hz?

A fully controlled three phase bridge is operating in inverting mode from an ac supply of 220 V, 50 Hz. The source inductance per phase is 0.32 mH. If the converter is operating with an angle of firing advance of 30°, calculate the maximum current that can be commuted, allowing a recovery angle (or) overlapping angle of 5°.