(b) A three-phase fully controlled bridge rectifier is delivering a constant DC current of 50A to load from a 415V, 50Hz

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B A Three Phase Fully Controlled Bridge Rectifier Is Delivering A Constant Dc Current Of 50a To Load From A 415v 50hz 1 (32.96 KiB) Viewed 33 times

(b) A three-phase fully controlled bridge rectifier is delivering a constant DC current of 50A to load from a 415V, 50Hz three phase source with a source inductance of 4.8mH per phase (and negligible source resistance). Neglecting the Thyristor forward voltage drop, for a firing angle of 45° determine: (1) The mean output voltage of the circuit 16] The overlap angle (ii) 161 EX V - (2) sin The generalised mean output voltage of a p-pulse converter is given by the expression: p. cosa - PX The generalized expression of mean voltage with overlap angle y is expressed as follows: 0)) {cosa + cos(a + r)] 1. SpVmax sin (C) With the aid of appropriate sketches, discuss how a pulse width modulated control signal with variable duty cycle can be generated to control a dc/dc converter. 16]