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d) A three-phase rectifier can operate with different load types at the output. One possibility is placement of a capacitor across the output. Explain when this is done and why?

d) A three-phase rectifier can operate with different load types at the output. One possibility is placement of a capacitor across the output. Explain when this is done and why?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Just need the answer to question 4 thanks

QA.2 a) b) c) d) A 480 V permanent-magnet excited DC motor has armature resistance of 1.5 . When driving a load of constant load torque at rated speed of 1200 rpm, the armature takes rated 20 A. Speed is controlled by armature voltage variation, and armature is supplied from a three-phase fully controllable bridge rectifier. Available AC voltage is three-phase 415 V, 50 Hz, interfacing transformer is not used, and armature current is continuous. The machine operates at rated speed with rated load. Determine rectifier output voltage and thyristor firing angle. Determine the rated motor torque and power. The machine operates at 25% of the rated speed with 75% of the rated load. Determine rectifier output voltage and the thyristor firing angle. A three-phase rectifier can operate with different load types at the output. One possibility is placement of a capacitor across the output. Explain when this is done and why?
Transcribed Image Text:QA.2 a) b) c) d) A 480 V permanent-magnet excited DC motor has armature resistance of 1.5 . When driving a load of constant load torque at rated speed of 1200 rpm, the armature takes rated 20 A. Speed is controlled by armature voltage variation, and armature is supplied from a three-phase fully controllable bridge rectifier. Available AC voltage is three-phase 415 V, 50 Hz, interfacing transformer is not used, and armature current is continuous. The machine operates at rated speed with rated load. Determine rectifier output voltage and thyristor firing angle. Determine the rated motor torque and power. The machine operates at 25% of the rated speed with 75% of the rated load. Determine rectifier output voltage and the thyristor firing angle. A three-phase rectifier can operate with different load types at the output. One possibility is placement of a capacitor across the output. Explain when this is done and why?
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