Answered: Problem # 1: Three-Phase Six-Step DC-AC…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Problem # 1: Three-Phase Six-Step DC-AC Inverter

(1a) A three-phase inverter has an input DC voltage of 600 V. Draw up a table of the different possible switching modes.

[1b] For the switching modes in [1a] above determine line –line voltages Vab if the load is balanced.

[1c] A three-phase inverter with a DC input of 600 Volts is operating in the six-step, 180 degree conduction mode to generate a three-phase voltage set with a fundamental frequency of 60 Hz across a three-phase unbalanced resistive load. The load impedances are Ra = 8 Ohms, Rb = 15 Ohms and Rc = 25 Ohms.

Do calculations for all the six modes of operation and then

[1d] Plot the phase ‘b’ to neutral voltage of the load for a period

[1e] Plot the phase ‘a’ line current for a period

[1f] Plot the input DC current and find the average input current

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