Example 1: A four-quadrant chopper operates with a switching frequency of 1kHz and supplies power to a dc motor whose armature EMF is -216 V. The input voltage of the chopper is 240 V. Find: (a) Voltage control ranges for the third and fourth quadrants of operation of the chopper (b) on-time and off-time of the modulating switch when the chopper operates in the third quadrant with the magnitude control ratio of -0.95 (c) on-time and off-time of the modulating switch when the chopper operates in the fourth quadrant with the magnitude control ratio of -0.75.
Example 1: A four-quadrant chopper operates with a switching frequency of 1kHz and supplies power to a dc motor whose armature EMF is -216 V. The input voltage of the chopper is 240 V. Find: (a) Voltage control ranges for the third and fourth quadrants of operation of the chopper (b) on-time and off-time of the modulating switch when the chopper operates in the third quadrant with the magnitude control ratio of -0.95 (c) on-time and off-time of the modulating switch when the chopper operates in the fourth quadrant with the magnitude control ratio of -0.75.
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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/ Example 1. A four- magnitude control ratio of —0.95 (c) on-time and off-time of the modulating swi magnitude control ratio of =075;
Transcribed Image Text:Example 1: A four-quadrant chopper operates with a switching frequency of 1kHz and supplies power to a
dc motor whose armature EMF is -216 V. The input voltage of the chopper is 240 V. Find:
(a) Voltage control ranges for the third and fourth quadrants of operation of the chopper
(b) on-time and off-time of the modulating switch when the chopper operates in the third quadrant with the
magnitude control ratio of-0.95
(c) on-time and off-time of the modulating switch when the chopper operates in the fourth quadrant with the
magnitude control ratio of -0.75.
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