Novel zero-voltage switching techniques for pulse-width-modulated converters
Two new classes of soft switching pulse-width-modulated (PWM) converters, named zero-voltage-switched (ZVS) PWM converters and zero-voltage-transition (ZVT) PWM converters, are proposed. <p>The proposed ZVS-PWM converters combine the merits of conventional PWM and ZVS-QRC techniques. They are...
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ndltd-VTETD-oai-vtechworks.lib.vt.edu-10919-417432021-05-08T05:27:02Z Novel zero-voltage switching techniques for pulse-width-modulated converters Hua, Guichao Electrical Engineering Lee, Fred C. Chen, Dan Y. Jovanovic, Milan M. LD5655.V855 1991.H82 Electric current converters -- Research Switched capacitor circuits -- Research Two new classes of soft switching pulse-width-modulated (PWM) converters, named zero-voltage-switched (ZVS) PWM converters and zero-voltage-transition (ZVT) PWM converters, are proposed. <p>The proposed ZVS-PWM converters combine the merits of conventional PWM and ZVS-QRC techniques. They are capable of regulating the output for a wide load and input voltage range while maintaining constant-frequency operation. By employing a saturable inductor, the load range under which ZVS is maintained can be significantly extended without increasing the voltage stress of the power switch. The parasitic oscillations between the diode junction capacitance and the resonant inductor are also significantly reduced. <p>In the new class of ZVT-PWM converters, both the power switch and the rectifier diode are operated with zero-voltage switching, and are subjected to low voltage and current stresses associated with those in their PWM counterparts. Thus switching losses are significantly reduced at a slight increase in conduction losses. In addition, the circuit optimization is simplified because of constant-frequency operation. <p>The operation principles of the proposed converters are described by using several examples. Several breadboarded converters are implemented to verify the theoretical analysis and to demonstrate the feasibility of the proposed technologies. Master of Science 2014-03-14T21:32:09Z 2014-03-14T21:32:09Z 1991-05-28 2009-03-24 2009-03-24 2009-03-24 Thesis Text etd-03242009-040340 http://hdl.handle.net/10919/41743 http://scholar.lib.vt.edu/theses/available/etd-03242009-040340/ en OCLC# 24339343 LD5655.V855_1991.H82.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ iv, 79 leaves BTD application/pdf application/pdf Virginia Tech |
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LD5655.V855 1991.H82 Electric current converters -- Research Switched capacitor circuits -- Research |
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LD5655.V855 1991.H82 Electric current converters -- Research Switched capacitor circuits -- Research Hua, Guichao Novel zero-voltage switching techniques for pulse-width-modulated converters |
description |
Two new classes of soft switching pulse-width-modulated (PWM) converters,
named zero-voltage-switched (ZVS) PWM converters and zero-voltage-transition (ZVT)
PWM converters, are proposed.
<p>The proposed ZVS-PWM converters combine the merits of conventional PWM
and ZVS-QRC techniques. They are capable of regulating the output for a wide load
and input voltage range while maintaining constant-frequency operation. By employing
a saturable inductor, the load range under which ZVS is maintained can be significantly
extended without increasing the voltage stress of the power switch. The parasitic oscillations
between the diode junction capacitance and the resonant inductor are also significantly
reduced.
<p>In the new class of ZVT-PWM converters, both the power switch and the rectifier
diode are operated with zero-voltage switching, and are subjected to low voltage and
current stresses associated with those in their PWM counterparts. Thus switching losses
are significantly reduced at a slight increase in conduction losses. In addition, the circuit
optimization is simplified because of constant-frequency operation.
<p>The operation principles of the proposed converters are described by using several
examples. Several breadboarded converters are implemented to verify the theoretical
analysis and to demonstrate the feasibility of the proposed technologies. === Master of Science |
author2 |
Electrical Engineering |
author_facet |
Electrical Engineering Hua, Guichao |
author |
Hua, Guichao |
author_sort |
Hua, Guichao |
title |
Novel zero-voltage switching techniques for pulse-width-modulated converters |
title_short |
Novel zero-voltage switching techniques for pulse-width-modulated converters |
title_full |
Novel zero-voltage switching techniques for pulse-width-modulated converters |
title_fullStr |
Novel zero-voltage switching techniques for pulse-width-modulated converters |
title_full_unstemmed |
Novel zero-voltage switching techniques for pulse-width-modulated converters |
title_sort |
novel zero-voltage switching techniques for pulse-width-modulated converters |
publisher |
Virginia Tech |
publishDate |
2014 |
url |
http://hdl.handle.net/10919/41743 http://scholar.lib.vt.edu/theses/available/etd-03242009-040340/ |
work_keys_str_mv |
AT huaguichao novelzerovoltageswitchingtechniquesforpulsewidthmodulatedconverters |
_version_ |
1719403467001298944 |