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Title: Bidirectional buck boost converter

Abstract

A bidirectional buck boost converter and method of operating the same allows regulation of power flow between first and second voltage sources in which the voltage level at each source is subject to change and power flow is independent of relative voltage levels. In one embodiment, the converter is designed for hard switching while another embodiment implements soft switching of the switching devices. In both embodiments, first and second switching devices are serially coupled between a relatively positive terminal and a relatively negative terminal of a first voltage source with third and fourth switching devices serially coupled between a relatively positive terminal and a relatively negative terminal of a second voltage source. A free-wheeling diode is coupled, respectively, in parallel opposition with respective ones of the switching devices. An inductor is coupled between a junction of the first and second switching devices and a junction of the third and fourth switching devices. Gating pulses supplied by a gating circuit selectively enable operation of the switching devices for transferring power between the voltage sources. In the second embodiment, each switching device is shunted by a capacitor and the switching devices are operated when voltage across the device is substantially zero.

Inventors:
 [1]
  1. Niskayuna, NY
Issue Date:
OSTI Identifier:
871451
Patent Number(s):
5734258
Application Number:
08/657,249
Assignee:
General Electric Company (Schenectady, NY)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B60 - VEHICLES IN GENERAL B60L - PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES
H - ELECTRICITY H02 - GENERATION H02M - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS
DOE Contract Number:  
AC03-63CH10093
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
bidirectional; buck; boost; converter; method; operating; allows; regulation; power; flow; voltage; sources; level; source; subject; change; independent; relative; levels; embodiment; designed; hard; switching; implements; soft; devices; embodiments; serially; coupled; relatively; positive; terminal; negative; third; fourth; free-wheeling; diode; respectively; parallel; opposition; respective; ones; inductor; junction; gating; pulses; supplied; circuit; selectively; enable; operation; transferring; device; shunted; capacitor; operated; substantially; zero; respective ones; voltage levels; switching devices; voltage source; voltage level; switching device; voltage sources; soft switching; substantially zero; gating pulses; gating pulse; power flow; buck boost; boost converter; bidirectional buck; /323/

Citation Formats

Esser, Albert Andreas Maria. Bidirectional buck boost converter. United States: N. p., 1998. Web.
Esser, Albert Andreas Maria. Bidirectional buck boost converter. United States.
Esser, Albert Andreas Maria. Tue . "Bidirectional buck boost converter". United States. https://www.osti.gov/servlets/purl/871451.
@article{osti_871451,
title = {Bidirectional buck boost converter},
author = {Esser, Albert Andreas Maria},
abstractNote = {A bidirectional buck boost converter and method of operating the same allows regulation of power flow between first and second voltage sources in which the voltage level at each source is subject to change and power flow is independent of relative voltage levels. In one embodiment, the converter is designed for hard switching while another embodiment implements soft switching of the switching devices. In both embodiments, first and second switching devices are serially coupled between a relatively positive terminal and a relatively negative terminal of a first voltage source with third and fourth switching devices serially coupled between a relatively positive terminal and a relatively negative terminal of a second voltage source. A free-wheeling diode is coupled, respectively, in parallel opposition with respective ones of the switching devices. An inductor is coupled between a junction of the first and second switching devices and a junction of the third and fourth switching devices. Gating pulses supplied by a gating circuit selectively enable operation of the switching devices for transferring power between the voltage sources. In the second embodiment, each switching device is shunted by a capacitor and the switching devices are operated when voltage across the device is substantially zero.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {3}
}

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