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Title: Base drive circuit for a four-terminal power Darlington

Abstract

A high power switching circuit which utilizes a four-terminal Darlington transistor block to improve switching speed, particularly in rapid turn-off. Two independent reverse drive currents are utilized during turn off in order to expel the minority carriers of the Darlington pair at their own charge sweep-out rate. The reverse drive current may be provided by a current transformer, the secondary of which is tapped to the base terminal of the power stage of the Darlington block. In one application, the switching circuit is used in each power switching element in a chopper-inverter drive of an electric vehicle propulsion system.

Inventors:
 [1];  [2]
  1. (Blacksburg, VA)
  2. (Salem, VA)
Issue Date:
Research Org.:
Virginia Polytechnical Institute and State University
OSTI Identifier:
864540
Patent Number(s):
4380795
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
DOE Contract Number:  
DEN 3-65
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
base; drive; circuit; four-terminal; power; darlington; switching; utilizes; transistor; block; improve; speed; particularly; rapid; turn-off; independent; reverse; currents; utilized; expel; minority; carriers; pair; charge; sweep-out; rate; current; provided; transformer; secondary; tapped; terminal; stage; application; element; chopper-inverter; electric; vehicle; propulsion; power switching; current transformer; base drive; electric vehicle; minority carrier; switching circuit; drive circuit; minority carriers; reverse drive; drive current; darlington transistor; vehicle propulsion; switching speed; switching element; drive currents; /363/318/

Citation Formats

Lee, Fred C., and Carter, Roy A. Base drive circuit for a four-terminal power Darlington. United States: N. p., 1983. Web.
Lee, Fred C., & Carter, Roy A. Base drive circuit for a four-terminal power Darlington. United States.
Lee, Fred C., and Carter, Roy A. Sat . "Base drive circuit for a four-terminal power Darlington". United States. https://www.osti.gov/servlets/purl/864540.
@article{osti_864540,
title = {Base drive circuit for a four-terminal power Darlington},
author = {Lee, Fred C. and Carter, Roy A.},
abstractNote = {A high power switching circuit which utilizes a four-terminal Darlington transistor block to improve switching speed, particularly in rapid turn-off. Two independent reverse drive currents are utilized during turn off in order to expel the minority carriers of the Darlington pair at their own charge sweep-out rate. The reverse drive current may be provided by a current transformer, the secondary of which is tapped to the base terminal of the power stage of the Darlington block. In one application, the switching circuit is used in each power switching element in a chopper-inverter drive of an electric vehicle propulsion system.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

Patent:

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