Base drive circuit for a four-terminal power darlington

Patent · Tue Apr 19 00:00:00 EST 1983

OSTI ID:6239593

Carter, R A; Lee, F C

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.

• Assignee: Dept. Of Energy
• Patent Number(s): US 4380795
• OSTI ID: 6239593
• Resource Relation: Patent File Date: Filed date 24 Mar 1981; Other Information: PAT-APPL-246975
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
TRANSISTOR SWITCHING CIRCUITS
DESIGN
ELECTRIC-POWERED VEHICLES
PROPULSION
ELECTRONIC CIRCUITS
SWITCHING CIRCUITS
VEHICLES
330600* - Advanced Propulsion Systems- Vehicle Design Factors