Title:
CURRENT LIMITING POWER CONTROLLER FOR DC CIRCUIT
Document Type and Number:
Japanese Patent JPS63214814
Kind Code:
A
Abstract:
A solid state switching circuit is provided with a first power sharing circuit (20) which incorporates resistive power dissipation elements so that the required dissipated power is shared between a main power transistor (Q1) and the power sharing circuit. A second power sharing circuit (22) is connected in parallel with a portion of the first power sharing circuit and operates to provide additional resistive power dissipation under certain switch voltage conditions. The use of this second power sharing circuit permits an increase in the required trip time of the main switching transistor or improves the reliability of the power transistors in the main circuit and the first power sharing circuit by lowering transistor stress during transient conditions.
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Inventors:
MAAZA AKUMARU BETSUGU
Application Number:
JP2862488A
Publication Date:
September 07, 1988
Filing Date:
February 09, 1988
Export Citation:
Assignee:
WESTINGHOUSE ELECTRIC CORP
International Classes:
G05F1/569; G05F1/59; G05F1/66; H02H9/02; (IPC1-7): G05F1/66; H02H9/02
Attorney, Agent or Firm:
Soga Doteru (6 people outside)