Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing
Patent
1975-11-25
1977-10-04
Miller, J D
Electricity: electrical systems and devices
Safety and protection of systems and devices
Circuit interruption by thermal sensing
361 98, H02H 720
Patent
active
040527441
ABSTRACT:
A circuit for monitoring semiconductor junction temperature includes means for obtaining a signal representing the current flowing through the semiconductor, a current controller, an electrical analog of the thermal system of the semiconductor, a direct current supply, and a voltage level detector. The current controller is connected in circuit with the analog and the combination to the d.c. supply. The current conducted by the controller via the analog is controlled by the signal such that the voltage across the analog indicates junction temperature and this voltage is monitored by means of the level detector.
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Boothman David R.
Elgar Everett C.
Canadian General Electric Company Limited
Miller J D
Renner Arnold E.
Salce Patrick R.
Schlamp Philip L.
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