POWER CIRCUIT WITH OVERVOLTAGE DETECTING CIRCUIT

PURPOSE:To obtain a power circuit whose overvoltage detection level is varied automatically by providing a window comparator and varying an output voltage. CONSTITUTION:The window comparator 8 has an input terminal P3 connected to a variable stabilized reference power source E1 and an input terminal...

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Bibliographic Details
Main Authors YAMAJI KIMINORI, YAEJIMA MAMORU
Format Patent
LanguageEnglish
Published 02.10.1986
Subjects
CONTROLLING
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
TESTING
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Summary:PURPOSE:To obtain a power circuit whose overvoltage detection level is varied automatically by providing a window comparator and varying an output voltage. CONSTITUTION:The window comparator 8 has an input terminal P3 connected to a variable stabilized reference power source E1 and an input terminal P4 connected to a reference voltage source E2 which has a constant voltage. Further, a voltage E3 obtained by dividing a power source output voltage through resistances R5 and R6 is applied to an input terminal P5. The base of a TR 9 is connected to an output terminal P2 and a resistance 8 and the gate of a thyristor 10 are connected to the collector of the TR 9. Then when the power source E1 is varied to vary its output voltage E0, a reference voltage E1+E2 for overvoltage detection varies simultaneously with the variation of the power source E1, so an overvoltage detection voltage E0V=(E1+E2)X(R5+R6)/R6 also varies automatically. Consequently, a complicated procedure is not necessary for overvoltage resetting.
Bibliography:Application Number: JP19840180522