Circuit for detecting the inter-phase voltage of an alternator f

Details Circuit for detecting the inter-phase voltage of an alternator f Circuit for detecting the inter-phase voltage of an alternator f

1992-06-17

1994-10-18

Callahan, Timothy P.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

307494, H03K 524

Patent

active

053571860

ABSTRACT:
A detection circuit for detecting the voltage between phases of a polyphase alternator for the purpose of controlling the putting into operation of a regulator for regulating the charging of a motor vehicle battery by said alternator, the circuit comprising differential discrimination means for the amplitude of the voltage between a pair of phase signals delivered by the alternator. The differential discrimination means comprise a pair of transistors each constituting means for comparing the inter-phase voltage with a threshold voltage defined by its emitter-base junction voltage, said threshold voltages being of small magnitude and of opposite polarity with respect to each other.

REFERENCES:
patent: 3588710 (1971-06-01), Masters
patent: 4791313 (1988-12-01), Kno et al.
Fairchild Semiconductor (A Fact Program Product) Sep. 1965.

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