Electrically heatable windshield heater control circuit

Details Electrically heatable windshield heater control circuit Electrically heatable windshield heater control circuit

1979-10-09

1981-05-12

Goldberg, Elliot

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219497, 219519, 219203, 322 8, 322 24, B60L 102, H02J 714

Patent

active

042674336

ABSTRACT:
A control circuit for supplying power to the heater of an electrically heatable windshield of an automotive vehicle while simultaneously providing the requisite current for the standard electrical system of the vehicle includes a resistive heating element connected in series between the vehicle alternator output and the high voltage terminal of the vehicle battery, so that current conducted through the heating element is supplied to both the battery and the load circuit. A control circuit, responsive to the alternator output voltage and the battery voltage, controls a voltage regulator to regulate the alternator output voltage within a first narrow band corresponding to the rated battery voltage and within a second narrow band corresponding to a given power rating for the heater.

REFERENCES:
patent: 3300619 (1967-01-01), Nilssen
patent: 3469073 (1969-09-01), Zechin
patent: 3571560 (1971-03-01), Nilssen et al.
patent: 3752348 (1973-08-01), Dickason et al.
patent: 3944893 (1976-03-01), Hayden
patent: 4084126 (1978-04-01), Clements
patent: 4100474 (1978-07-01), Pfeffer et al.
patent: 4117390 (1978-09-01), Iwata et al.
patent: 4141613 (1979-02-01), Mori et al.
patent: 4143313 (1979-03-01), Arendt
patent: 4188527 (1980-02-01), Follmer

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