Power-supply circuit apparatus for high pressure gas discharge l

Details Power-supply circuit apparatus for high pressure gas discharge l Power-supply circuit apparatus for high pressure gas discharge l

1992-05-28

1993-08-31

Pascal, Robert J.

Electric lamp and discharge devices: systems

Special application

Vehicle

315308, 315DIG7, 315205, 315209R, 315289, 315127, B60Q 102

Patent

active

052412423

ABSTRACT:
In a power-supply circuit apparatus for high pressure gas discharge lamps in motor vehicles which is fed from a vehicle battery wherein the power-supply circuit apparatus, which produces a lamp supply voltage and an ignition auxiliary voltage, has at least one voltage converter coupled to the vehicle battery and a vehicle ground connection and is electrically-conductively coupled to an ignition device for igniting and operating a high pressure gas discharge lamp, the lamp supply voltage and/or the ignition auxiliary voltage is produced by the voltage converter to be physically separated from the battery voltage of the vehicle battery and a reference voltage level for the ignition auxiliary voltage and/or the lamp supply voltage is coupled to the vehicle ground connection via a low-resistance first precision resistor for measuring purposes. This arrangement provides a power-supply circuit apparatus wherein people are best protected from electric shock when touching live parts of the power-supply circuit apparatus and wherein the power-supply circuit apparatus is safely protected from faults such as short circuits or excess currents.

REFERENCES:
patent: 4563719 (1986-01-01), Nilssen
patent: 4613934 (1986-09-01), Padolok
patent: 4724360 (1988-02-01), Luursema
patent: 4943886 (1990-07-01), Quazi
patent: 5047695 (1991-09-01), Allen et al.
patent: 5084653 (1992-01-01), Nilssen
patent: 5103143 (1992-04-01), Daub
patent: 5142203 (1992-08-01), Oda et al.

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