Ignition for ceramic metal halide high frequency ballasts

H - Electricity – 05 – B

Patent

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Details

H05B 41/14 (2006.01) H05B 41/233 (2006.01)

Patent

CA 2724509

A high frequency ballast for a metal halide lamp comprises a controller, a switch, and an oscillator. The controller selectively enables and disables the oscillator via the switch to ignite the lamp. The switch is in a power supply loop of the oscillator and selectively open circuits and close circuits the power supply loop. When the switch close circuits the power supply loop, the oscillator oscillates and provides power to the lamp. When the switch open circuits the power supply loop, the oscillator does not oscillate and does not provide power to the lamp.

L'invention porte sur un ballast haute-fréquence pour lampe à halogénures métalliques. Le ballast comporte un dispositif de commande, un interrupteur et un oscillateur. Pour allumer la lampe, le dispositif de commande active et désactive sélectivement l'oscillateur au moyen dun interrupteur. L'interrupteur se trouve dans une boucle d'alimentation électrique de l'oscillateur et ouvre et ferme de façon sélective le circuit de la boucle d'alimentation électrique. Lorsque l'interrupteur ferme le circuit de la boucle d'alimentation électrique, l'oscillateur oscille et fournit de l'énergie à la lampe. Lorsque l'interrupteur ouvre le circuit de la boucle d'alimentation électrique, l'oscillateur n'oscille pas et ne fournit pas d'énergie à la lampe.

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