Step sinusoidal voltage controlling method for hid,...

Details Step sinusoidal voltage controlling method for hid,... Step sinusoidal voltage controlling method for hid,...

2007-11-06

2007-11-06

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S299000, C315S308000, C315S362000, C307S115000, C307S130000, C307S131000

Reexamination Certificate

active

10596551

ABSTRACT:
A step voltage controlling device and method for High Intensity Discharge (HID) light dimming applications includes an autotransformer, voltage sensing block, current sensing block, pulse forming block, microprocessor control unit (MCU) block and plural three switch blocks which allows an instantaneous variation of the voltage applied to the load which is controlled to be synchronized with the load current zero crossing point.

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patent: 4673888 (1987-06-01), Engelmann et al.
patent: 4716357 (1987-12-01), Cooper
patent: 4873617 (1989-10-01), Fredrick et al.
patent: 4873618 (1989-10-01), Fredrick et al.
patent: 5500575 (1996-03-01), Ionescu
patent: 5714847 (1998-02-01), Lindauer et al.

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