Lighting device of discharge lamp
Provided is a discharge lamp lighting device provided with a neutral point type stepdown noninverting inverter, having a simple circuit configuration and few higher harmonic wave. This discharge lamp lighting device is provided with a bridge rectifying/converting circuit formed by parallel connectio...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
23.02.2005
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Summary: | Provided is a discharge lamp lighting device provided with a neutral point type stepdown noninverting inverter, having a simple circuit configuration and few higher harmonic wave. This discharge lamp lighting device is provided with a bridge rectifying/converting circuit formed by parallel connection of a series circuit of a pair of switching elements switching by high frequency by turns and a series circuit of a pair of rectifying devices, and connected with a low-frequency AC power supply AC between AC input ends between a junction of the switching elements and a junction of the rectifying devices, a chopper circuit containing at least one of a counter-electromotive force feedback circuit with inductors inserted in a position on a circuit through which the low-frequency AC current and high frequency current flow bidirectionally and switching elements, a resonant circuit RC resonating with high-frequency voltage, and a discharge lamp to which the resonance voltage is applied. |
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Bibliography: | Application Number: CN200410058241 |