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Stable high frequency high-pressure discharge lamp lighting device avoiding acoustic resonance
Stable high frequency high-pressure discharge lamp lighting device avoiding acoustic resonance
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机译:稳定的高频高压放电灯照明装置,避免共振
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摘要
A lighting device for a high-pressure discharge lamp includes an inverter circuit for converting a DC voltage into an AC voltage using a pair of switching elements. The switching elements have a switching frequency for starting the high-pressure discharge lamp that is higher than a resonance frequency of a series resonance circuit connected in parallel with the discharge lamp. However, in a lighted state of the discharge lamp, the switching frequency is lower than the resonance frequency of the resonance circuit and is within a frequency range where acoustic resonance does not occur. The lighted state of the high-pressure discharge lamp is maintained by a voltage across a capacitor in the series resonance circuit.
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