| 摘要 |
<p>An electrodeless lamp ballast, mainly comprising: a DC/DC convertor, a closed loop detection module, a CPU and a high-frequency generator;wherein the high-frequency generator comprises a transformer T1, a capacitor C1, an electronic switch K1 and a diode D1. A serial LC resonance circuit is formed by a primary coil L1 of the transformer T1 and the capacitor C1, a secondary coil of the transformer T1 is connected to an electrodeless lamp, a node A is arranged between the transformer T1 and the capacitor C1, the node A is connected to the electronic switch K1 and an anode of the diode D1 in sequence, and a cathode of the diode D1 is grounded;and an output end of the DC/DC convertor is connected to an input end of the transformer T1, the output voltage of the DC/DC convertor is controlled by the CPU, the ON/OFF of the electronic switch K1 is controlled by the CPU, and waveform synchronization signals of the node A are provided for the CPU by the closed loop detection module.Energy can be sufficiently sent to a magnetic ring by the above-mentioned ballast structure, so that the ballast generates little heat or even does not generate heat, thereby prolonging the service life thereof.</p> |
