Low-temperature starting circuit of electrodeless lamp ballast and use method
A technology for starting circuits and electrodeless lamps, which is applied in the use of gas discharge lamps, electric light sources, electrical components, etc., and can solve the problems that electrodeless lamps cannot be normally lit.
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Embodiment 1
[0024] An embodiment of the present invention provides a low-temperature start-up circuit for an electrodeless lamp ballast, including: an input filter, a power factor correction PFC main power circuit, and a DC / AC inverter circuit, wherein the AC voltage passes through the input filter and the PFC main power circuit to become a DC voltage and enter the DC / AC inverter circuit, the DC / AC inverter circuit converts the DC voltage into an AC voltage and then inputs it to the electrodeless lamp, and the electrodeless lamp The low temperature starting circuit of the ballast also includes an electrodeless lamp detection module and a PFC bus voltage regulating circuit, the input end of the electrodeless lamp detection module is connected with the electrodeless lamp or the output end of the PFC main power circuit, and the electrodeless lamp detection module The output end of the PFC bus voltage regulating circuit is connected to the input end of the PFC bus voltage regulating circuit, a...
Embodiment 2
[0061] Such as image 3 As shown, the low-temperature starting circuit of the electrodeless lamp ballast provided by the embodiment of the present invention includes a PFC bus voltage regulating circuit, a PFC main power circuit, a DC / AC inverter circuit, a PFC bus voltage dividing circuit and an undervoltage detection logic circuit, in:
[0062] When the ballast is powered on for the first time, the PFC bus voltage regulation circuit sends a voltage regulation signal to the PFC main power circuit;
[0063] The PFC main power circuit receives the voltage regulation signal input by the PFC bus voltage regulation circuit, and increases the PFC bus voltage to prepare for the first lighting;
[0064] The DC / AC inverter circuit uses high-frequency switching conversion to invert the high voltage output by the PFC main power circuit from DC to AC, and supplies power to the electrodeless lamp;
[0065] The PFC bus voltage dividing circuit converts the PFC bus voltage of the PFC main...
Embodiment 3
[0082] Such as Figure 6 As shown, the low-temperature start-up circuit of the electrodeless lamp ballast provided by the embodiment of the present invention includes: PFC bus voltage regulation circuit, PFC main power circuit, DC / AC inverter circuit, lamp voltage / current detection circuit and logic comparison circuit, in
[0083] When the ballast is powered on for the first time, the PFC bus voltage regulation circuit sends a voltage regulation signal to the PFC main power circuit;
[0084] The PFC main power circuit receives the voltage regulation signal input by the PFC bus voltage regulation circuit, and increases the PFC bus voltage to prepare for the first lighting;
[0085] The DC / AC inverter circuit uses high-frequency switching conversion to invert the high voltage output by the PFC main power circuit from DC to AC, and supplies power to the electrodeless lamp;
[0086] The lamp voltage / current detection circuit detects the voltage or current of the electrodeless la...
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