Direct-current low-voltage gas-discharge lamp controller
A gas discharge lamp, DC low-voltage technology, applied in the direction of electric light source, electrical components, climate sustainability, etc., can solve the problems that discharge lamps are difficult to light, cannot be guaranteed to be solved, and the failure rate is high, so as to achieve stable current and improve lighting Stability, solve the effect of bulky circuit structure
Pending Publication Date: 2018-12-07
常州市引泉电子有限公司
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Problems solved by technology
The current usage is to light up the lamp under the AC inductive ballast, and then switch to the high-precision DC steady current circuit after the brightness is stable. To switch between bright and steady current, not only the circuit is more complex and the operation is cumbersome, but also the external connection method leads to greater loss and higher failure rate
[0010] In addition, regarding the lighting of the discharge lamp, because the discharge lamp has a leakage current, it will glow discharge when it is not lit, making it difficult to light the discharge lamp. Even if an external trigger is used, this problem cannot be guaranteed to be solved.
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[0027] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.
[0028] Such as figure 1 As shown, the present invention provides a DC low-pressure gas discharge lamp controller, including a rectification and filtering circuit for rectifying and filtering the input AC voltage, a transformer connected to the rectification and filtering circuit, a current sampling circuit, a control circuit, a trigger and an auxiliary The lighting circuit, the transformer is respectively connected to the trigger and the auxiliary lighting circuit, the current sampling circuit is used to transmit the obtained current signal to the control circuit, the control circuit is connected to the transformer, and the transformer is used to isolate the rectified and filtered AC voltage and output the auxiliary power supply and High-voltage power supply, the high-voltage power supply lights up the discharge lamp under the joint action of t...
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The invention discloses a direct-current low-voltage gas-discharge lamp controller comprising a rectification and filtering circuit for rectifying and filtering an inputted alternating-current voltage, a transformer, a current sampling circuit, a current control circuit, a triggering device and an auxiliary lighting circuit. The transformer, the current sampling circuit, the current control circuit, the triggering device and the auxiliary lighting circuit are connected with the rectification and filtering circuit. The current sampling circuit is configured to transmit an acquired current signal to the current control circuit; and the current control circuit is connected to the transformer. According to the invention, with the auxiliary lighting circuit and the built-in triggering device for joint auxiliary discharge lamp lighting, the lighting reliability of the discharge lamp is improved substantially; with the high-precision operational amplifier in the current control circuit, the current precision is enhanced; the discharge lamp is suitable for some high-precision analysis instruments; and since the controller is integrated with triggered lighting and current stabilizing functions, no external trigger is needed.
Description
technical field [0001] The invention relates to the technical field of low-pressure gas discharge lamp control, in particular to a DC low-pressure gas discharge lamp controller. Background technique [0002] Low-pressure gas discharge lamps with special metal elements: cadmium lamps, mercury lamps, sodium lamps (sodium lamps) and zinc lamps, etc., are mostly used in air pollution monitoring, analytical instruments, wavelength calibration, spectrometers, etc., in industry, agriculture, medical and health It is widely used in the field of scientific analysis and research. [0003] Cadmium lamp, a light source lamp, cadmium lamp spectral line 228.8nm, used to emit a specific spectrum for light source comparison or specific spectrum analysis. Low-voltage cadmium lamps and zinc lamps are the main light sources in the ultra-short-wavelength ultraviolet radiation region. Cadmium lamps and zinc lamps are mainly used in ultraviolet absorption instruments and detectors, and are often...
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IPC IPC(8): H05B41/16H05B41/36H05B41/26
CPCH05B41/16H05B41/26H05B41/36Y02B20/00
Inventor 王建平
Owner 常州市引泉电子有限公司