Single-tube resonance type electronic ballast for gas discharge lamp

Abstract

The invention relates to a single-tube resonant type electronic ballast for a gas discharge lamp. An overall electric energy transmission scheme of AC-DC-AC (alternating current-direct current-alternating current) is used. An inverter circuit mainly comprises an isolating diode VD5, an LC resonance network formed by an inductor L2 and a capacitor C3 which are in parallel connection, a switch tube VT0 and a flyback diode VD0. A lamp load FZ is in serial connection with a capacitor C20 for ballasting. A soft switch working manner which is of zero voltage switching-on is used by the switch tube VT0. A pulse-width adjusting potentiometer R10 is used to adjust switching-on time of the switch tube VT0 so as to achieve the purpose of dimming. The switching-on time of the switch tube VT0 is modulated by low frequency, so that the acoustic resonance problem of the high-intensity gas discharge lamp is solved.

Description

technical field [0001] The invention provides a brand-new electronic ballast for single-tube resonant dimmable gas discharge lamp, which relates to the technical field of electric energy conversion electronic ballast for gas discharge lamp. A switch tube, by controlling and adjusting the conduction time of the switch tube of the main circuit, the purpose of dimming the lamp load and eliminating acoustic resonance is achieved. Background technique [0002] Gas discharge lamps are widely used due to their remarkable energy-saving effects. The existing electronic ballasts for gas discharge lamps use power conversion technology to generate high-frequency electric energy to drive the load of gas discharge lamps under the coordinated drive of several switching tubes. The main circuit includes multiple switching tubes and inductance coils, resulting in complex circuit structure, a lot of materials, and high cost. Because it is not convenient to control each switching tube separatel...

AI Technical Summary

Problems solved by technology

[0002] Gas discharge lamps are widely used due to their remarkable energy-saving effects. The existing electronic ballasts for gas discharge lamps use power conversion technology to generate high-frequency electric energy to drive the load of gas discharge lamps under the coordinated drive of several switching tubes. The main circuit includes multiple switching tubes and inductance coils, resulting in complex circuit structure, a lot of materials, and high cost. Because it is not convenient to control each switching tube separately, many existing electronic ballast technical solutions for gas discharge lamps do not have Feasibility of dimming the lamp, those electronic ballasts with dimming function are restricted by their own technical solutions, so the circuit structure is very complicated, the cost is high, and the price is expensive, especially for high-intensity gas discharge lamps with acoustic resonance problems , the circuit structure of its electronic ballast is very complicated, and the cost and price are very high

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