Method for designing resonance parameters of resonant converter for electrodeless lamp

A resonant converter and resonant parameter technology, which is applied in the field of resonant parameter design of resonant converters for electrodeless lamps, can solve the problems of not considering the working state of the electrodeless lamp and not conforming to the working condition of the load of the electrodeless lamp, etc.

Inactive Publication Date: 2014-01-29
FUZHOU UNIV
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  • Application Information

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Problems solved by technology

The parameter design of the resonant circuit of the traditional resonant converter is mostly based on the fundamental wave analysis method. The natural resonant frequency expressions used in the analysis and design are obtained by assuming that the converter works in an open circuit state, ignoring the load equivalent

Method used

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  • Method for designing resonance parameters of resonant converter for electrodeless lamp
  • Method for designing resonance parameters of resonant converter for electrodeless lamp
  • Method for designing resonance parameters of resonant converter for electrodeless lamp

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Embodiment Construction

[0053] The resonance parameter design method of the resonant converter for the electrodeless lamp of the present invention, for the high-frequency LCCL resonant converter (such as figure 1 shown), where the half-bridge inverter circuit consists of a switching tube Q 1 and Q 2 Composition, the series and parallel resonant circuit is composed of resonant inductor L r , resonant capacitor C r , DC blocking capacitor C b and excitation inductance L c Composed of, the coupled coil consists of the excitation inductance L c Composed of the plasma discharge ring of the electrodeless lamp tube, the plasma discharge ring and the exciting inductance coil with the number of turns Nc can be equivalent to a coupling coefficient of k The transformer, in which the exciting inductance coil is equivalent to the primary winding of the transformer, and the plasma discharge ring is equivalent to the single-turn winding of the secondary side of the transformer, when the DC blocking capaci...

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Abstract

The invention relates to a method for designing resonance parameters of a resonant converter for an electrodeless lamp. The high-frequency LCCL resonant converter is composed of a half-bridge inverter circuit, a series-parallel resonant loop and a coupling coil, wherein the half-bridge inverter circuit is composed of a switch tube Q1 and a switch tube Q2, the series-parallel resonant loop is composed of a resonant inductor Lr, a resonant capacitor Cr, a blocking capacitor Cb and an excitation inductor Lc, and the coupling coil is composed of the excitation inductor Lc and an electrodeless lamp tube plasma discharging ring. After values of the Cb and the Lc are determined, the resonant parameters Lr and Cr are determined through a formula. In the formula, Leq and Req express an equivalent inductor and an equivalent resistor of the coupling ring auxiliary edge lamp tube plasma discharging ring mapped to the original edge, f expresses the work frequency of the resonant converter, and fo expresses the natural resonance frequency of the resonant loop. According to the method, it can be guaranteed that when the natural resonance frequency of the circuit is changed, ZVS soft switching of the electrodeless lamp can be still achieved, and the maximum power is output.

Description

technical field [0001] The invention relates to the technical field of resonant converter design, in particular to a method for designing resonance parameters of a resonant converter for an electrodeless lamp. Background technique [0002] Increasing the switching frequency can reduce the volume and weight of magnetic components such as inductors and transformers, and increase the power density of the converter. However, with the increase of the switching frequency, the resulting loss of the switching tube seriously affects the working efficiency of the circuit and the service life of the switching device. The high-frequency resonant converter can realize zero voltage switching (ZVS) or zero current switching (ZCS) of the switching tube by using its own resonance characteristics, and has the advantages of low switching loss, high efficiency, and low EMI Etc. Therefore, high-frequency resonant converters are widely used, and electronic ballasts for electrodeless lamps are t...

Claims

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Application Information

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IPC IPC(8): H05B41/28
CPCY02B20/22Y02B20/00
Inventor 林国庆沈豫
Owner FUZHOU UNIV
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