| The EDL (electrodeless discharge lamp) was one of the new light sources invented in the 1990's. With its'unique characteristics such as high luminous efficiency, long life cycle, high color rendering, high color temperature and green initiative products, EDL will be play an important role in the lighting market and been used in the civil engineering fields including super markets, public palaces and road illumination. However, Comparing to the effective luminous efficacy of up to 801m/W, the life cycle of up to 100,000 hours, color rendering index as high as 80Ra and virtually eliminating stroboscopic phenomenon, under a high operating frequency of 2.2MHz or more, EDL is in a unique position in the applications among traditional electric light sources market. Along with the above advantages of EDL, the components in power supply must be in high quality and characters, such as magnetic components and related parameters and so on, which detain their mass production, and caused by relatively high cost, limit its'application. So the paper started to reduce power supply cost and product stability research against this background.The EDL is composed of the high frequency generator, power coupler and lamp, and the core part of EDL is the high frequency electrical circuit in which magnetic component is one of the important components of the resonant circuit. However, in practical application, magnetic components and related parameters of discreteness, resulting in resonant circuit can't be kept in a stable state and magnetic components will turn to be warm and heated. In this paper, based on theoretical analysis of EDL power supply topology, high frequency generator topology, and combined with two-stage topology, parallel resonant series load topology and self-excited to start the way, high frequency electrical circuit is analyzed and simulated in detail the following conclusions are listed as follows:1) The inductance, capacitance and resistance in the high frequency electrical circuit will affect the resonant state of the circuit.2) The high frequency electrical circuit of magnetic components in different working conditions, the heat generated from the magnet components is different, so inductive devices must be given enough attention in order to solve this kind of problem.3) All parameters associated with values of components are to be verified by EWB software simulation.4) By using of the relative measurement, the resonant circuit under high frequency and parameters were to be sit up through experiment, the experiment results show that this method can be used to evaluate the performance of EDL power supply.5) The orthogonal experimental method was to be used to determine the best discrete values under high frequency electrical circuit.Parameters with different value and type of components were selected and compared with different working condition based on experiment such as stability test of power supply. The parameters in the magnetic circuit of high frequency generator was determined:resistance 240-430Ω, capacitance 240-470pF, inductance of the high frequency transformer primary winding 1.69-1.89μH,secondary winding 1.13～1.23μH, and power factor above 0.9, natural frequency and oscillation circuit frequency matching, power transmission higher efficiency. The measurement of stability of EDL has been built up and the result and methods can meet the requirement of the national metrological rules JJG-211-2005. The electrical parameters and magnetic parameters match the range of parameters. Finally the magnetic circuit and electrical parameters of the power supply were optimized by the orthogonal test method, and given the best combination of parameter matching.
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