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A new open-loop measurement system has been built up to test the stability of metal halide (abbr. MH) lamps in this paper. Based on the new measurement system, a lot of small power MH lamps (70 W) have been tested and arrived at the followings conclusions: 1) the acoustic resonance of MH lamp is caused by itself while it operates in high frequency; 2) the stable operating frequency range is about...
A novel design method - narrow control bandwidth for the PT power converter has been proposed according to the electrical characteristics and the operation features of PT. The method has been proved through the input matching network of PT. The main contributions are as follows: 1) The functions of the input matching network has been analyzed; the design method has been put forward and the parameters...
According to the operating and efficiency properties of piezoelectric-transformer, an input matching network (abbrev. IMN) attached to it is proposed in this paper. The main contributions are as follows: (1) The operating principles of piezoelectric-transformer are analyzed and its IMN is put forward. This enable piezoelectric-transformer converter operating area close to the resonant frequency as...
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