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基于压电变压器的高压能源变换器负载频率特性

Keywords: 压电变压器,高电压低电流能源变换器,负载频率特性

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Abstract:

为研究压电变换器在高电压低电流能源变换中充电的负载频率特性,利用集总参数压电变压器等效电路模型分析了压电变压器的负载频率特性,说明工作频率随负载的增大逐渐增大,最终达到饱和.以KHMPT3206压电变压器为实验对象,在负载小于50kΩ时,理论分析与实验结果相吻合,大于50kΩ时相对误差逐渐增加,最大相对误差为2.5%.验证了等效集总参数电路模型建立的正确性,即负载的变化影响等效串联电容的大小,从而引起压电变压器工作频率发生变化.

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