Based on T type filter, the new ballast can achieve a wide dimming range with a very narrow frequency variation range, and it can operate with low lamp current crest factor.
基于T型滤波器的调光方法，能在很窄的工作频率范围内实现深度调光，同时具有灯电流波峰因数低的优点。
Traditional ballast components of inductance ballast has some disadvantages which include large volume, high self consumption, low power factor and difficult to adjust.
传统的高压钠灯配备的是电感式镇流器，其体积大，本身功耗大、功率因数低、调光困难等。
The paper discusses the action of computer aided analysis program in the research on high power factor electronic ballast by using PSPICE.
以PSPICE通用电路分析软件在高功率因数电子镇流器设计中的应用为例，分析了计算机辅助分析软件在工程应用中的作用。
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