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来源：百度知道 编辑：UC知道 时间：2024/06/06 03:29:54
There is an increasing demand for minimization of harmonic currents drawn from the AC mains by power supplies. For many applications in the 100 W to 10 KW range, the Unity Power Factor (UPF) boost preregulator .front end. is finding increasing use.
Unfortunately the power circuit voltages, currents and switching duty cycle are continuously changing throughout the AC line cycle, even for .fixed. input and output conditions, which significantly complicates the calculation of losses in the preregulator. Formulas, graphs and rules-of-thumb are presented which simplify the calculation of most circuit losses.
Unfortunately the power circuit voltages, currents and switching duty cycle are continuously changing throughout the AC line cycle, even for .fixed. input and output conditions, which significantly complicates the calculation of losses in the preregulator. Formulas, graphs and rules-of-thumb are presented which simplify the calculation of most circuit losses.
最小化电源模块从交流市电取用的谐波电流已经越来越重要。在从100W到10KW的应用范围内，功率因数（UPF）前端补偿器已得到越来越多的应用。
不幸的是即使是在固定输入和输出条件之下，电源电压、电流和开关电源的工况总是在不停变化之中，这显著地使补偿器损耗的计算复杂化了。有一些公式、图表和定理可以简化多数线路损耗的计算。