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问题的引入对于目前使用的电器设备,不论其功率的大小如何,总是可以分类为电阻负载、感性负载、容性负载,尤其感性负载居多。考虑到带整流电路的电器设备使用面很广,量极大。所以其功率因数的提高,也不能勿视它的经济效益。我们仅仅从线路功率因数的角度,讨论如何提高的方法及其效益。在一般情况下,线路功率因数入可以写成:λ=P/S=i_1/icosφ=ξcosφ……(1)其中:P:基波电压,基波电流及其相位差之积。S:电压和电流有效值之积。ξ:电流波形畸变系数。当直流用电设备接入电网时,往往对交
The introduction of the problem for the current use of electrical equipment, regardless of the size of its power can always be classified as resistive load, inductive load, capacitive load, especially the majority of inductive load. Taking into account the rectifier circuit with a wide range of electrical equipment, a great amount. Therefore, the increase of its power factor, it can not ignore its economic benefits. We only discuss how to improve the method and its benefits from the perspective of line power factor. Under normal circumstances, the line power factor can be written as: λ = P / S = i_1 / icosφ = ξcosφ (1) Where: P: fundamental voltage, fundamental current and phase difference of the product. S: Voltage and current rms product. ξ: current waveform distortion factor. When the DC electrical equipment access to the grid, often on the pay