DC current or voltage source. Magnitude of AC component can be specified.
直流电流源或电压源。可指定交流分量的大小。
The new control way can realize linear control for DC-bus voltage and get the fundamental component of the load current synchronously with a little of calculation.
该方法以电网电压为同步信号，在电网电压信号的过零点采样直流侧电容电压，并通过周期离散控制可以获得负荷电流有功分量。
The harmonic source can be classified into current harmonic source and voltage harmonic source on the basis of a transformer with a filter component on its DC side.
根据变流器直流侧滤波元件，将谐波源分成电流型和电压型谐波源。
In this paper, a comprehensive method combined by DC component method, AC superposition method and loss current measurement method are described at first.
首先介绍了由“直流分量法”、“交流叠加法”和“损耗电流测量法”三者结合起来的综合判断方法，然后重点论述了交流叠加法的具体实现方案。
The approach utilizes 2-level derivation of secondary current and a 3-sample fitting calculation for decaying DC component depress as well as the sample data identifying.
该方法采用微分电路和三采样值运算法，以电流的二阶导数深度抑制非周期分量并提高对采样值的甄别。
Since the DC current on each side is the same, the effective DC in the transformer core is cancelled, so there is no need to provide for a large DC component.
因为两臂的直流电路相等而方向相反，所以在变压器铁心中有效直流磁通是互相抵消的，所以不再需要巨大的直流元件。
Because of the limitation of theory, Fourier algorithm is unable to filtering the periodic component, and especially poor in restraining decaying DC component which is common in current malfunction.
由于傅氏算法原理上的局限，它不能完全滤除非周期分量，尤其对电流故障中常见的衰减直流分量的抑制能力很差。
The present invention has no intermediate DC link and thus simplified circuit, low cost, less harmonic component in the voltage anc current waveform and high power factor.
本发明所设计的波形变换方法及其装置，省去了中间直流环节，使线路得以大大简化，显著降低了成本，同时使电压、电流谐波得以减小，并可获得较高的功率因数。
The present invention has no intermediate DC link and thus simplified circuit, low cost, less harmonic component in the voltage anc current waveform and high power factor.
本发明所设计的波形变换方法及其装置，省去了中间直流环节，使线路得以大大简化，显著降低了成本，同时使电压、电流谐波得以减小，并可获得较高的功率因数。
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