仿真结果表明，电机转速比是影响交交变频轧机系统网侧基波功率因数与电流总畸变率的关键原因。
The simulation results show that the speed ratio of the motor mostly affects the total harmonic distortion of the current and the displacement power factor.
装置可以计算波形任意部分的多达50次的暂态谐波，给出谐波总畸变率及各次谐波的含有率和谐波值。
The device can calculate transient harmonics (up to 50 orders) of any part of data wave, give the total harmonic distortion, each harmonic ratio and each harmonic value.
给出了输入功率因数、畸变因子、峰值系数、总谐波畸变率和谐波分量的实验结果。
The experiment results show input power factor, distortion factor, crest factor, total harmonic distortion and harmonic components.
该方案能在80 ~ 265V宽输入电压范围内得到稳定直流电压输出，具有效率高、总谐波畸变率低、功率因数接近为1等特点。
It can achieve a fixed output of DC voltage in the universal input range of ac 80 ~ 265 V. It owns the advantages of high efficiency, low total harmonic distortion, PF near to 1.
在这种新的逆变器开关控制策略中建立多目标优化函数，既使得电压型逆变电路输出电流波形总谐波畸变率尽量小，同时又能减小逆变过程的电力电子开关损耗。
In this control law multi-object function is created, which enables a voltage-source type inverter to produce a near standard sine wave with a minimum switching loss.
该样机在实验中测得输入电流总谐波畸变率（THD）为4.26%，功率因数为0.998，达到了预期的设计效果。
Themeasured input current THD is 4.26%. Power Factor attains 0.998. Theprototype realizes the expectation.
该样机在实验中测得输入电流总谐波畸变率（THD）为4.26%，功率因数为0.998，达到了预期的设计效果。
Themeasured input current THD is 4.26%. Power Factor attains 0.998. Theprototype realizes the expectation.
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