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• The harmonic characteristic of input current in single-phase voltage source PWM converter is analyzed theoretically.

从理论上分析了单相电压pwm变流器输入电流谐波特性

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• As the heart of the power factor correction circuit, the gain modulator gets a high power factor by controlling the input current.

增益调制器作为功率因数校正电路核心电路通过控制输入电流来得到一个功率因数

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• To reduce the inductor and the phase displacement between the input current and the input voltage simultaneously, Multi-level (ML) converters are adopted as the PFC topologies in this thesis.

为了同时减小电感输入电流输入电压相位差本文提出采用多电平变换器作为PFC变换器拓扑

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• The result is quiet perfect, the input current follows the input voltage very well.

控制效果输入电流波形跟踪输入电压波形；

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• It is found that the input current produces distortion even if the three-phase input voltages are balanced.

发现即使三相输入电压平衡输入电流也存在失真现象。

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• Input current is smooth.

输入电流平滑

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• This paper describes a new method used for controlling convert power supply, which can make the input current to be sinus waveform, and the power factor to be 1.

提出一种新的整流电源控制策略，可以使整流电源工作时，从电网输入电流近似正弦波功率因素接近1

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• Torque increases directly with input current for linearity.

转矩增加直接输入电流线性度

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• Themeasured input current THD is 4.26%. Power Factor attains 0.998. Theprototype realizes the expectation.

样机在实验中测得输入电流谐波畸变率（THD）为4.26%，功率因数为0.998，达到预期的设计效果。

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• Introduced an evaluation and expression of uncertainty about the input current test. In this test, we use a in-series resistance to measure the steady –state input current.

安全稳态输入电流实验方法进行了介绍，探讨使用串联标准电阻测量电流不确定度评定根据计算结果对实验过程进行分析。

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• In both cases, the harmonic content of the input current have been evaluated analytically.

两种情况输入电流谐波成分进行了动态分析。

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• However, because of its nonlinear characteristics, the switching power supply resulting input current contains a large number of odd harmonics, which cause serious harmonic pollution for the grid.

然而由于非线性特性导致其输入电流中含有大量谐波，对电网造成严重谐波污染

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• It reduces the high hypo syntony wave output part included in the converted input current.

减少了变频器输入电流包含谐波成份输出

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• The major shortcomings of CMOS Digital Integrated Circuit concentrate on two primary parameters: input current and supply current.

CMOS数字集成电路各种缺陷集中地反映输入电流电源电流两个参数

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• By using the time variant modulation ratio method, the harmonics can be eliminated and a sinusoidal and balanced output voltage or input current is obtained.

通过采用时变调制方法可以消除不对称输入电压的影响，从而获得对称正弦输出电压输入电流

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• The paper gives two kinds of approaches to measure the ripple current in input current of DC-DC converter or DC-AC inverter.

文中叙述了直流直流变换器直流—交流逆变器输入电流纹波电流测量方法

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• Simulation results demonstrate: the chaotic modulation signals generated from the four kinds of chaotic sources can all reduce the peak level of the input current and the output voltage spectrums.

仿真结果表明混沌调制生成混沌开关调制信号，均能够降低电源输入电流输出电压频谱峰值

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• Simulation and experimental results show that the proposed converter has sine wave input current and output voltage, low harmonic content, adjustable power factor, and zero voltage commutation.

仿真实验结果表明提出变换器输入电流输出电压正弦谐波小且输入功率因数可控实现零电压换流

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• When electric power coupling transformer at input current is less than rated value, public winding can be also overload.

电力自耦变压器输入电流小于额定值，其公共绕组可能过负荷

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• In hydraulic synchronizing lifting technology for oversize structure, computer output PWM signal as the input current of proportional valve is used to control the velocity of hydraulic cylinder.

大型构件液压同步提升技术中，采用了计算机输出脉宽调制信号作为比例流量输入电流信号控制液压提升器的速度

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• Whem electric power coupling transformer at input current is less than rated value, public winding can be also overloaded.

电力变压器输入电流小于额定值时，其公共绕组可能过负荷

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• The input current should be less than1.5A, under minimum AC input and full load.

输入电压最小值，负载满载条件，最大输入电流不大于1.5 A。

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• Thus, the output voltage is a measure of input current, and overall sensitivity is determined by the feedback resistor RF).

所以输出电压可以用来度量输入电流总的灵敏度反馈电阻器RF决定

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• Electric saver can improve the power factor, reducing input current, lighting the transformer's load, and increasing efficiency and transformer's volume.

提高功率因数降低输入电流减轻变压器负荷提高效率增大变压器容量

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• Experiment result showed, the topology can make the device get to high Power Factor (PF), low Total Harmonic Distortion (THD) of input current, low ripple of output voltage, and high efficiency.

实验结果表明，应用电路拓扑实验装置，其功率因数较高输入电流谐波畸变较低输出电压波小，而且整个装置效率也比较

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• The influence factors of input current distortion rate, such as:the values of inductor, hySteresis-hod .

讨论不同电感不同滞环大小及不同死区输入电流畸变影响

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• However if the active clamp flyback converter is designed to operate in CCM, and the duty cycle is controlled to make the input current track input voltage, the input power factor can be improved.

如果设计有源箝位电路工作电流连续模式，控制使输入电流跟随输入电压可以提高输入功率因数

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• However if the active clamp flyback converter is designed to operate in CCM, and the duty cycle is controlled to make the input current track input voltage, the input power factor can be improved.

如果设计有源箝位电路工作电流连续模式，控制使输入电流跟随输入电压可以提高输入功率因数

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