单位功率因数 meaning in English
unity power factor
unity power-factor
unity-power factor
Examples
- The result of simulation for the closed - loop system in the matlab illustrates that the system can provide unity power factor not only in ideal condition but also in the case of errors in missing of some current
研究表明系统在理想情况下能实现单位功率因数而且在某相电流误差信号丢失的非理想情况下仍然能实现单位功率因数控制。 - The conventional rectifiers produce harmonic problem in power system . while three - phase pwm voltage source rectifiers ( vsr ) can provide constant dc bus voltage and get low harmonic distortion of input current . it also has line power feedback capability
传统的整流装置是电网污染的主要来源，三相电压型pwm整流器具有输出电压恒定、能实现单位功率因数运行的特点，甚至可以实现电能回馈电网。 - The integrate - reset - control three - phase six - switch boost power - factor - correction is proposed . according to the equivalent circuit in the a - b - c coordination , the control equations are deduced in detail . some simulations and experiments are done to validate the analysis
根据三相六开关boost型功率因数校正在a - b - c坐标系下的数学模型，采用平均法，得到实现单位功率因数所需的控制方程并用积分复位控制电路加以实现。 - With the serious problem of harmonics pollution to the power system , as well as the need of high performance of ac drive application , three - phase pwm rectifiers have been as active research topic in power electronics recently , due to the virtues , such as sinusoidal input currents , unity power factor , steady output voltage , good dynamics and bin - directional energy flow
随着电网谐波污染问题日益严重和人们对高性能电力传动技术的需要， pwm整流技术引起人们越来越多的注意。三相pwm整流器可以做到输入电流正弦、单位功率因数、直流电压输出稳定，具有良好的动态性能并可实现能量的双向流动。因此， pwm整流器成为当前电力电子领域研究的热点课题之一。 - These studies in the thesis have been done as follows : it is proved that if the three - phase single - switch boost type power - factor - correction can work in continuous - current - mode , its power factor can not reach unity . therefore , it is not qualified for high power and high requirement application . according to the ac side equivalent circuit of the three - phase three - switch boost type power - factor - correction , the equations to realize unity power factor have been deduced and realized by integrate - reset - control circuit
本论文把积分复位控制成功应用于三相功率因数校正技术中，作了以下几方面的研究： 1 .从理论上证明了三相单开关boost型pfc即使工作在ccm ，其功率因数也不能达到1 ，在大功率和对功率因数校正能力要求较高的场合，三相单开关boost型pfc达不到要求， 2 .根据三相三开关boost型功率因数校正交流侧的等效电路，推导出实现单位功率因数所需的控制方程，并用积分复位控制电路进行实现，在理论研究的基础上进行了仿真研究。