伏特量交流电路中电压与电流的有效值以及电流与电压之间相位角的余弦之乘积。
The product of the effective values of the voltage and current with the cosine of the phase Angle between current and voltage in an alternating-current circuit.
所设计的电网参数测试仪可以测量功率因数、电压和电流的有效值、瞬时值等参数。
The tester designed can be used to measure the parameters, such as power factor, effective value of voltage and current, instantaneous value, etc.
为了对比一个已知直流参考的未知交流信号热效应，计量人员可以确定在一段时间内直流的交流有效值(电压或电流)。
By comparing the heating effect of an unknown AC signal to that from a known DC reference, metrologists can determine the RMS AC quantity (voltage or current) in terms of the DC quantity.
为了满足实时检测要求，研究了计算电压、电流有效值和功率因数的快速演算法。
In order to satisfy the real - time measurement, we studied the fast arithmetic of virtual value of voltage and current, power factor.
在此基础上研究了电能质量监测理论，详细介绍了电压电流有效值、功率、三相不平衡度、谐波和闪变的数字测量方法。
Based on this requirement, this paper introduced the theory of power quality monitoring, include RMS of voltage and current, power, three-phase unbalance, harmonic and flicker.
在焊点形成的过程中，点焊电流有效值的检测与控制是保证焊接质量的关键。
During the course of forming the welding spot, checking and controlling spot welding current value is the key to assure the welding quality.
讨论了对含谐波的正弦电压(电流)采样值直接进行小波变换计算基波、谐波电压(电流)的有效值及频率的方法。
It's discussed that the method of RMS and frequency measurements directly from the wavelet transform data associated with each sampling sine voltage (current) element pair containing harmonic.
确定了以逐点积分法作为电流有效值的计算方法，建立了以80c196KC单片机为中心控制器件的软件、硬件系统。
The calculation of spot welding current is determined by the way of point-by-point integration, the software and hardware system is constituted based on 80c196kc single chip computer.
我们使用了真有效值转换集成芯片AD536研制成功PTCR残余电流测试仪，本文叙述了该仪器的原理。
We used a monlithic Integrated circuit AD536 which performs ture rms-to-dc conversion. This paper describes the principle of the PTCR remainder current instrument with AD536.
计算高压配电线路得出的三相电压、三相电流有效值误差小于0.5%。
The errorless of three-phase voltage and current is less than 0.5 percent.
本文在数字信号处理理论的基础上，通过对电压和电流信号特性的分析，研究了一种新的计算电压和电流有效值的体系结构。
On the basis of the digital signal processing theory and the characters of voltage and current, the system structure of a kind of new voltage (current) RMS calculator is proposed.
逆变器满负荷时的电感电流有效值和电流峰值是滤波电感设计的两个重要参数。
During full load running of inverter, the inductive current RMS value and the peak current are two important parameters for designing the inductor of the output LC filter.
试验结果表明，限流器可以有效限制短路电流的峰值和有效值，对于母线电压跌落也有较好的抑制效果。
Experimental results showed that the fault current limiter was effective in curbing the short-circuit current peak and RMS, and it also performed well on inhibiting the bus voltage drop.
该装置用真有效值电路检测非正弦焊接电流值，用中断和定时计数器实现了可控硅的精确触发。
The measuring circuit for RMS of non-Sin welding current and the precise triggers of SCR using interrupt controllers and timers in AduC812 MCU are also described.
该装置用真有效值电路检测非正弦焊接电流值，用中断和定时计数器实现了可控硅的精确触发。
The measuring circuit for RMS of non-Sin welding current and the precise triggers of SCR using interrupt controllers and timers in AduC812 MCU are also described.
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