JFEM电机引接线绕组线引出线_JFEM电机引接线

江苏春晨电缆有限公司生产JFEM电机引接线绕组线引出线，

一、执行标准: JB6213-92
二、适用范围：
适用于交流额定电压6000V及以下的电机绕组引出连接用。
三、使用特性：
电线导体的长期允许工作温度应不超过90℃。

前面两节课中所讲到的如上图所示的波形图是一种特定波形：即t=0时，e=0。
The waveform shown in the previous two lessons is a particular type of waveform, that is, t=0, e=0.
正弦交流电同频率电压电流波形图
Sinusoidal alternating current and frequency voltage and current waveform diagram
而实际中，t=0时，e不一定为零，如右图所示：因此，一般正弦交流量的瞬时表达式应为：
In practice, when t=0, e is not necessarily zero, as shown on the right, therefore, the instantaneous expression of the general sinusoidal flow should be as follows:
e=Emsin（ωt+Φe）
E=Emsin (omega t+ E)
u=Umsin（ωt+Φu）
U=Umsin (omega t+ U)
i=Imsin（ωt+Φi）
I=Imsin (omega t+ I)
相位、初相和相位差
Phase, initial phase and phase difference

上述公式中（ωt+Φ）称为正弦量的相位，它是表示正弦量变化进程的物理量。例如：当相位ωt+Φ=90°，e=Em，当（ωt+Φ）=180°时，e=0，如此等等。可见，相位随时间不断变化，电动势e也就不断变化。由于相位是用电角度表示的，所以也称相位角。
The above formula (omega t+) is called the phase of the sine quantity, and it is the physical quantity that represents the process of the sinusoidal variation. For example, when the phase Omega t+ =90 degrees, e=Em, when (omega t+) =180 degrees, e=0, and so on. It can be seen that the phase changes with time, and the electromotive force (EMF) e is constantly changing. As the phase is expressed in an electric angle, it is also known as the phase angle.
公式中Φ称为正弦量的初相角。它是t=0时的相位角，简称初相。
In the formula, it is called the initial angle of the sine quantity. It is the phase angle of t=0, abbreviated as the initial phase.JFEM电机引接线绕组线引出线

在交流电路中经常要进行同频率正弦量之间相位的比较（比如电压和电流之间）。同频率正弦量的相位之差称为相位差，用△Φ表示。在上右图中，电压u与电流i的相位差为：
A comparison of the phase between the same frequency sinusoids (such as between voltage and current) is often required in an AC circuit. The phase difference of same frequency sinusoidal function called phase difference, represented by the delta phi. In the image on the right, the phase difference between the voltage U and the current I is:
△Φ=（ωt+Φu）-（ωt+Φi）=Φu-Φi
Delta phi (omega phi = t+ U (t+) - Omega Phi Phi Phi = I) u- I
即为两正弦量初相之差。虽然相位是时间的函数，但相位差则是不随时间而变化的常数。
That is, the difference between the initial phase of the two sinusoidal quantity. Although the phase is a function of time, the phase difference is a constant that does not change with time.
如果两同频率正弦量的初相相等，相位差为零，我们称它们同相，即它们同时达到正或负的最大值，同事到达零值；如果它们的相位差等于±π（180°），则称它们是反相，即它们在任意瞬时方向总是相反的；如果它们的相位不同，相位差不等于零，则称在本格周期内谁先达到最大值的正弦量比后到达同方向最大值的正弦量是超前的，或称后者滞后于前者，也就是初相大的超前初相小的。在上右图中u超前于i，即u比i先到达最大值。JFEM电机引接线绕组线引出线

If the two same frequency sinusoidal quantity equal to the initial phase, phase difference is zero, we call them in, they also reached the maximum positive or negative, if their colleagues got zero; the phase difference is equal to + PI (180 degrees), they are called RP, that they always have the opposite direction at any instant; if their phase difference, phase difference is not equal to zero, said in 2 period who first reached the maximum value of the sinusoidal quantity than the sine value with the arrival direction is ahead, or the latter lags behind the former, which is the initial phase of the initial phase of the small advance. In the picture on the right, u is ahead of the I, that is, the U reaches the maximum first than the I.

JFEM电机引接线绕组线引出线

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