3 马力的电机与一个标称值恒定负载（11.9牛顿·米）相连接。在1.0pu，开始并在t= 0.9秒到达设定点速度。
The parameters of the machine are those found in the preceding SI Units dialog box above, except for the stator leakage inductance, which is set to twice its normal value to simulate a smoothing inductor placed between the inverter and the machine. Also, the stationary reference frame was used to obtain the results shown.
机器的参数是那些出现在前面的SI单位对话框中，除了定子漏感，其被设定到其正常值的两倍以模拟在逆变器和机器之间一个平滑电感器。此外，固定的参考系用来展示获得的结果。
Open the power_pwm demo. In the simulation parameters, a small relative tolerance is required because of the high switching rate of the inverter.
Run the simulation and observe the machine's speed and torque.
打开power_pwm演示。在仿真参数里，因为逆变器高的开关速率，一个小的相对公差是必需的。
运行仿真并观察电机的速度和转矩。
The first graph shows the machine's speed going from 0 to 1725 rpm (1.0 pu). The second graph shows the electromagnetic torque developed by the machine. Because the stator is fed by a PWM inverter, a noisy torque is observed.
However, this noise is not visible in the speed because it is filtered out by the machine's inertia, but it can be seen in the stator and rotor currents.
第一张图显示了电机的速度从0到1725转（1.0 PU）。第二图表显示电机的电磁转矩。由于定子被供给通过PWM逆变器，一个杂波的转矩能被观察到。
然而，这种噪声在速度上是不可见的，因为它被机器的惯性过滤掉，但它在定子和转子电流图上可以被看出。
Look at the output of the PWM inverter. Because nothing of interest can be seen at the simulation time scale, the graph concentrates on the last moments of the simulation
查看PWM逆变器的输出。由于在模拟的时间尺度上没有规律可以看出，图表集中在仿真最后时刻。
Example 2: Effect of Saturation of the Asynchronous Machine Block
例2：饱和异步电机模块的影响
The power_asm_sat demo illustrates the effect of saturation of the Asynchronous Machine block. Two identical three-phase motors (50 HP, 460 V, 1800 rpm) are simulated, with and without saturation, to observe the saturation effects on the stator currents. Two different simulations are realized in the demo.
power_asm_sat演示出饱和的异步电机模块的影响。
两个相同的三相交流电动机（50马力，转速为1800 rpm，460 V）进行仿真，有或没有饱和，观察饱和对定子电流的影响。两种不同的仿真在演示中实现。
The first simulation is the no-load steady-state test. This table contains the values of the Saturation Parameters and the measurements obtained by simulating different operating points on the saturated motor (no-load and in steady-state).
第一个仿真是无负载的稳态测试。此表包含饱和参数和通过仿真不同饱和电机（无负载，在稳定状态下）工作点的测量值。
The next graph illustrates these results and shows the accuracy of the saturation model. The measured operating points fit well the curve that is plotted from the Saturation Parameters data. 下图显示出这些结果并能表示饱和模型的精准度。测量工作点是很好的对于曲线，它是用饱和参数数据绘制的。
You can observe the other effects of saturation on the stator currents by running the simulation with a blocked rotor or with many different values of load torque. 你可以在定子电流上观察到另外的饱和效应，通过运行仿真转子堵转或有许多不同的负载转矩值等。 References
[1] Krause, P.C., O. Wasynczuk, and S.D. Sudhoff, Analysis of Electric Machinery, IEEE Press, 2002. [2] Mohan, N., T.M. Undeland, and W.P. Robbins, Power Electronics: Converters, Applications, and Design, John Wiley & Sons, Inc., New York, 1995, Section8.4.1. 参考文献
[1]克劳斯，P.C.，O. Wasynczuk，和标准偏差Sudhoff，分析电机，IEEE出版社，2002年。 [2]莫汉，N.，T.M.昂德兰，W.P.罗宾斯，电力电子转换器，应用，设计，John Wiley＆Sons公司，纽约，1995年，Section8.4.1。 See Also Powergui 参见
PowerGUI