双变频器控制，袋长即设即切，无需调节空走，一步到位，省时省膜。
Double transducer control, flexible bag length cutting, operator needn't to adjust the unloading working, time and film savable.
本文以三层电梯为设计对象，结合三垦vm06系列恒转矩高性能变频器，开发出一套交流双速的PLC电梯控制系统。
In this paper, three elevators for the design of objects, combined with Sanken VM06 series of high-performance constant torque converter, developed a two-speed exchange of PLC elevator control system.
在分析了其他变频器的局限性后，指出了双PW M变频器是交流励磁的最佳电源方案，详细地讨论了电压型双pw M变频器的工作原理与控制策略。
In this paper, a back-to-back PWM converter is considered as the optimum scheme of ac excitation power supply and its operation principle and control strategy are discussed in detail.
双馈电机能够四象限运行，且可在转子侧变频控制，降低了变频器容量。
Meanwhile, By the rotor side control of doubly-fed motor, the capability of converter can be decreased largely.
在建立异步电动机和变频器数学模型的基础上，按照工程设计法设计出PI调节器，并进行了双闭环控制实验。
On the base of ma thematic model of induction motor and inverter, engineering designing method is used to design the PI regulator, and experiments on the double-closed-loops system is carried out.
讨论了正弦波输出的交—交变频器触发角的控制方案，实现了双微机控制的交—交变频器的低频控制，给出了实际运行波形。
The triggering Angle modulation method of the sine-wave cyclo-converter is carried out, and the operating wave form of the designed system is put forward.
讨论了正弦波输出的交—交变频器触发角的控制方案，实现了双微机控制的交—交变频器的低频控制，给出了实际运行波形。
The triggering Angle modulation method of the sine-wave cyclo-converter is carried out, and the operating wave form of the designed system is put forward.
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