整机为双变频控制的基础上添加了齿轮传动系统，使整机操作简单、高速运行更加稳定。
Gear system besides Double frequency converter controller, making machine simpler operation and more stable when high-speed working.
对双PWM变频调速系统中的三相PWM整流器及其控制方法进行了研究。
This paper studied the three-phase PWM(pulse width modulation) rectifier in dual PWM variable frequency speed regulation system.
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.
介绍一种双闭环控制变频调速系统。
双电机变频控制。降低滑差率。
基于观测出的状态信息，构成了转差频率控制的转矩速度双闭环新型变频调速系统。
Utilizing the information observed, a new type of slip frequency controlled torque-speed double closed loop system is developed.
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.
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.
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.
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.
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