The main spindle is driven by a variable frequency controlled AC motor.
主轴是由变频控制交流电机驱动。
Utilizing the information observed, a new type of slip frequency controlled torque-speed double closed loop system is developed.
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。
Frequency controlled data (m) plus an accumulative phase data output by a phase register in an N-bit adder when a clock pulse comes, the result is sent to the input port of the phase register.
每来一个时钟脉冲，N位加法器将频率控制数据m与相位寄存器输出的累加相位数据相加，并将结果送相位寄存器输入端。
Presents the energy saving principle of a frequency-controlled pump and points out the applicability of the law of similitude for centrifugal pumps and the conception of constant efficiency curves.
阐述了循环水泵变频调速的节能原理，提出离心 水泵相似定律的适用性和等效率曲线概念。
Presents the energy saving principle of a frequency-controlled pump and points out the applicability of the law of similitude for centrifugal pumps and the conception of constant efficiency curves.
阐述了循环水泵变频调速的节能原理，提出离心 水泵相似定律的适用性和等效率曲线概念。
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