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Direct torque control (short for DTC), is a high-efficiency control technology in the variable frequency adjustable speed field of ac motor drives. 直接转矩控制(Direct Torque Control，简称DTC)是一种高效的交流调速技术，具有优良的调速性能和快速性，但是存在着转矩脉动比较大的问题；
Abstract: A design method of passband edge frequency adjustable active filter is presented.The filter is controlled by a microprocessor. 摘要: 给出了一种用单片机控制、通带边界频率可调、适用于较高频率的有源滤波器的设计方法。
Frequency Adjust Potentiometer A frequency adjust potentiometer is used to manually bring the frequency (speed) of the incoming set to that of the bus for synchronizing purposes. 频率调整电位器频率调整电位器是用于手动调整输入机组的频率使之与母排同步。
This paper introduces variable frequency adjustable speed system for external rotol synchronous motor with permanent field magnets fitted to a dacron filament high-speed spinning machine friction roll. 本文介绍用于涤纶长丝高速纺丝机摩擦辊外转子永磁式同步电动机的变频调速系统。
This paper mainly introduces the starting method,and the starting torque,starting current and starting time (i.e.acceleration time) of the variable frequency adjustable speed induction motors. 主要介绍变频调速异步电动机的起动方式及涉及的起动转矩、起动电流和起动时间(或称加速时间 )。
In order to make the microstrip equalizer matchs the given attenuation curve respectively ,it should be attenuation adjustable and quality factor adjustable besides frequency adjustable. 为了使微带均衡器满足衰减特性与给定的误差曲线逐点拟和的要求，就必须使其频率可调、衰减可调、品质因数可调。
speed and frequency adjustable system 变频调速系统
variable frequency adjustable speed 变频调速
Vary frequency adjustable speed of high voltage 高压变频调速
variable - frequency adjustable - speed 变频调速
In case of absence of a precision external reference, the OCXO frequency adjustment is carried out by means of the P1 potentiometer. 万一一个精密度的外部参数缺省，OCXO频率调整依靠P1电位计来实行。
The experimental results showthat the frequency adjustment range of the filter is in excess of 3 dec-ades. 实验结果表明;滤波器的频率调节范围已超过了三个数量级.
Frequency adjustment and re-routeing via Tseung Kwan O MTR Station to provide MTR feeder for Clear Water Bay. 调整班次及改道经将军澳地铁站，以提供接驳清水湾与地铁站的服务。
Frequency adjustment and terminal change to Hang Hau MTR Station Public Transport Interchange. 调整班次，总站迁往坑口地铁站公共交通交汇处。
He varied the transmission frequency. 他变换了无线电传送的频率。
A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
To adjust(a receiver) to a desired frequency. 调整（接收器的频率）调谐（接收器）以达到希望的频率
SLIDING MODE-VECTOR CONTROL VARIABLE FREQUENCY ADJUSTABLE SPEED SYSTEM 滑模-矢量控制变频调速系统
Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。