We can realize the automation of the phase modulation by programming the controller of stepper motor.
通过对步进电机控制器编程实现了相位调制的自动化。
Using space vector pulse-width modulation (SVPWM) signal transformation method, speed regulation of induction motor is implemented by controlling the duty ratio of every converter switch.
利用电压空间矢量脉宽调制(SVPWM)信号变换控制功率变换器各开关器件的导通占空比，实现异步电动机的速度调节。
The working principle and performance characteristic of asynchronous motor cascade velocity modulation are analyzed, and the inner feedback cascade velocity modulation is introduced systematically.
分析了异步电动机串级调速的工作原理与性能特点，介绍了内反馈串级调速电机及其装置的系统结构。
The torque ripple caused by diode freewheeling of the inactive phase during non-commutation state of PM brushless DC motor(BLDCM)when using the PWM_ON type of pulse width modulation was analyzed.
分析了传统的PWM_ON调制方式对无刷直流电动机在非换相期间由于截止相的反并联二极管续流而导致转矩脉动的原因。
According to the different PWM module in regeneration of brushless PM motor, there are two kinds of modulation, half bridge modulation and whole bridge modulation.
根据永磁无刷电动机制动过程PWM控制的开关管的方式不同，可以分为半桥调制制动方式和全桥调制制动方式。
After space vector PWM modulation algorithms and implementation methods have been analyzed, dual closed-loop vector control system of asynchronous motor is worked out.
分析了空间矢量pwm的调制算法以及实现方法，最后设计了异步电机的双闭环矢量控制系统。
A food waste disposer has a motor driven with pulse width modulation (' PWM ').
一种食物垃圾处理器，具有利用脉冲宽度调制(“PWM”)驱动的电机。
However, Pulse Width Modulation (PWM) which was input from inverter is characterized by steep rising edge and high frequency, resulting in the too early failure of motor insulation.
然而，逆变器输出的PWM(脉冲宽度调制)连续高压脉冲的上升沿很陡、频率很高，导致在脉冲电压下牵引电机绝缘过早失效。
The automatic production system is computerized by the central computer and frequency modulation and motor speed change are made by front-end control CARDS.
基于计算机控制的楞纸板自动生产系统，以主控计算机为自动控制核心，通过前端控制卡，实现了对变频器进行调节，和对电动机调速。
The Sine wave Pulse Width Modulation (SPWM) is used to reduce the wastage and the noise of the motor more effectively, as comparing to the equal pulse width modulated PWM.
相对于等宽脉宽调制PWM，正弦波脉宽调制SPWM可以有效地降低电动机的损耗和噪声。
A new current detection method is introduced aimed at lower bridge arm modulation when motor is operating at six states.
针对三相六拍两两导通且下桥臂开关管调制方式提出了新型电流检测方案。
Motor OPERATED valve, a valve using an electric motor for opening, closing and modulation.
马达操作活门，用电马达来开，关和调制的活门。
The theory of AC frequency modulation for motor speed regulation technology, its applied procedure and actual effect in dedusting fan of converter are stated.
介绍了交流变频调速技术的原理、在转炉除尘风机上的实施过程和使用效果。
The constant speed motor supplies the majority of driving power and the servo motor acts as a motion modulation device.
常速电机提供主要动力，伺服电机起运动调节作用。
Astoria USES frequency modulation motor, belt drive, to achieve a continuously variable.
道夫采用调频电机，齿形带传动，实现了无级变速。
Based on the mathematic model of separately excited DC motor, the control structure of the single - feedback-closed-loop controlled DC velocity modulation system was obtained.
在他励直流电机的数学模型的基础上，得到了单反馈闭环控制的直流调速系统的结构。
To reduce the low speed torque ripple of induction motor based on direct torque control (DTC), a new control strategy-improved discrete space vector modulation is proposed.
针对传统的异步电机直接转矩控制在低速时存在转矩脉动较大的问题，提出了一种减小转矩脉动的直接转矩控制方法。
A pulse width modulation (PWM) DC motor rotation speed control experiment system device is developed.
研制了直流电动机脉宽调制转速控制实验系统。
The suggested system makes use of a single phase HFAC pulse density modulation(PDM) converter as the interface to connect energy storage unit and power source for induction motor drive system.
系统采用间接矢量控制技术，通过高频交流脉冲密度调制接口变换器，对功率进行协调控制。
Main motor frequency modulation control.
主电动机调频控制。
The braking mode control of reviving power-consumption of large momentum fly-wheel motor is discussed on the basis of pulse-modulated amplitude-modulation in this paper.
讨论具有大惯量飞轮负载的直流无刷、定于无铁芯电机，在脉宽调制调幅有源控制的基础上，完成再生能耗制动控制以及低速下转换到有源制动控制的主要技术问题。
According to torque ripple of brushless DC motor, the different PWM modulation mode and overlapping commutation method are used to minimize torque pulsation when current commutation is considered.
针对无刷直流电动机的转矩脉动，提出采用不同的PWM调制方式以及不同的重叠换相角减小换相电流所引起的转矩脉动。
According to torque ripple of brushless DC motor, the different PWM modulation mode and overlapping commutation method are used to minimize torque pulsation when current commutation is considered.
针对无刷直流电动机的转矩脉动，提出采用不同的PWM调制方式以及不同的重叠换相角减小换相电流所引起的转矩脉动。
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