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。
Comfortable and convenient operation, assembly thermal overload protection device and multi-file electronic speed constant power switch ensure high motor efficiency and durability.
操作舒适方便，装配过载过热保护装置，多档电子调速恒功开关，保证马达的高效率和耐用性。
When the acceleration period has terminated, the switch means is controlled by a PWM pulse of the duty ratio in accordance with the speed instruction data, there by driving the DC motor.
在该加速期间结束时，以占空比与速度指令数据对应的PW M脉冲来控制开关机构，从而驱动该直流马达。
This variable speed switch reluctance motor drive can change the forming equipment to be simple in structure, reliable in working, and content in numerical control.
证明开关磁阻调速可使成形设备结构简单，运行可靠，满足数字化控制的需求。
Once the motor reaches near design operating speed, the centrifugal switch activates, opening the contacts and disconnecting the startup winding from the power source.
一旦电机达到接近设计运行转速，离心开关开始动作，关断启动绕组与电网之间的连接。
The paper introduced a microcomputer measuring system that takes measurement of the cen-triffugal switch breaking speed of single phase induction motor.
介绍了单相电动机离心开关断开转速的微机测试系统，该系统利用单板机控制，以电动机起动电流作为开关断开信号。
In order to obtain a kind of spinning prism with high spinning speed, continuous adjustability and robust stability, the driving system of a high-speed motor for spinning prism Q-switch was designed.
为了实现转镜的高转速、连续可调以及高度稳定性，对转镜Q开关的高速电机及其驱动控制系统进行了设计。
In order to obtain a kind of spinning prism with high spinning speed, continuous adjustability and robust stability, the driving system of a high-speed motor for spinning prism Q-switch was designed.
为了实现转镜的高转速、连续可调以及高度稳定性，对转镜Q开关的高速电机及其驱动控制系统进行了设计。
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