In order to damp the disturbances aroused by control switch and eliminate the system stead-state error, ratio switch and intelligent integrated switch are introduced int.
为防止由控制量切换引起的系统扰动，引入比值切换方式；为消除系统余差，引入智能积分开关。
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。
Through analyzing the power flow in a switch network, a calculation method and formula and its program block diagram of conductance ratio of every switch are put forward in this paper.
通过对开关网络的潮流分析，得出实际运行条件下计算开关网络中各开关电导比的公式和求解方法，并给出了程序框图。
A structure of the switch is given, which has an ideal extinction ratio and is characterized by its easy alignment and no strict confinement of the length along Z-axis.
介绍了这类开关的一种结构，它有理想的消光比，并具有校准方便，对沿Z轴长度无严格限制等特点。
Based upon high performance-price ratio products, excellent service system and well established credibility, we provide products and services to hundreds of domestic switch gear companies.
凭借产品卓越的性能、合理的价格、完善的服务体系及良好的的品牌可信度，为国内数百家开关电气成套企业提供产品及相关服务。
The at least one switch is operated at a second switching frequency if the calculated pulse ratio is less than a first pulse ratio value and greater than a second pulse ratio value.
如果所计算的脉冲比小于第一脉冲比值且大于第二脉冲比值，该至少一个开关以第二开关频率操作。
From the view of switch utilization ratio, the theory gist is given for employing which circuit in condition with different total harmonic distortion of load current to correct harmonic current.
从开关利用率的角度，为不同负载电流畸变率情况下选取何种电路进行谐波补偿，提供了理论依据。
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。
Load tap switch is the central contrivance in load-ratio voltage regulation of transformer.
有载分接开关是变压器有载调压的主要装置。
The duality of transformers (ideal and perfect models) is investigated. In addition, the duality relationships of duty ratio parameters and semiconductor-switch topologies are also given.
文中导出了动态导通比参数、半导体开关管拓扑以及变压器理想模型的对偶形式。
The text color will automatically switch (between black and white) according to the calculated contrast ratio.
文本颜色将根据计算的对比度自动切换（黑色和白色之间）。
The text color will automatically switch (between black and white) according to the calculated contrast ratio.
文本颜色将根据计算的对比度自动切换（黑色和白色之间）。
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