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pulse width type AFC circuit 脉宽式自动频率控制电路
Because of built-in PWM circuit(pulse width modulation circuit),dimming range is wider than earlier type products. 因使用PWM（脉冲宽度调制）电路，产品具有较宽的调光范围。
The principle of pulse width modulation (PWM) is analyzed. A PWM circuit model is set and its characteristics are simulated by PSCAD/EMTDC. 对脉宽调制(PWM)的原理进行了分析，用PSCAD/EMTDC搭建了PWM电路模型，并对其特性进行了仿真分析。
JI Qing-bo, FENG Chi.Design of monostable pulse width circuit with CPLD[J].Applied Science and Technology,2001, (12) :6-8. [1]汲清波;冯驰.;基于ALTERA CPLD的单稳态脉冲展宽电路[J]
Pulse width modulator and sample maintenance installment. 脉冲宽度调制器和取样保持装置。
The objective of PLD design in pulse width control and pulse delay is proved to be reached by the simulation of the circuit. 通过对该电路的仿真分析表明，PLD设计达了脉宽控制和延时的预期目标。
The operating principle of a bridge type Pulse Width Modulation(PWM) power source,driving of switch element IGBT,overvoltage and overcurrent are briefly described in the paper. 概述了桥式脉冲宽度调制（PWM）功率源的工作原理，以及开关元件IGBT的驱动、过压、过流保护等问题。
Without contacting point chopper AC regulator adopts enforced pulse width modulation(EPWM)control strategy,it is mainly consisted of main circuit and control circuit. 无触点斩波式交流稳压器采用增强型脉宽调制EPWM控制策略,它主要由主电路和控制电路组成。
This article mainly analyzes the working principle of two kinds of non-balanced AFC circuit. 摘要本文主要分析两种非平衡型AFC电路的工作原理。
Pulse Width Decoder-A Flxxible Application of Integrated Analog Switch CMOS. CMOS集成模拟开关的变通应用-脉宽解码器。
The TXL readout pulse may have the same pulse width as the TXS readout pulse. 转移电晶体TXL可具有与转移电晶体TXS相同的读出脉波宽度。
Pulse width modulation (PWM) is an analog signal level for digital encoding. 脉冲宽度调制（PWM）是一种对模拟信号电平进行数字编码的方法。
This paper presents the development of DC110V control power which is su itable to different type of locomotive by power factor correction ,pulse width modulating and driving module. 介绍了适合各型机车使用的DC110V控制电源,该电源采用功率因数校正、脉宽调制和驱动模块,具有效率高,电磁兼容性好的特点。
ABSTRACT ： Comparing with traditional HVDC system the merits of a new type of HVDC system based on voltage source converters (VSC) and pulse width modulation (PWM) technologies is expounded. 摘要：文章阐述了基于电压源换流器（VSC）和脉冲宽度调制（PWM）技术的直流输电与传统的直流输电相比具有的诸多优点。
The principle of PFC and the methed of controling PFC by means of pulse width ndm IC 3524and gives the actual circuit of the inversion are welding power source with PFC function are also analysed. 介绍了逆变式直流弧焊电源的基本原理，以及在逆变式直流弧焊电源中采用功率因数校正（PFC）的必要性，分析了PFC的原理和利用通用的脉宽调制集成电路3524实现PFC控制的方法，给出了具有PFC功能的逆变式直流弧焊电源的实际电路。
Position control of d. c. motors has been done by means of pulse width modulation. 直流电机位置用脉冲宽度调制法控制。
The control mode has developed from early U\f control mode to vector control technology and pulse width modulation. 控制方式也从早期的电压;频率控制方式发展到向量控制技术和冲宽度调制技术。
High-speed on-off valves are used and controlled with pulse width modulation (PWM) in this system. 系统应用高速开关阀，用脉宽调制(PWM)的方法进行控制。
The inverse control method for pulse width modulation (PWM) inverter-fed induction motors is discussed. 摘要针对电压源型逆变器供电的感应电动机，应用逆系统理论提出了一种新型控制策略。
And a trapezoidal pulse voltage source with the pulse width nearly equal to the line delay. 因负载端去耦合电容含线头电感所产生之效应。