脉宽调制信号由PWM专用芯片UC3875组成的脉宽调制电路产生。
The signal of PWM is produced by the circuit which is composed of the chips UC3875.
送丝调速系统由功率MOSFET开关控制电路、脉宽调制电路及控制电路构成。
The wire feeder timing system consists of MOSFET switch control circuit, PWM circuit and control circuit.
研究中讨论了脉宽调制电路、驱动电路、恒值采样反馈电路、保护电路、参数预置与显示电路的组成及工作原理。
The pulse width modulate circuit, drive circuit, sample circuit, protecting circuit and parameters preset and display circuit are respectively analyzed.
同时，采用专用芯片SG3525来产生脉宽调制电路，由IR2110组成的驱动电路来驱动绝缘门极双极晶体管（IGBT）。
Special chips, such as SG3525 and IR2110 are also used to generate PWM and to drive the IGBT.
单片开关电源是开关电源专用集成电路，他将脉宽调制电路与高压MOSFET开关管及驱动电路等集成在一起，具备完善的保护功能。
Single-chip switching power supply are produced especially for switching power supply, which integrate PWM and high voltage MOSFET together , and have perfect protection function.
脉宽调制器是一种能够产生周期固定而占空比(脉宽)可调的方波信号的电路。
Pulse width Modulation device is a circuit which can produce square wave signal with fixed period and adjustable pulse duration ratio (pulse width).
本文介绍了以电流控制型脉宽调制芯片uc 3842构成的开关电源的原理，分析了其保护电路的缺陷，并提出了一种改进的思路。
The paper introduces the principle of switch power which is composed by current control type PMW UC3842 and analyzes the shortage of protective circuit and proposes an improving idea.
另外，还介绍了该计数器在一种平板显示器驱动电路中是如何通过脉宽调制实现灰度显示的。
In addition, how to use this counter to realize Gray Display by PWM in Driving Circuit of Flat Panel Display has been discussed.
采用高频倍压电路，应用PW M脉宽调制技术和大功率IGBT器件。
Adopt high frequency multi voltage circuit, PWM pulse width modulation technology and high-power IGBT devices.
系统采用电压空间矢量脉宽调制（SVPWM）技术并设计了具有自举功能的驱动电路。
The SVPWM technology was applied and the driving circuit with bootstrap function was proposed.
由PW M脉宽调制器驱动功率驱动电路，输出电流信号驱动比例电磁铁。
This output transferred thorough PWM driver circuit and changed into current signal to the proportional magnetic valve.
介绍了一种脉宽调制型功率因数测量电路的工作原理。
Introduced the principles of pulse modulating circuit for measuring power factor.
文章介绍一种将PAM脉冲幅度编码转换为PW M脉宽调制编码的方法和电路，转换过程使用数字方法实现。
This article relates to a method and circuit for the code translation from PAM to PWM. The process is digital.
并以三相半波可控整流电路、滞环比较方式的电流跟踪控制、利用S函数实现空间矢量脉宽调制为例说明了软件的使用方法。
Three-phase half wave controlled rectifier, hysteresis comparison mode current track control, and realization of SVPWM by S-Function are used as examples to describe the usage of the software.
脉宽调制器芯片是东北微电子所(47所)研制的一块集成电路芯片，课题是在该研究所完成的。
The chip is an integrated circuit chip which is researched by Northeastern Microelectronics research Institute (47 Institute). This article is completed in the Institute.
文中着重阐述系统和功放电路的工作原理、数字脉宽调制器的硬件电路、软件设计方法，并给出实验结果。
In this paper, the operation principles of the total system and power-amplifier circuit, design method of digital PWM hardware circuit and software are described, and.
文中指出，在晶体管化的脉宽调制器中，在效率和失真两个方面。PANTEL原理电路优于基本PD M电路。
So far as efficiency and distortion are concerned, the transistorized pulse-duration modulator by PANTEL method is proved to be superior to that by the basic PDM circuit.
提出一种等步距角的细分控制方法，并据此设计了恒频脉宽调制细分电路。
The paper mainly put forward a new control method of stepping motor which character-, ized by equal-stepped fine division, and then design a constant frequency PWM driver circuit.
机床电力拖动系统采用集成电路实现脉宽调制方式调速用IGBT管驱动电动机。
This article presents the application of IGBT-PWM regulating speed system in machine tool's electric drive.
分析了各部分的电路结构及特点，讨论了PW M脉宽调制信号生成、逻辑信号综合、驱动控制及电流截止负反馈的具体应用，在此基础上给出了实验数据及结果分析。
It analyses some main circuits's features, including PWM signals, logic synthesis, driver and negative feedback of current cut-off and at last gives the result of experiment.
分析了脉宽调制信号动态调节LED亮度的原理，设计了单片机控制电路；
The principle of PWM signals adjusting LED bright was analyzed, and the controlling circuit of MCU was designed.
该文提出一种采用一个门极可关断开关和六个晶闸管的新的PWM电流源逆变器，此电路通过有源换流来实现传统的晶闸管CSI的脉宽调制。
The paper presents a new PWM CSI using only one gate turn off switch and six thyristors. The converter uses active commutation to realize PWM in a conventional thyristor-based CSI.
该系统由数字控制器、脉宽调制波形显示电路、全桥变换器、直流电动机和光电编码器。
The system consists of a digital control system, a PWM control waveform display, a full-bridge converter, a DC motor and load motor.
采用高频脉宽调制功率驱动电路进行电磁阀的高速强力驱动，并利用电流微分信号有效反馈了控制阀关闭始点。
The ECU accomplishes the fast energizing of the solenoid valve by driving circuit with high frequency PWM, and detects the start of injection by the differential signal of driving current.
设计了由PW M脉宽调制技术构建的工作在速率控制模式下的反作用飞轮控制系统，并对其硬件电路进行了具体实现。
The reaction flywheel control system was designed by using PWM technology under the velocity control mode, and the hardware circuit was also set up.
采用脉宽调制（PWM ）技术发生脉冲信号，设计了控制电路和IGBT驱动保护电路，研制了专用脉冲电源。
The special pulse power supply is researched and manufactured. The PWM is adopted to produce pulse signal.
采用脉宽调制（PWM ）技术发生脉冲信号，设计了控制电路和IGBT驱动保护电路，研制了专用脉冲电源。
The special pulse power supply is researched and manufactured. The PWM is adopted to produce pulse signal.
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