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- power width modulation 脉宽调制
- Therefore, we use unipolar switching pulse width modulation scheme to realize a filterless Class-D power amplifier. 因此，我们利用单极性切换脉波宽度调变技术去实现无滤波器之D类放大器。
- Under condition of floating power supply pluse width modulation autocontrol is used to stabilize operation of neutron generater in high temperature circumstance. 在悬浮式系统中采用脉宽调制式气压自动控制，保证了中子发生器能在高温条件下稳定工作。
- A new optimal pulse width modulation(PWM) technique with unsymmetrical switching angles was introduced for high power applications. 针对大功率逆变器的应用介绍了一种基于不对称开关角的优化脉冲宽度调制方法。
- The controller, which adopts PIC16F877 as the master control chip, controls the coils with PWM (pulse width modulation) through power devices. 控制器以PIC16F877为主控制芯片，通过功率器件对线圈实行分组PWM（脉冲宽度调制）控制。
- 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。
- Switching Power Supply has three kinds of control circuits: Pulse Width Modulation (PWM), Pulse Frequency Modulation (PFM), Pulse Width and Frequency Modulation (PWM-PFM). 开关电源有三种控制方式：脉冲宽度调制(PWM)、脉冲频率调制(PFM)、脉冲宽度频率调制(PWM-PFM)。
- The paper presents a novel ultra-audio frequency (UAF) induction welding power based on ZCS-PWM(Zero Current Switching-Pulse Width Modulation) technology. 介绍一种基于ZCS-PWM(零电流开关-脉宽调制)技术的新型超音频感应焊接电源。
- This scheme introduces zero voltage resonant technology of pulse width modulation and phasing resonant controller UC3875,and its application in power converter. 介绍了相移脉宽调制零电压谐振技术和相移脉宽调制谐振控制器UC3875的性能及其在功率变换中的应用。
- 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。
- A micro ball screw and PWM(Pulse Width Modulation) servo amplifier based on Smart Power IC SPIC are applied in this system. Higher accuracy, band width, linearity, efficiency and linear displacement output are characteristics of the system. 该系统采用了航空精密微型滚珠螺旋副和基于智能功率集成电路（SmartPowerIC－SPIC）的PWM（PulseWidthModula－tion）伺服放大器，具有精度高、频带宽、线性度好、效率高和线位移输出方式等特点。
- 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。
- Abstract: In this paper, we describe the design and function, application of the power unit controller for mini RF excited CO2 laser, pulse width modulation (PWM) is the convenient way to vary the laser average output power from 1%to 100%of maximum. 文摘:述了小型RF激励CO2激光器的功率控制器设计、功能和应用，根据脉宽调制原理可以方便地把激光功率从1%25变化到100%25。
- 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。
- Pulse width modulator and sample maintenance installment. 脉冲宽度调制器和取样保持装置。
- 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。
- 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。
- A novel current control mode pulse width modulation switched high frequency resonant arc igniting device is developed based on UC3842 and the principle is analyzed. 摘要采用UC3842设计了电流控制型脉宽调制开关式高频振荡引弧器，并对其工作原理进行了分析。
- 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。
