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The device introduced can transform 12 V DC into 220 V/50 Hz AC by making use of sine pulse width modulating signals produced by the SG3525. 该电源利用脉宽调制器芯片SG3525产生正弦脉宽调制信号;实现了由直流12V到交流220V/50Hz的转换.
Pulse width modulator and sample maintenance installment. 脉冲宽度调制器和取样保持装置。
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。
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。
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。
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。
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。
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。
To reduce the current harmonics around switching frequency of the three-phase pulse width modulation (PWM) rectifiers,an LCL filter has been adopted. 此外,文中对LCL滤波的三相PWM整流器数学模型进行了详细的分析,并从理论和仿真两方面证明了LCL滤波器的优越性能。
This paper presented the principle of space vector pulse width modulation(SVPWM) employed in vector control system for asynchronous motors. 仿真结果表明采用SVPWM调制的异步电机的矢量控制系统具有良好的动态性能和稳态精度。
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。
A design to generate 8 bit to 16 bit resolution ratio pulse width modulated (PWM) outputs based on programmable counter array (PCA) is provided. 摘要给出了基于可编程计数器阵列PCA的8位到16位分辨率的PWM波形的生成方法。
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。
Abstract: This paper introduced the principle of induction-hearting and the makeup of pulse width modulated （PWM） induction-hearting power system. 摘要: 介绍了电磁感应加热的基本原理，详细说明了PWM串联型中频感应电源的原理及各部分组成。
This controller integrates pulse width modulation(PWM) and pulse density modulation(PDM) together,and can easily change between the two modulations. 该设计集成了脉冲宽度调制(PWM)和脉冲密度调制(PDM)两种调制方式,并可以在两者间切换。
This dissertation proposes a novel asymmetric pulse width modulation (PWM) scheme for four-switch three-phase (FSTP) brushless dc (BLDC) motor drives. 马达驱动系统一直是工业发展不可或缺的重要一环，降低马达驱动器的制造成本也是不变的趋势。