Fourthly, a set of practical srd system for experimental is developed, which based on dsp control technique and power electronics converting technique 其四,基于dsp控制技术和电力电子变流技术,开发设计了一套开关磁阻电机调速系统实验平台。
However, the application of the advanced transmission needs a long process because of its complicated technique and high expense . instead of it, the scanning converting technique is an effective way to improve the quality of the picture in current tv transmission 为了更好的满足人眼的视觉感受,大屏幕、多功能、高质量的电视有了很大的发展,同时由于更先进的电视传输方式技术难度大、成本高,其应用将是一个漫长的过程。
The whole large current testing system based on voltage-frequency converting technique has been finished in this paper, and the dc voltage signals, power frequency ac voltage signals are tested by this computer-testing system, the results are good, then the current of current-source in the synthetic circuit are tested by this computer-testing system 本文完成了一整套基于压频转换技术的大电流测试系统,首先测量了直流电压信号、工频交流电压信号,然后完成了对合成回路中电流源电流信号的测试。
A novel phase-shifted zero-voltage and zero-current switching pwm dc / dc full-bridge converter is presented in this thesis, which is based on the groundwork of summarization of the development of power electronics in recent years and lucubration in theoretical basis of modern high frequency soft switching power convert technique and analysis of operation principle, characteristic of the circuit and inherent drawbacks of the traditional phase-shifted zero-voltage switching pwm dc / dc full-bridge converter 本文在对近年来电力电子学科的发展高度综述和对现代高频软开关功率变换技术理论基础深入研究的基础上,对传统的移相控制zvspwmdcdc全桥变换器的工作原理、电路特性、存在的缺点进行了分析,在此基础上提出了一种改进型的移相控制zvzcspwmdcdc全桥变换器。
In the computer-testing system of current signal measurement of current-source in synthetic circuit, the following contents are included, such as voltage-frequency converting technique, optical fibre isolating and transmitting technique, singlechip testing and controlling, plotting and printing of sampled data on pc ( personal computer ) 电流源电流信号的计算机测试系统包括传感元件部分、压频转换部分、光纤隔离传输部分、单片机测控部分以及pc机对采集数据的波形绘制与打印部分。