The system consists of the ac input stage , single phase pfc , main inverter , output low - pass filter , auxiliary power supply , etc . the power supply extremely has an important position in the electronics equipments 电源在电子设备中有着极为重要的地位，对变频电源的研究具有重要的理论意义和工程实用价值。
The control modes of the frequency conversion power for frequency inverter are discussed and analyzed . the technological parameters of control modes are enumerated 摘要对目前存在变频器的变频电源控制方式进行讨论，分析各种方式的优缺点，并给出变频电源不同控制方式的技术参数，以便工程技术人员更好地选型和设计。
Firstly , the pwm ( pulse width modulation ) , the instantaneous control technology and the digital technology of the inverter that is the crucial unit of the varying frequency power supply are introduced in brief in the paper 本文首先对变频电源的核心部件逆变器的脉宽调制技术、瞬时值控制技术和数字化技术作简要说明。
The control system of variable frequency electrical power consists of a single chip computer and a special chip , which fulfill the control function , simplify the current structure and reduce the production cost 变频电源的控制系统采用单片机和专用芯片相结合，在实现变频控制功能的前提下做到电路结构简洁而且成本低廉。
The paper analyses the principle of variable frequency source and brings forward that using electric electron technology make variable frequency output , and using high power dynatron that is parallel connection magnify power 文中对该变频电源的工作原理及主要硬件作了较详细的介绍；提出利用电力电子器件实现输出大功率。
The sin wave is stored in eprom , which is contributed to good performance of the power . the circuit is debugged well . its good and reliable performance is supported by experiments 绘制了其电路图，定制出了电路板，并调试了此电路板，实验证明此变频电源性能良好，运行稳定可靠，对提高电动机的运行性能和生产效率起到较好的作用。
This paper is focused on the study and design of three - phase cycloconverter which is related to these technologies : computer control , semiconductor converter , ac velocity adjustment , single - chip computer application and the computer simulation 本文通过应用计算机控制技术、半导体变流技术、交流调速技术和计算机仿真技术,设计了一个基于16位单片机的三相交-交变频电源装置。
To make sure the safety of the equipment that would be tested and the staff of testing , the protest circuit will reach more demanding . this paper make more use of the fast - cahinet ' s fast closing character in this kind of variable frequency source 为了保证被试品和人身安全，对于保护回路提出更高的要求，文中针对该变频电源的特点，利用快速可控硅的快速关断特性实现保护过程。
After research the variable frequency source successfully , we have research and exploit the technology of computer monitor for this variable frequency source . this progress increases safety and automatization for this equipment when it run in electrical system 在成功研制该变频电源后，还成功研究和开发了此设备的计算机监控系统，提高了该设备的使用过程中的安全性和自动化程度。
The variable frequency source have been used on the site for many times , which can resolve much question when test the high equipment . it is prove that this variable frequency source has much character : high reliability , efficiency safety , enough practicability 变频电源在实践中得到多次使用，并很好的解决现场进行高压试验时所遇到的问题，证明了此装置的可靠性高、安全性好、实用性强。
