通信开关电源及其嵌入式监控系统的研究与设计
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摘要
随着通信事业的发展,通信系统规模不断扩大,结构也越来越复杂。而通信电源被称为通信系统的“心脏”,关系到整个通信网运行质量和通信安全,在通信系统中占有极其重要的地位。为提高电源系统运行的可靠性,一方面,要对电源主电路本身做出改进,降低故障率；另一方面,对电源系统运行状况进行监控也十分重要。因此,本文对电源主电路的整流模块及其并联均流技术进行了详细的设计,引进了嵌入式技术和以太网技术设计电源监控系统,大大提高了整个通信电源的可靠性。
本文采用有源功率因数校正和移相全桥DC/DC变换电路来设计智能整流模块。重点分析了相关原理,设计了相关电路参数。文中介绍了电源并联运行的各种均流技术,对单模块的全桥DC/DC变换器和多模块变换器并联运行进行了小信号分析,运用最大电流自动均流法设计了多模块并联运行的三环控制系统,并利用Matlab对该并联系统进行了仿真研究。采用均流控制芯片UC3907设计了变换器的均流控制电路,实现了多变换器模块并联组成更大功率的电源系统。
电源监控系统部分设计了一个数字嵌入式监控器,在设计中提出了一种基于ARM的设计方案,选用PHILIPS公司的LPC2214芯片为核心,搭建了嵌入式系统的硬件平台,并针对现行普遍应用的串口通信的弱点,提出了以RTL8019AS为以太网接入的物理通道,构建嵌入式硬件通信网络平台。为实现嵌入式电源监控系统各功能,搭建软件平台,完成嵌入式操作系统μC/OS-Ⅱ的移植。主要工作包括系统启动代码和基于LPC2214硬件平台的移植代码的编写。针对嵌入式电源监控系统中的应用,编制基于μC/OS-Ⅱ操作系统具体的应用程序,完成任务的划分和创建,任务优先级的确定的设计与实现。
With the development of communication industry, communication system in general continues to expand the scale and becomes more and more enormous and complicated. The communication power supply known as "the heart" of the communication system, is closely related to the entire communication network operation quality and communication security, and plays an important role in the communication system. In order to improve reliability of the power supply, on one hand, must improve main circuit of the power supply and decrease failure rate; on the other, it is also very important to monitor operational status of entire system. Therefore this article detailed designs rectification module of the main circuit and parallel current sharing technology, and introduces Embedded Technology and Ethernet Technology to design monitoring system, and greatly improve reliability of the power supply.
The active PFC and phase-shifted full-bridge DC/DC convertor is used to design the rectification module, and emphatically analyze related theories and design related circuit parameters. The methods of parallel current sharing of rectification modules are introduced. The small signal model of the single full-bridge DC/DC convertor module and the multi-models are analyzed. Using the method of the maximum current automatic current sharing to design a three-loop control system of the multi-modules parallel, and accomplish simulation study of the parallel system in the Matlab. The UC3907 that is current-sharing controller is used to design the current-sharing circuit, and it realizes paralleling multi-module to compose of power supply system much more huge than one module.
A digital embedded monitor is designed for the power monitoring system, presents an ARM-based design, selects PHILIPS LPC2214 chip as the core, and builds an embedded system's hardware platform. For the weaknesses of the serial communication that is general application proposing to use RTL8019AS for Ethernet access, and building an embedded hardware platform for communications networks. In order to achieve various functions of the embedded power supply monitoring system, building software platform and completing embedded operating systemμC/OS-Ⅱporting. Its main duties include the system boot codes and portable codes on the hardware platform based on the LPC2214. For applications of the power monitoring system, compiling the appropriate program based onμC/OS-Ⅱ, and completing the creation and division of tasks, and fixing task priority.
本文采用有源功率因数校正和移相全桥DC/DC变换电路来设计智能整流模块。重点分析了相关原理,设计了相关电路参数。文中介绍了电源并联运行的各种均流技术,对单模块的全桥DC/DC变换器和多模块变换器并联运行进行了小信号分析,运用最大电流自动均流法设计了多模块并联运行的三环控制系统,并利用Matlab对该并联系统进行了仿真研究。采用均流控制芯片UC3907设计了变换器的均流控制电路,实现了多变换器模块并联组成更大功率的电源系统。
电源监控系统部分设计了一个数字嵌入式监控器,在设计中提出了一种基于ARM的设计方案,选用PHILIPS公司的LPC2214芯片为核心,搭建了嵌入式系统的硬件平台,并针对现行普遍应用的串口通信的弱点,提出了以RTL8019AS为以太网接入的物理通道,构建嵌入式硬件通信网络平台。为实现嵌入式电源监控系统各功能,搭建软件平台,完成嵌入式操作系统μC/OS-Ⅱ的移植。主要工作包括系统启动代码和基于LPC2214硬件平台的移植代码的编写。针对嵌入式电源监控系统中的应用,编制基于μC/OS-Ⅱ操作系统具体的应用程序,完成任务的划分和创建,任务优先级的确定的设计与实现。
With the development of communication industry, communication system in general continues to expand the scale and becomes more and more enormous and complicated. The communication power supply known as "the heart" of the communication system, is closely related to the entire communication network operation quality and communication security, and plays an important role in the communication system. In order to improve reliability of the power supply, on one hand, must improve main circuit of the power supply and decrease failure rate; on the other, it is also very important to monitor operational status of entire system. Therefore this article detailed designs rectification module of the main circuit and parallel current sharing technology, and introduces Embedded Technology and Ethernet Technology to design monitoring system, and greatly improve reliability of the power supply.
The active PFC and phase-shifted full-bridge DC/DC convertor is used to design the rectification module, and emphatically analyze related theories and design related circuit parameters. The methods of parallel current sharing of rectification modules are introduced. The small signal model of the single full-bridge DC/DC convertor module and the multi-models are analyzed. Using the method of the maximum current automatic current sharing to design a three-loop control system of the multi-modules parallel, and accomplish simulation study of the parallel system in the Matlab. The UC3907 that is current-sharing controller is used to design the current-sharing circuit, and it realizes paralleling multi-module to compose of power supply system much more huge than one module.
A digital embedded monitor is designed for the power monitoring system, presents an ARM-based design, selects PHILIPS LPC2214 chip as the core, and builds an embedded system's hardware platform. For the weaknesses of the serial communication that is general application proposing to use RTL8019AS for Ethernet access, and building an embedded hardware platform for communications networks. In order to achieve various functions of the embedded power supply monitoring system, building software platform and completing embedded operating systemμC/OS-Ⅱporting. Its main duties include the system boot codes and portable codes on the hardware platform based on the LPC2214. For applications of the power monitoring system, compiling the appropriate program based onμC/OS-Ⅱ, and completing the creation and division of tasks, and fixing task priority.
引文
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[28]刘宝贵,张旭著.通信电源设备使用维护手册-通信用直流供电系统[M].北京：人民邮电出版社,2008.74～87
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