外文翻译电气工程及自动化.doc

外文翻译电气工程及自动化
毕业论文英文翻译资料
题目: 直流开关稳压电源的保护技术
院(系): 电子电器工程系
专业: 电气工程及其自动化
学生姓名:
班级:
学号:
指导教师:
2012年 12月10日
DC Switching Power Supply Protection Technology
Abstract: The DC switching power supply protection system, protection system design principles and machine protection measures, an analysis of switching power supply in the range of protected characteristics and its design methodology, introduced a number of practical protection circuit.
Keywords: switching power supply protection circuit system design
A、IntroductionDC switching regulator used in the price of more expensive high-power switching devices, the control circuit is also plex, In addition, the load switching regulators are generally used a large number of highly integrated electronic systems installed devices. Transistors and integrated device tolerance electricity, less heat shocks. Switching Regulators therefore should take into account the protection of voltage regulators and load their own safety. Many different types of circuit protection, polarity protection, introduced here, the program protection, over-current protection, over-voltage protection, under-voltage protection and over-temperature protection circuit. Usually chosen to be bination of protection, constitutes plete protection system.
B、Polarity protection
DC switching regulator input is generally not regulated DC power supply. Operating errors or accidents as a result of the situation will take its wrong polarity; switching power supply will be damaged. Polarity protection purposes, is
to make the switching regulator only when the correct polarity is not connected to DC power supply regulator to work at. Connecting a single device can achieve power polarity protection. Since the diode D to flow through switching regulator input total current, this circuit applied in a low-power switching regulator more suitable. Power in the larger occasion, while the polarity protection circuit as a procedure to protect a link, save the