ARM永磁开关驱动电路设计
摘要为良好地驱动10kV永磁真空断路器，使其能适应开断关合农网、城网和小型电力系统的负荷电流、过载电流和短路电流的需要，本文从实践经验出发并结合相关技术知识，研究开发一种永磁开关的驱动电路。65276
本文分析了永磁开关驱动电路的工作原理与设计需求，同时对设计的硬件结构与软件开发过程作了详细的阐述。驱动电路主要以ARM微控制器LPC2366为核心，驱动IGBT桥式电路控制电容对永磁机构线圈放电，完成了交流采样，判断故障，发出信号，驱动开关等一系列动作。系统主要由核心控制单元，交流采样模块，电子驱动模块等组成。硬件设计包括芯片选型和电路设计等工作，软件设计则包括编写驱动程序，封装功能函数及其应用。
经测试本文所设计的永磁开关驱动电路能达到实际应用的需求，能有效地驱动10kV永磁真空断路器在正确时刻动作，提高了供电可靠性。
毕业论文关键词 真空断路器 驱动电路 永磁机构 ARM IGBT
毕业设计说明书（论文）外文摘要
Title Design of a Driving Circuit for Permanent Magnet Switch
Abstract
To drive permanent magnet 10kV vacuum circuit breaker, so that it can adapt to breaking load current, overload current and short-circuit current for rural, urban and small power system. According to the practical experience and technical knowledge, we research and develop a kind of driving circuit for permanent magnet switch.
This paper analyzes the working principle of permanent magnet switch and its driving circuit, while the design process of the hardware and software were elaborated. The controller is mainly based on the ARM micro controller LPC2366, driving the IGBT bridge circuit to control the charge and discharge of coil in the permanent magnet actuator. The functions of AC sampling, determining fault, sending message, driving switch are included. The system mainly consists of the control unit, AC sampling module, electronic driving module and so on. Hardware design includes chip selection and circuit design, software design includes write drivers, package performance function and its application.
According to the test, the switch drive circuit match practical applications. It can drive circuit breaker efficiently at the right time which improve the reliability of power supply.
Keywords Vacuum Circuit Breaker, Driving Circuit, Permanent Magnet Actuator, ARM, IGBT
目 次
1 绪论 1
1．1 课题背景及研究意义 1
1．3 本文主要工作 3
2 永磁开关驱动原理 4
2．1 永磁机构驱动原理 4
2．2 电路故障原理 5
2．3 IGBT桥式驱动电路原理 5
3 系统总体设计 6
4 系统硬件设计 6
4．1 电源模块设计 7
4．2 核心控制模块设计 9
4．3 交流采样模块设计 11
4．4 电子驱动模块设计