【作者】 葛潇敏；

【导师】 李中年；

【作者基本信息】 武汉理工大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 电动机是将电能转化成机械能的装置，用作拖动各种生产机械的动力。电动机因具有结构简单、价格低廉、使用维护方便等优点，在国民经济中占有举足轻重的地位。然而，由于供电状态和机械负荷的多变性，使得电动机的故障率较高，不仅会损坏电动机本身，而且会影响整个生产，造成较大的经济损失。因此，电动机的安全运行对保证厂矿企业的正常生产是非常重要的。文中首先分析了TPIM(Three-Phase Induction Motor)的常见故障，以对称分量法为依据，采用检测过流幅值、负序电流、零序电流的方法，并综合考虑电压、温度等参数，得出了TPIM故障的准确判据，确定了各种故障的保护措施，对TPIM实现了三相短路、堵转、过载、相间短路、断相、三相不平衡、短路接地、漏电、超温、欠压、过压、起动时间过长、频繁起动等保护功能；在故障诊断上，实现了基于实时专家系统的TPIM故障诊断；在硬件实现上，以TI公司的TMS320F2812为核心，外接点阵液晶显示器、按键等外设。其具有中文显示、菜单式操作、故障自诊断、参数调整灵活、保护功能完善等特点。这样便实现了TPIM保护的智能化。软件采用模块化的程序设计，模块化编程使程序开发更有效，小块程序更容易调试和修改。程序采用C语言和汇编语言混合编写，用C语言设计软件的调度程序以及对速度要求不高的控制部分的相应程序，而用汇编语言设计运行速度高的处理模块程序，供C语言调用，这种混合语言编程方法可实现最佳的软件设计方案，从而达到兼顾速率和效率的要求。文中完成了保护算法和程序的设计研究，阐述了整个软件设计思路和程序实现的流程并实现了数据采样。该系统设计从软件设施和硬件设施两方面进行了对系统抗干扰能力的潜心研究与策划，构建了诸如：抑制干扰源、阻塞耦合通道、提高敏感设备的抗干扰能力、双接触器工作方式、数字滤波、加入空指令、设置看门狗、设置软件陷阱等具体抗干扰设施，从而提高系统工作的安全性和可靠性。限于时间关系、经费关系、人力物力等方方面面的关系，此课题涉及的后续工作，有待于下一届的师弟师妹们完成。更多还原

【Abstract】 The electromotor is a kind of system which converts electruic energy into mechanical energy. It is used for the power to drive the manufacturing machine. The electromotor plays a dicisive role in the national economy for its simple structure, low price, convenient use and maintenance. However, the polytrope of power supply state and mechanical load makes higher hazard rate of the electromotor, which not only damages the electromotor, but also influences the total manufacture, and causes enormous economic losses. Therefore, in order to guarantee the normal production of the industrial enterprise, the safe operation of the motor is very important.First, the text analyzes the common fault of the TPIM, bases on the symmetrical component method, detects overcurrent amplitude, negative sequence current, zero-sequence current, and considers the parameter such as voltage and temperature, then we can obtain the exact criterion of the electromotor fault, fix the safeguard about all kinds of the fault, and achieve the protection feature about threephase short-circuit, locked-rotor, overloading, phase fault, phase failure, unbalanced threephase, line-to-ground, creepage, excess temperature, undervoltage, overvoltage, excessive starting, jogging; in protection theory, it achieves the fault diagnosis of the electromotor based on real-time expert system; in hardware system, it is centering on powerful TMS320F2812 of TI Co., and links the perpheral such as LCD, keystoke, real-time clock module. Also, the TPIM intelligent protector has the following functions: Chinese display, menu manipulation, fault self-diagnosis, flexible parameter adjustment, perfect protection feature. In this way, the automatic protection is realized.The software detects modularization programmer, and the modularization programmer makes the program development more effective and subprogram easier to debug and modify. The program is compiled mixed by C language and assemble language. The C language compiles the scheduler and the control part which has low require on speed; and the assemble language compiles the processing module with top speed, which is transferred by C language. This method provides best software design scheme and gives attention to speed and efficiency of program running.The design does involved research and devisal about anti-jamming from both haedware and software, constructs many concrete anti-interference installation, such as: interference source suppression, channel coupling check, increasing capacity against disturbance of sensor, double contactor mode, digital filtering, add in blank command, install house dog, install software reap, to have a higher reliability.The involved follow-up work of the issue, limited to time, funds, human, material and so on, needs the following to accomlish.更多还原