Second based on mc33035 , the writer designs a multi - state and multi - obstacle protection control system by connection of scm 80c196kb . the control system can be applied for the motor of dynamoelectric cars 接着，作者在mc33035的基础上，引入控制芯片单片机80c196kb制成一个多工况、多重故障保护的电机控制系统，该控制系统可以用于电动汽车电机的控制上。
This thesis not only analysed the serious results of deviation of electricd pressure , which was harm for equipments and personal safety , caused by disconnection of null line , but also proposed effective protecting measure for mulfunction , such as repetition earth protecting measures and so on 摘要分析了零线断线造成电压偏移而对设备和人身安全带来的严重后果，提出了重复接地等有效的故障保护措施。
The protection constitution of connecting the ground can cut off the troubling electric circuit quickly and effectively before causing the personal casualty , a fire trouble and circuit to damage , and thus protecting the personal safety and reducing the occurrence of the trouble 摘要接地故障保护设置能在故障线路引起人身伤亡、火灾事故以及线路损坏之前，迅速有效地切断故障电路，从而保护人身安全，减少事故的发生。
Full bridge phase - shifted zero - voltage - switched converter ( fbps - zvs converter ) is a successful implementation for soft - switching and is easy for usage in dc / dc converter . the core technique to reach digitalization is dsp technique . in order to reach both high frequency and digitalization of converter , a fbps - zvs converter based on dsp control is proposed in this paper the converter worked on the high frequency of 150k . periphery hardware circuit is simple and its bulk is small . the converter realizes soft - switching over half load and get a high efficiency . it achieves the aim of digital control and error protect 实现数字化的核心是dsp技术。本文立足于将开关电源的高频化与数字化相结合，具体研究内容为一种基于dsp控制的移相全桥软开关zvs变换器，该变换器工作于较高的开关频率( 150k ) ，外围硬件电路结构简单、器件少、体积小；在半载以上实现了开关管的zvs开关，取得了较高的变换效率；实现数字化控制与故障保护，变换器取得了较好的性能效果。
Jdy - 280b double electromagnetic lock product characteristic : strong holding force , no left magnet easily installed , low noise , durable no mechanical failure with signal feed back function applications : can be used with intercoms and access control systems , especially for fireproof door working voltage : 12vdc 24vdc working current : 12vdc 0 . 27a , 24vdc 0 . 46a power consumption : 3 . 3w , 3 . 5w , absolutely insulative power supply mode : successively working temperature : - 40 50 dimension : 473 x 45 x 30mm weight : 3920g yiwu qimingxing computer company copy right Jdy - 280b双开门磁力锁产品特性:吸力强无剩磁安装方便噪音低寿命长具故障保护功能，无机械故障可具资讯回馈功能锁状态有指示灯指示：锁门时绿灯指示灯亮开门时,红色指示灯亮带锁状态指示灯及联网信号输出适用范围：可与楼宇对讲门禁系统配套使用特别适用于逃生门防火门电气性能：电气性能：使用电压： 12vdc 24vdc电流： 12vdc 0 . 53a 24vdc 0 . 27a绝缘电阻测试： dc500v 1分钟无击穿通电形式连续使用温度： 40 50外形尺寸： 473 x 45 x 30mm重量： 3920g
According to the safety requirements of underground electrical equipment , an excellent intrinsically safe pilot circuit is designed , the fault characteristics and protection principle of asynchronous motor with single speed and double speed used in underground are simultaneously analyzed , the function parameters corresponding to the fault protections for high capacity motors are determined . at the same time , module program design method and compiled monitoring program and function subprograms are emphatically described 根据矿井生产安全要求，设计了性能优良的本质安全型先导电路，分析了单速异步电动机和双速异步电动机的各种故障特征和保护原理，确立了每种故障保护的动作指标，介绍了结构化程序的设计方法，设计了监控程序及各功能模块程序。
In addition , according to the safety requirements of underground electrical equipment , the fault characteristics and protection principle of asynchronous motors with single speed or double speed used in underground are simultaneously analyzed , the function parameters corresponding to the fault protection for high capacity motors are determined . at the same time , module program design method and compiled monitoring program and function subprogram are emphatically described . especially , more attention is paid to the design philosophy , operation principle , hardware block diagram and software flow chart of mcs 根据矿井生产要求，分析了异步电动机的各种故障特征和保护原理，确立了每种故障保护的动作指标；设计了主控制板的硬件电路；根据结构化程序的设计方法，设计了监控程序和各功能模块程序；并且分析了工业生产环境存在的干扰源及所产生干扰信号的特征，针对不同特征的干扰信号，制定了相应的硬件、软件抗干扰措施。
Abstract : the system composed of intelligent control modules for three - phase induction motors is introduced in this paper . this module can conduct starting , reverse braking , and reverse conrtol with current limiting resistance . besides , it can also detect low voltage , overload , and open circuit of 1 or 2 phases , and do protection according to the detection . it especially fits to the controlling of motors which often do starting , braking and reversing 文摘:介绍了一种智能三相电机控制模块组成的系统，能在串电阻(电抗)起动、反接制动和换向控制的基础上进行欠压检测、过载检测、断相检测及电机故障保护.尤其适用于起动、制动和换向控制频繁的电机控制场合
In chapter 7 , using the conclusions drawn before , we introduce three different architectures of the abundant system of profibus - dp , together with their working mechanisms and their respective functions . thus , we have developed a set of measurements to improve the reliability of profibus - dp 论文的第七章应用前面研究和分析的成果，具体提出了三种不同的profibus dp冗余系统构架形式，并给出了它们的体系结构，对它们的工作机理和能够实现的故障保护功能进行了分析。
