电车空调系统变频器计算机模拟程序的设计

电气工程论文编号:DQ106   论文字数:18927,页数:46

目  录
摘  要 II
1  绪论 1
2  系统总体设计介绍 2
2.1  汽车空调的工作原理 2
2.2  系统功能介绍 2
2.3  系统硬件结构 3
2.4  空调操纵器 3
2.4.1 功能 3
2.4.2 技术参数 4
2.4.3 操作按键与显示说明 4
2.4.4 空调操纵器电气接口定义 5
2.5  关于空调系统的保护 5
2.5.1 蒸发器温度过低保护 5
2.5.2 制冷系统压力保护 5
2.5.3 空调系统制冷重新启动延时保护 5
2.5.4 其它功能 6
2.6  故障代码 6
3  Modbus通信协议 7
3.1  Modbus协议简介 7
3.1.1 在Modbus网络上转输 7
3.1.2 在其它类型网络上转输 7
3.1.3 查询—回应周期 8
3.2  两种传输方式 9
3.3  Modbus消息帧 10
3.4  错误检测方法 12
3.5  Modbus功能码 14
3.6  通讯变量表 18
4  AD200A/B变频器 19
4.1  AD200A/B变频器简介 19
4.2  串口通行协议 19
4.3  模块化结构 20
4.4  简便易用设计 20
4.5  变频器与操作器的连接应用 20
5  Vb语言 24
5.1  VB编程程序的基本思路 24
5.2  VB程序的特点 24
5.3  串口通信控件 25
5.4  vb编程的CRC校验 26
5.5  vb编程的模拟变频器 27
5.6  vb环境中模拟变频器控件和它所对应的程序 28
6  总结 39
附录  模拟变频器的操作界面图 42

摘  要
 近年来，随着私家车数量的急剧增加，道路拥挤状况日益加剧，越来越多的人选择城市公交客车作为他们的出行代步工具。城市公共交通在我国城市交通中占有重要的地位,是同我国城市居民生产、生活等活动密切相关的系统，而空车的空调系统好坏直接关系到乘客在乘坐时的舒适性。随着国内客车行业的发展，对空调系统的要求日益提高。作为空调系统核心控制部件，对控制器的性能也提出了更高的要求。不仅要求其工作可靠，而且要求外形美观，人机界面友好。Modbus协议是应用于电子控制器上的一种通用语言。通过此协议，控制器相互之间、控制器经由网络（例如以太网）和其它设备之间可以通信。它已经成为一通用工业标准。有了它，不同厂商生产的控制设备可以连成工业网络，进行集中监控。AD200A/B 系列通用电机驱动器将通用变频器的强大应用功能、使用的方便灵活与伺服驱动器的高性能(高精度、高速动态响应、高过载能力)、强大的位置和转矩控制能力进行了深度融合，使它具有比常见伺服驱动器更加广泛的应用领域和更加灵活的操控自由度。也解决了通用变频器由于调速精度低、转矩响应慢造成的应用障碍。
 
关键词：操纵器，modbus协议，AD200A/B系列变频器

Abstract
In recent years, With the number of private cars increased dramatically, road congestion increased dramatically,more and more people select a city bus as their travel tools .Urban public transport in urban transport in China occupy an important position , It has urban residents with the production, life and  other activities closely related to the system , and the bus air-conditioning systems have a direct bearing on the passengers in comfort. With the development of domestic industries bus, the demand of air-conditioning systems is increasing. As air-conditioning systems core components control, the performance of the controller also has a higher demand. Its work requires not only reliable, but also for the aesthetic appearance, HMI friendly.Modbus protocol is used in the electronic controller of a common language. With this agreement, each controller, the controller through the network (such as Ethernet) and other communication devices can be. It has become a common industry standard. With it, the production of different vendors can not even control equipment into the industrial network, centralized control. AD200A / B Series General Electric will drive a powerful general inverter applications, the use of the flexibility and convenience of high-performance servo drives (high-precision, high-speed dynamic response, high Guozainengli), a powerful position and torque control capabilities The depth of integration, it has frequently than the servo drive more wide-ranging applications and more flexible control of the degree of freedom. GM has also solved the inverter due to low precision speed, torque caused by the slow response to the application of obstacles.

Keywords：Controller，modbus agreement，AD200A / B Series Inverter