基于嵌入式的恒流，恒压和恒功率调整器的研究与设计

发布时间：2018-03-04 01:14

本文选题：dsPIC6014　切入点：可控硅　出处：《内蒙古师范大学》2013年硕士论文　论文类型：学位论文

【摘要】：在某些工控过程和有些特殊设备使用中,经常要求负载电路电流是恒定的或者电压是恒定的，有时要求功率是恒定的。目前国内外能满足恒流、恒压及恒功率要求的控制设备主要存在通信功能差、控制精度不高和实时性不好等问题。基于此，本文对可控硅的性能指标做了深入的分析，提出了可控硅调整器的总体设计方案，并实现了基于嵌入式的恒流、恒压和恒功率调节器。它具有全数字化，易于控制等特点。本课题主要是通过电流电压的采样电路来获得负载电路中的电流电压的实时值，并通过微处理器dsPIC6014来控制可控硅开关导通角的大小来实时、稳定地控制负载电路的电流、电压和功率。调整器的调节方式有两种，一种是通过手动键盘控制，，另一种是可以通过上位机远程控制。在硬件上主要研究了以dsPIC6014芯片为核心的最小系统的设计，同时研究电源模块电路、过零点检测电路、电流和电压采样电路，可控硅的触发电路、键盘电路等设计。在软件上主要用C语言和汇编混合编程来完成微处理器的初始化，可控硅的控制程序，数据采集程序，以及微处理器、键盘和PC机的相互通信。实验结果表明，该调整器可以基本实现对负载电路进行恒流、恒压和恒功率的实时控制，并且可以通过上位机对电流、电压等参数进行远程的监控。该课题的完成，为实现嵌入式的开发设计研究应用提供了理论和实践基础，具有广泛的实际应用价值。
[Abstract]:In some industrial control processes and in the use of some special equipment, it is often required that the current of the load circuit is constant or the voltage is constant, and sometimes the power is constant. At present, the constant current can be satisfied at home and abroad. The control equipment with constant voltage and constant power mainly has some problems, such as poor communication function, low control precision and poor real time. Based on this, the performance index of SCR is analyzed deeply in this paper. The overall design scheme of SCR regulator is presented, and the constant current, constant voltage and constant power regulator based on embedded system is realized. It has the characteristics of full digitization and easy control. In this paper, the real time value of current and voltage in load circuit is obtained by sampling circuit of current and voltage, and the current of load circuit is controlled stably by microprocessor dsPIC6014 to control the on-angle of thyristor switch in real time. Voltage and power. There are two ways to adjust the regulator, one is controlled by manual keyboard, the other is remote control by upper computer. In hardware, the design of minimum system with dsPIC6014 chip as the core is studied. At the same time, the design of power module circuit, detection circuit after 00:00, sampling circuit of current and voltage, trigger circuit of SCR, keyboard circuit and so on are studied. Silicon-controlled control program, data acquisition program, as well as microprocessor, keyboard and PC mutual communication. The experimental results show that the regulator can basically realize the real-time control of constant current, constant voltage and constant power of the load circuit, and can remotely monitor the current, voltage and other parameters through the upper computer. It provides a theoretical and practical basis for the research and application of embedded development and design, and has a wide range of practical application value.
【学位授予单位】：内蒙古师范大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP368.1;TM762

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