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电力机车空调逆变电源
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摘要
随着电力电子技术的不断发展,电气传动控制在现代化建设中起着极为重要的作用。而由于满足高性能、节能和环保的要求,交流调速控制系统以其特有的优点在电气传动控制中占有越来越大的比重。
     本文研究和实现了基于DSP的交流异步电机变频调速控制系统,利用TI公司的TMS320F2812电机专用控制芯片作为控制核心,设计了电机驱动模块及电源模块。
     本文首先介绍了交流调速基本类型、调速的基本原理及其实现装置和开环电压空间矢量的U/F控制原理,然后在输入调理电路一整流及直直变换的基础上,重点阐述了变频器逆变的设计与研究。利用DSP构成控制系统,通过汇编和C语言混合编程的方法实现了开环电压空间矢量的U/F控制的变频调速控制策略。
     在此基础上,在频率为30Hz和50Hz下,做了功率为3kW负载电机实验。通过实验结果与MATLAB仿真的波形进行比较,证明了该调速控制系统可以实现在5~50Hz范围内平滑调速,且具有良好的动静态调速性能,验证了系统设计的有效性、可行性。
     结果表明,基于DSP芯片的变频调速系统性能优良,运行稳定,抗干扰能力强,电机运行噪音小,不失为一套具有先进型、新颖性、实用性的控制系统。
With the development of power electronics, electric drive control plays an increasingly important role in modern societiy. The AC variable-frequency speed regulating system becomes more and more important in the electric drives for its high performance, environmental protection and energy conservation.
     The paper presents a DSP-based motor VVVF control system, by using TMS320F2812 motor control chip of TI Company as the core control. It presents the design of the motor drive module and power modules.
     In this paper, it first introduces the basic types of AC drive, the realization of the basic principles of open-loop voltage devices and space vector of the U / F control principle.Then based in conditioning circuit - Rectifying and DC-DC conveter, it presents the design and research of frequency conveter. It makes a control system by DSP, and relizes the open-loop voltage space vector of the U / F control of the VVVF control strategy through the compile, C programming language.
     Based on these analysises, we made experiments of 3kW load in the frequency of 30 Hz and 50 Hz. Comparing with the experimental results and MATLAB simulation waveforms, it shows that the AC drive system can achieve smooth speeding in 5 to 50Hz, besides, it has a good dynamic and static AC drive performance, so it confirms the effectiveness and feasibility of the system.
     The results showed that the DSP-based frequency control system has a excellent performance, stable operation, well anti-interference capability and it is a set of advanced type, innovative, practical control system..
引文
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