【作者】 常栋梁；

【导师】 刘树林；

【作者基本信息】 西安科技大学 ， 电力电子与电力传动， 2008， 硕士

【摘要】 随着电力电子技术的发展,电力电子变换器的控制技术变得愈来愈复杂。微处理器及其外围电路的发展,使得数字控制技术所存在的一些问题不断得到改善,并在某些方面逐渐取代模拟控制技术实现系统的控制功能。随着电力半导体器件不断地向高频、高效和智能化方向发展,电力电子控制系统的实时性要求越来越高。随着重要部门、用电设备对高品质的电源和电能质量的需求日益增多,高性能PWM控制器的研究越来越受到关注,数字控制以其诸多的优点在某些方面正逐步取代模拟控制。数字PWM控制器获得了更多的设计自由,可以轻松实现各种复杂、智能的数字算法来提高性能,与此同时,传统控制方案在数字控制中仍发挥着重大作用,先进的数字控制算法与传统控制相结合是目前应用的主流。近年来,可编程逻辑器件不断向高集成度、高速度和低价位方向迈进,在信号处理领域的应用不断扩大,与MCU相比,CPLD/FPGA器件具有更高的处理速度。本文针对可编程逻辑器件具有设计灵活、集成度高、速度快、设计周期短等优点,提出将其应用于电力电子的控制技术以满足对实时性要求很高的应用场合。本文详细分析了应用可编程逻辑器件FPGA实现PWM控制器的原理和方法,提出了一种采用FPGA实现电力电子变换器控制电路的方案,将A/D采样控制电路、控制算法电路和PWM波形生成电路等全部集中于FPGA内部,大大降低了电路的复杂程度。将所设计的基于FPGA的数字控制器应用于Boost变换器,进行了仿真和试验研究,结果验证了可编程逻辑器件的高速处理性能及所设计控制器的可行性。更多还原

【Abstract】 With the rapid development of power electronics, control technique applied in the power electronic converters becomes more and more complex. Great progress of microprocessor and peripheral circuit causes distinct improvements in digital control techniques. Then, the digital control technique will gradually substitute analog in some aspect control technique for controlling power electronic system.Power semiconductor devices develop continuously for high frequency, high efficiency and intellectualization. It demands that power electronic control system has much higher real-time capability. With the demands of important departments and electric equipments for higher quality power supply ascending, high performance PWM controller are taken more and more attention. With its incomparable merits, digital control is gradually taking place of analog control in some aspect. On the one hand, digital PWM controllers gain more freedom for design, with which kinds of complicated and intelligent algorithms can be implemented easily; on the other hand, the traditional strategies are still playing an important pole in the digital control. The hybrid strategies of the advanced digital strategies and the traditional ones are now most accepted in the product application.In recent years, Programmable Logic Devices (PLD) stride continuously forward high integrity, high speed and lower price, which are applied more far and widely in signal processing. Compared with MCU, CPLD/FPGA has much higher speed. Aiming at the advantages of PLD such as high integrity, high speed, designed agility and short cycle of design, a new scheme that uses PLD in power electronic control technique for high real-time’s capability is brought forward in this paper.In this paper, the principle and method that making use of FPGA to realize high accurate PWM controller are chiefly analyzed, A novel way of control circuit is mentioned for power electronics converters with FPGA. The units of A/D sampling control, realization of control arithmetic and generation of PWM waveforms are completely integrated in FPGA, which reduces the perplexity of circuit. Then, The digital controller based-on FPGA is applied in the Boost Converter. The emluation and experiment is performed. The results prove that the PLD have high speed processing capability interiorly and the digital controller based-on FPGA has a good performance.更多还原