基于PWM正弦波电源研发设计.docVIP

摘 要 现代变频电源以低功耗、高效率、电路简洁等显著优点而备受青睐。变频电源的整个电路由交流-直流-交流-滤波等部分构成，输出电压和电流波形均为纯正的正弦波，且频率和幅度在一定范围内可调。ABSTRACT Modern frequency power to low power, high efficiency, simple circuit which favored some obvious advantages. The circuit consists of Power Supply AC - DC - AC - filtering parts, the output voltage and current waveforms are pure sine wave, and the frequency and amplitude adjustable within a certain range. With the emergence of high-performance DSP controller, power inverter digitalcontrol become a reality. Digital control system with integrated high anti-interference capability, flexible control, advanced control algorithms can be realized and the advantages of easy real-time control. Inverter using DSP as the control core, you can easily use the software flexible, precise control and full-line fault detection. This article introduces digital control technologies of a single-phase SPWM inverter based on TMS320LF2407.firstly, the basic structure and the control strategyof the inverter system have been introduced, then selects repetitive control strategy asthe control strategy for the inverter. Secondly, the bipolar SPWM control strategy and the univocal SPWM control strategy have been compared. Thirdly, according to the technique request of the inverter power supply, thepaper put forward the project of the hardware electric circuit and the control electriccircuit that is exceptionally introduced, accomplishes the designs of system softwareand hardware. The software carries out output wave control, creates digitalsinusoidal norm and implements logical control functions of inverter that is, inverter protecting, monitoring and measurement and so on. The inverter simulation model is established by the simulation software of MATLAB and SIMULINK, which is used to validate the feasibility of every controlstrategy. The research in the dissertation, to some extect has paved a way for thefurther research, improvement and application in the digital control of inverter.Putti