The Design And Research Of Single-phase Inverter Power Based On Vector Tracking Control Theory

In recent years, with the continuous development of power electronics technology, inverter power has been applied in all walks of life and the requirement of inverter power is increasingly stringent. In the application, people always need high quality of output waveform, good dynamic performance and high steady state accuracy. Now the development trend of high-power three-phase power is becoming multiple small single-phase powers in parallel. So there are important research significance and practical value to study single-power with performance of simple structure as well as good dynamic and static characteristics.Firstly, this thesis describes the current and trend development situation of inverter power, and analyzes the theory and mode of sinusoidal pulse modulation in detail. By the analysis of single-phase inverter circuit theory, mathematical model of inverter power is established. At the same time, we make a detail analysis to continuous-time state space model, discrete-time state equation and SPWM control mode. Through studying large number of relative domestic and foreign literature, tracking control algorithms based on vector is been proposed in this paper. This control algorithm has good dynamic and static characteristics as well as strong load adaptability. Special software Matlab/Simulink is used to simulate inverter control system. Through the simulation with different load under the control algorithm and comparison of simulation result with single closed-loop control scheme, this control algorithm is verified its high-quality performance. At last, hardware circuit whose core is FPGA is designed. The circuit includes main control circuit, detection circuit and drive circuit. The circuit is the hardware implementation, and it is the key part of the practical application.