Study Of AC/DC Reversible Converter

With the developments of technology, the performance of traditional phase—control rectifier has not met with the requests of industry, such as low—powerfactor and high—frequency harmonic compensation. The conventional rectifierproduce harmonic problem in power system. While three-phase PWM(pulse widthmodulation) rectifier can provide alterable DC bus voltage,get unity power factorand get low harmonic distortion of input current. It also has line power feedbackcapability. So it is becoming interested in power electronics field. With thedevelopment of large-scale integrate circuit technology, by using DSP(DigitalSignal Processor) as the control center will become the main stream of rectifiercontrollers in the future.This thesis mainly introduces PWM rectifier, including its mathematical model,control strategies, the design and choice of the main circuit parameters and itshardware. It deals with the design of the DSP-based rectifier’s hardware and theflowchart and realization method of its software from the aspects of control circuit,measuring circuit, main circuit and the method of realizing SVPWM. On the basisof deducing the rectifier’s mathematical model，the MATLAB simulation model isachieved, and the validity of the mathematical model are confirmed by simulationresult．At last, the full digital rectifying control system is composed which theTMS320F2812DSP is its core and is applied experimental test through the debugof software and hardware．Analyzing the experimental result，the control schemerealizes the high power factor of system，makes the system operating in AC/DC orDC/AC converter and achieves the energy reproduction．...