Dsp-based Frequency Power Supply

Medium frequency power is widely used in aircraft, ship and vehicles which requires high quality of power. It provides pure and stable sine waves with little distortion while it has the advantage of smart and agile system. However, the products in the market controlled in the analog method have their shortcoming in their complicated elements and less agility. The paper discussed a digital medium frequency power, by using a TMSLF2407A chip.Mathematical models were settled in continuous and discrete space, SPWM modulation was designed, a closed loop was designated to improve quality of the wave and voltage stability, which take combination of digital PID and repetition algorithm, aslo their models and realization were given.A simulation was taken to calibrate the index and system before we connect the hardware, simulation software were introduced, MATLAB was used in this paper to simulate the model, as well as dynamic process and analysis of the system .The structure of the system and hardware design was given, the types of the components and its data were chosen according to the compute. The hardware map was designed by protel DXP, including main circuits and protection circuit, the votage and current circuit take advantage of LEM for the detection. The minimum control system was designed, including the design of JATG debugger circuit, reset circuit an extended store circuit.A brief introduction was on ccs IDE of Ti, the dataflow of the program and time sequence of the interrupt was detailly given, SPWM modulation program and each sub-program of interrupt was developed based on CCS IDE.The design of EMC in a Medium frequency power was specified in the paper, the cause of electromagnetic interrupt was analysed, common-mode interrupt was discussed as well as different-mode interrupt. some notice on make PCB and software to inhibit and reduce electromagnetic interrupt.