The Research And Design Of A Test-Power Supply Based On SPWM Technology

The power is used to measure the electrical and machinery industry, for example, electric energy meter, mutual inductance and so on .In this paper, a new power is based on 89C51 and SA4828 is designed. The system configuration, performance feature and experimental study are introduced as well. The power uses the full digital control method, so it is simple in construction, flexible in control. This paper presents a new design method of power product.It is a hot spot of the world that the intellectualized control.It mainly uses high-speed microprocessor to dispose, restore, compare and implement a high efficiency control way .At the same time, it can enforce a rapid and effective function of protection. In my paper, the core is advanced C51 serial microprocessor in control. The fashionable method of pulse width modulation (SPWM) is applied. In order to improve equipment performance and advance efficiency, advanced digitizing pulse-width modulation chip in control-SA4828 is used to take the place of the HEF4752 which is a analogue control pulse-width modulation chip. In order to heighten the accuracy and reaction rate of the driver and defender, the high performance driven and protective chip is used. At the end, the equipment performance was picked up.During this paper, simulation model of the inverter is established by the simulation environment of MATLAB /Simulink is used to validate feasibility of the control scheme. Study of the system has carried out on the experimental platform, and given the system test waveform. It is shown by the results that the inverter power with digital control technologies designed by this dissertation can output steady voltage. It is consistent with the design goals of mechanical and electrical research institute.The equipment can carry out automatic regulation, automatic check, automatic diagnosis and automatication. So we can see that it fulfill the command of intelligent control.