The Design Of High Power And Quick Aptitude Charger Based On DSP

With the requirement of high-power electrification apparatus(electric bicycle et al) increasing, the high-power charger is more and more important. But most of the chargers in the market are low-power, the way how to design a simple, convenient and efficient high-power charger is a research focus in the society. In this paper, we discuss how to design a intellective and speed high-power charger, it is suit for storage battery which is 24V and 100AH. The main work of this thesis is as follows:The hardware circuit design. The hardware circuit design mainly include the main circuit, the control loop circuit and the rechargeable DSP_MCU_LCD interface circuit. The design of the main circuit includes four parts. Such as the initial rectifier part of the city power, the DC DC transforming circuit, rectifier output filter circuit and the battery discharge circuit .Among them, the part of the initial rectifier circuit of the city power uses the single-phase full-bridge rectifier uncontrollable filter circuit to converse AC to DC what is used to the input of the DC_DC transform circuit, the primary role of the DC_DC transform circuit is taken as the Frequency Modulation. to make the exchange links working at a higher frequency. And through this, it can reduce the volume and weight of the transformer .This part of circuit is carried out by the Phase shifters zero-voltage switching full-bridge PWM circuit, and through the resonant inductor and the rectifier output filter circuit inductance to achieve zero voltage switching. Then designing charge control circuit includes the electricity circuit Signal Acquisition circle, the MOS driving circuit and the design of DSP-based dual-loop control algorithm. This article mainly discussed the question that how to achieve limit voltage subsection definite period and definite current pulse charging, through detecting the voltage and current, the design of the displaying and alarm circuit, can show the state of charge and prevent the occurrence of accidents. The part of the system simulation mainly establishes getting the mathematics model by main circuit and the digital controller, and adjusting the controller parameter through MATLAB. The result demonstrates that this system has a long range of the load and the double closed-loop system has a quickly attenuation in high frequency, what is more, this system reduces the noise interference.The software design. This part mainly includs the main program based on the limit voltage subsection definite period and definite current pulse charging,the realization of the PWM pulse phase shifter, the Charge-discharge pulse, and LCD display program. Under the common role of these program, the system carries out transformation in different stage of current charge, as a result, realize the quickly charging purpose.