A digital DC power supply for the controller design based on the STC12C5410AD is introduced. The design of single chip uses the power of digital detection and control to enhance the efficiency of linear power and adopts liquid crystal display as the user interface. The system has achieved a two-way 0 ~ 30V voltage output and one 5V constant voltage output. The structure and the basic principles of approximate numerical control DC power are proposed. Experimental results prove that the numerical control DC power has stable working, high precision on regulated voltage, small ripple wave coefficient and high efficient.%介绍PEMFC发电机的电能变换系统,探讨一种应用于该系统的5 kW高频变压器,根据已研制的PEMFC技术指标设计了相应的高频变压器参数,最后对所设计的高频变压器给出了仿真和试验测试.结果证明所设计的高频变压器能够使PEMFC发出的电特性独特的幅值相对偏低的直流电压提升到一个较高的需要值.
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