【摘要】 数字化控制是开关电源的发展趋势。以同步整流的Buck电路为例,首先对电路进行了建模和设计,然后详细论述了数字控制中应注意的问题,并提出了定点仿真的概念,利用Matlab/Simulink进行了仿真。仿真结果表明,该数字控制Buck变换器具有良好的动态响应性能和稳态输出。最后,通过实验给予了验证。更多还原

【Abstract】 Digital control is the trend of Switching Mode Power Supply(SMPS) development.Taking Buck circuit with application of synchronous rectification for example,the design and building model of the circuit are addressed,then the problems in digital control which should be considered are proposes and the concept of fixed-point simulation is detailedly illustrated,using the Matlab/Simulink tool to simulate the circuit.The simulative results demonstrate good dynamic perfor-mance and stable output.Finally,the circuit is testified in the experiment.更多还原