针对当前市面上数控电源电路复杂、成本较高、同一数控电源系统不能兼并恒压恒流的情况,研究了3种数控电源常见的设计方案,并深入探究了基于DC/DC开关稳压器的数控电源设计方案.与市面上的数控电源相比,本设计是基于DC/DC开关稳压器的数控电源,通过STM32控制数字电位器来改变DC/DC开关稳压器反馈量来实现.电路采用两个反馈回路,电压反馈回路和电流采样、放大反馈回路,可以根据用户的选择实现,恒压和恒流模式之间自动切换.根据实验数据表明,基于该方法设计的数控电源恒压、恒流精度高,且电路工作稳定,价格低廉.%In this paper, the current market digitally controlled power circuit complexity, high cost, the same can not be digitally controlled power systems merger constant-voltage/ constant-current case study three common design digitally controlled power, and in-depth study of the DC/DC switching regulator numerical control power supply design.Compared with the numerical control market power, the design is based on the DC/DC switching regulator numerical control power, STM32 controlled by the digital potentiometer to change the DC / DC switching regulator feedback to achieve. Circuit uses two feedback loops, voltage and current sampling feedback loop, the feedback loop amplification can be achieved according to the user's selection, automatic switching between constant voltage and constant current modes. According to the experimental data show that the method based on the design of digitally controlled power constant voltage, constant current, high precision, and the circuit is stable, low prices.
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