基于DSP的数字电子负载控制器设计

Design of Digital E-Load Controller Based on DSP

为改善传统的电子负载的可靠性和适应性差的问题,设计了一种基于DSP的高速数字控制器。该控制器利用数字PID控制的优点,以定点32位DSPTMS320LF2812为控制环的数字电子负载,具有根据设定值快速调整负载电压和电流的特点,较好地满足了测试系统快速性和稳定性的要求,不仅精度有了一定的提高,而且提高了电子负载控制系统的稳态和动态特性。试验结果表明,采用DSP作为控制器的数字电子负载,更适合于对控制性能要求较高的电源测试场合,具有广阔的应用前景。

To improve poor reliability and adaptability of the traditional electronic load, design a DSP- based high- speed digital controller. Using the advantages of digital PID control, the digital electronic load based on 32 - bit fixed - point DSP TMS320LF2812, has the characteristics of rapid adjustment in accordance with the load voltage and current according to settings. Better meet the test system speed and stability of the requirements ,not only have some improvement in accuracy, but also improve the system steady-state and dynamic characteristics. Test results show that the use of DSP as a controller of the digital electronic load, in the occasions with higher demand of control capability,which has a potential value for application.