基于DSP的高精度线性斯特林制冷机控制系统

High accuracy control system of linear Stirling cryocooler based on DSP

介绍了一种高效、高精度、高功率密度线性斯特林制冷机控制系统的设计。对斯特林制冷机控制系统的组成及工作原理、控制系统的硬件结构和软件流程以及通过双边单极性控制获得标准正弦波驱动电压的方法进行了详细阐述。驱动控制器基于TI公司的TMS320F28XX系列DSP,采用积分分离型PID控制算法进行制冷温度的闭环控制。试验结果表明,该系统的转换效率及温控精度均达到了较高的水平,其中转换效率高达90%以上,温控稳定性高达0.15 mV@10 min。

In this paper,a high accuracy control system of linear Stirling cryocooler based on the TI company’s product TMS320 F28 XX was designed and introduced.Firstly the consistence and theory of the control system were induced.And then hardware and software architecture of the system were illustrated.The sinusoidal voltage to drive the linear motors were elaborated.Integral separating PID control algorithm was employed to obtain good control effect.The system yielded a very high efficiency grade of 90%,and the temperature control stability is 0.15 mV@10 min.