中图分类号： TP273；TN364+.2；TB69 文献标识码： A DOI：10.16157/j.issn.0258-7998.211353 中文引用格式： 钱依凡，薛凌云，洪哲扬. 基于STM32的大功率LED阵列高精度制冷控制系统[J].电子技术应用，2021，47(9)：75-81. 英文引用格式： Qian Yifan，Xue Lingyun，Hong Zheyang. High-power LED array high-precision refrigeration control system based on STM32[J]. Application of Electronic Technique，2021，47(9)：75-81.
High-power LED array high-precision refrigeration control system based on STM32
Qian Yifan，Xue Lingyun，Hong Zheyang
School of Automation，Hangzhou Dianzi University，Hangzhou 310018，China
Abstract： The dynamics of the LED junction temperature seriously affect the changing laws of its optical characteristics. Aiming at the heat dissipation requirements of high-power LED arrays, a refrigeration control system is designed using thermoelectric cooler.Switching power supplies are prone to strong electromagnetic interference, a programmable linear power supply with fast response time and high stability is designed to drive TEC to work stably.Aiming at the problem that conventional linear PID has difficulty in achieving both rapidity and overshoot for the TEC refrigeration control system with nonlinear characteristics, this system is embedded in STM32 to realize fuzzy RBF neural network PID control, uses 6×3 W high-power LED array for testing, the experiment results proved that compared with the conventional linear PID control, the TEC refrigeration control system has shortened the adjustment time, reduced the overshoot, and the temperature fluctuation is only ±0.1 ℃. The refrigeration control system can improve the output light efficiency while maintaining the stable working environment temperature of the high-power LED array.
Key words : STM32；high-power LED array；thermoelectric cooler；fuzzy RBF neural network PID