基于FPGA的防脉冲干扰温控调速直流风扇研究  

Speed Regulation of DC Fan for Temperature Control Based on FPGA

作　　者：潘银松[1] 覃海洋[1] 

机构地区：[1]重庆大学,重庆400044

出　　处：《微特电机》2015年第9期97-99,共3页Small & Special Electrical Machines

摘　　要：本文设计了一种应用于风扇的智能温控调速系统,利用FPGA作为控制核心,并设计直流电源将220V交流电转化为3.3 V和24 V直流电,分别用以对FPGA和直流电机供电。智能温控调速系统设计有手动模式和自动模式,自动模式通过温度传感器DS18B20实时探测环境温度并将温度信号反馈给FPGA,FPGA通过防脉冲干扰滑动平均滤波、温度自适应100级转速调节控制算法,输出基于温度变化的PWM信号给L298N驱动芯片以调节直流电机的转速,自动模式下系统可达到100级甚至以上的电机调速效果。A temperature control system for fan was designed. The system used FPGA as the control core, and converted the 220 V AC power to 3.3 V and 24 V DC power for FPGA and DC motor. The system has manual mode and automatic mode. In automatic mode, the ambient temperature was detected real time by sensor DS18B20 and sent to FPGA. Through average filtering and temperature self-adaption control algorithm, FPGA output PWM signals based on temperature to chip L298N to regulating speed of DC motor. And the system can achieve 100 levels speed control precision.

关 键 词：FPGA DS18B20 L298N 直流电机控制 温控风扇 

分 类 号：TM33[电气工程—电机]