DSP内部ADC模块在直流无刷电机控制系统中的运用

Application for the Inner ADC Module of DSP in Brushless DC Motor Control System

通过分析比较直流无刷电机控制系统中需要处理的单极性模拟信号和双极性模拟信号的特点,结合数字信号处理器(DSP)内部集成模数转换(ADC)模块引脚特点,给出了对应的外围处理电路及DSP内部软件算法。经TMS320F2812芯片试验验证处理电路满足对信号进行预处理的要求,软件算法不但提高了采样的精度,同时拓宽了ADC的处理范围,实现了双极性模拟信号相位的分辨。

This paper analyzes and compares the characteristics of unbipolar analog signal and bipolar analog signal which need to be processed in brushless DC motor control system,with the characteristics of the integrated module pins of digital signal processor（DSP）,it gives the corresponding peripheral processing circuits and algorithms of DSP internal software.After the TMS320F2812 chip＇s test verification,the processing circuit meets the requirements of the signal preprocessing,and the software algorithm not only improves the accuracy of sampling,but also broaden the ground treatment for ADC,achieved the resolution of bipolar analog signal phase.