各位好,我在做无刷电机的FOC驱动,使用的是F28069,但是在采样电流的过程中,ADC的的采集不是很准确,上下跳动得挺厉害得,有0.1V的误差,再根据0.02mΩ的采样电阻,7.5的放大倍数,那么一计算就有了0.6A的误差了。ADC是由PWM触发的,在下桥臂开通的情况下采样,在ADC中断中读取ADC值,也使用了一阶滤波算法,采集的数据还是跳动很厉害。请问如何可以提高ADC的精度和稳定性?另外一个问题是,FOC驱动方式,需不需要高的电流精度值?谢谢
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