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TMS320F28027F: fast 速度估算不准确

Part Number: TMS320F28027F


我要同一个驱动器 拖电机1 时  速度估算准确,   拖电机2时  实际转速是 目标转速的0.85.  我只好用 fast 估算的角度 计算 速度 ,才使速度环正确。      电机1 和电机2 转速一样,功率相差一倍。      fast速度不准和什么有关系?