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instaSPIN-MOTION lab12 运行异常

Other Parts Discussed in Thread: MOTORWARE

使用drv8301-69m kit,无感算法均运行正常。进行lab12实验时,电机不转,然后用手拨动电机,电机以5rpm左右的转速转动(无明显抖动)并发出尖锐的噪声。进行lab12b速度控制实验时,电机也是固定在低速转动并发出尖锐噪声,转速不可调。已通过手拨动电机查看qep寄存器值的方式确认编码器连线无误。电机相序交换过,结果仍然如上述异常。观察变量gMotorVars.Speed_krpm为一很小的值与低转速情况符合,变量gMotorVars_SpeedQEP_krpm为一较大值。请问出现这种状况的原因可能是哪些?