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BOOSTXL-DRV8323RS: 280025C Launchpad 设置速度speedref与估算速度speed差太多

Part Number: BOOSTXL-DRV8323RS

        使用自己PM电机,参数已知,板子为280025C Launchpad 和BOOSTXL-DRV8323RS:,供电24V

运行在 BuildLevel = 3,  MOTOR1_FAST defined.设置运行速度为50HZ,观测窗口显示的速度估算反馈值很小,但是实际的速度值,通过示波器观察相电流与设置运行速度一直,是50HZ

是什么原因导致速度估算反馈值错误呢?