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无感算法电机在300RPM附近扭矩小,导致启动时在该转速附近震荡



电机空载启动流畅,带载后电机在目标转速低于250rpm启动也流畅,目标转速600rpm启动时,电机在经过300rpm时会震荡,然后又加速稳定到目标值。跑电流环发现在300rpm时,Iq增大到40A之后震荡严重,电机运行也不稳定,请问这可能会是什么原因导致的?