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TMS28027 转速问题

用TSM320F28027F,  instaspin_foc        

gMotorVars.SpeedRef_krpm 设置到大于3000转 任何值; 但是电机反馈的速度只能到2800转。输入电压为250V;

这样的话导致电机转速上不了,电机的功率达不到。

问题。电机的转速与那些参数有关;如何提高电机转速