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TMS320F28027F: 相电流波形,第一次启动正常,第二次启动不正常

Part Number: TMS320F28027F


用的是proj_lab11a工程,上电以后,gMotorVars.Flag_Run_Identify置1,相电流波形如图一正常。gMotorVars.Flag_Run_Identify置0,电机停止。然后再置1,电机启动,相电流刚启动的瞬间有一尖刺(如图2),感觉不正常,是什么原因呢?之后每次启动,都有一尖刺,只有上电第一次启动没有。帮我分析分析什么原因吧,谢谢