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DSP下电过程中会不会因为程序跑飞导致MOS管被高压击穿

我用28035电机控制器转动PMSM,当电机还没停止的时候,断掉DSP的供电电源,功率版的电源没有断掉。但执行这种操作后,MOS管因为电压过高被击穿了。

是不是DSP的供电电源下电过程中程序跑飞导致MOS管被高压击穿呢?