Description
修复检测电路，运行试机，轻载正常。但轻载输出正常，并不代表输出就正常了，脉冲丢失同样轻载正常且转速均匀有力。这时要调试软件，将励磁禁止，启动，监控0911参数，提示321dd，同时调速器跳出f517故障。根据诊断提示，确定脉冲驱动组，用示波器测输出脉冲，果然v相模块上桥无驱动脉冲。，这就好办了，可以根据故障点反向查找，最后确认主控板驱动三极管性能不良！换新，故障排除。
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