Overcurrent protection method and circuit for intelligent power module, and power utilization equipment

The invention discloses an overcurrent protection method and circuit for an intelligent power module, and power utilization equipment. The method includes the following steps: determining that a short-circuit overcurrent fault happens to the intelligent power module when a short-circuit fault is detected to happen to the intelligent power module and continues for a first preset period, and starting overcurrent protection; S2, obtaining a current bus current In of the intelligent power module when no short-circuit overcurrent fault is detected to happen to the intelligent module; S3, determining that the intelligent power module has another overcurrent fault when the current bus current In is greater than a preset threshold current Ip for a second preset period, and starting the overcurrentprotection, wherein the first preset period is shorter than the second preset period. According to the technical scheme of the invention, the method is high in reliability. 本发明公开种智能功率模块的过流保护方法、电路及用电设备，其中，智能功率模块的过流保护方法包括以下步骤：