Motor controller power inductor protection circuit

Abstract

The utility model belongs to the technical field of power inductor protection, and particularly relates to a motor controller power inductor protection circuit, which comprises an acquisition module, a control module and a shunt module, the control module adopts an MCU, the acquisition module adopts an NTC temperature measurement circuit, the shunt module comprises a first N-type MOS tube and a P-type MOS tube, a D pole and an S pole of the first N-type MOS tube are connected in parallel at two ends of a power filter circuit, and the P-type MOS tube is connected in parallel at two ends of the power filter circuit. When the power inductor is over-temperature, the MCU can enable the G pole of the P-type MOS tube to be converted from high level to low level, the first N-type MOS tube to be conducted, and the current introduced into the power inductor to be shunted into the first N-type MOS tube, so that the heating value of the power inductor is reduced, the shunting module is arranged for shunting, the motor controller can adopt an inductor with a smaller size, and the motor controller has the advantages that the structure is simple, the cost is low, and the reliability is high. Protection is provided under extreme conditions, and the cost is low.

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