An electric motor maximum torque-to-current ratio controller is provided

The utility model relates to the technical field of circuit control. The utility model discloses a controller, in particular to a maximum torque-current ratio controller of a motor. The structure comprises a shell, a bottom cover, a chip board, a water-cooled tube and a fastening bolt, the bottom of the shell is fixedly installed on a flat-plate-shaped bottom cover. The chip board is fixedly arranged in the shell; a water-cooled tube is tightly attached to the bottom of the chip board, the upper space of the chip board is an assembly part, the lower space of the chip board is a heat dissipation part, the outer side walls of the four sides of the shell corresponding to the assembly part are concave inwards to form rain shielding grooves, the bottom end faces of the rain shielding grooves are breathable plates, the breathable plates are obliquely arranged, and the bottoms of the breathable plates are flush with the middles of the side walls; by arranging the rain shielding groove and theventilation plate, water