Motor rotor device and motor

Abstract

The present application discloses a motor rotor device. The motor rotor device includes a rotor core and an adhesive element, wherein the adhesive element is fitted to the rotor core; a first sub-airgroove is disposed on the rotor core and includes a first convex tooth and a first groove; the adhesive element includes a second convex tooth and a second groove; the first convex tooth and the second convex tooth match each other; and the first groove and the second groove match each other. The structure where the adhesive element cooperates with the first sub-air groove on the rotor core can effectively absorb the centrifugal tensile force generated by the high-speed rotation of the rotor, significantly reduce the tensile stress on a rotor magnetic bridge, ensures the robustness of the rotor during high-speed rotation, and increases the speed of the motor as much as possible.

Description

technical field [0001] The present application relates to the electromechanical field, in particular to a motor rotor device and a motor. Background technique [0002] As the number of automobiles increases year by year, oil consumption and increasingly severe environmental pressures also increase rapidly, forcing the automobile production industry to follow the development path of energy conservation and environmental protection, so electric vehicles emerge as the times require. The increasingly popular electric vehicles generally use permanent magnet synchronous motors with high power density. The permanent magnet synchronous motor is actually an AC motor. Permanent magnets are installed in the rotor of the motor to generate a permanent rotor magnetic field. Enter three alternating currents with a mutual difference of 120° to generate a rotating magnetic field, and the stator magnetic field interacts with the rotor magnetic field to drive the permanent magnet motor to run....

AI Technical Summary

Problems solved by technology

[0004] Although adding air holes in the rotor will increase the content of reluctance torque, a magnetic bridge will be formed between the air holes or between the air holes and the circumferential surface of the rotor, so the centrifugal force generated by the high-speed rotation of the motor rotor will act on the magnetic bridge. The magnetic bridge on the motor is easily damaged by the tensile stress, which causes the problem of poor rotor robustness, and the maximum speed of the motor cannot reach a higher speed. This is the reason why the maximum speed of electric vehicles is much lower than that of fuel vehicles.

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