High-efficiency permanent magnet motor with low leakage flux flexible rotor

Abstract

The invention provides a high-efficiency permanent magnet motor with a low leakage flux flexible rotor. A chained rotor iron core structure is adopted. The rotor iron core of the magnetic circuit partis composed of two kinds of punching sheets, which can completely eliminate leakage flux circuits. The magnetic field utilization rate is improved, and thus the energy efficiency and the load capacity of the motor are significantly improved. According to the invention, inner and outer iron core structures are used; a shock absorbing material is increased in the overall transmission path; the damping of the transmission path is improved; the radial force and the torque fluctuation are weakened; in addition, a cage-shaped shock absorbing structure is designed, supplemented by the concave and convex interface design of inner and outer iron cores, so as to eliminate the radial electromagnetic force; the quality is better; and the structural strength is more reliable than the structural strength of permanent magnet motors in the prior art.

Description

technical field [0001] The invention relates to a rotor system of a permanent magnet motor, in particular to a flexible rotor system with low flux leakage and a manufacturing method thereof, and a high-efficiency permanent magnet motor with the rotor system. Background technique [0002] The permanent magnet synchronous motor has been widely used because it adopts permanent magnet excitation, no additional excitation winding for the rotor is required, the overall copper consumption of the motor is significantly reduced, and the performance advantage is obvious. With the improvement of performance requirements, the performance of surface-mounted ferrite permanent magnet motors has long been unable to meet the needs of use. Although the use of NdFeB and other materials can achieve higher performance, but due to the scarcity of NdFeB materials, high prices, and limited competitiveness, embedded ferrite magnet permanent magnet motors emerged as the times require and become the d...

AI Technical Summary

Problems solved by technology

[0005] In addition, in the existing embedded rotor, the rotor core and the rotor shaft are completely in rigid contact, and the radial electromagnetic force and torque fluctuations inside the motor are transmitted to the load with almost no loss, resulting in noise and even resonance in severe cases, resulting in damage to the load structure. Irreversible damage failure

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