Rotor assembly and axial magnetic field motor

Abstract

The invention discloses a rotor assembly and an axial magnetic field motor. The rotor assembly comprises magnetic back iron, a rotor iron core, a high-strength hoop and magnetic steel, wherein the high-strength hoop is located on the periphery of the rotor iron core, the rotor iron core is arranged on the magnetic back iron, the end face of the rotor iron core is provided with a first groove extending along the radial direction of the rotor iron core, a second groove extending in the radial direction of the magnetic back iron is formed in the end face of the magnetic back iron, the first groove and the second groove are in butt joint to form a magnetic steel groove, the magnetic steel is embedded into the magnetic steel groove, P groups of the magnetic steel grooves are arranged, the magnetizing direction of the magnetic steel in each group of the magnetic steel grooves is the tangential direction of the rotor iron core, the magnetizing direction is perpendicular to the air gap direction, and the magnetizing directions of the magnetic steels in two adjacent groups of magnetic steel grooves are opposite. According to the invention, the magnetic steel is embedded into the magnetic steel groove on the circumferential surface of the rotor iron core, the magnetic steel is positioned in the axial direction, and the high-strength hoop is arranged on the circumferential surface to position the magnetic steel in the radial direction; and compared with the prior art, the rotor assembly of the invention has the advantage that the reliability is remarkably improved.

Description

technical field [0001] The present invention relates to the technical field of motors, more specifically, to a rotor assembly and an axial field motor. Background technique [0002] Radial field motors and axial field motors (also called disc motors) are two technical branches in the field of motors. At present, most of the motors on the market are radial field motors. With the breakthrough of new materials and new processes, disc motors began to rise slowly. Due to higher iron core utilization, greater power density and higher torque density, disc motors are especially suitable for occasions with strict requirements on motor volume and weight. [0003] see figure 1 , figure 1 Schematic diagram of the exploded structure of the rotor assembly provided for the prior art. [0004] The rotor assembly includes: the rotor assembly is composed of a rotor back plate 100', a magnetic steel 200' and a surface iron core 300'. In this solution, the surface iron core 300' is bonded ...

AI Technical Summary

Problems solved by technology

The mechanical reliability of the rotor with this structure is poor

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