High-strength Halbach permanent magnet array rotor structure

Abstract

The invention discloses a high-strength Halbach permanent magnet array rotor structure, which belongs to the technical field of an axial flux permanent magnet motor. The structure includes a permanentmagnet fixation pin supporting inner fixing ring, a circumferentially-distributed segmental Halbach permanent magnet array, a rotor magnetic conductive back yoke sleeving a rotating shaft, and a U-shaped supporting outer fixing ring; and two side surfaces of each of permanent magnets of the Halbach permanent magnet array are provided with semi-circular grooves used for inserting pins during assembly, the magnet fixation pin supporting inner fixing ring, the rotor magnetic conductive back yoke, and the U-shaped supporting outer fixing ring are fastened and connected to form a rotor disc through threaded holes disposed respectively and axially, and two adjacent sector-shaped permanent magnet blocks are radially fixed on the rotor disc by radial pin holes formed by the semi-circular grooves.A Halbach permanent magnet array rotor disclosed by the invention has the characteristics of high permanent magnet excitation efficiency, high structural strength and good installation manufacturability, and is suitable for application occasions such as high-speed axial magnetic field permanent magnet motor drive and propulsion.

Description

technical field [0001] The invention discloses a high-strength Halbach permanent magnet array rotor structure, relates to the technical field of axial flux permanent magnet motors, and particularly relates to a high-strength Halbach permanent magnet array rotor of an axial flux motor. Background technique [0002] Axial flux permanent magnet motors, also known as disc motors, have significant advantages such as high torque density, compact axial structure, and high efficiency. They have good application prospects in electric vehicles, wind power generation, and aircraft propulsion systems. The difference from the radial motor is that the outer diameter of the rotor of the axial field motor is generally the same as that of the stator and the permanent magnet is generally a surface-mounted structure. Therefore, the moment of inertia of the axial field motor is large. In addition, the axial field permanent magnet motor, which is developing in the direction of high speed and hig...

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Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the above-mentioned background technology and provide a high-strength Halbach permanent magnet array rotor structure. The segmented Halbach permanent magnet array is fastened to the rotor disk through the radial pin holes formed after the permanent magnet blocks are installed. The connection reduces the stress of the Halbach permanent magnet array in the axial direction, improves the mechanical strength of the rotor, and solves the technical problems of poor structural strength of the rotor of the existing Halbach array disc motor and high damage rate during installation

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