Permanent magnet motor

Abstract

The invention relates to the field of permanent magnet motors and discloses a permanent magnet motor. The permanent magnet motor comprises a shell, a stator core and a rotor core, wherein the stator iron core is circumferentially arranged along the inner wall of the casing, and the rotor iron core is installed in a space enclosed by the stator iron core; the rotor iron core comprises at least two full-bridge type lamination groups and at least one half-bridge type lamination group, and the laminations in the full-bridge type lamination groups comprise a plurality of full-bridge punching sheets which are connected with the first central connection bridges and are distributed along the circumferential direction; the laminations in the half-bridge type lamination groups comprise at least one separation punching sheet which is disconnected from a second central connection bridge and is distributed along the circumferential direction, and the full-bridge type lamination groups and the half-bridge type lamination groups are laminated along the axial direction, so each half-bridge type lamination group is positioned between two full-bridge type lamination groups; therefore, the adjacent sectors of the rotor core are asymmetric. The power density of the motor can be improved.

Description

[0001] This application is a divisional application with the filing date of "2018.11.30", the application number of "201811459899.8", and the application title of "A High Power Density Permanent Magnet Motor". technical field [0002] The invention relates to the field of permanent magnet motors, in particular to a permanent magnet motor. Background technique [0003] Traditional brushless DC motors use surface-mounted magnetic tiles or built-in radially magnetized magnet steel structures, which have low power density and are limited by cost factors. The magnetic flux per pole of the motor is increased by tangentially magnetized parallel magnetic circuit structures. The existing tangential magnetization structure still has the problem of large flux leakage, which limits the performance improvement of the motor. [0004] Patent CN201611226568.0 designs a rotor core, which has at least one tooth sector disconnected from the rotor collar, and at least one tooth sector connected...

AI Technical Summary

Problems solved by technology

However, the above-mentioned patents only rely on parameters such as stator slot width, tooth width, and yoke width to average the flux density, and fail to consider the influence of the stator shape and structure on the motor magnetic field and loss, etc., and are not suitable for high power density motor structures. , also in order to reduce the vibration and noise of the motor through the combination method between the stator core and the casing, no structure that can comprehensively consider the power density and suppress vibration and noise

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