Halbach permanent magnet array of convex magnetic block

Abstract

The invention discloses a Halbach permanent magnet array of a convex magnetic block. The permanent magnet array is characterized in that the magnetism line distribution is closer to the sinusoidal distribution on the basis of keeping the basic characteristics of the Halbach permanent magnet array; meanwhile, the strength of a magnetic field is improved; the general Halbach permanent array is of a magnetic array structure which arranges and integrally combines the magnetic blocks with rectangular cross sections along the radial magnetizing direction and tangential magnetizing direction, and therefore, the strength of the magnetic field at one side of the permanent magnet array is highly increased and while the strength of the magnetic field at the other side is highly reduced; a large deviation occurs between the magnetic field distribution and sinusoidal distribution, so that the general Halbach magnetic field characteristics cannot meet the high-precision requirement of precise positioning and other application places. The Halbach magnet array of the magnetic block with the convex cross section is characterized in that each magnetic block is equipped with the convex sections and is arranged by the Halbach array mode; therefore, the sinusoidal distribution characteristic of the magnetic field is improved under the same size and rest magnetic induction intensity; moreover, the magnetic field strength is improved to some extent. The Halbach permanent magnet array of the convex magnetic block is mainly applied to the permanent array of a linear permanent magnet motor and a rotary permanent magnet motor.

Description

technical field [0001] The invention relates to the field of permanent magnet motors, including the structural design and manufacture of linear permanent magnet motors. Background technique [0002] In 1979, when American scholar Klaus Halbach was doing electron acceleration experiments, he discovered a special arrangement of permanent magnet arrays, called the Halbach permanent magnet array. In the Halbach permanent magnet array, due to the mutual superposition and cancellation of the tangential magnetic field and the radial magnetic field, the magnetic field strength on one side of the permanent magnetic array is greatly increased, while the magnetic field strength on the other side is greatly weakened. Under the condition of keeping the volume of the permanent magnet block constant, the air gap density of the motor can be increased by using the Halbach array. [0003] At present, the applications of Halbach permanent magnet arrays are mainly directly applied in high-ener...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the magnetic field generated by the existing Halbach permanent magnet array has a large gap with the perfect sinusoidal magnetic field, and propose a Halbach permanent magnet array with a convex cross-section magnetic block, which replaces the common Halbach permanent magnet array and uses rectangular cross-section magnetic block

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