Method for optimizing four-section Halbach array list attached permanent magnet motor

Abstract

The invention discloses a method for optimizing a four-section Halbach array list attached permanent magnet motor. The magnetization angle of a first section and a second section of an N-pole permanent magnet is an included angle between the magnetization direction and the clockwise circumferential tangential direction; the magnetization angle of the third section and the fourth section of the N-pole permanent magnet is an included angle between the magnetization direction and the anticlockwise circumferential tangential direction; the magnetization angle of the first section and the second section of the S pole is an included angle between the magnetization direction and the anticlockwise circumferential tangential direction; the magnetization angle of the third section and the fourth section of the S pole is an included angle between the magnetization direction and the clockwise circumferential tangential direction; the ratio of the pole-arc coefficients of the second-section permanent magnet to the third-section permanent magnet of each pole is a certain value, and the rotor is matched with the corresponding stator to form a four-section Halbach permanent magnet motor. According to the invention, the radial air gap flux density fundamental wave amplitude of the motor can be improved, and the harmonic component of the air gap flux density is reduced, so that the output torque is improved, the torque density and the power density of the motor are improved under the condition of the same volume and permanent magnet consumption, and the electromagnetic performance is more excellent.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to an optimized four-section Halbach array surface-mounted permanent magnet motor. Background technique [0002] Permanent magnet motors have the advantages of high output efficiency, small size, and high power density, and are widely used in aerospace, national defense, transportation, new energy, and public life. The surface mount permanent magnet motor of the Halbach array can be divided into two sections, three sections, four sections up to n sections according to the number of subsections of the permanent magnet under each pole. From a theoretical point of view, the more segments of the Halbach array, the closer the radial air gap flux density of the motor is to a sine wave, and thus the better the electromagnetic performance. However, as the number of segments increases, the complexity of processing and production is increased. Considering the actual producti...

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Problems solved by technology

However, as the number of segments increases, the complexity of processing increases

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