Halbach array permanent magnet synchronous motor with high flux weakening property

A permanent magnet synchronous motor, magnetic performance technology, applied in magnetic circuits, electromechanical devices, electrical components, etc., can solve the problems of irreversible demagnetization of permanent magnets, difficult to obtain weak magnetic effect, difficult to adapt to application occasions, etc. speed performance, avoid irreversible demagnetization failure, optimize the effect of air gap magnetic field distribution

Active Publication Date: 2017-05-24
HOHAI UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The surface-mounted permanent magnet synchronous motor has a large air gap because the permanent magnet is located on the rotor surface, and the direct axis reactance X d The smaller it is, it is difficult to obtain a better field weakening effect; on the other hand, the permanent magnet is easily affected by the armature direct axis demagnetization current and irreversible demagnetization occurs, which leads to certain limitations in the application of field weakening control in surface-mounted permanent magnet synchronous motors. Restricted, it is difficult to adapt to applications with a wide speed range

Method used

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  • Halbach array permanent magnet synchronous motor with high flux weakening property
  • Halbach array permanent magnet synchronous motor with high flux weakening property
  • Halbach array permanent magnet synchronous motor with high flux weakening property

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specific Embodiment 1

[0031] The structure of a Halbach array permanent magnet synchronous motor with high and weak magnetic properties with an inner rotor structure described in this embodiment is as follows: figure 1 As shown, it includes the outer stator core, three-phase armature winding, air gap, inner rotor core, segmented Halbach array permanent magnet poles and other parts.

[0032] In this embodiment, the number of stator slots of the motor is 12, the number of rotor pole pairs p is 2, each magnetic pole is composed of 5 permanent magnets of the same size, and the angle occupied by the salient poles of the rotor core is 10° (that is, the pole arc coefficient α Fe is 0.11), then the angle occupied by each permanent magnet is 16°, and its polar arc coefficient is 0.178.

[0033] According to the dimensions of the permanent magnets and the salient poles of the rotor core, the position angle of each permanent magnet and its corresponding magnetization angle can be calculated, as shown in Table...

specific Embodiment 2

[0038] The structure of a Halbach array permanent magnet synchronous motor with high and weak magnetic properties with an outer rotor structure described in this embodiment is as follows: Figure 4 As shown, it includes inner stator core, three-phase armature winding, air gap, outer rotor core, segmented Halbach array permanent magnet poles and other parts.

[0039]Same as Embodiment 1, in this embodiment, the number of stator slots of the motor is 12, the number of rotor pole pairs is 2, and each magnetic pole is composed of 5 permanent magnets of the same size, and the angle occupied by the salient poles of the rotor is 10° (that is, the pole arc Coefficient α Fe is 0.11), then the angle occupied by each permanent magnet is 16°, and its polar arc coefficient is 0.178.

[0040] According to the dimensions of the permanent magnets and the salient poles of the rotor core, the position angle of each permanent magnet and its corresponding magnetization angle can be calculated, a...

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Abstract

The invention discloses a Halbach array permanent magnet synchronous motor with high flux weakening property. The Halbach array permanent magnet synchronous motor structurally comprises a stator iron core, a three-phase armature winding, an air gap, a rotor iron core, a sectional Halbach array permanent magnet pole, and the like. The Halbach array permanent magnet synchronous motor has the advantages that the problem of difficulty in flux weakening in the traditional surface-mounted permanent magnet synchronous motor is solved; by additionally arranging a rotor iron core convex pole on a direct axis, the length of the air gap of the direct axis is effectively reduced, the reactance of the direct axis of the armature is increased, the flux weakening effect of the armature current is enhanced, and the irreversible demagnetizing of the permanent magnet in the demagnetizing magnetic field is avoided; the surface-mounted magnetic pole adopts the sectional Halbach array structure, so that the distribution of the air gap magnetic field is improved, the problems of overlarge torque fluctuating and the like due to the rotor convex pole are relieved, and the property of the whole motor is improved.

Description

technical field [0001] The invention relates to a Halbach array permanent magnet synchronous motor with high and weak magnetic properties, belonging to the field of permanent magnet synchronous motors. Background technique [0002] With the continuous improvement of the performance of permanent magnet materials, permanent magnet synchronous motors have been developed rapidly and have been widely used in many fields such as aerospace, medical machinery, industrial production, transportation, and national defense construction. Compared with the traditional electric excitation synchronous motor, the permanent magnet synchronous motor not only has a simpler structure, but also has no rotor excitation loss, and its efficiency is higher than that of the electric excitation synchronous motor. It is more energy-saving and environmentally friendly, and has broad development prospects. become a research hotspot. However, due to the use of permanent magnets for excitation, the excitat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/24H02K1/27
CPCH02K1/24H02K1/278
Inventor 陈浈斐马宏忠
Owner HOHAI UNIV
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