High and weak magnetic performance halbach array permanent magnet synchronous motor

A technology for permanent magnet synchronous motors and magnetic properties, applied in the direction of magnetic circuits, electromechanical devices, electrical components, etc., can solve the problems of difficulty in obtaining weak magnetic effects, irreversible demagnetization of permanent magnets, and difficulty in adapting to applications, etc., to achieve improved weak magnetic expansion Speed ​​performance, avoid irreversible demagnetization failure, optimize the effect of air gap magnetic field distribution

Active Publication Date: 2019-04-16
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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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  • High and weak magnetic performance halbach array permanent magnet synchronous motor
  • High and weak magnetic performance halbach array permanent magnet synchronous motor
  • High and weak magnetic performance halbach array permanent magnet synchronous motor

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specific Embodiment 1

[0030] The structure of the Halbach array permanent magnet synchronous motor with inner rotor structure and high field weakening performance described in this embodiment is as follows figure 1 As shown, it includes an outer stator core, a three-phase armature winding, an air gap, an inner rotor core, and segmented Halbach array permanent magnet poles.

[0031] In this embodiment, the number of stator slots of the motor is 12, the number of rotor pole pairs p is 2, and each pole is composed of 5 permanent magnets of the same size. The salient poles of the rotor core occupy an angle of 10° (that is, the pole arc coefficient α Fe Is 0.11), the angle occupied by each permanent magnet is 16°, and its pole arc coefficient is 0.178.

[0032] According to the size of the permanent magnet and the salient pole of the rotor core, the position angle of each permanent magnet and its corresponding magnetization angle can be calculated, as shown in Table 1.

[0033] Table 1 Permanent magnet positi...

specific Embodiment 2

[0036] The structure of the Halbach array permanent magnet synchronous motor with an outer rotor structure and high field weakening performance described in this embodiment is as Figure 4 As shown, it includes an inner stator core, a three-phase armature winding, an air gap, an outer rotor core, and segmented Halbach array permanent magnet poles.

[0037] Same as the first embodiment, the number of stator slots of the motor in this embodiment is 12, the number of rotor pole pairs is 2, and each pole is composed of 5 permanent magnets of the same size. The salient poles of the rotor occupy an angle of 10° (that is, the pole arc Coefficient α Fe Is 0.11), the angle occupied by each permanent magnet is 16°, and its pole arc coefficient is 0.178.

[0038] According to the size of the permanent magnet and the salient pole of the rotor core, the position angle of each permanent magnet and its corresponding magnetization angle can be calculated, as shown in Table 2.

[0039] Table 2 Perma...

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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 field weakening performance, 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 developed rapidly and have been widely used in many fields such as aerospace, medical machinery, industrial production, transportation, and national defense construction. Compared with traditional electrically-excited synchronous motors, permanent magnet synchronous motors have a simpler structure due to the use of permanent magnets for excitation, no rotor excitation loss, higher efficiency than electrically-excited synchronous motors, more energy-saving and environmental protection, and broad development prospects. Become a hot spot of research. However, due to the use of permanent magnet excitation, it is difficult to adjust the...

Claims

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Application Information

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