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Halbach permanent magnet synchronous servo motor

A servo motor and permanent magnet synchronous technology, which is applied to synchronous motors with stationary armatures and rotating magnets, magnetic circuit stationary parts, magnetic circuit rotating parts, etc., can solve the problem of more motor parameter restrictions and increased process manufacturing Difficulty, reduce motor efficiency and other issues, to achieve the effect of cost reduction, performance improvement, and reduction of cogging torque

Inactive Publication Date: 2013-07-03
DORNA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sine wave can also be obtained by changing the magnetic circuit of the permanent magnet, there are a series of problems such as more restrictions on the parameters of the motor, increasing the difficulty of manufacturing the process, and reducing the efficiency of the motor.

Method used

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  • Halbach permanent magnet synchronous servo motor
  • Halbach permanent magnet synchronous servo motor

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Embodiment Construction

[0013] The invention includes a stator 1, a rotor 2, a stator core 3, a stator slot 4, a rotating shaft 5, a rotor core 6 and a permanent magnet 7 of Halbach structure. The stator core is formed by stacking stator punches, the stator punches adopt an asymmetric groove structure, and the stator is provided with concentrated windings. The rotor core adopts a solid structure, and the permanent magnets forming the rotor adopt a special magnetic circuit structure, that is, a Halbach array structure. In this example, there are 4 anisotropic permanent magnets under each pole, and the number of permanent magnets can be determined according to the actual situation. The design of this magnetic circuit is better than the traditional magnetic circuit design.

[0014] In order to ensure that the motor has a good permanent magnet flux density waveform, in the anisotropic permanent magnet components, the number of anisotropic permanent magnets under each pole should be kept within a certain ...

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Abstract

The invention discloses a halbach permanent magnet synchronous servo motor which comprises a stator 1 and a rotor 2, wherein a stator iron core 3 is formed by stacking iron core punching sheets; stator slots 4 are asymmetric about central lines of the stator slots; a concentration winding is used as a stator winding; and the rotor 2 comprises a rotating shaft 5, a rotor iron core 6 and permanent magnets 7 with halbach structures and can supply a permanent magnet flux density waveform in a sine regular distribution. The permanent magnets 7 with the halbach structures can supply a permanent magnet air-gap magnetic field in the sine regular distribution, so that stator inclined slot, rotor inclined electrode and stator overlapping winding distribution is not adopted; and by the asymmetric structures of the stator slots, a tooth socket torque of the motor is effectively reduced. Furthermore, the motor with the structure is high in power density; and the size of the motor is reduced, and the manufacturing cost of the motor is reduced.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor, in particular to a Halbach permanent magnet synchronous servo motor with an asymmetrical stator slot structure. Background technique [0002] With the development of permanent magnet motors towards high efficiency, high speed, high power density, and miniaturization, traditional permanent magnet motors show certain limitations. distribution, efficiency cannot be maintained at a high level, etc. The servo motor is required to have the characteristics of low positioning torque, low torque ripple and low moment of inertia. The Halbach magnetic circuit structure can effectively reduce the frequency of speed fluctuations and improve the accuracy of the position. The present invention does not need to use distributed stator windings, stator slant slots or rotor permanent magnet slant poles like traditional motors, because this is often at the expense of reduced efficiency and increased costs. ...

Claims

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Application Information

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IPC IPC(8): H02K21/14H02K1/16H02K1/27
Inventor 吕春松雷勤李社伟段伟刘细平
Owner DORNA TECH
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