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Super-high-speed high-power magnetic-suspension main-shaft motor

A spindle motor, high-power technology, applied in the direction of bearings, electromechanical devices, electrical components, etc., can solve the problems of complex structure, occupying axial space, limiting the miniaturization critical speed and output power of high-speed spindle motors, and achieving simple and compact structure , bearing capacity and rigidity increase, and the effect of facilitating modularization and machining

Inactive Publication Date: 2008-08-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional magnetic bearing system for spindle motors uses two radial electromagnetic bearings and one axial electromagnetic bearing to control the five degrees of freedom of the spindle, which occupies considerable axial space and has a complex structure, which limits the miniaturization and optimization of high-speed spindle motors. Further improvement of its critical speed and output power

Method used

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  • Super-high-speed high-power magnetic-suspension main-shaft motor

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Embodiment Construction

[0013] like figure 1 As shown, the ultra-high-speed and high-power magnetic levitation spindle motor of this embodiment includes a casing 19, a spindle 3, a bearingless alternating pole permanent magnet motor 22, a three-degree-of-freedom permanent magnet bias hybrid magnetic bearing 23 and auxiliary bearings 2, 11. The three-degree-of-freedom permanent magnet bias hybrid magnetic bearing 23 is installed on the main shaft 3 between the bearingless alternating pole permanent magnet motor 22 and the casing 19, and the auxiliary bearing 2 is installed on the side of the bearingless alternating pole permanent magnet motor 22 At the center position of the end cover, the auxiliary bearing 11 is installed at the center position of the end cover on one side of the three-degree-of-freedom permanent magnet bias hybrid magnetic bearing 23, wherein a stator slot 16 of the bearingless alternating pole permanent magnet motor 22 is respectively embedded in a A set of three-phase torque windi...

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Abstract

This invention discloses a super-large power magnetic suspension main shaft motor including a shell, a main shaft, a set of no-bearing alternative pole permanent magnetic motor, a three free degree magnet offset mixed bearing and two assistant bearings, in which, the mixed magnetic bearing is installed on a shaft between the no-bearing alternative pole magnetic motor and the shell, an assistant bearing is installed on the center of a cover at one side of the no-bearing alternative pole motor, the other is mounted at the center of a cover at one side of the three free degree bearing.

Description

1. Technical field [0001] The invention relates to a magnetic levitation spindle motor, in particular to an ultra-high-speed and high-power magnetic levitation spindle motor. 2. Background technology [0002] Since the 1990s, high-efficiency, high-precision ultra-high-speed processing technology has been developed rapidly, and has been widely used in various industrial sectors, especially aerospace, automobile and motorcycle industries, mold processing, textile and chemical machinery. High-speed and ultra-high-speed cutting not only require a high rotational speed of the machine tool spindle, but also require large torque and power to be transmitted, and maintain good dynamic and thermal characteristics during high-speed operation. Under ultra-high-speed conditions, bearings are the key to high-speed and precision motorized spindles. At present, silicon nitride ceramic bearings cannot meet high speed and large bearing capacity due to insufficient bearing capacity and dynami...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K7/09H02K3/12H02K1/27H02K9/19H02K11/00H02N15/00F16C32/04G01B7/00H02K11/21
Inventor 邓智泉仇志坚王晓琳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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