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High speed electric principal shaft system supported by five-freedom-degree AC magnetic bearing

A high-speed motorized spindle, high-speed spindle technology, applied in the directions of bearings, shafts and bearings, holding devices with magnetic attraction or thrust, etc., can solve the problems of high price of DC power amplifiers, limited application fields, and high cost, and achieve improved control. Accuracy and mechanical efficiency, high control accuracy, low cost effect

Inactive Publication Date: 2011-05-04
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The rotor of the traditional magnetic levitation electric spindle system is supported by 3 DC active magnetic bearings, of which 2 radial magnetic bearings, each radial magnetic bearing controls two radial directions perpendicular to each other, and the other 1 axial thrust magnetic bearing Control the axial degree of freedom; using DC control, the DC power amplifier is expensive and bulky, and a radial magnetic bearing usually requires 4 unipolar (or 2 bipolar) power amplifier circuits, which directly leads to the magnetic bearing The supported electric spindle system has large volume, high power consumption, and high cost, which greatly limits its application fields, especially in aerospace and military applications

Method used

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  • High speed electric principal shaft system supported by five-freedom-degree AC magnetic bearing
  • High speed electric principal shaft system supported by five-freedom-degree AC magnetic bearing
  • High speed electric principal shaft system supported by five-freedom-degree AC magnetic bearing

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Experimental program
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Effect test

Embodiment 1

[0036] Such as figure 1 and figure 2 As shown, the high-speed motorized spindle system supported by a five-degree-of-freedom AC magnetic bearing, the mechanical structure is mainly composed of an AC-DC three-degree-of-freedom active magnetic bearing 25 pressed into a steel cylinder inner sleeve 16, a high-speed spindle motor 26, and an AC two-degree-of-freedom active The magnetic bearing 27 and the rotating shaft 3 constitute. figure 1 Among them, the axial displacement sensor probe 2 is installed on the right end cover 1, on the axis line of the rotating shaft 3, and detects the axial displacement of the rotating shaft 3; the radial auxiliary bearing 4 is fixed in the right end cover 1; 4 radial displacements at the right end The sensor probes 61 are evenly distributed along the circumference and fixed on the right end sensor bracket 51 between the right end cover 1 and the AC / DC three-degree-of-freedom active magnetic bearing 25 to detect the radial displacement of the rig...

Embodiment 2

[0044] Such as image 3 and Figure 4 As shown, the high-speed motorized spindle system supported by a five-degree-of-freedom AC magnetic bearing, its mechanical structure is mainly composed of a high-speed spindle motor 26 press-fitted in a steel cylinder inner sleeve 16, two AC two-degree-of-freedom active magnetic bearings 27, an axial active The magnetic bearing 28 and the rotating shaft 3 constitute. image 3 Among them, the radial auxiliary bearing 4 and the radial-axial auxiliary bearing 20 are installed in the right end cover 1 and the left end cover 21 respectively; the axial displacement sensor probe 2 is installed on the right end cover 1 on the axis line of the rotating shaft 3, Detect the axial displacement of the rotating shaft 3; the axial DC active magnetic bearing 28 is installed close to the right end cover 1, the left side of which is the right end sensor bracket 51, and the four radial displacement sensor probes 61 at the right end are evenly distributed a...

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Abstract

The present invention provides a high-speed motorized spindle system of a five-DOF AC magnetic bearing support, which consists of an AC / DC three-DOF active magnetic bearing pressed in a steel cylinder, a high-speed spindle motor, an AC two-DOF active magnetic bearing, a rotating shaft, a right end cap and a left end cap. The high-speed motorized spindle is arranged on the rotating shaft; the AC / DC three-DOF active magnetic bearing and the AC two-DOF active magnetic bearing are respectively arranged on the left and right sides of the high-speed spindle motor. The two radial DOFs in the AC / DC three-DOF active magnetic bearing and the AC two-DOF active magnetic bearing both adopt a triode structure and a three-phase inverter for drive and control, thus obviously decreasing the loss and the cost of a power amplifier circuit. The high-speed motorized spindle system achieves the zero intermediate transmission between the motor and the rotating spindle and between the rotating spindle and a knife, in particular to the non-contact suspended operation between the motor and the rotating spindle, and has the advantages of no mechanical friction and wear, no noise, low power consumption, highspeed, high accuracy, etc.

Description

technical field [0001] The invention belongs to the technical field of electromechanical transmission equipment control, and belongs to the field of non-contact magnetic levitation rotating machinery, especially a high-speed electric spindle system supported by a five-degree-of-freedom AC magnetic bearing, which is suitable for five-degree-of-freedom suspension of various high-speed and high-precision rotating machinery Support, can be used in special occasions such as vacuum technology, clean room, aseptic workshop and transmission of corrosive medium or very pure medium, and has irreplaceable role in high-speed high-precision CNC machine tools, machinery manufacturing industry, life science, aerospace and other fields application value. Background technique [0002] Magnetic bearing is a high-tech electromechanical integration product that uses magnetic field force to suspend the rotor in space and realizes no mechanical contact between the rotor and the stator. The motor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K7/09F16C32/04H02N15/00
CPCF16C32/0459F16C32/0485F16C32/0489
Inventor 朱熀秋邬清海诸德宏
Owner JIANGSU UNIV
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