Three degrees of freedom bearingless alternating pole permanent magnet motor control system with axial active suspension

A permanent magnet motor and control system technology, applied in the field of physical engineering, can solve problems such as high control and complex air gap magnetic field, and achieve the effects of simple control method, small levitation current and reduced power consumption

Inactive Publication Date: 2014-10-15
SHANGHAI UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the three-degree-of-freedom bearingless alternating pole permanent magnet motor with axial active suspension has one more set of axial suspension control windings than the traditional two-degree-of-freedom bearingless alternating pole permanent magnet motor, the air gap of the motor shares the permanent magnet magnetic field, The four magnetic fields of the electromagnetic torque winding magnetic field, the radial suspension force winding magnetic field and the axial suspension force winding magnetic field are superimposed on each other, which makes the air gap magnetic field of this new type of motor more complicated. When controlling it, three sets of windings need to be controlled at the same time , and at the same time ensure sufficient control accuracy, so the requirements for control are relatively high

Method used

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  • Three degrees of freedom bearingless alternating pole permanent magnet motor control system with axial active suspension
  • Three degrees of freedom bearingless alternating pole permanent magnet motor control system with axial active suspension
  • Three degrees of freedom bearingless alternating pole permanent magnet motor control system with axial active suspension

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] see figure 1 , the present axial active levitation three-degree-of-freedom bearingless alternating pole permanent magnet motor control system includes a controlled axial active levitation three-degree-of-freedom bearingless alternating pole permanent magnet motor (25), characterized in that: a radial The three-degree-of-freedom bearingless alternating pole permanent magnet motor with axial active suspension is connected to the suspension force control subsystem (35), an axial suspension force control subsystem (37) and an electromagnetic torque control subsystem (36) (25), wherein the radial suspension force control subsystem (35) includes a first DSP controller (20), a first optocoupler isolation (21), a first IPM intelligent power module (22), A first displacement sensor (23) and a first current sensor (24), the axially actively suspended three-degree-of-freedom bearingless alternating pole permanent magnet motor (25) passes through the first displacement sensor (23) ...

Embodiment 2

[0025] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0026]The axial suspension force control subsystem (37) includes a switching power amplifier (32), a second displacement sensor (33), a third current sensor (34) and a third DSP controller (31), the The three-degree-of-freedom bearingless alternating pole permanent magnet motor (25) and the third DSP controller (31) are connected to the switching power amplifier (32), the second displacement sensor (33) and the third current sensor (34) respectively in the axial active levitation ; The second displacement sensor (33) detects the rotor axial displacement offset through position negative feedback, uses the third DSP controller (31) to calculate and process to obtain the required control signal, and switches the power amplifier (32) to This control signal is converted into an axial suspension control current, which changes the magnetic field distribution in the left and right ...

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Abstract

The invention relates to a control system for a three-freedom-degree bearingless alternative pole permanent magnet motor in axially active suspension. Aiming at the three-freedom-degree bearingless alternative pole permanent magnet motor in axially active suspension, the invention provides a control scheme implemented by a radial suspension power control subsystem, an axial suspension power control subsystem and a electromagnetic torque control subsystem, so that the control of the electromagnetic torque, the radial suspension power and the axial suspension power of the three-freedom-degree bearingless alternative pole permanent magnet motor in axially active suspension can be realized. The novel motor and a control method of the motor can be used for various special power transmission fields such as high-speed and ultrahigh-speed main shaft motors, aerospace, life science, chemical industry, semiconductor industry and the like, and can be especially used for the occasions of vacuum technology, ultra-cleaning fields and the like without mechanical contact, friction, abrasion, lubrication and sealing.

Description

technical field [0001] The invention relates to an axial active suspension three-degree-of-freedom bearingless alternating pole permanent magnet motor control system in the technical field of electric drive control equipment, which is suitable for high-speed and ultra-high-speed spindle motors, aerospace, life sciences, chemical industry, and semiconductor industries And many other special power transmission fields, especially the occasions that require no mechanical contact, no friction and wear, no lubrication and sealing vacuum technology, ultra-clean fields and other occasions. Background technique [0002] The bearingless technology of the high-speed motor integrates the motor torque output and the rotor electromagnetic suspension support function, which not only inherits the non-contact, no lubrication, no wear, no mechanical noise, high speed, high precision and long life of the magnetic bearing support motor And other excellent characteristics, and has the advant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P27/12H02N15/00
CPCY02P20/10
Inventor 许伟跃戚振亚仇志坚
Owner SHANGHAI UNIV
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