CN202550933U - Magnetic suspension system based on force control using quasi suspension motor and axial magnetic bearing - Google Patents
Magnetic suspension system based on force control using quasi suspension motor and axial magnetic bearing Download PDFInfo
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- CN202550933U CN202550933U CN2012202131634U CN201220213163U CN202550933U CN 202550933 U CN202550933 U CN 202550933U CN 2012202131634 U CN2012202131634 U CN 2012202131634U CN 201220213163 U CN201220213163 U CN 201220213163U CN 202550933 U CN202550933 U CN 202550933U
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Abstract
The utility model discloses a magnetic suspension system based on force control using a quasi suspension motor and an axial magnetic bearing. The magnetic suspension system based on the force control using the quasi suspension motor and the axial magnetic bearing comprises force detecting bearings, the quasi suspension motor, a rotor, the axial magnetic bearing, a voltage amplifier, a controller and a power amplifier. A force detecting bearing is respectively arranged at two ends of the rotor, the quasi suspension motor and the axial magnetic bearing are arranged between the two force detecting bearings, and the axial magnetic bearing is located on one side of the quasi suspension motor. The input end of the voltage amplifier is connected with the force detecting bearings, the output end of the voltage amplifier is connected with the input end of the controller, the output end of the controller is connected with the input end of the power amplifier, and the output end of the power amplifier is respectively connected with the quasi suspension motor and the axial magnetic bearing. According to the magnetic suspension system based on the force control using the quasi suspension motor and the axial magnetic bearing, a displacement control method is replaced by a force control method, quasi suspension of the rotor is achieved, and complexity of a circuit system is reduced. In addition, the magnetic suspension system based on the force control using the quasi suspension motor and the axial magnetic bearing is simple in structure, flexible in operation, convenient to implement, and suitable for popularization and application.
Description
Technical field
The utility model relate to a kind of adopt accurate floatation electric motor and axial magnetic bearing based on power control magnetic suspension system, belong to the magnetic levitation technology field.
Background technology
At present, in magnetic suspension control system, mainly depart from the displacement of its equilbrium position through the control rotor, realize the stable suspersion under the contactless state of rotor, this control system is referred to as the magnetic suspension system based on displacement control.Its cardinal principle is after going out rotor and depart from the displacement of reference point through sensor; Controller is transformed into control signal with detected displacement; Power amplifier converts this control signal to Control current then; Rotor turns back to original equilbrium position thereby Control current produces the magnetic force driving in carrying out electromagnet, keeps its stable suspersion invariant position.
Magnetic suspension system based on displacement control obtains application more and more widely in all kinds of high-speed rotating machines at present.It has no direct contact friction, need not lubricated and sealing and can ACTIVE CONTROL etc. advantage owing to do not have mechanical friction and wearing and tearing,, prolonged the useful life of bearing so reduced work energy consumption and noise; Kinetic equation loss is little, more is applicable to the occasion that runs up; Since do not need lubricating system, thus pollution-free, can be applicable to the vacuum ultra-clean, particular job environment such as Korrosionsmedium and extreme temperature and pressure.
Yet; Along with accurate rotor develops towards high-speed, high accuracy, automation and intelligentized direction; Tradition can not satisfy the demand of high speed and precision rotor based on the performance of the magnetic suspension system of displacement control, because have following shortcoming based on the magnetic suspension system of displacement control: the first, the magnetic suspension system essence of controlling based on displacement is time-dependent system; Must take control measure to guarantee system stability, the Control System Design difficulty is big; The second, when power down took place, falling suddenly to rotor and the very big impact of magnetic bearing generation of rotor can bring fatal harm to rotor and magnetic bearing based on the magnetic suspension system of displacement control.For fear of magnetic suspension system is damaged, supplementary protection bearing and power-down protection apparatus must be provided, system complex, cost height; The 3rd; Displacement transducer based on the magnetic suspension system of displacement control can not be directly installed on the magnetic bearing position; Thereby can not directly record the displacement at magnetic bearing place, this not only causes intercoupling between each sensor signal, reduces control precision; And it is very complicated that mechanical structure and control system also become; The 4th, be limited by the machining accuracy on rotating shaft surface and the amount of deflection of rotating shaft based on the displacement sensor precision of the magnetic suspension system of displacement control; The 5th, owing to only provide, therefore be difficult to obtain very high bearing capacity by magnetic bearing based on the bearing capacity of the magnetic bearing of the magnetic suspension system of displacement control, also be difficult to realize high rigidity; The 6th; Before the magnetic suspension rotor stable suspersion, need provide the bigger buoyancy that rises to be used for overcoming gravity based on the magnetic suspension system of displacement control, just need the bigger floating electric current that rises be provided to electromagnet; Just can make rotor reach stable levitation position, therefore control system had relatively high expectations.
Because the magnetic suspension system based on displacement control has above-mentioned shortcoming, this to a great extent limit the development of high speed and precision rotor, therefore, prior art awaits to improve and development.
The utility model content
The utility model is in order to overcome the deficiency of above technology; To the performance that exists in the existing magnetic suspension control system and the deficiency of design aspect; Aim to provide a kind of adopt accurate floatation electric motor and axial magnetic bearing based on power control magnetic suspension system, this The measuring precision is high, can guarantee control precision; Bearing capacity is strong, and rigidity is high.
The technical scheme that its technical problem of the utility model solution is taked is: that adopts accurate floatation electric motor and axial magnetic bearing controls magnetic suspension system based on power; It is characterized in that; Comprise mechanical device and control system; Said mechanical device comprises force-measuring bearing, accurate floatation electric motor, rotor and axial magnetic bearing, and said control system comprises voltage amplifier, controller and power amplifier; The two ends of said rotor are respectively arranged with force-measuring bearing, and said accurate floatation electric motor and axial magnetic bearing are arranged between two force-measuring bearings, and said axial magnetic bearing is positioned at a side of accurate floatation electric motor; The input of said voltage amplifier is connected with force-measuring bearing; Output is connected with the input of controller; The output of said controller is connected with the input of power amplifier, and the output of said power amplifier is connected with the axial magnetic bearing with accurate floatation electric motor respectively.
Said force-measuring bearing acts on radial load and axial force on the force-measuring bearing in order to measure rotor.
Said accurate floatation electric motor comprises and being nested with at epitrochanterian torque coil winding and accurate suspended coil winding that said torque coil winding produces the electromagnetic torque of realizing the rotor rotation, and said accurate suspended coil winding produces the epitrochanterian radially Electromagnetic Control power that acts on.
Said axial magnetic bearing adopts differential mode to connect, and comprises two axial stator and thrust collar, and said thrust collar is fixed on the rotor, and said two axial stator are arranged on the thrust collar both sides.
Compared with prior art, the utlity model has following beneficial effect: this system configuration is simple, flexible operation, and stable performance, design of Controller is simple; Rotor and force-measuring bearing are in accurate suspended state, and the antifriction ability can be controlled magnetic suspension bearing with displacement and match in excellence or beauty, and the antifriction resistance-reducing performance can be controlled magnetic suspension bearing with displacement and match in excellence or beauty, and have few no friction equally, advantage of low energy consumption; Directly dynamometry does not receive the influence of precision with the amount of deflection of axle of a finished surface, and certainty of measurement is high, can guarantee control precision; Only need Control current, need not bias current, power supply is simple, and cost is low; Can cancel auxiliary bearing, designs simplification, the self-protection effect when itself just has power down; Force-measuring bearing not only has the dynamometry function, but also plays the effect of the bearing of support rotor, and bearing capacity is strong, rigidity is high.
Description of drawings
Fig. 1 is the control principle block diagram of the utility model;
Fig. 2 is the structural representation of the utility model;
Among the figure: 1 force-measuring bearing, 2 accurate floatation electric motors, 3 rotors, 4 axial stator, 5 thrust collars.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to describe:
As depicted in figs. 1 and 2; A kind of adopt accurate floatation electric motor and axial magnetic bearing based on power control magnetic suspension system; Comprise mechanical device and control system; Said mechanical device comprises force-measuring bearing 1, accurate floatation electric motor 2, rotor 3 and axial magnetic bearing, and said control system comprises voltage amplifier, controller and power amplifier; The two ends of said rotor 3 are respectively arranged with force-measuring bearing 1, and said accurate floatation electric motor 1 and axial magnetic bearing are arranged between two force-measuring bearings 1, and said axial magnetic bearing is positioned at a side of accurate floatation electric motor; The input of said voltage amplifier is connected with force-measuring bearing 1; Output is connected with the input of controller; The output of said controller is connected with the input of power amplifier, and the output of said power amplifier is connected with the axial magnetic bearing with accurate floatation electric motor 2 respectively.Wherein, Said accurate floatation electric motor 2 comprises and being nested with at epitrochanterian torque coil winding and accurate suspended coil winding; Said torque coil winding produces the electromagnetic torque of realizing the rotor rotation, and said accurate suspended coil winding produces the epitrochanterian radially Electromagnetic Control power that acts on; Said axial magnetic bearing adopts differential mode to connect, and comprises two axial stator 4 and thrust collar 5, and said axial stator 4 is fixed on the rotor 3, and said two axial stator 4 are arranged on thrust collar 5 both sides.
On the one hand, said force-measuring bearing 1 is measured rotor 3 simultaneously and is acted on radial load and axial force on the force-measuring bearing 1.On the other hand, said force-measuring bearing 1 can replace the traditional protection bearing, plays the effect of the bearing of supporting rotor 3, and is connected with the voltage amplifier that force signal is converted into voltage signal.
Described accurate floatation electric motor 2 is formed arrangement for producing electromagnetic force with the axial magnetic bearing.
In order to protect rotor 3 and accurate floatation electric motor 2, said force-measuring bearing 1 is to be formed by the sliding bearing transformation of the way.
The operation principle of the utility model: that adopts accurate floatation electric motor and axial magnetic bearing controls magnetic suspension system based on power, structurally, and the cancellation auxiliary bearing; Adopt the force-measuring bearing 1 that possesses dynamometry and support functions simultaneously; On implementation method, act on the power on the force-measuring bearing 1 through balance electromagnetic force and rotor 3, realize the rotor 3 accurate purposes that suspend; Its operation principle is following: said force-measuring bearing 1 acts on the size and Orientation of power above that in order to detection rotor 3; And just detected force signal sends to voltage amplifier, and said voltage amplifier amplifies the force signal that receives and sends to controller after being transformed to voltage signal, and said controller sends to power amplifier after converting voltage signal to control signal; Said power amplifier converts control signal to the Control current signal and sends to accurate floatation electric motor 2 and axial magnetic bearing; Said accurate floatation electric motor 2 produces the rotation that electromagnetic torque is realized rotor through the torque winding on the one hand, makes its generation act on the radially magnetic control on the rotor 3 for accurate suspending windings gained Control current feedback information on the other hand, and the axial magnetic bearing produces and acts on the axial magnetic control on the rotor 3; Radially Electromagnetic Control power and the acting in conjunction of axial magnetic control are on rotor 3; Make this control act in the opposite direction, the equal and opposite in direction of power on the force-measuring bearing 1 with rotor 3 with joint efforts, thereby the power that makes rotor 3 act on the force-measuring bearing 1 approaches zero, (F representes the frictional force between rotor and the power transducer according to formula F=μ N; μ representes coefficient of friction; N representes that rotor acts on the pressure on the power transducer), obtaining frictional force between rotor 3 and the force-measuring bearing 1 is zero, obtains between rotor 3 and the force-measuring bearing 1 almost friction free effect; Keep rotor 3 and seemingly contact non-contacting state, realize that the accurate of rotor 3 suspends with bearing.
The above; Some principles of the utility model just explain through diagrams; This specification be not be to the utility model be confined to shown in described concrete structure and the scope of application; So every the modify and equivalent that might be utilized all belongs to the claim that the utility model is applied for.
Except that the said technical characterictic of specification, all the other technical characterictics are those skilled in the art's known technology.
Claims (4)
1. that adopts accurate floatation electric motor and axial magnetic bearing controls magnetic suspension system based on power; It is characterized in that; Comprise mechanical device and control system; Said mechanical device comprises force-measuring bearing, accurate floatation electric motor, rotor and axial magnetic bearing, and said control system comprises voltage amplifier, controller and power amplifier; The two ends of said rotor are respectively arranged with force-measuring bearing, and said accurate floatation electric motor and axial magnetic bearing are arranged between two force-measuring bearings, and said axial magnetic bearing is positioned at a side of accurate floatation electric motor; The input of said voltage amplifier is connected with force-measuring bearing; Output is connected with the input of controller; The output of said controller is connected with the input of power amplifier, and the output of said power amplifier is connected with the axial magnetic bearing with accurate floatation electric motor respectively.
2. accurate floatation electric motor of employing according to claim 1 and axial magnetic bearing based on power control magnetic suspension system, it is characterized in that said force-measuring bearing acts on radial load and axial force on the force-measuring bearing in order to measure rotor.
3. accurate floatation electric motor of employing according to claim 1 and axial magnetic bearing based on power control magnetic suspension system; It is characterized in that; Said accurate floatation electric motor comprises and being nested with at epitrochanterian torque coil winding and accurate suspended coil winding; Said torque coil winding produces the electromagnetic torque of realizing the rotor rotation, and said accurate suspended coil winding produces the epitrochanterian radially Electromagnetic Control power that acts on.
4. accurate floatation electric motor of employing according to claim 1 and axial magnetic bearing based on power control magnetic suspension system; It is characterized in that; Said axial magnetic bearing adopts differential mode to connect; Comprise two axial stator and thrust collar, said thrust collar is fixed on the rotor, and said two axial stator are arranged on the thrust collar both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202131634U CN202550933U (en) | 2012-05-12 | 2012-05-12 | Magnetic suspension system based on force control using quasi suspension motor and axial magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202131634U CN202550933U (en) | 2012-05-12 | 2012-05-12 | Magnetic suspension system based on force control using quasi suspension motor and axial magnetic bearing |
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|---|---|
| CN202550933U true CN202550933U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202131634U Expired - Fee Related CN202550933U (en) | 2012-05-12 | 2012-05-12 | Magnetic suspension system based on force control using quasi suspension motor and axial magnetic bearing |
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| CN (1) | CN202550933U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317837A (en) * | 2014-06-24 | 2016-02-10 | 致扬科技股份有限公司 | Magnetic suspension bearing system and control circuit thereof |
| CN110939654A (en) * | 2019-10-25 | 2020-03-31 | 珠海格力电器股份有限公司 | Magnetic suspension bearing control method and device, storage medium and magnetic suspension system |
| CN112088487A (en) * | 2018-05-08 | 2020-12-15 | 大金工业株式会社 | Motor system and turbo compressor including the same |
-
2012
- 2012-05-12 CN CN2012202131634U patent/CN202550933U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317837A (en) * | 2014-06-24 | 2016-02-10 | 致扬科技股份有限公司 | Magnetic suspension bearing system and control circuit thereof |
| CN105317837B (en) * | 2014-06-24 | 2017-10-10 | 致扬科技股份有限公司 | Magnetic suspension bearing system and its control circuit |
| CN112088487A (en) * | 2018-05-08 | 2020-12-15 | 大金工业株式会社 | Motor system and turbo compressor including the same |
| CN110939654A (en) * | 2019-10-25 | 2020-03-31 | 珠海格力电器股份有限公司 | Magnetic suspension bearing control method and device, storage medium and magnetic suspension system |
| CN110939654B (en) * | 2019-10-25 | 2020-10-09 | 珠海格力电器股份有限公司 | Magnetic suspension bearing control method and device, storage medium and magnetic suspension system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20150512 |
|
| EXPY | Termination of patent right or utility model |