CN201848722U - Magnetic suspension feeding platform of long-stator hybrid excitation linear synchronous motor - Google Patents
Magnetic suspension feeding platform of long-stator hybrid excitation linear synchronous motor Download PDFInfo
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- CN201848722U CN201848722U CN2010206143148U CN201020614314U CN201848722U CN 201848722 U CN201848722 U CN 201848722U CN 2010206143148 U CN2010206143148 U CN 2010206143148U CN 201020614314 U CN201020614314 U CN 201020614314U CN 201848722 U CN201848722 U CN 201848722U
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Abstract
The utility model provides a magnetic suspension feeding platform of a long-stator hybrid excitation linear synchronous motor, which comprises a feeding platform, a long-stator hybrid excitation linear synchronous motor and a control system. The hybrid excitation linear synchronous motor mainly comprises a stator iron core, a permanent magnet, an exciting winding, a rotor iron core and a thrust winding. The magnetic suspension feeding platform is characterized in that: the feeding platform is arranged on the rotor iron core; the rotor iron core is internally provided with the thrust winding; the permanent magnet and the exciting winding are arranged on the stator iron core; an electric vortex flow sensor is arranged on the feeding platform; a long grating sensor is arranged on a base; the exciting winding and the electric vortex flow sensor are connected to a magnetic suspension control system; and the thrust winding and the long grating sensor are connected to a feeding control system. The feeding platform can be suspended by a normal magnetic tensile force of the hybrid excitation linear synchronous motor to eliminate friction, so as to be of great significance in further improving the machining precision of the feeding platform of a numerical control machine tool.
Description
Technical field
The utility model relates to a kind of magnetic suspension feeding platform, particularly relates to a kind of no friction of Digit Control Machine Tool, long stator composite excitation magnetic suspension feeding platform of liner synchronous motor of direct feeding of being used for, and belongs to fields of numeric control technique.
Background technology
The frictional resistance of Digit Control Machine Tool feeding platform in process, particularly the non-linear friction when low speed influences the precision of feed system inevitably, causes feed system to produce creeping and causes reverse dead band.Friction is to cause one of numerical control machine heat deformation reason, is the key factor that influences machining accuracy.Friction also is the factor that causes wearing and tearing, produces noise, needs good lubricating to improve the lathe life-span.Therefore, reduce or eliminate friction and become the technical bottleneck of condition number controlled machine feeding platform performance.
Existing Digit Control Machine Tool magnetic suspension feeding platform utilizes permanent-magnet linear motor as driving element, because air-gap field is difficult to regulate, therefore need the electromagnet of additional multi-point support to suspend, device is complicated, the ability that particularly lacks the direct self-suspending of feeding platform, when machine body designs, have to consider the suspension problem, limited using and promoting of magnetic suspension feeding platform, influence the stability and the reliability of magnetic suspension feeding platform operation.
Summary of the invention
Goal of the invention: the utility model provides a kind of long stator composite excitation magnetic suspension feeding platform of liner synchronous motor, its objective is solution Digit Control Machine Tool magnetic suspension feeding platform complex structure, stability and poor reliability in the past, particularly can't well solve the technical problem of frictional resistance.
Technical scheme: the utility model is achieved through the following technical solutions:
Long stator composite excitation magnetic suspension feeding platform of liner synchronous motor, it is characterized in that: described magnetic suspension feeding platform comprises feeding platform and long stator composite excitation linear synchronized motor and control system thereof, and long stator composite excitation linear synchronized motor comprises stator core and when using and the mover core that relatively moves of stator core; Feeding platform is installed on the mover core; In mover core, be provided with and promote the thrust winding that mover core moves with respect to stator core; In stator core, be provided with and make permanent magnet and the Exciting Windings for Transverse Differential Protection of mover core at the stator core low suspension; Feeding platform is provided with current vortex sensor; Pedestal passes feeding platform and mover core; Pedestal is provided with long grating sensor; Exciting Windings for Transverse Differential Protection and current vortex sensor are connected to magnetic suspension control system; Thrust winding and long grating sensor are connected to feed control system.
Magnetic suspension control system comprises DC PWM converter, proportional controller P and current PI adjuster; Current vortex sensor is connected to proportional controller P, and proportional controller P is connected to the current PI adjuster, and the current PI adjuster is connected to the DC PWM converter, and the DC PWM converter is connected to Exciting Windings for Transverse Differential Protection; Feed control system comprises SPWM converter, position proportional adjuster P, speed pi regulator, current PI adjuster and can produce the inverter of thrust; Long grating sensor is connected to position proportional adjuster P, position proportional adjuster P is connected to the speed pi regulator, the speed pi regulator is connected to the current PI adjuster, the current PI adjuster is connected to the SPWM converter, the SPWM converter is connected to the inverter that can produce thrust, and the inverter that can produce push current is connected with thrust winding.
Described stator core be arranged on pedestal below, also be provided with auxiliary guide rail on pedestal top.
The magnetic pole of long stator composite excitation linear synchronized motor is an excitation pole, also is the suspension magnetic pole simultaneously.
The permanent magnet of long stator composite excitation linear synchronized motor and Exciting Windings for Transverse Differential Protection are fixedly mounted in the stator core of pedestal below, and thrust winding is installed in the mover core and moves with feeding platform.
The horizontal motion of feeding platform and the magnetic suspension movement of vertical direction all are to be mixed by same director's stator that pedestal is installed below to encourage the linear synchronized motor driving.
Magnetic suspension force is mainly produced by permanent magnet, and the electric current of regulating Exciting Windings for Transverse Differential Protection can change magnetic suspension force, and the size of exciting current is decided by hoverheight.
Advantage and effect: the utility model provides a kind of long stator composite excitation magnetic suspension feeding platform of liner synchronous motor of stating, comprise feeding platform and long stator composite excitation linear synchronized motor, described long stator composite excitation linear synchronized motor mainly comprises stator core and the mover core that can do relative motion with stator core, and it is characterized in that: described feeding platform is fixedlyed connected with mover core; In described stator core, be provided with Exciting Windings for Transverse Differential Protection and permanent magnet, in described mover core, be provided with thrust winding; Described feeding platform is provided with current vortex sensor; Described stator core is provided with long grating sensor; Described Exciting Windings for Transverse Differential Protection and current vortex sensor are connected to magnetic suspension control system; Described thrust winding and long grating sensor are connected to feed control system.
In order to solve the problem of Digit Control Machine Tool feeding platform existence in the past, the present invention realizes the feeding and the magnetic suspension of feeding platform simultaneously by same director's stator composite excitation linear synchronized motor, that is to say long stator composite excitation linear synchronized motor and feeding platform are combined, feeding platform is directly installed on the mover of long stator composite excitation linear synchronized motor, the feed motion of feeding platform is to be realized by the tangential electromagnetic push of long stator composite excitation linear synchronized motor, changes electromagnetic push by the electric current of regulating thrust winding; Magnetic suspension force is the unilateral magnetic force that produces between the mover core of the magnetic field that produces of permanent magnet on the stator and exciting current and motor, regulates magnetic suspension force by regulating exciting current.The magnetic pole of long stator composite excitation linear synchronized motor is an excitation pole, also is the suspension magnetic pole simultaneously.The electromagnet magnetic suspension system that this is different from the past, this invention is to move by the magnetic suspension force that motor self produces, feeding platform has the ability of direct self-suspending, and can overcoming in the past, feeding platform electromagnet multi-point support suspends, the device complexity makes it influence operation stability and technology of dependability problem.
In addition, this utility model also comprises following technical characterictic: the thrust winding electric current of long stator composite excitation linear synchronized motor provides electromagnetic push for whole device, and adopts
Vector control mode.
The size of exciting current is finished by magnetic suspension control system, and the main circuit of system is the DC PWM converter, adopts the two closed-loop controls of hoverheight and exciting current.The hoverheight controller is a proportional controller, and preventing hoverheight overshoot, and exciting current adopts pi regulator.
The feeding process of platform is finished by feed control system, and this is the three ring control systems that a position, speed and electric current are formed.Position ring is proportional controller P, and speed and electric current adopt pi regulator.
Because the magnetic line of force is always along the path closure of magnetic resistance minimum, feeding platform directly links to each other with the mover of linear synchronized motor, and under the magnetic pull effect, platform and mover can not be equivalent to guiding electromagnet of the prior art to the side deflection.The effect of magnetic pull is far longer than electromagnetic push, therefore, is equivalent to that there are a plurality of guiding electromagnets both sides on the direction of motion of motor.
The concrete advantage of the utility model is as follows:
1, the feeding of feeding platform and magnetic suspension are finished simultaneously by same director's stator composite excitation linear synchronized motor, need not the electromagnet multi-point support and suspend, and platform structure is simple, reliability is high.
2, feeding platform mover direct and long stator composite excitation linear synchronized motor is fixedly linked, and the auxiliary guide rail of feeding platform also is the auxiliary guide rail of linear synchronized motor simultaneously.
3, compare with the feeding platform of forming by pure permanent magnet linear synchronous motor in the past, overcome the shortcoming that air-gap field is difficult to regulate.
4, with the feeding platform comparison of electric field excitation linear synchronous motor composition in the past, the advantage that existing electric field excitation linear synchronous motor can be regulated air-gap field has the energy-efficient characteristics of permanent magnet linear synchronous motor simultaneously.
5, the feeding platform of this utility model is not for there being the direct feeding of friction, and there is not frictional resistance between the guide rail, improve the precision and the response speed of feed system, eliminated and creeped and oppositely dead band, thermal deformation, wearing and tearing, noise and exempt to lubricate, improved the lathe life-span.
This utility model adopts the normal direction magnetic pull of long stator composite excitation linear synchronized motor that feeding platform is suspended to eliminate friction, make the Digit Control Machine Tool feeding platform when directly driving, can fundamentally eliminate friction and realize no friction feed, and independent motor and the electromagnet established in addition need not resembling in the past; Thoroughly whole device is simplified, and improved operating efficiency greatly, significant to the machining accuracy of further raising Digit Control Machine Tool feeding platform.
Description of drawings:
Fig. 1 is a long stator composite excitation magnetic suspension feeding platform of liner synchronous motor structural representation of the present utility model;
Fig. 2 is the structural representation of long stator composite excitation linear synchronized motor of the present utility model;
Fig. 3 is platform magnetic suspension control system and feed control system theory diagram;
Number in the figure is described as follows:
1. thrust winding, 2. mover core, 3. Exciting Windings for Transverse Differential Protection, 4. permanent magnet, 5. stator core, 6. auxiliary guide rail, 7. long grating sensor, 8. current vortex sensor, 9. feeding platform, 10. pedestal, 11. magnetic suspension control systems, 12. feed control systems.
The specific embodiment:
Below in conjunction with accompanying drawing the utility model is described further:
As shown in Figure 1, 2, a kind of long stator composite excitation magnetic suspension feeding platform of liner synchronous motor comprises feeding platform 9 and long stator composite excitation linear synchronized motor and control system thereof.Described long stator composite excitation linear synchronized motor mainly comprises stator core 5 and when using and the mover core 2 that relatively moves of stator core 5, described feeding platform 9 is installed on the mover core 2, and pedestal 10 passes feeding platform 9 and mover core 2; In described mover core 2, be provided with and promote the thrust winding 1 that mover core 2 moves with respect to stator core 5; In described stator core 5, be provided with and make permanent magnet 4 and the Exciting Windings for Transverse Differential Protection 3 of mover core 2 at stator core 5 low suspensions; Be provided with thrust winding 1 in described mover core 2, thrust winding 1 can be so that mover core 2 relatively moves with respect to stator core 5.The wiring direction of Exciting Windings for Transverse Differential Protection 3 and thrust winding 1 is vertical with the direction of motion of mover core 2.Described feeding platform 9 is provided with current vortex sensor 8; Described pedestal 10 is provided with long grating sensor 7; Described Exciting Windings for Transverse Differential Protection 3 and current vortex sensor 8 are connected to magnetic suspension control system 11; Described thrust winding 1 and long grating sensor 7 are connected to feed control system 12.
As shown in Figure 3, described magnetic suspension control system 11 comprises pwm converter, proportional controller and current PI adjuster; Described current vortex sensor 8 is connected to proportional controller P, and proportional controller is connected to the current PI adjuster, and the current PI adjuster is connected to pwm converter, and pwm converter is connected to Exciting Windings for Transverse Differential Protection 3; Exciting Windings for Transverse Differential Protection 3 links to each other with the DC PWM converter, produces magnetic field in air gap, and its size is decided by hoverheight.With given hoverheight and the current vortex sensor 8 detected feedbacks formation error signal of highly comparing, this error signal passing ratio adjuster computing obtains the specified rate of exciting current, produce the control signal of DC PWM converter through the current PI adjuster, by changing the size that duty is recently regulated exciting current, air-gap field is regulated, thereby change the size of magnetic pull, form the automatic regulating system of a hoverheight, when feeding platform 9, feeding platform 9 is in suspended state when the gross weight of mover core 2 and 9 loads of feeding platform and the equal and opposite in direction of magnetic pull, this process is finished by magnetic suspension control system 11, to guarantee that hoverheight is constant when the load disturbance.
Described feed control system 12 comprises SPWM converter, position proportional adjuster P, speed pi regulator, current PI adjuster and can produce the inverter of thrust; Described SPWM converter is exactly the sine wave pulse width modulated converter; Described long grating sensor 7 is connected to the position proportional adjuster, position proportional adjuster P is connected to the speed pi regulator, the speed pi regulator is connected to the current PI adjuster, the current PI adjuster is connected to the SPWM converter, the SPWM converter is connected to the inverter that can produce thrust, and the inverter that can produce thrust is connected with thrust winding 1.
After feeding three-phase symmetrical sine electric current in the thrust winding 1 at mover core 2, in air gap, produce travelling-magnetic-field, this travelling-magnetic-field with under the permanent magnet in the stator core 54 and the Exciting Windings for Transverse Differential Protection 3 common excitation fields that produce interact, produce electromagnetic push.
The feeding process of feeding platform 9 is finished by feed control system 12, and this is the three ring control systems that a position, speed and electric current are formed.With the amount of feeding formation position error signal of comparing with long grating sensor 7 detected feedback quantities, this error signal obtains the specified rate of feed speed by the computing of position proportional adjuster, it with relatively form the feed speed error signal by isolated feedback speed signal in the long grating sensor 7 detected position signallings, this error signal is by forming the specified rate of electric current after the computing of speed pi regulator, again with electric current the feedback quantity formation current error signal of comparing, this error signal obtains the control signal of inverter by the computing of current PI adjuster, by the thrust winding electric current is adopted
Vector control mode, the regulating action of the system that finishes.Therefore, feed control system 12 also is a positional servosystem in essence.
Described stator core 5 is arranged on pedestal 10 bottoms, also is provided with auxiliary guide rail 6 on pedestal 10 tops.When magnetic suspension feeding platform 9 is not worked, be parked on the auxiliary guide rail 6 on the pedestal 10, described mover core 2 is exactly to suspend along auxiliary guide rail 6 to move when working.
The platform feeding of this utility model and magnetic suspension are realized simultaneously by same director's stator composite excitation linear synchronized motor, feeding platform is directly installed on the mover of long stator composite excitation linear synchronized motor, the feed motion of platform is to be realized by the tangential electromagnetic push of long stator composite excitation linear synchronized motor, changes electromagnetic push by the electric current of regulating thrust winding; Magnetic suspension force is the unilateral magnetic force that forms between the mover core of common magnetic field that produces of permanent magnet on the stator and Exciting Windings for Transverse Differential Protection and motor, regulate magnetic suspension force by regulating exciting current, like this, feeding platform moves with regard to the magnetic suspension force that relies on motor self to produce, and has the ability of direct self-suspending.The magnetic pole of magnetic suspension feeding platform linear synchronized motor is an excitation pole, also is the suspension magnetic pole simultaneously.
This utility model adopts the normal direction magnetic pull of long stator composite excitation linear synchronized motor that feeding platform is suspended to eliminate friction, make feeding platform when directly driving, can fundamentally eliminate friction and realize no friction feed, and need not establish levitating electromagnet separately in addition, machining accuracy to further raising Digit Control Machine Tool feeding platform is significant, and simple for structure reasonable, relatively be beneficial to and apply at numerical control field.
Claims (7)
1. long stator composite excitation magnetic suspension feeding platform of liner synchronous motor, it is characterized in that: described magnetic suspension feeding platform comprises feeding platform (9) and long stator composite excitation linear synchronized motor and control system thereof, and long stator composite excitation linear synchronized motor comprises stator core (5) and when using and the mover core (2) that relatively moves of stator core (5); Feeding platform (9) is installed on the mover core (2); In mover core (2), be provided with and promote mover core (2) thrust winding (1) mobile with respect to stator core (5); In stator core (5), be provided with and make permanent magnet (4) and the Exciting Windings for Transverse Differential Protection (3) of mover core (2) at stator core (5) low suspension; Feeding platform (9) is provided with current vortex sensor (8); Pedestal (10) passes feeding platform (9) and mover core (2); Pedestal (10) is provided with long grating sensor (7); Exciting Windings for Transverse Differential Protection (3) and current vortex sensor (8) are connected to magnetic suspension control system (11); Thrust winding (1) and long grating sensor (7) are connected to feed control system (12).
2. long stator composite excitation magnetic suspension feeding platform of liner synchronous motor according to claim 1 is characterized in that: magnetic suspension control system (11) comprises DC PWM converter, proportional controller P and current PI adjuster; Current vortex sensor (8) is connected to proportional controller P, and proportional controller P is connected to the current PI adjuster, and the current PI adjuster is connected to the DC PWM converter, and the DC PWM converter is connected to Exciting Windings for Transverse Differential Protection (3); Feed control system (12) comprises SPWM converter, position proportional adjuster P, speed pi regulator, current PI adjuster and can produce the inverter of thrust; Long grating sensor (7) is connected to position proportional adjuster P, position proportional adjuster P is connected to the speed pi regulator, the speed pi regulator is connected to the current PI adjuster, the current PI adjuster is connected to the SPWM converter, the SPWM converter is connected to the inverter that can produce thrust, and the inverter that can produce push current is connected with thrust winding (1).
3. long stator composite excitation magnetic suspension feeding platform of liner synchronous motor according to claim 1 is characterized in that: described stator core (5) be arranged on pedestal (10) below, also be provided with auxiliary guide rail (6) on pedestal (10) top.
4. long stator composite excitation magnetic suspension feeding platform of liner synchronous motor according to claim 1 is characterized in that: the magnetic pole of long stator composite excitation linear synchronized motor is an excitation pole, also is the suspension magnetic pole simultaneously.
5. long stator composite excitation magnetic suspension feeding platform of liner synchronous motor according to claim 1, it is characterized in that: the permanent magnet (4) of long stator composite excitation linear synchronized motor and Exciting Windings for Transverse Differential Protection (3) are fixedly mounted in the stator core (5) of pedestal (10) below, and thrust winding (1) is installed in the mover core (2) and moves with feeding platform (9).
6. long stator composite excitation magnetic suspension feeding platform of liner synchronous motor according to claim 1, it is characterized in that: the horizontal motion of feeding platform (9) and the magnetic suspension movement of vertical direction all are to be mixed by same director's stator that pedestal (10) is installed below to encourage the linear synchronized motor driving.
7. long stator composite excitation magnetic suspension feeding platform of liner synchronous motor according to claim 1, it is characterized in that: magnetic suspension force is mainly produced by permanent magnet (4), the electric current of regulating Exciting Windings for Transverse Differential Protection (3) can change magnetic suspension force, and the size of exciting current is decided by hoverheight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206143148U CN201848722U (en) | 2010-11-19 | 2010-11-19 | Magnetic suspension feeding platform of long-stator hybrid excitation linear synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206143148U CN201848722U (en) | 2010-11-19 | 2010-11-19 | Magnetic suspension feeding platform of long-stator hybrid excitation linear synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201848722U true CN201848722U (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206143148U Expired - Fee Related CN201848722U (en) | 2010-11-19 | 2010-11-19 | Magnetic suspension feeding platform of long-stator hybrid excitation linear synchronous motor |
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| CN (1) | CN201848722U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001014A (en) * | 2010-11-19 | 2011-04-06 | 沈阳工业大学 | Magnetic suspension feeding platform of long stator hybrid excitation linear synchronous motor |
| CN105500032A (en) * | 2016-01-06 | 2016-04-20 | 沈阳工业大学 | Magnetic levitation motion stage provided with controllable excitation linear synchronous motors and used for vertical machining center |
-
2010
- 2010-11-19 CN CN2010206143148U patent/CN201848722U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001014A (en) * | 2010-11-19 | 2011-04-06 | 沈阳工业大学 | Magnetic suspension feeding platform of long stator hybrid excitation linear synchronous motor |
| CN102001014B (en) * | 2010-11-19 | 2014-04-09 | 沈阳工业大学 | Magnetic suspension feeding platform of long stator hybrid excitation linear synchronous motor |
| CN105500032A (en) * | 2016-01-06 | 2016-04-20 | 沈阳工业大学 | Magnetic levitation motion stage provided with controllable excitation linear synchronous motors and used for vertical machining center |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20131119 |