CN102291060A - Normal-conducting rotating magnetic field electric type magnetic levitation system - Google Patents
Normal-conducting rotating magnetic field electric type magnetic levitation system Download PDFInfo
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- CN102291060A CN102291060A CN2011102418085A CN201110241808A CN102291060A CN 102291060 A CN102291060 A CN 102291060A CN 2011102418085 A CN2011102418085 A CN 2011102418085A CN 201110241808 A CN201110241808 A CN 201110241808A CN 102291060 A CN102291060 A CN 102291060A
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Abstract
The invention provides a normal-conducting rotating magnetic field electric type magnetic levitation system which mainly comprises two parts, namely a primary pole consisting of an annular iron core with a radial opening groove and a copper coil winding and a secondary pole made of a smooth flat aluminum or copper conductor board, wherein the copper coil winding is symmetrically arranged along the circumferential direction of the iron core; a winding manner can be a winding manner of a normal asynchronous motor; an alternating current with a certain frequency is conducted into the coil winding; a rotating magnetic field is generated in an air space; the rotating magnetic field is inducted in a secondary conductor to generate an eddy current; the polarity of the eddy current magnetic field is reverse to that of a rotating magnetic field generated by a primary current; and the eddy current magnetic field and the rotating magnetic field generated by the primary current coact to generate a levitating force. The system has a stable structure and simplicity in control, does not have a mechanical rotating mechanism, has no mechanical vibration, noises and gyroscopic effect, and is suitable for a large air space levitating occasion and can be used for realizing naturally-stable static stable magnetic levitation.
Description
Technical field
The present invention relates to the electrodynamic levitation system, particularly a kind of rotating magnetic field electrodynamic levitation system that often leads.
Background technology
According to Lenz's theorem, the magnetic field of motion and the magnetic field of variation can both induce electric current in conductor, and the magnetic direction that induced current produces is opposite with source movement magnetic field, and the interaction force in two magnetic fields shows as repulsion.According to this principle, the various countries scholar has proposed the multiple repulsion that utilizes the electromagnetic field of eddy current in the conductor to produce and has realized maglev scheme, is called electrodynamic levitation.
Wherein more representative is Japanese MLU super-conductive magnetic suspension traffic and transportation system, vehicle-mounted superconducting magnet produces moving magnetic field with the train rapid movement, in " 8 " word line circle that two siding tracks are installed, induce eddy current, the recuperability that produces repulsion character realizes electrodynamic levitation, this magnetic suspension scheme can produce stronger suspending power, use comparatively maturation, but this suspension scheme can't produce suspending power in the situation of train steady, can only be applied to the high-speed motion situation.
For realizing the electrodynamic levitation under the quiescent conditions, the nineties in 20th century, professor Teng Jing of Kyushu University proposed vertical permanent magnetism magnet-wheel, with Nd-Fe-Bo permanent magnet material at the rotor that is installed on along horizontal circumference on the disc iron yoke as permanent magnet disc motor, in stator winding, feed alternating current, drive p-m rotor and do horizontal circular motion, rotor back side magnetic flux produces the magnetic field of circular motion in air gap, in the aluminium conductor tablet, induce eddy current, eddy current magnetism and the acting in conjunction of permanent magnet rotating magnetic field produce suspending power, realize electrodynamic levitation.The relative vehicle movement in this magnetic field can produce the electrodynamic type suspending power when stationary vehicle.
Though this kind mode has realized the electrodynamic levitation of inherently stable under the quiescent conditions, but Movement in Magnetic Field if desired, then must additional complex mechanical construction drive the motion that permanent magnet rotates realization magnetic field, make total heavy, bring huge mechanical oscillation and machinery noise.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the invention provides a kind of rotating magnetic field electrodynamic levitation system that often leads, this system can realize the electrodynamic levitation of static inherently stable under the condition that does not have any mechanical movement.
Technical scheme of the present invention is: a kind of rotating magnetic field electrodynamic levitation system that often leads, comprise elementary unshakable in one's determination 3, that AC Windings 2 is formed is elementary, and smooth strap plate secondary 1, described elementary unshakable in one's determination 3 be radially the fluting ring-type, described AC Windings 2 is placed in elementary 3 grooves unshakable in one's determination.The secondary 1 horizontal direction width of smooth strap plate should make elementary unshakable in one's determination 3 all to be positioned at directly over the smooth strap plate secondary 1 more than or equal to elementary 3 width unshakable in one's determination.
Described elementary unshakable in one's determination 3 for the silicon strip coiling forms, and described AC Windings 2 is a copper core winding, and described smooth strap plate secondary 1 is the aluminium conductor plate.
Vertical range between the primary and secondary require near or greater than 1cm.
Described elementary AC Windings 2 can feed symmetrical three-phase or heterogeneous alternating current, and the winding configuration design should be according to the corresponding distribution of the primary current number of phases.
Described elementary unshakable in one's determination 3 are radially opening 24 grooves along the circumference symmetry; Symmetry is placed the three-phase alternating current winding in elementary unshakable in one's determination 3; AC Windings 2 adopts 4 utmost point chain structures; The three-phase current symmetry that AC Windings 2 feeds, 120 ° of phase phasic differences.
The number of pole-pairs of the elementary winding of the present invention should be the least possible.Amplitude by changing primary current and frequency can the output of change system suspending power.The amplitude that improves primary current can make suspending power be a square proportional relation and increase sharply.Can be according to elementary Winding Design, selection can be exported the low-limit frequency of higher suspending power as the system works frequency.
The present invention compared with prior art has the following advantages: adopt the magnetic suspension of electrodynamic type repulsion, suspending power reduces and increases with the increase of input current and gas length, belongs to intrinsic systems stabilisation, does not need complicated control system also can keep suspended state; Magnetic field is elementary relatively to move in a circle, and also can produce suspending power under elementary static situation, does not need physical support when static; There is not mechanical rotation mechanism, can avoids mechanical loss, mechanical oscillation and gyroscope effect; Can be by the size of change primary current and the amplitude and the rotating speed of frequency shift rotating magnetic field, suspending power control is more convenient effectively.
Description of drawings
Fig. 1 is the preferred a kind of rotating magnetic field electrodynamic levitation of a present invention system vertical view structure chart,
Fig. 2 is the preferred a kind of rotating magnetic field electrodynamic levitation of a present invention system left view structure chart,
Fig. 3 is the Distribution of Magnetic Field figure of rotating magnetic field electrodynamic levitation system embodiment of the present invention.
Fig. 4 is the left view of the secondary aluminium sheet 1 multi-layer stacks structure of rotating magnetic field electrodynamic levitation system embodiment of the present invention.
Among the figure: 1 is that smooth strap plate is secondary; 2 is AC Windings; 3 is elementary iron core.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Rotating magnetic field electrodynamic levitation system need feed heterogeneous symmetrical current and produce rotating magnetic field in elementary winding.In actual applications, because line voltage all is a three-phase, so elementary symmetry three phase windings that should adopt feeding three symmetrical alternating currents.Also can utilize Semiconductor Converting Technology to produce two symmetrical alternating currents and send into this suspension system, in elementary employing two-phase design of Windings.
Fig. 1, Fig. 2 show the structure chart of preferred a kind of rotating magnetic field electrodynamic levitation system embodiment.Elementary fluting unshakable in one's determination also is placed with three-phase copper winding AC coil; Secondary is smooth flat aluminium conductor plate.
Wherein, elementary iron core is radially being opened 24 grooves along the circumference symmetry; Symmetry is placed three-phase current-carrying winding in elementary iron core; Winding adopts 4 utmost point chain structures; The three-phase current symmetry that winding feeds, 120 ° of phase phasic differences, phase sequence does not limit.
As shown in Figure 3, the Distribution of Magnetic Field figure of preferred rotating magnetic field electrodynamic levitation system embodiment.
The magnetic flux distribution that has shown different secondary upper surfaces of the moment, explanation along with the alternating current amplitude that feeds in elementary each winding over time, the magnetic flux that each winding coil produces also changes thereupon, and then the distribution of magnetic flux changes in time on primary and secondary circumference and rotates with certain speed.According to the Electrical Motor principle, the synchronous speed of rotating magnetic field is: n
s=60f/p, wherein f is the primary current frequency, p is elementary number of pole-pairs.Simultaneously,
Wherein τ is a pole span, and the linear velocity of Movement in Magnetic Field is directly proportional with pole span.
Wherein, feeding the number of phases of electric current in the elementary winding minimum be two-phase, otherwise the magnetic field that can't produce circular motion, the ability of system's generation suspending power will be restricted.The input current number of phases not simultaneously, elementary winding configuration and fluting should corresponding changes.
Fig. 4 shows the secondary structure figure of preferred a kind of rotating magnetic field electrodynamic levitation system embodiment, and the lift height of secondary aluminium sheet 1 for signal, is not actual (real) thickness size or ratio only among the figure.Secondary is smooth flat aluminium conductor plate, and the structure of horizontal direction is determined by the application scenario; The horizontal direction width should be more than or equal to elementary width unshakable in one's determination, make elementary iron core all be positioned at secondary directly over; During greater than 1mm, should use a plurality of thin conductor laminations at the secondary conductor plate thickness, reduce that system is produced the irrelevant vertical direction eddy current component of suspending power, improve the suspending power luminous efficiency.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and identical similar part is mutually referring to getting final product between each embodiment.
More than for this patent provided a kind of rotating magnetic field electrodynamic levitation system, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (5)
1. often lead rotating magnetic field electrodynamic levitation system for one kind, it is elementary to comprise that elementary iron core (3), AC Windings (2) are formed, and smooth strap plate secondary (1), it is characterized in that: the ring-type of described elementary iron core (3) for radially slotting, described AC Windings (2) is placed in elementary iron core (3) groove; Smooth strap plate secondary (1) horizontal direction width should all be positioned at directly over the smooth strap plate secondary (1) elementary iron core (3) more than or equal to elementary iron core (3) width.
2. a kind of rotating magnetic field electrodynamic levitation system that often leads according to claim 1, it is characterized in that: described elementary iron core (3) is reeled for silicon strip and is formed, described AC Windings (2) is a copper core winding, and described smooth strap plate secondary (1) is the aluminium conductor plate.
3. a kind of rotating magnetic field electrodynamic levitation system that often leads according to claim 1 is characterized in that: vertical range between the primary and secondary require near or greater than 1cm.
4. a kind of rotating magnetic field electrodynamic levitation system that often leads according to claim 1, it is characterized in that: elementary AC Windings (2) can feed symmetrical three-phase or heterogeneous alternating current, and the winding configuration design should be according to the corresponding distribution of the primary current number of phases.
5. a kind of rotating magnetic field electrodynamic levitation system that often leads according to claim 4, it is characterized in that: elementary iron core (3) is radially being opened 24 grooves along the circumference symmetry; Symmetry is placed the three-phase alternating current winding in elementary iron core (3); AC Windings (2) adopts 4 utmost point chain structures; The three-phase current symmetry that AC Windings (2) feeds, 120 ° of phase phasic differences.
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| CN2011102418085A CN102291060A (en) | 2011-08-22 | 2011-08-22 | Normal-conducting rotating magnetic field electric type magnetic levitation system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016169363A1 (en) * | 2015-04-23 | 2016-10-27 | 清华大学 | Magnetic levitation momentum sphere |
| CN106443690A (en) * | 2016-08-31 | 2017-02-22 | 北京创想智控科技有限公司 | Magnetic suspension optical scanning range finding device and method |
| CN112165233A (en) * | 2020-09-07 | 2021-01-01 | 黄开午 | Circular vibration motor |
| CN115233300A (en) * | 2022-07-29 | 2022-10-25 | 江苏集芯半导体硅材料研究院有限公司 | Growing device of non-contact silicon carbide crystal |
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| CN2112704U (en) * | 1992-02-02 | 1992-08-12 | 杨山田 | Dynamic magnetic suspending buffer automobile engine |
| CN101719714A (en) * | 2009-11-05 | 2010-06-02 | 江苏大学 | Eddy current retarder of magnetic track of railway vehicle |
| US20100172775A1 (en) * | 2008-01-29 | 2010-07-08 | Iwaki Co., Ltd. | Maglev motor and pump |
| CN101850523A (en) * | 2010-03-18 | 2010-10-06 | 沈阳工业大学 | Magnetic suspension feeding platform of liner synchronous motor of digital control machine tool |
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2011
- 2011-08-22 CN CN2011102418085A patent/CN102291060A/en active Pending
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| CN2112704U (en) * | 1992-02-02 | 1992-08-12 | 杨山田 | Dynamic magnetic suspending buffer automobile engine |
| US20100172775A1 (en) * | 2008-01-29 | 2010-07-08 | Iwaki Co., Ltd. | Maglev motor and pump |
| CN101719714A (en) * | 2009-11-05 | 2010-06-02 | 江苏大学 | Eddy current retarder of magnetic track of railway vehicle |
| CN101850523A (en) * | 2010-03-18 | 2010-10-06 | 沈阳工业大学 | Magnetic suspension feeding platform of liner synchronous motor of digital control machine tool |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016169363A1 (en) * | 2015-04-23 | 2016-10-27 | 清华大学 | Magnetic levitation momentum sphere |
| US10532832B2 (en) | 2015-04-23 | 2020-01-14 | Tsinghua University | Magnetic levitation reaction sphere |
| CN106443690A (en) * | 2016-08-31 | 2017-02-22 | 北京创想智控科技有限公司 | Magnetic suspension optical scanning range finding device and method |
| CN106443690B (en) * | 2016-08-31 | 2023-11-24 | 北京创想智控科技有限公司 | Magnetic suspension optical scanning distance measuring device and method |
| CN112165233A (en) * | 2020-09-07 | 2021-01-01 | 黄开午 | Circular vibration motor |
| CN112165233B (en) * | 2020-09-07 | 2023-08-18 | 黄开午 | Circular vibration motor |
| CN115233300A (en) * | 2022-07-29 | 2022-10-25 | 江苏集芯半导体硅材料研究院有限公司 | Growing device of non-contact silicon carbide crystal |
| CN115233300B (en) * | 2022-07-29 | 2023-12-26 | 江苏集芯先进材料有限公司 | Non-contact silicon carbide crystal growth device |
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Application publication date: 20111221 |