CN101944821B - Permanent-magnet damping linear generator - Google Patents
Permanent-magnet damping linear generator Download PDFInfo
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- CN101944821B CN101944821B CN2010102916512A CN201010291651A CN101944821B CN 101944821 B CN101944821 B CN 101944821B CN 2010102916512 A CN2010102916512 A CN 2010102916512A CN 201010291651 A CN201010291651 A CN 201010291651A CN 101944821 B CN101944821 B CN 101944821B
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Abstract
The invention discloses a permanent-magnet damping linear generator which comprises a shell, end covers, a rotor and a stator, wherein the end covers are arranged at both ends of the shell; the rotor and the stator are arranged in the cavity of the shell; the stator comprises a cylindrical winding bracket and a winding; the winding bracket is coaxial with the shell, and the winding is arranged outside the winding bracket; a wire lead-out groove is left between the winding bracket and the shell; the shell is provided with a wire lead-out hole which is communicated with the wire lead-out groove; the rotor is a cylinder which is coaxial with the shell, and comprises a plurality of axially-magnetizing rotor permanent magnets and iron cores; the iron cores are arranged between every two adjacent rotor permanent magnets; the magnetizing directions of every two adjacent rotor permanent magnets are opposite; the diameter of the rotor permanent magnet is equal to that of the iron core; fixed permanent magnets are arranged inside the end covers; and the magnetizing directions of the fixed permanent magnets and the rotor permanent magnets adjacent to the end parts of the fixed permanent magnets are opposite. The permanent-magnet damping linear generator has the advantages of simple structure, high induced electromotive force and low production cost.
Description
Technical field
The present invention relates to the small power generation equipment technical field, relate in particular to a kind of permanent magnet damping linear generating set.
Background technology
The industrial occasions that some is specific is because the requirement of operational environment needs the employing wireless transducer.Yet existing wireless senser mainly uses powered battery, and shortcoming is that battery energy storage is limited, needs periodic replacement, increases the cost of safeguarding, reduces system reliability.
Energy harvester can become electric energy with the existing power conversion of equipment work environment, replaces battery.Present existing energy harvester mainly is to convert heat energy, luminous energy, vibrational energy to electric energy.The form that vibrational energy is converted to electric energy mainly contains electromagnetic type, piezoelectric type, electrostatic.Existing electromagnetic type adopts spring-mass system more, amplifies vibration through spring, makes that different piece produces relative motion in the energy harvester, converts corresponding vibrational energy to electric energy.When adopting spring-mass system, the coefficient of elasticity of spring selects to receive easily the restriction (spring constant of actual spring has corresponding national standards) of actual spring.Because coefficient of elasticity is for discrete, and the quality of the coefficient of elasticity of the setting of the natural frequency of system and spring and mover is relevant, equates so very difficult natural frequency with system is adjusted to the vibration source frequency.In addition, the coefficient of elasticity of actual spring one regularly effective figure number of respective springs, spring filament diameter etc. are had certain requirement, and then the installation dimension of spring is bigger with the big or small restriction ratio in space; In similar system, adopt stage clip at present mostly, under the bigger situation of vibration source acceleration, may damage spring, limit the stroke of mover simultaneously, also increased the manufacturing cost of energy harvester simultaneously.
Publication number is the vibration generating device that the patent documentation of CN1877973 discloses a kind of portable electric appts; This device adopts permanent magnet reciprocating motion in the motion cavity; Produce relative motion with winding; In winding, produce induced current through cutting magnetic line, and rectification becomes direct current, be battery charge.This vibration generating device motion cavity has only a permanent magnet; The induced potential that produces is smaller; When needing certain induced voltage, the length of monolithic permanent magnet is certain simultaneously, and is smaller with the adjustable extent of the spring constant of end permanent magnet interaction equivalent spring like this.Designing a kind of characteristic and load characteristic according to vibration source selects corresponding winding and spring constant to become the problem that present needs solve.
Summary of the invention
The invention provides a kind of simple in structure, induced electromotive force is high, production cost is lower permanent magnet damping linear generating set.
A kind of permanent magnet damping linear generating set comprises the end cap at columnar casing, casing two ends and is arranged on mover, stator and the fixed permanent magnet in the chassis cavity; Described stator comprises and coaxial columnar winding support of casing and the winding that is wrapped in the winding support outside; Winding support is a non-magnet material; Leave the lead lead-out groove between winding support and the casing, casing is provided with the lead outlet, and the lead outlet is communicated with the lead lead-out groove; Described mover is the cylinder coaxial with casing; Be positioned at winding support; Described mover comprises the rotor permanent magnet of some axial chargings, unshakable in one's determination between adjacent two rotor permanent magnet and with the sheath of rotor permanent magnet and parcel unshakable in one's determination; Sheath is a non-magnet material, and adjacent two rotor permanent magnet magnetizing directions are opposite, and rotor permanent magnet equates with core-diameter; Described end cap inboard is fixed with fixed permanent magnet, and fixed permanent magnet is opposite with rotor permanent magnet magnetizing direction near the mover end of fixed permanent magnet.
The end cap at casing and casing two ends all can be selected permeability magnetic material; Can be cylindrical shape, cuboid or other shapes according to the different chassis bodies of practical application; Be uniformly distributed with connecting hole on casing and the end cap, be used for winding support is fixed with casing and being connected of casing and vibration source.The diameter of casing and length generally can be confirmed according to actual needs.Chassis body leaves the lead fairlead near an end of end cap, is used for the lead of winding is drawn, and conveniently is connected with external components.
Winding support generally can be selected the high molecular polymer non-magnet material for use for having certain thickness cylinder, and the winding support outer wall is provided with annular groove, and the annular groove operated by rotary motion is at the middle part of winding support outer wall; The width of cannelure, the degree of depth and number is set adjusts according to actual needs; The winding support outer wall is provided with the lead lead-out groove, and the lead lead-out groove is connected with annular groove, and the lead lead-out groove is communicated with the lead fairlead of chassis body, the winding of being convenient to winding be connected; The setting of lead lead-out groove can help reducing the overall volume of TRT so that compact more between winding support and the casing on the other hand.Winding support is inboard perhaps to spray lubricant simultaneously through polishing, can reduce the reciprocating frictional force of mover like this, and noise-decreasing.
Mover is made up of rotor permanent magnet, iron core and parcel rotor permanent magnet and sheath unshakable in one's determination, and under the attraction of mutual magnetic force, rotor permanent magnet is formed complete cylinder with iron core.Jacket outer surface is through polishing, further to reduce the reciprocating frictional force of mover; Rotor permanent magnet can be selected the common ferrite in market, neodymium iron boron or SmCo for use.Iron core can be formed or be made up of silicon steel plate packing by solid-iron.The shape of mover also can be adjusted according to actual needs.Rotor permanent magnet adopts axial charging, processes more conveniently, and production cost is lower.Adjacent two rotor permanent magnet magnetizing directions are opposite, and the magnetic line of force radially spreads in the iron core, and is vertical with the winding coil of stator, the close increase of the magnetic in the air gap, and the winding perpendicular cuts magnetic line of force of stator, the induced electromotive force of generation increases; Generally can be in the practical application through adjustment rotor permanent magnet and relative thickness unshakable in one's determination; The adjustment air-gap field; Can adjust the pole span of mover through the thickness of adjusting a pair of rotor permanent magnet and adjacent iron core, cooperate the stator winding coil, the waveform of adjustment induced potential.Mover adopts the polylith permanent magnet, and number of pole-pairs is more, makes that the utilance of stator winding coil improves in the whole stroke of mover.Rotor permanent magnet is surrounded by sheath with iron core is outer, and is as a whole to guarantee whole mover, convenient to carrying out polishing outside the whole mover, reduces the friction of mover and stator winding support.
Permanent magnet can be selected to install and fix in the end cap inboard at casing two ends, and fixed permanent magnet can be selected ferrite, neodymium iron boron or SmCo equally, and the number of fixed permanent magnet can be one or two; Because end cap is a magnetic material, can fixed permanent magnet directly be fixed on the end cap inboard through attractive magnetic force, and is easy for installation.When charging device horizontal positioned of the present invention is used, a fixed permanent magnet need be set in the inboard of two end caps respectively.The repulsion effect of the rotor permanent magnet at fixed permanent magnet and mover two ends makes mover reciprocating motion in winding support, avoids producing the mechanical stretching collision.When above-mentioned TRT is vertically placed use, generally only need a fixed permanent magnet to be set and get final product in end cap inboard, casing bottom, mover does pumping in winding support under the interaction of repulsion and self gravitation.The fixed permanent magnet of end and the interaction between the rotor permanent magnet are equivalent to spring structure; Adopt the magnetic force equivalent spring of end fixed permanent magnet and rotor permanent magnet; Thickness, area, the relative distance of adjustment end fixed permanent magnet and rotor permanent magnet can be continuous within the specific limits the coefficient of elasticity of adjustment equivalent spring, thereby can realize TRT being provided with different natural frequencys according to different occasions.The vibration frequency of final meeting of the vibration frequency of mover and vibration source equates in the use; When the vibration frequency of the natural frequency of TRT self and vibration source is consistent; Just can the vibration of vibration source be amplified to maximum, promptly at this moment the amplitude of mover is maximum, and the relative motion of mover and stator is maximum; Thereby can collect more electric energy, improve final generating efficiency.
Stator winding is by the enamelled wire coiled, and winding can be single-phase winding or three phase windings according to actual needs.Single-phase winding is in the one-period at a pair of pole span of mover, and the magnetic direction that mover is set up in preceding half period and the back half period is opposite, do not offset for guaranteeing the back-emf stack of series connection back, the winding in two half period around on the contrary.Three phase windings in the mover one-period, differ 120 degree electrical degrees between three phase windings, guarantee the stack of winding back-emf forward with phase winding winding, closure in the different cycles scope, to obtain more back-emf.Between the two adjacent groups winding around on the contrary.
The beneficial effect that the present invention brings is embodied in:
Repulsion between the permanent magnets such as the end rotor permanent magnet that (1) TRT of the present invention can be through regulating mover and the thickness of fixed permanent magnet, area; Equivalent spring coefficient when promptly regulating damped motion; In conjunction with the quality of mover can regulating system natural frequency; Thereby be applicable to the vibration source in the certain limit, realize that the generating efficiency of TRT is maximum without frequency;
(2) through regulating thickness, the quantity of rotor permanent magnet in the mover, in conjunction with thickness quantity unshakable in one's determination, and the distribution of winding, can produce single-phase, three-phase induction electromotive force, and can control the size of induced electromotive force, to satisfy the needs of different occasions;
(3) the vibration conversion of the mechanical damping of TRT of the present invention is relatively independent with the control of electromagnetic action generation electric energy to the control of natural frequency, can separately control, and practicality is stronger.
Description of drawings
Fig. 1 is a TRT horizontal positioned of the present invention structural representation when using;
Fig. 2 be among Fig. 1 TRT along the profile of A-A face;
Fig. 3 is the partial enlarged drawing of TRT B part among Fig. 2;
Structural representation when Fig. 4 vertically places use for TRT of the present invention;
Fig. 5 is used to produce the circuit diagram of single-phase induction electromotive force for TRT of the present invention;
Fig. 6 is used to produce the circuit diagram of three-phase induction electromotive force for TRT of the present invention.
Embodiment
Like Fig. 1, Fig. 2 and shown in Figure 4, a kind of permanent magnet damping linear generating set comprises the end cap at casing 1, casing 1 two ends, the inboard fixed permanent magnet 9 of stator, mover and end cap in the casing 1.
Shown in Fig. 1～3, end cap comprises first end cap 2 and second end cap 12, and casing 1 is permeability magnetic material with end cap, and casing 1 is a cylindrical shape.Also can select cuboid or other shapes according to the different casings 1 of practical application.Be uniformly distributed with connecting hole on casing 1, first end cap 2 and second end cap 12, be used for winding support is fixed with casing and being connected of casing and vibration source.The diameter of casing 1 and length generally can be confirmed according to actual needs.Casing 1 leaves lead fairlead 6 near an end of first end cap 2.
Shown in Fig. 1～4, stator comprises the winding 4 in the winding support 3 and the winding support outside.Winding support 3 is the high molecular polymer non-magnet material.Winding support 3 is for having certain thickness cylinder, and winding support 3 outer walls are provided with annular groove 10, and the number of groove 10 is 6, and the number of groove 10, width and the degree of depth all can be confirmed according to actual needs.Winding support 3 outer walls are provided with lead lead-out groove 5; Lead lead-out groove 5 be communicated with groove 10 and with winding support 3 coaxial settings; Lead lead-out groove 5 ports of export are communicated with lead fairlead 6, terminate in the groove near second end cap 12 away from the other end of lead fairlead 6, are convenient to the layout of winding 4.Winding support 3 adopts bolts the three to be fixedly connected with connecting hole on the end cap through casing 1.Winding 4 is the enamelled wire coiled, is single-phase winding, and winding 4 also can be arranged as three phase windings according to actual needs, to produce the three-phase induction electromotive force.The inner chamber of winding support 3 is the reciprocating track of mover, can spray lubricant then with its inner surface through polishing for reducing resistance and noise.
Shown in Fig. 1～4, mover is made up of the sheath 11 of rotor permanent magnet 7, iron core 8 and parcel rotor permanent magnet 7 and unshakable in one's determination 8, and under the attraction of mutual magnetic force, rotor permanent magnet is formed complete cylinder with iron core.The quantity of rotor permanent magnet 7 is 7, can select the common ferrite in market, neodymium iron boron or SmCo for use, and the quantity of rotor permanent magnet also can be adjusted according to actual needs.8 quantity unshakable in one's determination are 6, can select for use by solid-iron and form or be made up of silicon steel plate packing.The shape of mover also can be adjusted according to actual needs.Adjacent two rotor permanent magnet magnetizing directions are opposite, and the magnetic line of force radially spreads in the iron core, and is vertical with the winding coil of stator, and it is close to have increased the magnetic in the air gap, the winding perpendicular cuts magnetic line of force of stator, and the induced potential of generation increases; Generally can be in the practical application through the relative thickness of adjustment rotor permanent magnet and mover core, the adjustment air-gap field, the thickness of adjustment rotor permanent magnet and adjacent iron core can be adjusted the pole span of mover, cooperates the stator winding coil, adjusts the waveform of back-emf.Be surrounded by sheath 11 outside the rotor permanent magnet 7 and unshakable in one's determination 8, as a whole to guarantee whole mover, convenient to carrying out polishing outside the whole mover, reduce the friction between mover and the stator winding support 3.
As shown in Figure 1, when TRT horizontal positioned of the present invention was used, the inboard of first end cap 2 and second end cap 12 was respectively equipped with a fixed permanent magnet 9; Fixed permanent magnet 9 is an axial charging, and the fixed permanent magnet 9 in left side is opposite with the magnetizing direction of the rotor permanent magnet 7 of mover left end end, and right side fixed permanent magnet 9 is opposite with rotor permanent magnet 7 magnetizing directions of mover right-hand member end; Produce repulsion between mover and the fixed permanent magnet 9, mover is not in stability when having external force, and mover keeps identical distance with the fixed permanent magnet 9 at two ends; When receiving extraneous vibration, the mover disequilibrium, mover moves to an end; Rotor permanent magnet 7 reduces with the distance of this end; Repulsion increases, and hinders mover and further moves to this end, and mover leans on the repulsion effect of inertia and two ends fixed permanent magnet 9 constantly to move reciprocatingly.As shown in Figure 4, when TRT of the present invention vertically is provided with use, only needs to be provided with a fixed permanent magnet 9 and get final product in the inboard of first end cap 2, under the effect of repulsion and mover own wt, realize pumping of mover.
As shown in Figure 5; When the present invention need produce the single-phase induction electromotive force, winding 4 was set to single-phase winding, and winding 4 has been formed AC power S; Alternating current by power supply S generation; Carry out single-phase rectifier through single-phase diode D1, D2, D3 and D4, to the charging of energy storage device capacitor C, capacitor C provides electric energy to load appliance L after the rectification.As shown in Figure 6; When the present invention need produce three-phase induction electric current electromotive force; Winding 4 need be set to three phase windings, and three windings are formed AC power SA, SB and SC respectively, and SA, SB and SC carry out three phase rectifier through D1, D2, D3, D4, D5 and D6 respectively; The back is to the charging of energy storage device capacitor C, and capacitor C provides electric energy to load appliance L.Capacitor C among Fig. 5 and Fig. 6 also can replace with storage battery according to actual needs.
Claims (7)
1. a permanent magnet damping linear generating set comprises the end cap at columnar casing (1), casing (1) two ends and is arranged on mover and the stator in casing (1) cavity; Described stator comprises and coaxial columnar winding support (3) of casing (1) and the winding (4) that is wrapped in winding support (3) outside; Winding support (3) is a non-magnet material; Leave lead lead-out groove (5) between winding support (3) and the casing (1); Casing (1) is provided with lead outlet (6), and lead outlet (6) is communicated with lead lead-out groove (5); Described mover is and the coaxial cylinder of casing (1); Be positioned at winding support (3); It is characterized in that described mover comprises the rotor permanent magnet (7), the iron core (8) between adjacent two rotor permanent magnet of some axial chargings and with the sheath (11) of rotor permanent magnet (7) and (8) unshakable in one's determination parcel, sheath (11) is a non-magnet material; Adjacent two rotor permanent magnet magnetizing directions are opposite, rotor permanent magnet (7) and (8) equal diameters unshakable in one's determination; The inboard of described end cap is fixed with fixed permanent magnet (9), and fixed permanent magnet (9) is opposite with rotor permanent magnet magnetizing direction near the mover end of fixed permanent magnet (9); Described winding support (3) outer wall is provided with the annular groove (10) that is used to place winding (4); Described winding support (3) outer wall is provided with lead lead-out groove (5), and lead lead-out groove (5) is connected with annular groove (10); The end cap at described casing (1) and casing (1) two ends is made up of permeability magnetic material.
2. permanent magnet damping linear generating set according to claim 1 is characterized in that, described sheath (11) and winding support (3) are the high molecular polymer non-magnet material.
3. permanent magnet damping linear generating set according to claim 1 is characterized in that, described rotor permanent magnet (7) and fixed permanent magnet (9) are ferrite, neodymium iron boron or SmCo.
4. permanent magnet damping linear generating set according to claim 1 is characterized in that, described iron core (8) is made up of solid-iron or is made up of silicon steel plate packing.
5. permanent magnet damping linear generating set according to claim 1 is characterized in that, described winding (4) is single-phase winding or three phase windings.
6. permanent magnet damping linear generating set according to claim 1 is characterized in that, described casing (1) vertically is provided with, and the end cap inboard of casing (1) bottom is provided with fixed permanent magnet (9).
7. permanent magnet damping linear generating set according to claim 1 is characterized in that, described casing (1) horizontal positioned, and end cap inboard, casing (1) two ends is respectively equipped with fixed permanent magnet (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102916512A CN101944821B (en) | 2010-09-26 | 2010-09-26 | Permanent-magnet damping linear generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102916512A CN101944821B (en) | 2010-09-26 | 2010-09-26 | Permanent-magnet damping linear generator |
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| Publication Number | Publication Date |
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| CN101944821A CN101944821A (en) | 2011-01-12 |
| CN101944821B true CN101944821B (en) | 2012-07-04 |
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| CN2010102916512A Expired - Fee Related CN101944821B (en) | 2010-09-26 | 2010-09-26 | Permanent-magnet damping linear generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014013384A1 (en) * | 2014-09-09 | 2016-03-10 | Linde Aktiengesellschaft | Pole carrier for an electro-mechanical energy converter |
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| CN102278411A (en) * | 2011-06-03 | 2011-12-14 | 嘉兴学院 | Self-powered magnetic current changing damper and vibration damping system thereof |
| CN102223049A (en) * | 2011-06-03 | 2011-10-19 | 嘉兴学院 | Permanent magnet linear generator, magnetorheological damper and magnetorheological damping system thereof |
| CN102594083A (en) * | 2012-03-01 | 2012-07-18 | 张有权 | Reciprocating type permanent magnet linear generator |
| CN105591516A (en) * | 2015-09-18 | 2016-05-18 | 王宁宁 | Spontaneous power generation device based on vibration mechanical energy |
| CN106160394B (en) * | 2016-07-15 | 2018-07-03 | 西安交通大学 | A kind of magnetic spring electromagnetic vibration energy trap setting |
| CN106411094B (en) * | 2016-11-30 | 2019-03-22 | 杨明远 | A kind of permanent magnetic vibration power generation portable power supplies |
| CN106594140A (en) * | 2017-03-01 | 2017-04-26 | 河北宝力工程装备股份有限公司 | Novel electromagnetic damper |
| CN110336444A (en) * | 2019-08-15 | 2019-10-15 | 赵景焕 | A kind of round-trip DC frequency-changing power generator of straight line |
| CN111064341B (en) * | 2020-01-15 | 2021-12-21 | 哈尔滨工程大学 | Six-unit permanent magnet linear motor |
| CN112583226A (en) * | 2020-10-30 | 2021-03-30 | 深圳供电局有限公司 | Permanent magnet vibration power generation device and cable detection system |
| CN113746297B (en) * | 2021-09-01 | 2022-09-02 | 西安工程大学 | Variable mass linear generator capable of drawing vibration energy |
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|---|---|---|---|---|
| CN1877973A (en) * | 2006-06-30 | 2006-12-13 | 深圳市杰特电信控股有限公司 | Vibration generating device for portable electronic apparatus |
| CN101170271A (en) * | 2006-10-27 | 2008-04-30 | 中国科学院理化技术研究所 | Plant-in long-life micro battery for power generation based on physical body motion energy |
| CN101669269A (en) * | 2007-05-09 | 2010-03-10 | 胜美达集团株式会社 | Oscillation type electromagnetic power generator and method for manufacturing oscillation type electromagnetic power generator |
| CN201830126U (en) * | 2010-09-26 | 2011-05-11 | 浙江大学 | Permanent magnet damping linear generating set |
-
2010
- 2010-09-26 CN CN2010102916512A patent/CN101944821B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1877973A (en) * | 2006-06-30 | 2006-12-13 | 深圳市杰特电信控股有限公司 | Vibration generating device for portable electronic apparatus |
| CN101170271A (en) * | 2006-10-27 | 2008-04-30 | 中国科学院理化技术研究所 | Plant-in long-life micro battery for power generation based on physical body motion energy |
| CN101669269A (en) * | 2007-05-09 | 2010-03-10 | 胜美达集团株式会社 | Oscillation type electromagnetic power generator and method for manufacturing oscillation type electromagnetic power generator |
| CN201830126U (en) * | 2010-09-26 | 2011-05-11 | 浙江大学 | Permanent magnet damping linear generating set |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102014013384A1 (en) * | 2014-09-09 | 2016-03-10 | Linde Aktiengesellschaft | Pole carrier for an electro-mechanical energy converter |
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