CN104467343A - Cylindrical magnetic-pole combined linear generator - Google Patents
Cylindrical magnetic-pole combined linear generator Download PDFInfo
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- CN104467343A CN104467343A CN201410706736.0A CN201410706736A CN104467343A CN 104467343 A CN104467343 A CN 104467343A CN 201410706736 A CN201410706736 A CN 201410706736A CN 104467343 A CN104467343 A CN 104467343A
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- 238000004804 winding Methods 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 210000000078 claw Anatomy 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 8
- 210000004907 gland Anatomy 0.000 claims description 7
- 239000012141 concentrate Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- 230000004907 flux Effects 0.000 abstract description 15
- 238000010248 power generation Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000418 atomic force spectrum Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- Iron Core Of Rotating Electric Machines (AREA)
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Abstract
The invention discloses a cylindrical magnetic-pole combined linear generator which comprises a stator structure and a rotor structure. The stator structure comprises a stator iron core and a stator winding, wherein the stator iron core is connected with the stator winding in a gapless and sleeving mode. The rotor structure comprises a rotor iron core and a permanent magnet ring assembly. The permanent magnet ring assembly is pasted to the periphery of the rotor shaft iron core through a surface pasting type structure. The stator structure and the rotor structure are arranged at an interval. The rotor structure is located in the stator structure. Both the stator structure and the rotor structure are of a cylindrical structure. The stator iron core is of a slotless structure. The cylindrical magnetic-pole combined linear generator is small in jitter degree, good in air gap magnetic flux density sine performance, high in output electric energy quality, and especially suitable for being used in direct-drive power generation systems under the sea conditions of small waves near the coast and islands.
Description
Technical field
The present invention relates to a kind of linear electric motors, particularly a kind of tubular pole combination slotless linear electric generator, be mainly used in the power field of wave energy generating set or rectilinear motion driving.
Background technology
Wave-energy power generation has that clean energy is abundant, energy conversion principle simple, the advantage that relative cost is low.Adopt the direct-drive type wave energy Blast Furnace Top Gas Recovery Turbine Unit (TRT) of linear electric motors, the energy conversion device omitted in the middle of conventional power generation systems makes wave power utilization rate improve, and receives the concern of various countries' scientific researcher.
The permanent magnet linear generator limit end power of current spline structure used or cogging force are comparatively large, and cause Blast Furnace Top Gas Recovery Turbine Unit (TRT) energy loss large, generating efficiency is not high, mechanical oscillatory structure; In addition the radial direction that the many employings of motor are common, the magnet structure of axial permanent magnetic, make motor gas-gap magnetic flux density lower, and containing a large amount of harmonic waves, the quality of power supply sent is not high; Or adopt Halbach permanent array structure, the magnetic field, side of array is strengthened and opposite side field weakening, and the space magnetic field sine of the more voluminous life of every pole permanent magnet blocks number is better in Halbach permanent array, though can the problems referred to above be improved, but fine-drawn magnetizing direction and installation make the making of motor and processing technology just too complicated, affect motor performance, add cost of manufacture.
Summary of the invention
The technical problem to be solved in the present invention is shaken comparatively greatly in existing permanent-magnetism linear motor, and the air gap flux density waveform harmonics content of motor is large, exports the quality of power supply not high.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of tubular pole combination linear electric generator, comprises with lower component: stator structure: comprise stator core, stator winding, stator core gapless socket stator winding; Structure of mover: comprise mover iron core, magnet ring assembly, magnet ring assembly adopts surface-mount type structure to be affixed on the excircle of mover axle iron core; Between described stator structure and Structure of mover, gap is arranged, and Structure of mover is positioned at stator structure; Described stator structure and Structure of mover all adopt cylinder type, and described stator core adopts slotless structure.
Because stator structure and Structure of mover all adopt cylindrical structure, the radial forces between electric motor internal stator and mover is cancelled out each other; The stator of motor adopts slotless structure, decreases the axial force between electric motor internal stator and mover; In addition, the cartridge type project organization of this motor also reduces the jitter phenomenon of appearance when moving such as other generic linear motors such as flat grade, adds steadiness and the efficiency of motor; So non-resistance when electric motor starting, power consumption is few, and energy conversion rate is high, shake when running and littlely even not have.
For the air gap flux density waveform harmonics content overcoming motor is large, export the shortcoming that the quality of power supply is not high, described magnet ring assembly comprises the T-shaped magnet ring of radial magnetizing of at least two and the T-shaped magnet ring of axial charging of at least two, the T-shaped magnet ring of radial magnetizing and the T-shaped magnet ring of axial charging staggered, the broadside of the T-shaped magnet ring of radial magnetizing is towards the clearance side between stator structure and Structure of mover; The broadside of the T-shaped magnet ring of axial charging is towards mover core side; The magnetizing direction of adjacent T-shaped magnet ring differs 90 °, and the T-shaped magnet rings of every four continuous arrangements partner NS magnetic pole, and wherein the width of every block permanent magnet can be identical or different, and the width of adjacent magnetic pole is identical.T-shaped magnet ring is strengthened towards air gap side magnetic field intensity, weaken towards mover iron core side magnetic field intensity, therefore the iron core thickness needed for mover core side can reduce, the i.e. effective thickness saving mover core, reduce the total quality of mover, this feature is applicable to directly drive ocean wave energy generating set; The broadside of T-shaped magnet ring and the size on narrow limit adopt proportion optimizing K, and K value adjustable range is 0.5 ~ 0.8, by adjustment K value, can improve the induced potential peak value of motor, reduce the harmonic content of motor gas-gap magnetic flux density, improve the quality of power supply of generating.
Large as the air gap flux density waveform harmonics content overcoming motor, export the another kind of scheme of the not high shortcoming of the quality of power supply, described magnet ring assembly comprises claw type magnetic pole unit more than two, each claw type magnetic pole unit comprises three pieces of magnet rings, namely the magnetic pole magnet ring in the middle of and the guiding magnet ring of both sides, magnetic pole magnet ring is radial magnetizing, the both sides guiding magnetizing direction of magnet ring and the magnetizing direction angle of magnetic pole magnet ring are 45 °, and the magnetizing direction of the magnetic pole magnet ring of adjacent two claw type magnetic pole units differs 180 °, two adjacent claw type magnetic pole units partner NS magnetic pole, the width W 3 of magnetic pole magnet ring is 0.3 ~ 0.6 times of claw type magnetic pole unit width, 1.5 ~ 1.8 times that interval (i.e. pole span) between the unit of two adjacent claw type magnetic poles is claw type magnetic pole unit width.When the mover of motor does reciprocating linear motion, the magnetic field that permanent magnet produces will produce magnetic linkage in the stator windings, the change of magnetic linkage forms the unloaded induced electromotive force of generator, and the relation of permanent magnet flux linkage and induced electromotive force is such as formula the statement of (1) and formula (2).
In formula (1) and (2), B
rz () is magnetic flux density radial values, ψ, Φ are winding magnetic linkage and magnetic flux respectively, and n represents umber of turn, and D is stator outer diameter.B can be changed thus by the dimensional structure changing motor pole
rz the value of (), and then the value changing Φ, make motor gas-gap magnetic flux distribution close to Sine distribution, improve the sine producing electromotive force, namely reduce the harmonic content of electromotive force, improves motor and export the quality of power supply.
As a modification of the present invention scheme, be also provided with sealing ring and stator end cap, the outside of sealing ring socket stator core, stator end cap is arranged on the two ends of stator structure and the end face of stator core of fitting and the end face of sealing ring, is fixed by clinching mechanical device.In stator structure, adopt sealing ring and stator end cap, the waterproof of motor windings section can be realized, be beneficial to motor and run in water surface situation.
As another kind of improvement project of the present invention, stator core adopts silicon steel sheet to build up, and stator end cap adopts non-permeable material, and two ends end cap radius size is greater than stator core radius.Stator core adopts silicon steel sheet to build up, and can reach the advantage reducing eddy current loss; If end cap adopts magnetic conduction, also have suction, therefore, end cap adopts non-permeable material, can reduce limit end power; Two ends end cap radius size is greater than the radius of stator core, convenient installation.
For improving the energy conversion efficiency of system further, one end of mover iron core is also provided with gland, installs compression-spring device between gland and stator end cap.Compression-spring device is provided with between stator end cap and the gland of mover, can according to the movement travel of the change adjustment electric mover of wave wave height, realize the resonance of mover motion and wave float movement, make motor obtain maximum mover thrust directly driving in wave power generation process, improve the energy conversion efficiency of system.
As another kind of improvement project of the present invention, stator winding adopts concentrates cake formula stator winding.Compare this winding utilization of distributed winding high, the electromotive force amplitude of generation is large.
Advantage of the present invention is: structure is simple, efficiency is high, cost is low, it is little to shake, and can be used for the wave-energy power generation of Direct driver or adopts in the Blast Furnace Top Gas Recovery Turbine Unit (TRT) of rectilinear motion driving.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention.
Fig. 2 is structural representation of the present invention.
Fig. 3 is the partial structurtes schematic diagram (T-shaped) of magnet ring assembly of the present invention.
Fig. 4 is the air gap flux density curve chart of tubular pole combination linear electric generator of the present invention.
Fig. 5 is the partial structurtes schematic diagram (claw type) of magnet ring assembly of the present invention.
Fig. 6 is the change curve between the unloaded induced electromotive force that produces of tubular pole combination slotless linear electric generator of the present invention and the percent harmonic distortion THD% of electromotive force and ratio K.
Fig. 7 be the mover of tubular pole combination linear electric generator of the present invention when a certain position, unloaded magnetic line of force distribution map.
Fig. 8 is the tubular pole combination linear electric generator detent force curve of cyclical fluctuations of the present invention.
Embodiment
As shown in Figure 1-2, the invention provides a kind of cartridge type pole combination slotless linear electric generator, this permanent magnet generator mainly comprises stator core 1, concentrates cake formula stator winding 2; Mover core 3, magnetizing direction are the T-shaped magnet ring 4 of 90 ° of equal difference, be staggered installation of on mover core axle, wherein magnet ring adopts Nd-Fe-Bo permanent magnet material, and stator core is built up by silicon steel sheet, and mover core adopts good, that hardness the is large alloy of magnetic property to make.
Leave air gap 8 between stator structure and Structure of mover, outside stator core structure, be provided with sealing ring 9 and stator end cap 10, stator end cap adopts the material of non-magnetic performance and external diameter is greater than frame diameter, is convenient to fixed electrical machinery.Compression-spring device 11 is housed between stator end cap and mover end cap 12.
The non-stage clip side of the mover axle of motor is directly fixed on the float part of wave-power device, stator is arranged on the fixed support of Blast Furnace Top Gas Recovery Turbine Unit (TRT), the undulatory motion of wave drives float drive motor mover to do reciprocal rectilinear motion, through the change of the main flux generation size and Orientation of stator winding, then produce the generating that induced electromotive force realizes generator in the windings.
As shown in Figure 3, T-shaped magnet ring structure is staggeredly placed on mover axle, and wherein broadside adopts radial magnetizing towards the T-shaped magnet ring of air gap side; Broadside adopts axial charging towards the T-shaped magnet ring of mover core axle.
As shown in Figure 4, motor adopts T-shaped magnet ring combining structure, T-shaped magnet ring is strengthened towards air gap side magnetic field intensity, weaken towards mover iron core side magnetic field intensity, therefore the iron core thickness needed for mover core side can reduce, namely the effective thickness saving mover core, reduces the total quality of mover.
Be illustrated in figure 5 claw-type pole combining structure, each magnetic pole (N level or S level) adopts 3 pieces of permanent magnets, and the magnet ring of radial magnetizing forms magnetic pole in such an embodiment, and the magnet ring of both sides plays guide effect to the magnetic direction produced.What the width W 3 of the magnet ring of radial magnetizing determined permanent magnet effectively utilizes area, thus effectively reduces axial leakage flux, strengthens motor main flux density, improves the sine of air-gap field magnetic flux density.
As shown in Figure 6, the concrete size of T-shaped magnet ring will affect the dynamic property of motor to a great extent, ratio K is the ratio of W1 and W2, draw according to electromagnetic software analysis, be 0.4m/s in the point-to-point speed of cartridge type pole combination slotless linear electric generator of the present invention, when other parameter indexs are identical, when K value is about 0.55, the unloaded induced potential peak value of this motor can reach maximum; When K value is 0.75, machine induced electromotive force waveform harmonics aberration rate is minimum.
As shown in Figure 7, for motor permanent magnet adopts T-shaped magnet ring, the airgap density distribution curve produced when often pair of magnetic pole is 4 pieces of magnet structures, when often pair of pole piece number is even number, waveform peak is spill, and when block number is odd number, waveform steps on peak is convex.
Be illustrated in figure 8 the motor detent force curve of cyclical fluctuations.Motor stator adopts slotless structure, and armature winding adopts cake formula concentratred winding, and the number of turn of coil and wire diameter are fixed with designing requirement, and the bulk of each pie winding and the rational proportion of permanent magnet can lower the detent force between electric mover and stator.
Claims (10)
1. a tubular pole combination linear electric generator, comprises with lower component:
Stator structure: comprise stator core, stator winding, stator core gapless socket stator winding;
Structure of mover: comprise mover iron core, magnet ring assembly, magnet ring assembly adopts surface-mount type structure to be affixed on the excircle of mover axle iron core;
Between described stator structure and Structure of mover, gap is arranged, and Structure of mover is positioned at stator structure; It is characterized in that: described stator structure and Structure of mover all adopt cylinder type, described stator core adopts slotless structure.
2. a kind of tubular pole combination linear electric generator according to claim 1, it is characterized in that: described magnet ring assembly comprises the T-shaped magnet ring of radial magnetizing of at least two and the T-shaped magnet ring of axial charging of at least two, the T-shaped magnet ring of radial magnetizing and the T-shaped magnet ring of axial charging staggered, the broadside of the T-shaped magnet ring of radial magnetizing is towards the clearance side between stator structure and Structure of mover; The broadside of the T-shaped magnet ring of axial charging is towards mover core side;
The magnetizing direction of adjacent T-shaped magnet ring differs 90 °, and the T-shaped magnet rings of every four continuous arrangements partner NS magnetic pole, and wherein the width of every block permanent magnet can be identical or different, and the width of adjacent magnetic pole is identical.
3. a kind of tubular pole combination linear electric generator according to claim 1, it is characterized in that: described magnet ring assembly comprises claw type magnetic pole unit more than two, each claw type magnetic pole unit comprises three pieces of magnet rings, namely the magnetic pole magnet ring in the middle of and the guiding magnet ring of both sides, magnetic pole magnet ring is radial magnetizing, the both sides guiding magnetizing direction of magnet ring and the magnetizing direction angle of magnetic pole magnet ring are 45 °, and the magnetizing direction of the magnetic pole magnet ring of adjacent two claw type magnetic pole units differs 180 °, two adjacent claw type magnetic pole units partner NS magnetic pole, the width W 3 of magnetic pole magnet ring is 0.3 ~ 0.6 times of claw type magnetic pole unit width, 1.5 ~ 1.8 times that interval (i.e. pole span) between the unit of two adjacent claw type magnetic poles is claw type magnetic pole unit width.
4. a kind of tubular pole combination linear electric generator according to claim 1 or 2 or 3, it is characterized in that: be also provided with sealing ring and stator end cap, the outside of sealing ring socket stator core, stator end cap is arranged on the two ends of stator structure and the end face of stator core of fitting and the end face of sealing ring, is fixed by clinching mechanical device.
5. a kind of tubular pole combination linear electric generator according to claim 4, is characterized in that: stator core adopts silicon steel sheet to build up, and stator end cap adopts non-permeable material, and two ends end cap radius size is greater than stator core radius.
6. a kind of tubular pole combination linear electric generator according to claim 4, is characterized in that: one end of mover iron core is also provided with gland, installs compression-spring device between gland and stator end cap.
7. a kind of tubular pole combination linear electric generator according to claim 1 or 2 or 3 or 5, is characterized in that: one end of mover iron core is also provided with gland, installs compression-spring device between gland and stator end cap.
8. a kind of tubular pole combination linear electric generator according to claim 1 or 2 or 3 or 5, is characterized in that: stator winding adopts concentrates cake formula stator winding.
9. a kind of tubular pole combination linear electric generator according to claim 4, is characterized in that: stator winding adopts concentrates cake formula stator winding.
10. a kind of tubular pole combination linear electric generator according to claim 7, is characterized in that: stator winding adopts concentrates cake formula stator winding.
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| CN201410706736.0A CN104467343B (en) | 2014-11-27 | 2014-11-27 | A kind of tubular pole combination linear electric generator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017042273A1 (en) * | 2015-09-11 | 2017-03-16 | Beckhoff Automation Gmbh | Magnetic assembly for an electric motor |
| CN107124084A (en) * | 2017-06-09 | 2017-09-01 | 浙江理工大学 | A kind of permanent magnet linear synchronous motor non-uniform mixing permanent magnet excitation topological structure |
| CN108733963A (en) * | 2018-06-13 | 2018-11-02 | 马鞍山马钢电气修造有限公司 | A kind of threephase asynchronous permanent-magnetic energy-saving transformation rotor design method |
| CN109347292A (en) * | 2018-11-06 | 2019-02-15 | 武汉理工大学 | A kind of unmanned plane iron-core-free disc motor |
| CN111030414A (en) * | 2019-12-26 | 2020-04-17 | 兰州空间技术物理研究所 | Single-phase cylindrical linear oscillation motor |
| CN113746297A (en) * | 2021-09-01 | 2021-12-03 | 西安工程大学 | Variable mass linear generator capable of drawing vibration energy |
| CN114244062A (en) * | 2021-12-21 | 2022-03-25 | 杭州电子科技大学 | Linear reciprocating pump based on ferromagnetic structure and linear reciprocating driving method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113746297A (en) * | 2021-09-01 | 2021-12-03 | 西安工程大学 | Variable mass linear generator capable of drawing vibration energy |
| CN114244062A (en) * | 2021-12-21 | 2022-03-25 | 杭州电子科技大学 | Linear reciprocating pump based on ferromagnetic structure and linear reciprocating driving method thereof |
| CN114244062B (en) * | 2021-12-21 | 2022-12-30 | 杭州电子科技大学 | Linear reciprocating pump based on ferromagnetic structure and linear reciprocating driving method thereof |
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