CN106655555B - Radial rotary converter for three-phase iron core type wireless energy transmission - Google Patents
Radial rotary converter for three-phase iron core type wireless energy transmission Download PDFInfo
- Publication number
- CN106655555B CN106655555B CN201610893699.8A CN201610893699A CN106655555B CN 106655555 B CN106655555 B CN 106655555B CN 201610893699 A CN201610893699 A CN 201610893699A CN 106655555 B CN106655555 B CN 106655555B
- Authority
- CN
- China
- Prior art keywords
- iron core
- stator
- rotor
- core
- coils
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention relates to a radial rotary converter for three-phase iron core wireless energy transmission, which comprises a stator iron core, a rotor iron core, a stator iron core and two iron cores which are coaxial and opposite to each other, wherein a gap is arranged between the stator iron core and the rotor iron core as an air gap, the air gap direction between the stator iron core and the rotor iron core is arranged radially with a motor rotating shaft, wire outlet grooves are respectively formed in the stator iron core and the rotor iron core, 6 three-phase stator coils are wound on the wire outlet grooves on the stator iron core, 6 three-phase stage coils are wound on the rotor iron core, the stator coils and the rotor coils coaxially correspond to each other, the 6 stator coils divide the interior of the stator iron core into 5 iron core columns, and the 6 rotor coils divide the interior of the stator iron core into 5 iron core columns. The rotary converter provided by the invention can effectively replace the brush structure without affecting the overall structure size of the motor, and can be maintained together with the motor body.
Description
Technical Field
The invention belongs to the field of three-phase power generation equipment, relates to a wireless energy transmission technology, and particularly relates to a radial rotary converter for wireless energy transmission of a three-phase iron core.
Background
It is known that rotary converters (different from the existing rotary transformer concept) can be applied to electric machines to replace brushes and slip rings, which can greatly improve reliability, without replacement of brushes, and without maintenance. With the increasing depth of research, especially the application of electromagnetic simulation technology, many problems of the current rotary converters are not properly solved. For example, when working magnetic flux passes through an air gap between a stator and a rotor of a rotary transformer, an edge effect is caused by scattering of the magnetic flux, if the rotary transformer core adopts a sheet-type core or a wound core like a motor, the stray magnetic flux vertically enters a steel sheet along the stacking direction to cause larger eddy current loss in a plane of the steel sheet, so that the transmission efficiency is reduced, and when high power is transmitted or high frequency is adopted, the iron cores on two sides of the air gap are seriously overheated to burn. As another example, if a lamination type core or a wound core is used, in a closed magnetic circuit of the rotary transformer, working magnetic flux passes through an air gap between steel sheets in some directions in addition to an indispensable air gap between stator and rotor, which tends to increase no-load current and no-load loss of the rotary transformer, and reduce transmission efficiency. When the rotary converter load works, if leakage magnetic flux caused by working current of the stator and rotor coils cannot be well absorbed and vertically enters the steel sheet, larger stray loss can be caused, transmission efficiency is reduced, and the problem is particularly remarkable when high power is transmitted.
On the other hand, when the high-power motor works by using the brush device, a worker is required to periodically patrol sparks generated by the brush every day, the dangerous level of the sparks is estimated, and the sparks seriously break down to stop for maintenance. Even if the cremation is in a normal range, the pollution caused by flying of the brush powder due to rotational abrasion is generated, and the brush with the same type needs to be replaced on a regular basis (days to months) or replaced by a new brush with the same type in a power failure mode, so that the maintenance workload is high.
For the rotary converter applied to the motor, if three-phase power supply is adopted, three independent three-phase rotary converter units are generally adopted for assembly, the three phases work independently, the magnetic circuits of the three-phase rotary converters are independent, so that the rotary converter is large in size and heavy in weight, the three-phase rotary converters are separated, are complex to install and fix, have poor overall stability during rotary operation, and have high requirements on assembly precision.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and the three phases share one iron core, so as to provide a radial three-phase iron core type wireless energy transmission rotary converter which reduces the loss of the rotary converter from the aspects of no-load and load.
The technical scheme adopted by the invention is as follows:
the utility model provides a three-phase core formula wireless energy transmission is with radial rotation converter, including stator core, rotor core, stator core, rotor core adopt coaxial, two relative iron cores, be provided with the interval between stator core, the rotor core as the air gap, the air gap direction between stator core, rotor core is radial setting with the motor pivot, be equipped with the wire casing respectively at stator core and rotor core, the wire casing on stator core is wound 6 stator coil, be wound 6 level coil on the rotor core, stator coil and rotor coil correspond with the axle, 6 stator coil cut apart into 5 iron core posts with stator core axial cross-section, 6 rotor coil cut apart into 5 iron core posts with stator core axial cross-section too.
Among the 5 core limbs in the stator core and the rotor core, two stator coils or two rotor coils are wound on two sides of each core limb, and the two core limbs on the outer side are wound with stator coils or rotor coils on the inner side only, so as to serve as A, B, C three-phase windings respectively.
Moreover, the sections of the stator core and the rotor core are circumferentially divided into a plurality of sectors, each sector is made of electrical steel strips with equal length into radial main stage sheets, each sector is filled with a plurality of electrical steel strips with decreasing sizes, the inner diameter side of each electrical steel strip on the core is supported by a copper sleeve, the outer diameter side of each electrical steel strip on the core is bound by a shrinkable fastening belt, and the rotor core is coaxially and fixedly arranged on a motor rotating shaft.
The distance between the stator core and the rotor core is 0.3-0.5 mm.
The stator core is fixed on the inner side wall of the motor end cover or other fixed parts of the motor through a screw rod, the stator core and one side of the rotor core close to the stator core are fixed with the motor rotating shaft through a coaxial fastening ring, and the other side of the rotor core is fixed with the motor rotating shaft through a coaxial baffle ring.
And the fastening ring is provided with a plurality of fixing feet with screw holes, and the fastening ring is also provided with a backstop screw.
The invention has the advantages and positive effects that:
the rotary converter provided by the invention can effectively replace the brush structure without affecting the overall structure size of the motor, and can be maintained together with the motor body. When the rotary converter adopts medium and high frequency to transmit alternating current energy, the rotary converter has the advantages of high power density and high efficiency.
The three-phase iron core type wireless energy transmission radial rotary converter provided by the invention is improved aiming at the iron core structure, the iron core type is optimized, and the thin electrical steel sheets with different lengths are radially stacked, so that on one hand, the iron core type can well absorb the edge magnetic flux at the air gap of the stator and the rotor, the local overheating of the steel sheets caused by the edge effect can be avoided, and the transmission efficiency is improved. On the other hand, the iron core type can enable working magnetic flux to circulate in the lamination planes, and in a closed magnetic circuit of the rotary converter, the working magnetic flux does not pass through other extra air gaps except the indispensable air gaps between the stator and the rotor, so that no-load current and no-load loss of the rotary converter are reduced, and the transmission efficiency is further improved. When the rotary converter load works, the iron core type can absorb leakage magnetic flux caused by working current of the stator and rotor coils well into the iron core without causing larger stray loss, and transmission efficiency is improved.
In the invention, the air gap can be about 0.3-0.5 mm. The device is wholly (including a fastener) in an axisymmetric structure, can ensure the stability of rotation, prevent rotation vibration and has a compact structure. The motor can be flexibly arranged without additionally increasing the size for replacing the modification of the electric brush and the slip ring.
Drawings
Fig. 1 is a schematic view (sectional structure) of a core structure of the present invention;
FIG. 2 is a schematic diagram (cross-sectional structure) of a rotary transformer according to the present invention;
fig. 3 is a schematic view of the fastening ring structure of the present invention.
Detailed Description
The invention will now be described in further detail with reference to the following specific examples, which are given by way of illustration only and not by way of limitation, and are not intended to limit the scope of the invention.
A three-phase iron core type wireless energy transmission radial rotation converter comprises a stator iron core 4, a rotor iron core 5, a motor rotating shaft 13, a lead 8, a power supply 9 and a rotor coil 10, wherein the cross sections of the stator iron core and the rotor iron core are divided into a plurality of sectors, each sector is made of an electrical steel strip 1 with equal length into radial main stage sheets, each sector is filled with a plurality of electrical steel strips with decreasing sizes, the inner diameter side of each electrical steel strip on the iron core is supported by a copper sleeve 2, the outer diameter side of each electrical steel strip on the iron core is bound by a retractable fastening belt (a thin-wall belt in the embodiment) 3, and the stator iron core and the rotor iron core are solidified into a whole through vacuum epoxy casting, so that the working magnetic density of the iron core is optimized, the thickness of an outer yoke (column) of the iron core is small, the cross section of the iron core is gradually reduced from inside to outside, and the cross section of the iron core is in a trapezoid shape, and the corresponding coil cross section is optimized from inside to outside to be in an inverted trapezoid shape. In order to reduce the edge effect, the air gap flux density mentioned below is suitably reduced, and the cross section at the air gap is increased.
As shown in fig. 2, the stator core and the rotor core are coaxial and opposite, so that the influence of the working magnetic field on the components except the cores is negligible, and the stator core and the rotor core are particularly suitable for excitation of a high-frequency power supply. A space of 0.3-0.5 mm is arranged between the stator core and the rotor core as an air gap.
Wire outlet grooves are respectively formed in the stator iron core and the rotor iron core, grooves are formed in the outer sides of the wire outlet grooves, epoxy resin is used for solidifying and filling after coils are placed in the wire outlet grooves, the coils can be prevented from loosening during rotation, a plurality of stator coils 6 are wound on the wire outlet grooves on the stator iron core, a plurality of rotor coils 7 are wound on the rotor iron core, the iron core can wrap the primary coils and the rotor coils respectively, for a three-phase synchronous generator, the stator coils are connected with a 50Hz or medium-high frequency AC power supply through leads, and the rotor coils are connected with the rotor coils of the motor through leads.
The stator coils and the rotor coils are 6 and coaxially correspond, the 6 stator coils divide the axial section of the stator core into 5 iron core columns, two sides of each column are wound by two stator coils to be A, B, C three-phase windings respectively, the two outer iron core columns are only internally wound with the stator coils, the 6 rotor coils divide the axial section of the rotor core into 5 iron core columns, two sides of each column are wound by two rotor coils to be A, B, C three-phase windings respectively, and the two iron core columns at two sides are only internally wound with the rotor coils. The axial section structure of the invention is similar to the section of a three-phase five-limb transformer core.
The rotor core is coaxially and fixedly arranged on the motor rotating shaft, the stator core is fixed on the inner side wall 12 of the motor end cover or other fixed parts of the motor through a screw 11, the air gap direction between the stator core and the rotor core is arranged radially with the motor rotating shaft, namely, the air gap is vertical to the motor rotating shaft, the position, close to the rotor core, of the stator core is fixed with the motor rotating shaft through a coaxial fastening ring 15, and the position, far away from the rotor core, of the rotor core is fixed with the motor rotating shaft through a coaxial baffle ring 14.
Referring to fig. 3, the fastening ring is provided with a plurality of fixing legs 16 having screw holes, and a retaining screw 17 is further provided on the fastening ring.
The magnetic circuit and circuit parameters of the rotary converter can be designed according to different motor types and working conditions, so that the rotary converter is more matched with the relevant characteristics of the motor, for example, the starting and speed regulation performance of a three-phase wound motor, the excitation regulation modes and strategies of a doubly-fed generator and a synchronous generator can be improved.
Claims (2)
1. The utility model provides a three-phase core formula wireless energy transmission is with radial rotation converter, includes stator core, rotor core, stator core, rotor core adopt coaxial, two relative iron cores, is provided with the interval between stator core, the rotor core as the air gap, its characterized in that: the air gap direction between the stator iron core and the rotor iron core is radial to the motor rotating shaft, the stator iron core and the rotor iron core are respectively provided with wire outlet grooves, 6 stator coils are wound on the wire outlet grooves on the stator iron core, 6 rotor coils are wound on the rotor iron core, the stator coils and the rotor coils coaxially correspond, 6 stator coils divide the axial section of the stator iron core into 5 iron core columns, 6 rotor coils divide the axial section of the stator iron core into 5 iron core columns, two stator coils or two rotor coils are wound on two sides of each column respectively to serve as A, B, C three-phase windings in the middle three iron core columns, only the inner side of each of the two iron core columns is wound with a stator coil or a rotor coil, the stator iron core and the rotor iron core are circumferentially divided into a plurality of sectors on the section, each sector is made of electrical steel strips with equal length into radial main stage sheets, each sector is filled with a plurality of electrical steel strips with decreasing sizes, the inner diameter side of each electrical steel strip on the iron core is supported by a copper sleeve, the outer diameter side of each electrical steel strip on the iron core is bound by a shrinkable fastening belt, the rotor iron core is coaxially and fixedly arranged on a motor rotating shaft, the interval between the stator iron core and the rotor iron core is 0.3-0.5 mm, the stator iron core is fixed on the inner side wall of an end cover of the motor or other fixed parts of the motor through a screw rod, the stator iron core and one side of the rotor iron core close to the stator iron core are fixed with the motor rotating shaft through a coaxial fastening ring, and the other side of the rotor iron core is fixed with the motor rotating shaft through a coaxial baffle ring.
2. The three-phase core-type radial rotary transducer for wireless energy transmission according to claim 1, wherein: the fastening ring is provided with a plurality of fixing feet with screw holes, and the fastening ring is also provided with a retaining screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610893699.8A CN106655555B (en) | 2016-10-13 | 2016-10-13 | Radial rotary converter for three-phase iron core type wireless energy transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610893699.8A CN106655555B (en) | 2016-10-13 | 2016-10-13 | Radial rotary converter for three-phase iron core type wireless energy transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106655555A CN106655555A (en) | 2017-05-10 |
| CN106655555B true CN106655555B (en) | 2023-08-18 |
Family
ID=58855693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610893699.8A Active CN106655555B (en) | 2016-10-13 | 2016-10-13 | Radial rotary converter for three-phase iron core type wireless energy transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106655555B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752471A (en) * | 2005-11-10 | 2006-03-29 | 北京航空航天大学 | Low watt consumption permanent magnet offset external rotor hybrid radial magnetic bearing |
| CN101025200A (en) * | 2007-04-02 | 2007-08-29 | 北京航空航天大学 | Permanent magnet polarized external rotor radial magnetic bearing |
| CN101051783A (en) * | 2006-04-06 | 2007-10-10 | 阿莫泰克有限公司 | Integrated stator, motor and method of making the same |
| WO2009055956A1 (en) * | 2007-10-29 | 2009-05-07 | Shenzhen Academy Of Aerospace Technology | Square-wave three-phase brushless permanent magnet dc motor |
| CN103607091A (en) * | 2013-12-05 | 2014-02-26 | 山西北方机械制造有限责任公司 | Quadrupole permanent magnet synchronous motor rotor |
| CN104753190A (en) * | 2013-12-31 | 2015-07-01 | 河南超微电动汽车有限公司 | Motor with axial magnetic circuit |
| CN104836398A (en) * | 2015-05-26 | 2015-08-12 | 哈尔滨工业大学 | Rotor magnetic concentrating double-stator transverse magnetic field permanent magnet synchronous motor |
| CN206490512U (en) * | 2016-10-13 | 2017-09-12 | 国网冀北电力有限公司技能培训中心 | A kind of tri-phase iron core formula radio energy-transmitting radial rotary converter |
-
2016
- 2016-10-13 CN CN201610893699.8A patent/CN106655555B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752471A (en) * | 2005-11-10 | 2006-03-29 | 北京航空航天大学 | Low watt consumption permanent magnet offset external rotor hybrid radial magnetic bearing |
| CN101051783A (en) * | 2006-04-06 | 2007-10-10 | 阿莫泰克有限公司 | Integrated stator, motor and method of making the same |
| CN101025200A (en) * | 2007-04-02 | 2007-08-29 | 北京航空航天大学 | Permanent magnet polarized external rotor radial magnetic bearing |
| WO2009055956A1 (en) * | 2007-10-29 | 2009-05-07 | Shenzhen Academy Of Aerospace Technology | Square-wave three-phase brushless permanent magnet dc motor |
| CN103607091A (en) * | 2013-12-05 | 2014-02-26 | 山西北方机械制造有限责任公司 | Quadrupole permanent magnet synchronous motor rotor |
| CN104753190A (en) * | 2013-12-31 | 2015-07-01 | 河南超微电动汽车有限公司 | Motor with axial magnetic circuit |
| CN104836398A (en) * | 2015-05-26 | 2015-08-12 | 哈尔滨工业大学 | Rotor magnetic concentrating double-stator transverse magnetic field permanent magnet synchronous motor |
| CN206490512U (en) * | 2016-10-13 | 2017-09-12 | 国网冀北电力有限公司技能培训中心 | A kind of tri-phase iron core formula radio energy-transmitting radial rotary converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106655555A (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20120218069A1 (en) | High frequency rotary transformer for synchronous electrical machines | |
| KR101377384B1 (en) | Stereo-triangular wound core power transformer with voltage class more than or equal to 110kv | |
| CN201956848U (en) | Permanent magnet synchronous wind generator with multi-layer windings | |
| CN105281467A (en) | Generator capable of long-term grid-connected operation | |
| CN106655555B (en) | Radial rotary converter for three-phase iron core type wireless energy transmission | |
| EP2216793B1 (en) | Cast-coil inductor | |
| CN106602756B (en) | Axial rotation converter for three-phase iron core type wireless energy transmission | |
| CN102916558B (en) | Cage-shaped rotor magnetic coupling capable of regulating speed | |
| CN108023452B (en) | High-voltage explosion-proof variable-frequency driving three-phase permanent magnet synchronous motor | |
| CN205489969U (en) | Miniature no iron core generator | |
| CN206490512U (en) | A kind of tri-phase iron core formula radio energy-transmitting radial rotary converter | |
| CN106130215B (en) | The stator of motor for working machine | |
| RU2152118C1 (en) | Slow-speed overhung multipole synchronous generator | |
| CN207098778U (en) | A kind of three-phase core type radio energy-transmitting axial-rotation converter | |
| CN201699555U (en) | Variable-pole-speed motor | |
| CN208939672U (en) | A kind of high efficiency coil windings stator and the generator with the wound stator | |
| CN203013483U (en) | Efficient silence non-crystal dry type transformer | |
| CN112311115B (en) | High-power asynchronous motor with adjustment retaining ring interference magnitude | |
| CN207968296U (en) | Based on energy feedback type permanent magnet speed regulation device | |
| CN102237736A (en) | Novel permanent magnet motor | |
| WO2020125206A1 (en) | First-level energy-efficient flameproof asynchronous-starting three-phase permanent magnet synchronous electric motor | |
| RU2522898C1 (en) | Terminal asynchronous electrical machine | |
| CN102111045A (en) | Multilayer winding permanent magnet synchronous wind generator | |
| CN205092682U (en) | Generator that can be incorporated into power networks for a long time | |
| CN206149031U (en) | Rotary converter can be used to wireless biography of single -phase core type |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |