CN108964308A - A kind of large inertia external rotor permanent magnetic brushless DC electric machine - Google Patents
A kind of large inertia external rotor permanent magnetic brushless DC electric machine Download PDFInfo
- Publication number
- CN108964308A CN108964308A CN201810640826.2A CN201810640826A CN108964308A CN 108964308 A CN108964308 A CN 108964308A CN 201810640826 A CN201810640826 A CN 201810640826A CN 108964308 A CN108964308 A CN 108964308A
- Authority
- CN
- China
- Prior art keywords
- stator
- electric machine
- large inertia
- external rotor
- permanent magnetic
- 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.)
- Pending
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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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/47—Air-gap windings, i.e. iron-free windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Brushless Motors (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a kind of large inertia external rotor permanent magnetic brushless DC electric machines, including outer rotor, permanent magnet, stator winding and skeleton, without stator core；Outer rotor is spindle hollow cylinder, and permanent magnet is attached on the outer yoke inner wall of outer rotor, and stator winding is fixed in skeleton.The present invention effectively increases the rotary inertia of motor by being spindle hollow cylinder by outer rotor designs；Also, stator core is free of in motor, therefore rotor will not all generate core loss in any revolving speed in the stator, also reduce the volume and weight of motor；In addition, being free of stator tooth socket in motor, the slot effect of conventional brushless DC motor can be eliminated, rotor torque is steady, is conducive to radiate, lossless.
Description
Technical field
The present invention relates to motors, more particularly to permanent-magnet brushless DC electric machine.
Background technique
Traditional permanent-magnet brushless DC electric machine, it is most of to contain stator core and rotor core, in the process of running, due to
Magnetic field in stator core and rotor core alternately changes and interacts, and magnetic hystersis loss and eddy-current loss will be generated, in high speed
When operation, this loss is particularly evident.Secondly as the presence of stator tooth socket, when the rotor rotates, can generate cogging torque and
Tooth socket harmonic wave, motor torque have pulsation.Additionally, due to balance car to the high request of balance quality, therefore high-speed motor must have
There is biggish rotary inertia, simultaneously because the limitation in space, when being designed to flywheel high-speed motor, it should reduce to the greatest extent whole
The volume of a system.Therefore, large inertia, low-loss, small become of volume weight design balance car occasion permanent magnet brushless dc
The critical issue of machine.
Summary of the invention
Goal of the invention: the object of the present invention is to provide the small large inertia outer rotors of a kind of large inertia, low-loss, volume weight
Permanent-magnet brushless DC electric machine.
Technical solution: to reach this purpose, the invention adopts the following technical scheme:
Large inertia external rotor permanent magnetic brushless DC electric machine of the present invention is determined including outer rotor, permanent magnet, non iron-core
Sub- winding and stator skeleton；Outer rotor is spindle hollow cylinder, and permanent magnet is attached on the outer yoke inner wall of outer rotor, stator around
Group is wound on stator skeleton.
Further, the stator winding is poured using epoxy resin.
Further, it is opened up on the stator skeleton there are three slot, the radian between two neighboring slot is 120 °, is equipped in slot
Hall sensor.
Further, the stator winding coiling when around stator skeleton using from inside to outside, from centre to two sides, successively around
The mode of system.The volume of stator winding can be further decreased in this way.
Further, the permanent magnet includes 8 magnetic poles, and each magnetic pole includes 3 pieces of Halbach magnets.It in this way can be into one
Step reduces the loss of motor, improves the rotary inertia of motor.
Further, the line footpath D=0.6mm of the stator winding, using 10 strands and around the mode of 7 circle of coiling.
The utility model has the advantages that the invention discloses a kind of large inertia external rotor permanent magnetic brushless DC electric machines, by setting outer rotor
It is calculated as spindle hollow cylinder, effectively increases the rotary inertia of motor；Also, stator core is free of in motor, therefore is turned
Son will not all generate core loss in any revolving speed in the stator, also reduce the volume and weight of motor；In addition, in motor
Without stator core tooth socket, the slot effect of conventional brushless DC motor can be eliminated, rotor torque is steady, is conducive to radiate,
It is lossless.
Detailed description of the invention
Fig. 1 is the sectional view of fusiform rotor in the specific embodiment of the invention；
Fig. 2 is the structure chart of rotor in the specific embodiment of the invention；
Fig. 3 is the schematic diagram of Halbach magnet in the specific embodiment of the invention；
Fig. 4 is the winding mode schematic diagram of stator winding in the specific embodiment of the invention；
Fig. 5 is the schematic diagram of motor in the specific embodiment of the invention.
Specific embodiment
Technical solution of the present invention is further introduced With reference to embodiment.
Present embodiment discloses a kind of large inertia external rotor permanent magnetic brushless DC electric machine, as shown in figure 5, including outer
Rotor 1, permanent magnet 2, the stator winding of non iron-core and stator skeleton 3；As depicted in figs. 1 and 2, outer rotor 1 is that spindle is empty
Heart cylindrical body, permanent magnet 2 are attached on the outer yoke inner wall of outer rotor 1, and stator winding is wound on stator skeleton 3.Stator winding uses ring
Oxygen resin is poured.It is opened up on stator skeleton 3 there are three slot, the radian between two neighboring slot is 120 °, is equipped with suddenly in slot
That sensor.Stator skeleton 3 is epoxide resin material.
Permanent magnet 2 includes 8 magnetic poles, and each magnetic pole includes 3 pieces of Halbach magnets, as shown in Figure 3.
When stator winding coiling around stator skeleton 3 using from inside to outside, from centre to two sides, layer-by-layer coiling by the way of,
Due to being limited by width of air gap, winding conducting wire can only at most arrange 5 layers, as shown in Figure 4.The line footpath D=of stator winding
0.6mm, using 10 strands and around the mode of 7 circle of coiling.
The rotary inertia of outer rotor 1 can be solved by segmentation and be calculated, rotary inertia J are as follows:
Wherein, ρ1For the density of material of outer rotor 1, h1For the axial length of outer rotor 1, h2It is thick for the end plate of outer rotor 1
Degree, h3For spindle height, Ro1For yoke exradius outside the iron core of outer rotor 1, Ri1For yoke inner circle outside the iron core of outer rotor 1 half
Diameter, Ro2For yoke exradius in the iron core of outer rotor 1, Ri2For yoke inner circle radius in the iron core of outer rotor 1, m1For yoke outside rotor
Quality, m2For the quality of yoke in rotor, m3For the quality on rotor chassis, m4For the quality of yoke spindle body portion outside rotor.
Claims (6)
1. a kind of large inertia external rotor permanent magnetic brushless DC electric machine, it is characterised in that: including outer rotor (1), permanent magnet (2), nothing
The stator winding and stator skeleton (3) of iron core；Outer rotor (1) is spindle hollow cylinder, and permanent magnet (2) is attached to outer rotor
(1) on outer yoke inner wall, stator winding is wound on stator skeleton (3).
2. large inertia external rotor permanent magnetic brushless DC electric machine according to claim 1, it is characterised in that: the stator winding
It is poured using epoxy resin.
3. large inertia external rotor permanent magnetic brushless DC electric machine according to claim 1, it is characterised in that: the stator skeleton
(3) it is opened up on there are three slot, the radian between two neighboring slot is 120 °, and Hall sensor is equipped in slot.
4. large inertia external rotor permanent magnetic brushless DC electric machine according to claim 1, it is characterised in that: the stator winding
When coiling around stator skeleton (3) using from inside to outside, from centre to two sides, layer-by-layer coiling by the way of.
5. large inertia external rotor permanent magnetic brushless DC electric machine according to claim 1, it is characterised in that: the permanent magnet
It (2) include 8 magnetic poles, each magnetic pole includes 3 pieces of Halbach magnets.
6. large inertia external rotor permanent magnetic brushless DC electric machine according to claim 1, it is characterised in that: the stator winding
Line footpath D=0.6mm, using 10 strands and around the mode of 7 circle of coiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810640826.2A CN108964308A (en) | 2018-06-21 | 2018-06-21 | A kind of large inertia external rotor permanent magnetic brushless DC electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810640826.2A CN108964308A (en) | 2018-06-21 | 2018-06-21 | A kind of large inertia external rotor permanent magnetic brushless DC electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108964308A true CN108964308A (en) | 2018-12-07 |
Family
ID=64491893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810640826.2A Pending CN108964308A (en) | 2018-06-21 | 2018-06-21 | A kind of large inertia external rotor permanent magnetic brushless DC electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108964308A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064658A (en) * | 2010-12-01 | 2011-05-18 | 北京奇峰聚能科技有限公司 | Brushless DC motor with high sinusoidal air gap magnetic density and low power consumption |
| CN202034879U (en) * | 2010-12-29 | 2011-11-09 | 北京奇峰聚能科技有限公司 | Inner and outer rotor brushless direct current motor with no iron core loss |
| CN103427512A (en) * | 2012-05-16 | 2013-12-04 | 三菱电机株式会社 | Magnet-type power generator and method of manufacturing the same |
| CN203632502U (en) * | 2013-12-26 | 2014-06-04 | 北京奇峰聚能科技有限公司 | Large-power coreless motor having heat conduction structure |
| CN206259765U (en) * | 2016-11-07 | 2017-06-16 | 中海油能源发展股份有限公司 | A kind of high speed non-stator iron core magneto of end portion leakage field |
-
2018
- 2018-06-21 CN CN201810640826.2A patent/CN108964308A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064658A (en) * | 2010-12-01 | 2011-05-18 | 北京奇峰聚能科技有限公司 | Brushless DC motor with high sinusoidal air gap magnetic density and low power consumption |
| CN202034879U (en) * | 2010-12-29 | 2011-11-09 | 北京奇峰聚能科技有限公司 | Inner and outer rotor brushless direct current motor with no iron core loss |
| CN103427512A (en) * | 2012-05-16 | 2013-12-04 | 三菱电机株式会社 | Magnet-type power generator and method of manufacturing the same |
| CN203632502U (en) * | 2013-12-26 | 2014-06-04 | 北京奇峰聚能科技有限公司 | Large-power coreless motor having heat conduction structure |
| CN206259765U (en) * | 2016-11-07 | 2017-06-16 | 中海油能源发展股份有限公司 | A kind of high speed non-stator iron core magneto of end portion leakage field |
Non-Patent Citations (1)
| Title |
|---|
| 洪延姬: "《临近空间飞行器技术》", 31 January 2012, 国防工业出版社 * |
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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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |
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| RJ01 | Rejection of invention patent application after publication |