CN103219852A - Built-in low-speed large-torque permanent magnetic hub motor - Google Patents
Built-in low-speed large-torque permanent magnetic hub motor Download PDFInfo
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- CN103219852A CN103219852A CN2013101350756A CN201310135075A CN103219852A CN 103219852 A CN103219852 A CN 103219852A CN 2013101350756 A CN2013101350756 A CN 2013101350756A CN 201310135075 A CN201310135075 A CN 201310135075A CN 103219852 A CN103219852 A CN 103219852A
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- 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
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Abstract
The invention relates to a built-in low-speed large-torque permanent magnetic hub motor comprising an outer rotor assembly, a stator iron core assembly and a motor shaft. The outer rotor assembly comprises an outer rotor shell body and at least four groups of permanent magnetic units. Each permanent magnetic unit comprises a first permanent magnet, a variable magnet and a second permanent magnet. A silicon steel septum is respectively arranged between the first permanent magnet and the variable magnet and between the variable magnet and the second permanent magnet. The stator iron core assembly comprises stator laminations, wherein the stator laminations are at least four groups in number and correspond to the permanent magnetic units in a one-to-one mode, and the end portions of the stator laminations are provided with stator windings. The built-in low-speed large-torque permanent magnetic hub motor is of a fully-sealed structure, is small in size, low in weight and large in specific power, has the precious advantages of being low in speed and large in torque, can provide a large start torque, meets loading characteristics of electric vehicles, and particularly meets acceleration requirements.
Description
Technical field
The invention belongs to the technical field of wheel hub motor, in particular, the present invention relates to a kind of built-in low speed large torque moment permanent-magnet wheel hub motor.
Background technology
Traditional direct driving motor mainly comprises magnetic gear external rotor, adjustable magnetic ring, magnetic gear internal rotor and motor stator, all has air gap between magnetic gear external rotor, adjustable magnetic ring, magnetic gear internal rotor and the motor stator; Not only simple in structure, and problem such as system noise sound pitch, mechanical wear.And the magneto of using always in the prior art, normally permanent magnet being mounted on the outer-rotor type wheel hub motor on the shell, its architectural feature is one group of external rotor permanent magnet body and corresponding laminated stator core assembly.But require in the application of super large torque low speed, especially built-in type permanent-magnet wheel hub motor, because size is limited, as the above-mentioned laminated stator core assembly that has only one group of external rotor permanent magnet body and one group of correspondence, is difficult to satisfy super large torque and low-speed performance requirement usually.
In the known technology, in order to satisfy the requirement of super large rotating speed and low speed, all need to adopt the mode of hydraulic motor and reducing gear train usually, have complex structure, fault is many, cost is high, and inconvenient maintenance.Outer-rotor permanent magnet motor is a kind of New-type electric machine that can realize the big rotating speed function of low speed of current appearance, it mainly comprises external rotor, external rotor permanent magnet body, magnetic flux Wehnelt electrode and internal stator, it is by the introducing of magnetic flux Wehnelt electrode on the stator, saved the adjustable magnetic ring structure in traditional magnetic gear, save internal rotor and adjustable magnetic ring structure independently in traditional magnetic gear, solved problems such as system noise sound pitch, mechanical wear.But the permanent magnetism vernier motor flux leakage of this structure is bigger, and core loss is bigger, and power is lower.
Summary of the invention
In order to solve the above-mentioned technical problem that exists in the prior art, the object of the present invention is to provide a kind of built-in low speed large torque moment permanent-magnet wheel hub motor.Low speed large torque moment permanent-magnet wheel hub motor of the present invention under the prerequisite that does not enlarge hub diameter, has been realized the requirement of big torque and low speed, can be used as built-in motor and uses.
In order to solve the problems of the technologies described above and realize above-mentioned purpose, the invention provides following technical scheme:
A kind of built-in low speed large torque moment permanent-magnet wheel hub motor, it comprises external rotor assembly, stator core assembly and motor shaft; Described external rotor assembly comprises outer rotor case, and described outer rotor case is arranged on the outside of stator core assembly, and described outer rotor case rear and front end is provided with front end housing and the rear end cap that is fastenedly connected with it; Offer at least 4 group grooves along the motor shaft direction on the inwall of described outer rotor case, and be provided with one group of permanent magnet unit in every group of groove; Described external rotor is connected with described motor shaft is rotating by bearing; Described outer rotor case is connected with motor shaft rotationally by bearing; Described permanent magnet unit comprises first permanent magnet, variable magnet and second permanent magnet, and described first permanent magnet and variable magnet are provided with the silicon steel partition between the variable magnet and second permanent magnet; Described stator core assembly comprises stator lasmination, described stator lasmination be at least 4 groups and with the corresponding one by one setting of described permanent magnet unit, the end of described stator lasmination is provided with stator winding.
Compared with prior art, the present invention has following beneficial effect: built-in low speed large torque moment permanent-magnet wheel hub motor of the present invention is a full-enclosed structure, can prevent that dust from entering motor internal, the reliability height, and motor volume is little, in light weight, specific power is big, weight reduction effectively, saving space.And motor external characteristic of the present invention is good, and the load characteristic, the especially motor that meet very much motor vehicle have valuable low speed high torque characteristic, and big detent torque can be provided, and satisfy the acceleration request of vehicle.
Description of drawings
Fig. 1 is the half sectional view of built-in low speed large torque moment permanent-magnet wheel hub motor of the present invention.
Embodiment
As shown in Figure 1, present embodiment relates to a kind of built-in low speed large torque moment permanent-magnet wheel hub motor, and it comprises external rotor assembly, stator core assembly and motor shaft; Described external rotor assembly comprises outer rotor case 10, and described outer rotor case 10 is arranged on the outside of stator core assembly, and described outer rotor case 10 rear and front ends are provided with front end housing 11 and the rear end cap 12 that is fastenedly connected with it; Offer 4 groups of grooves along the motor shaft direction on the inwall of described outer rotor case 10, and be provided with one group of permanent magnet unit 13 in every group of groove; Described external rotor is by bearing 20 and described 30 rotating connections of motor shaft; Described permanent magnet unit comprises first permanent magnet, variable magnet and second permanent magnet, and described first permanent magnet and variable magnet are provided with the silicon steel partition between the variable magnet and second permanent magnet; Described stator core assembly comprises stator lasmination 40, described stator lasmination be 4 groups and with the corresponding one by one setting of described permanent magnet unit, the end of described stator lasmination is provided with stator winding 42.Described in the present embodiment 4 groups of stator lasminations are unified the coiling stator winding; For the magneto of same diameter, the coil turn of motor has but increased by 4 times when current value equates, thereby can be so that this rotating speed of motor descends at double, and its torque significantly improves, and has realized the purpose of low speed and super large torque.
Described permanent magnet can be selected Nd-Fe-B permanent magnet, and as preferably, the component of Nd-Fe-B permanent magnet of the present invention comprises: the iron of neodymium 22wt%, gadolinium 1.5wt%, holmium 1.2wt%, boron 1.5wt%, copper 0.05wt%, cobalt 0.68wt% and surplus.Described Nd-Fe-B permanent magnet can adopt conventional method to prepare.
Described variable magnet is a Fe-Cr-Co class magnet well known in the prior art; As preferably, the variable magnet that uses among the present invention has the composition of representing with following composition: (Sm
0.8Nd
0.2) (Al
0.3Ti
0.08Co
0.52Cu
0.1)
7.2The coercive force of described variable magnet and has higher magnetic flux density between 250-280KA/h.After in motor, using above-mentioned variable magnet, can significantly reduce the disturbance of eddy current in each permanent magnet, reduce the eddy current loss in the external rotor permanent magnet body, improve the stability of motor.Variable magnet of the present invention can prepare by the following method: at first, in protective atmosphere, prepare described alloy powder by the ball milling machine-alloying; In metal pattern, fill above-mentioned alloy powder then, carry out press molding, thereby make the fixing press-powder body of crystallographic axis orientation of sening as an envoy to while apply magnetic field; Afterwards, under 1280 ℃, inert gas atmosphere condition, described press-powder body is carried out 3-5 hour sintering, thereby obtain fine and close sintered body; Carry out solutionizing heat treatment at 1120 ℃ then, the processing time is 1-2 hour; At last, carry out timeliness heat treatment under 780 ℃ condition, the processing time is 2-3 hour, and slowly cools to the cooling end temp in 350 ℃ the scope with 0.5～2 ℃/minute cooling rate, then utilizes the cold room temperature that is cooled to of stove.
Built-in low speed large torque moment permanent-magnet wheel hub motor of the present invention is a full-enclosed structure, the reliability height, and also motor volume is little, in light weight, specific power is big, meets very much the load characteristic of motor vehicle, especially motor has valuable low speed high torque characteristic, and big detent torque can be provided.
Claims (5)
1. built-in low speed large torque moment permanent-magnet wheel hub motor, it comprises external rotor assembly, stator core assembly and motor shaft; It is characterized in that: described external rotor assembly comprises outer rotor case, and described outer rotor case is arranged on the outside of stator core assembly, and described outer rotor case rear and front end is provided with front end housing and the rear end cap that is fastenedly connected with it; Offer at least 4 group grooves along the motor shaft direction on the inwall of described outer rotor case, and be provided with one group of permanent magnet unit in every group of groove; Described external rotor is connected with described motor shaft is rotating by bearing; Described outer rotor case is connected with motor shaft rotationally by bearing; Described permanent magnet unit comprises first permanent magnet, variable magnet and second permanent magnet, and described first permanent magnet and variable magnet are provided with the silicon steel partition between the variable magnet and second permanent magnet; Described stator core assembly comprises stator lasmination, described stator lasmination be at least 4 groups and with the corresponding one by one setting of described permanent magnet unit, the end of described stator lasmination is provided with stator winding.
2. built-in low speed large torque moment permanent-magnet wheel hub motor according to claim 1 is characterized in that: described permanent magnet is a Nd-Fe-B permanent magnet.
3. built-in low speed large torque moment permanent-magnet wheel hub motor according to claim 2, it is characterized in that: the component of described Nd-Fe-B permanent magnet comprises: the iron of neodymium 22wt%, gadolinium 1.5wt%, holmium 1.2wt%, boron 1.5wt%, copper 0.05wt%, cobalt 0.68wt% and surplus.
4. built-in low speed large torque moment permanent-magnet wheel hub motor according to claim 1 is characterized in that: described variable magnet is a Fe-Cr-Co class magnet.
5. built-in low speed large torque moment permanent-magnet wheel hub motor according to claim 4 is characterized in that: described variable magnet has the composition of representing with following composition: (Sm
0.8Nd
0.2) (Al
0.3Ti
0.08Co
0.52Cu
0.1)
7.2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101350756A CN103219852A (en) | 2013-04-18 | 2013-04-18 | Built-in low-speed large-torque permanent magnetic hub motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101350756A CN103219852A (en) | 2013-04-18 | 2013-04-18 | Built-in low-speed large-torque permanent magnetic hub motor |
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|---|---|
| CN103219852A true CN103219852A (en) | 2013-07-24 |
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|---|---|---|---|
| CN2013101350756A Pending CN103219852A (en) | 2013-04-18 | 2013-04-18 | Built-in low-speed large-torque permanent magnetic hub motor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006280195A (en) * | 2005-03-01 | 2006-10-12 | Toshiba Corp | Permanent magnet type rotary electric machine |
| CN201075805Y (en) * | 2007-08-04 | 2008-06-18 | 万德鸿 | Ultra large torque moment and low speed frequency conversion wheel hub motor |
| CN101485064A (en) * | 2006-06-12 | 2009-07-15 | 雷米技术有限公司 | Magnet for a dynamoelectric machine, dynamoelectric machine and method |
| CN102217170A (en) * | 2008-11-19 | 2011-10-12 | 株式会社东芝 | Permanent magnet type rotating electric machine |
| CN102420037A (en) * | 2010-09-24 | 2012-04-18 | 株式会社东芝 | Permanent magnet and motor and generator using the same |
-
2013
- 2013-04-18 CN CN2013101350756A patent/CN103219852A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006280195A (en) * | 2005-03-01 | 2006-10-12 | Toshiba Corp | Permanent magnet type rotary electric machine |
| CN101485064A (en) * | 2006-06-12 | 2009-07-15 | 雷米技术有限公司 | Magnet for a dynamoelectric machine, dynamoelectric machine and method |
| CN201075805Y (en) * | 2007-08-04 | 2008-06-18 | 万德鸿 | Ultra large torque moment and low speed frequency conversion wheel hub motor |
| CN102217170A (en) * | 2008-11-19 | 2011-10-12 | 株式会社东芝 | Permanent magnet type rotating electric machine |
| CN102420037A (en) * | 2010-09-24 | 2012-04-18 | 株式会社东芝 | Permanent magnet and motor and generator using the same |
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Application publication date: 20130724 |