CN104242516A - Brushless permanent-magnet motor - Google Patents
Brushless permanent-magnet motor Download PDFInfo
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- CN104242516A CN104242516A CN201310227497.6A CN201310227497A CN104242516A CN 104242516 A CN104242516 A CN 104242516A CN 201310227497 A CN201310227497 A CN 201310227497A CN 104242516 A CN104242516 A CN 104242516A
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- rotor
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- brushless permanent
- permanent magnet
- magnet motor
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Abstract
A brushless permanent-magnet motor comprises a stator, a rotor, a magnet set and two fixed boards; wherein the rotor is coaxial with the stator and is rotatably arranged in the stator. The magnet set is composed of a plurality of magnet units. The magnet units are annularly arranged at the circumference of the rotor and a gap is arranged between the magnet units and the stator. The two fixed boards are made of magnet-conductive material and are respectively arranged at two end surfaces of the rotor fixedly. Therefore, the brushless permanent magnet motor has a stable structure and can effectively enlarge an air gap magnetic flux intensity and an electromagnetic torque under a rated rotating speed, thereby improving an integral efficiency.
Description
Technical field
The invention relates to a kind of brushless permanent magnet motor, refer to a kind of brushless permanent magnet motor with two fixed plate structures especially, its stabilized structure, and effectively can increase the electromagnetic torque under air gap flux density and rated speed, to promote whole efficiency.
Background technology
Compared with conventional motor, brush-less permanent magnetic reaches and has higher efficiency and torque density, is also therefore widely used in various drive system, such as: marine propeller, and weeder, tractor etc.Its known brushless permanent magnet motor 50 as shown in Figure 1, by a stator 51, a plurality of magnet unit 52 and a rotor 53 formed, wherein stator 51 is provided with a plurality of teeth portion 54 in inner peripheral edge surfaces, and between each teeth portion 54, there is a plurality of stator slot 55, can winding around in each teeth portion 54, and the periphery of rotor 53 is equiped with a plurality of interconnected and magnet unit 52 of tool opposed polarity adjacent one another are, and each magnet unit 52 has a gap with the teeth portion 54 of stator 51, when passing into a direct current in coil, namely a rotating magnetic field is produced corresponding to each magnet unit 52 be arranged on rotor 53, with this, this rotor 53 is rotated.
But, when known brushless permanent magnet motor 50 produces high heat because of electric energy and kinetic energy in transfer process, namely the viscose be coated between the outer peripheral edges face of rotor 53 and magnet unit 52 can produce rotten, magnet unit of a specified duration and of a specified duration then may make it depart from rotor 53 because of high-revolving centrifugal force, causes motor 50 to damage and loses effect; Again because of the structure of a plurality of teeth portion 54 of stator 51 tool of known brushless permanent magnet motor 50, and each teeth portion 54 adjacent is formed with a less gap, therefore when coil pass into direct current produce a rotating magnetic field time, the magnetic flux density in the gap of each teeth portion 54 is by higher than the side of teeth portion 54 towards magnet unit 52, now, when the vertical section that each magnet unit 52 is connected is by gap that each teeth portion 54 is adjacent, the magnetic flux of rotor 53 cannot import stator 51 fifty-fifty, and air gap flux density is reduced and whole efficiency decline.
To sum up institute is old, and known structure still has air gap flux density is low and whole efficiency is not good disappearance and haves much room for improvement.
Summary of the invention
The object of the present invention is to provide a kind of brushless permanent magnet motor, its stabilized structure, and effectively can increase the electromagnetic torque under air gap flux density and rated speed, to promote whole efficiency.
For achieving the above object, brushless permanent magnet motor provided by the invention includes a stator, a rotor, a group of magnets and two fixed heads, wherein this rotor and this stator are coaxially and be located in this stator rotationally, and this group of magnets is made up of a plurality of magnet unit, respectively this magnet unit is located on the periphery of this rotor and is a gap with this stator, and respectively this fixed head is fixedly arranged on the biend of this rotor respectively.
Wherein this rotor includes the perforation of this rotor biend of a plurality of connection, and respectively this fixed head is provided with plurality of through holes in the relative position of each this perforation, and respectively this perforation can be positioned respectively this through hole, does synchronous running for each this fixed head relative to this rotor.
Wherein respectively this perforation and each this through hole arrange in the form of a ring equally spacedly along the central shaft of this rotor.
Wherein respectively this fixed head includes an outer peripheral edges face and a plurality of caulking grooves arranged along this outer peripheral edges face, is embedded in respectively in this caulking groove for each this magnet unit.
Wherein respectively this caulking groove sequentially has one first accommodation space and one second accommodation space by this rotor towards the direction of this stator, and the volume of this first accommodation space is greater than this second accommodation space.
Wherein respectively this magnet unit has an extrados, an intrados and two side faces respectively, and wherein respectively this side this intrados part contiguous is respectively equipped with a flange, is embedded in first, second accommodation space of respectively this caulking groove for each this magnet unit.
Wherein this rotor includes plurality of channels, and respectively this channel coaxial is located at the periphery of this rotor to ground.
Wherein respectively this passage is central shaft along this rotor and arranges equally spacedly in the form of a ring.
Wherein this stator includes an inner peripheral edge surfaces, a plurality of teeth portion arranged along this inner peripheral edge surfaces, and in respectively forming a plurality of stator slot between this teeth portion, can be positioned at respectively this stator slot for coil winding in each this teeth portion, respectively this teeth portion has a leading section away from one end of this inner peripheral edge surfaces.
Thus, the present invention utilizes the structure of respectively this fixed head to be incorporated on this rotor securely by each this magnet unit, make motor in rotation process, respectively this magnet unit can not lose efficacy because of centrifugal force and viscose and depart from this rotor, in addition, respectively this fixed head is a permeability magnetic material, so makes the magnetic flux of this rotor can import this stator more fifty-fifty, to reach the electromagnetic torque promoted under air gap flux density and rated speed, relatively promote the efficiency of motor entirety.
Accompanying drawing explanation
Fig. 1 is the generalized section of known brushless permanent magnet motor.
Fig. 2 is the generalized section of the brushless permanent magnet motor of the present invention first preferred embodiment, the relative position after each assembled of main display.
Fig. 3 is the three-dimensional exploded view of the brushless permanent magnet motor of this first preferred embodiment of the present invention.
Fig. 4 is the generalized section of the brushless permanent magnet motor of the present invention second preferred embodiment, the relative position after each assembled of main display.
Fig. 5 is the three-dimensional exploded view of the brushless permanent magnet motor of this second preferred embodiment of the present invention.
Fig. 6 is the generalized section of the brushless permanent magnet motor of the present invention the 3rd preferred embodiment, the relative position after each assembled of main display.
Fig. 7 is the three-dimensional exploded view of the brushless permanent magnet motor of the present invention the 3rd preferred embodiment.
Fig. 8 is the air gap flux density curve comparison diagram of the brushless permanent magnet motor of the present invention the 3rd preferred embodiment.
Fig. 9 is the electromagnetic torque curve comparison diagram of brushless permanent magnet motor under rated speed of the above-mentioned three kinds of patterns of the present invention.
Primary clustering symbol description in accompanying drawing:
1-3 brushless permanent magnet motor, 10 stators, 11 inner peripheral edge surfaces, 13 teeth portion, 15 stator slots, 17 leading sections, 20 rotors, 21 perforations, 23 passages, 30 group of magnets, 31 magnet units, 311 extrados, 313 intrados, 315 sides, 317 flanges, 40 fixed heads, 41 outer peripheral edges faces, 43 caulking grooves, 431 first accommodation spaces, 433 second accommodation spaces, 45 through holes, 50 brushless permanent magnet motors, 51 stators, 52 magnet units, 53 rotors, 54 teeth portion, 55 stator slots.
Embodiment
For formation of the present invention can be understood further, feature and object thereof, below for some embodiments of the present invention, and coordinate accompanying drawing to be described in detail as follows, allow simultaneously and be familiar with this those skilled in the art and can specifically implement, only the following stated, only in order to technology contents of the present invention and feature being described and the execution mode provided, all have commonly knowledge in field of the present invention, after understanding technology contents of the present invention and feature, with without prejudice under spirit of the present invention, all simple modifications for it, the economization of replacement or component, all should belong to the category that the invention is intended to protect.
Referring to shown in Fig. 2, is the brushless permanent magnet motor 1 of the present invention first preferred embodiment, and it includes stator 10, rotor 20, group of magnets 30 and two fixed heads 40.
This stator 10 includes a plurality of teeth portion 13 that an inner peripheral edge surfaces 11, is arranged along this inner peripheral edge surfaces 11, and in respectively forming a plurality of stator slot 15 between this teeth portion 13, can be positioned at respectively this stator slot 15 for coil winding in each this teeth portion 13, respectively this teeth portion 13 has a leading section 17 away from one end of this inner peripheral edge surfaces 11.
This rotor 20 and this stator 10 are coaxially and be located at rotationally in this stator 10.
This group of magnets 30 is made up of a plurality of magnet unit 31, respectively this magnet unit 31 has extrados 311, intrados 313 and a two side faces 315 respectively, wherein respectively the intrados 313 of this magnet unit 31 is fitted respectively and is located on the periphery of this rotor 20, and respectively the extrados 311 of this magnet unit 31 is formed with a gap respectively with the leading section 17 of this stator 10, respectively this side 315 this intrados 313 part contiguous is respectively equipped with a flange 317.
Respectively this fixed head 40 is permeability magnetic material, and respectively this fixed head 40 is fixedly arranged on the biend up and down of this rotor 20 respectively, and can for this group of magnets 30 and this rotor 20 run-in synchronism, and respectively this fixed head 40 includes an outer peripheral edges face 41 and a plurality of caulking grooves 43 arranged along this outer peripheral edges face 41, be embedded in respectively in this caulking groove 43 for each this magnet unit 31.Respectively this caulking groove 43 sequentially has one first accommodation space 431 and one second accommodation space 433 by this rotor 20 towards the direction of this stator 10, the volume of this first accommodation space 431 is greater than this second accommodation space 433, thus, respectively this magnet unit 31 can pass through the structure of this flange 317 and is embedded in first, second accommodation space 431,433 of respectively this caulking groove 43.Thus, the present invention can avoid when brushless permanent magnet motor 2 is because of in conversion process of energy in this rotor 20 and this group of magnets 30 through the flush structure of each this fixed head 40, energy loss and produce high heat, the viscose be coated between the outer peripheral edges of this rotor 20 and the intrados 313 of this group of magnets 30 is produced rotten, in the course of time, this group of magnets 30 may make respectively this magnet unit 31 depart from this rotor 20 because of high-revolving centrifugal force, causes brushless permanent magnet motor 1 damage and lose effect.
Shown in Fig. 4, for the brushless permanent magnet motor 2 of the present invention second preferred embodiment, wherein this second preferred embodiment is roughly the same with the structure of this first preferred embodiment, its difference is that this rotor 20 includes the perforation 21 of this rotor about 20 biend of a plurality of connection, and respectively this fixed head 40 is provided with plurality of through holes 45 in the relative position of each this perforation 21, respectively this perforation 21 can utilize riveted mode and each this through hole 45 to do mutual location, synchronous running is done for each this fixed head 40 this rotor 20 relative, and respectively this perforation 21 and each this through hole 45 are central shafts along this rotor 20 and arrange equally spacedly in the form of a ring.Thus, respectively this perforation 21 and each this through hole 45 not only can reach the use that mutual positioning synchronous operate, and can strengthen the structural strength of rotor 20, more can form a magnetic force open circuit and make magnetic flux density concentrated.
Shown in Fig. 6, for the brushless permanent magnet motor 3 of the present invention the 3rd preferred embodiment, wherein the structure of the 3rd first, second preferred embodiment of preferred embodiment and this is roughly the same, its difference is that this rotor 20 includes plurality of channels 23, respectively this passage 23 is located at the periphery of this rotor 20 coaxially, and respectively this passage 23 is central shafts along this rotor 20 and arranges equally spacedly in the form of a ring, makes the running of motor 3 more efficient with this.
In order to more clearly state effect of the present invention, referring again to Fig. 8 and Fig. 9, for the brushless permanent magnet motor 1 of aforementioned three kinds of different types, 2, the comparison diagram of 3, as the air gap flux density curve comparison diagram that Fig. 8 is each this preferred embodiment of the present invention, by learn in figure this first, second, the air gap flux density of the 3rd preferred embodiment is respectively 0.7649Tesla, 0.7952Tesla, 0.8002Tesla, especially with this second, 3rd preferred embodiment levels off in a tapered rising and decline curve especially, again as shown in Figure 9, for the present invention's respectively electromagnetic torque curve comparison diagram of this preferred embodiment under a rated speed, by learn in figure this first, second, the mean value of the electromagnetic torque of the 3rd preferred embodiment is respectively 1.7690N-m, 1.9419N-m, 1.9411N-m.Comprehensive above-mentioned data and the graphic the present invention of discovery pass through the magnetic conduction effect of respectively this fixed head 40, make the magnetic flux of this rotor 20 can import this stator 10 more fifty-fifty, to reach the object of the electromagnetic torque promoted under air gap flux density and rated speed, relatively promote the efficiency of motor entirety.
In gross, brushless permanent magnet motor of the present invention has following advantage:
1) the present invention utilizes caulking groove 43 structure of respectively this fixed head 40, can be embedded in corresponding caulking groove 43 for each this magnet unit 31, avoid brushless permanent magnet motor under long-term high heat, high-revolving situation with this, allow respectively this magnet unit 31 depart from this rotor 20 because viscose is rotten, cause motor damage and lose effect.
2) each fixed head 40 of the present invention is a permeability magnetic material, makes the magnetic flux of this rotor 20 can import this stator 10 more fifty-fifty with this, to reach the object of the electromagnetic torque promoted under air gap flux density and rated speed, and promotes the efficiency of motor entirety.
The constituent components that the present invention discloses in previous embodiment, is only and illustrates, is not used for limiting the scope of the invention, substituting or change of other equivalent elements, and the power power claimed range that also should be the present patent application contained.
Claims (9)
1. a brushless permanent magnet motor, includes:
One stator;
One rotor, with this stator coaxially and be located in this stator rotationally;
One group of magnets, is made up of a plurality of magnet unit, respectively this magnet unit be located on this rotor periphery and with this stator tool one gap; And
Two fixed heads be permeability magnetic material, and respectively this fixed head are fixedly arranged on the biend of this rotor respectively.
2. brushless permanent magnet motor according to claim 1, wherein, this rotor includes the perforation of this rotor biend of a plurality of connection, and respectively this fixed head is provided with plurality of through holes in the relative position of each this perforation, respectively this perforation can be positioned respectively this through hole, does synchronous running for each this fixed head relative to this rotor.
3. brushless permanent magnet motor according to claim 2, wherein, respectively this perforation and each this through hole are central shafts along this rotor and arrange equally spacedly in the form of a ring.
4. brushless permanent magnet motor according to claim 1, wherein, respectively this fixed head includes an outer peripheral edges face and a plurality of caulking grooves arranged along this outer peripheral edges face, is embedded in respectively in this caulking groove for each this magnet unit.
5. brushless permanent magnet motor according to claim 4, wherein, respectively this caulking groove sequentially has one first accommodation space and one second accommodation space by this rotor towards the direction of this stator, and the volume of this first accommodation space is greater than this second accommodation space.
6. brushless permanent magnet motor according to claim 5, wherein, respectively this magnet unit has an extrados, an intrados and two side faces respectively, wherein respectively this side this intrados part contiguous is respectively equipped with a flange, is embedded in first, second accommodation space of respectively this caulking groove for each this magnet unit.
7. the brushless permanent magnet motor according to claim 1,2 or 4, wherein, this rotor includes plurality of channels, and respectively this channel coaxial is located at the periphery of this rotor to ground.
8. brushless permanent magnet motor according to claim 7, wherein, respectively this passage is central shaft along this rotor and arranges equally spacedly in the form of a ring.
9. brushless permanent magnet motor according to claim 1, wherein, this stator includes an inner peripheral edge surfaces, a plurality of teeth portion arranged along this inner peripheral edge surfaces, and in respectively forming a plurality of stator slot between this teeth portion, can be positioned at respectively this stator slot for coil winding in each this teeth portion, respectively this teeth portion has a leading section away from one end of this inner peripheral edge surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310227497.6A CN104242516A (en) | 2013-06-07 | 2013-06-07 | Brushless permanent-magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310227497.6A CN104242516A (en) | 2013-06-07 | 2013-06-07 | Brushless permanent-magnet motor |
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| Publication Number | Publication Date |
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| CN104242516A true CN104242516A (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310227497.6A Pending CN104242516A (en) | 2013-06-07 | 2013-06-07 | Brushless permanent-magnet motor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030230948A1 (en) * | 2000-09-01 | 2003-12-18 | Hiroshi Murakami | Motor and method for manufacturing the same |
| CN101350537A (en) * | 2008-08-01 | 2009-01-21 | 崇贸科技股份有限公司 | End cap board and motor rotor containing the same |
| CN201937359U (en) * | 2011-02-28 | 2011-08-17 | 中山大洋电机制造有限公司 | Rotor component |
| CN102570659A (en) * | 2010-11-01 | 2012-07-11 | 本田技研工业株式会社 | Rotor of rotary electric machine |
| CN102647066A (en) * | 2012-04-21 | 2012-08-22 | 山东理工大学 | Electromagnetism and biradial permanent magnet mixed excitation generator |
| CN103095008A (en) * | 2011-10-27 | 2013-05-08 | 崔永兴 | Permanent magnet motor rotor fixedly arranged on end portions of magnetic shoe |
-
2013
- 2013-06-07 CN CN201310227497.6A patent/CN104242516A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030230948A1 (en) * | 2000-09-01 | 2003-12-18 | Hiroshi Murakami | Motor and method for manufacturing the same |
| CN101350537A (en) * | 2008-08-01 | 2009-01-21 | 崇贸科技股份有限公司 | End cap board and motor rotor containing the same |
| CN102570659A (en) * | 2010-11-01 | 2012-07-11 | 本田技研工业株式会社 | Rotor of rotary electric machine |
| CN201937359U (en) * | 2011-02-28 | 2011-08-17 | 中山大洋电机制造有限公司 | Rotor component |
| CN103095008A (en) * | 2011-10-27 | 2013-05-08 | 崔永兴 | Permanent magnet motor rotor fixedly arranged on end portions of magnetic shoe |
| CN102647066A (en) * | 2012-04-21 | 2012-08-22 | 山东理工大学 | Electromagnetism and biradial permanent magnet mixed excitation generator |
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Application publication date: 20141224 |
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