CN202068244U - Ferrite three-segment three-phase permanent magnet motor - Google Patents
Ferrite three-segment three-phase permanent magnet motor Download PDFInfo
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- CN202068244U CN202068244U CN2011200632802U CN201120063280U CN202068244U CN 202068244 U CN202068244 U CN 202068244U CN 2011200632802 U CN2011200632802 U CN 2011200632802U CN 201120063280 U CN201120063280 U CN 201120063280U CN 202068244 U CN202068244 U CN 202068244U
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Abstract
The utility model relates to a ferrite three-segment three-phase permanent magnet motor, which aims to solve the problem that a conventional permanent magnet motor is high in cooper loss, high in cost, and the like. In the ferrite three-segment three-phase permanent magnet motor, a stator core is of a three-segment structure made by a soft magnetic ferrite, an A phase winding, a B phase winding and a C phase winding respectively take up one of the three segments, the tooth space number Z of the stator core and the pole pair number 2P of a rotor satisfy the relation that Z=2P=2X, wherein X satisfies the relation that X=5, 6, 7, ... 20, grooves used for the embedment of the windings are arranged at the back, forth, left and right of each tooth, each phase is provided with 2X concentrated windings, which are circularly arranged in a from A to virgule A mode, a B phase and a C phase are same in structure, and an A phase stator core, a B phase stator core and a C phase stator core mutually differ by an electric angle of 120 degrees in space phase. When being used as a motor, the ferrite three-segment three-phase permanent magnet motor can employ three-phase square wave or sine wave current drive, and has a plurality of advantages such as winding end portion is small, positioning moment is small, copper loss and iron loss are low, permanent magnet materials of the stator core and a rotor are low in cost, and the like.
Description
Technical field
The utility model relates to magneto, more particularly, relates to a kind of ferrite syllogic three-phase motor with permanent magnets, and this motor is applicable to refrigerator, air-conditioning and high-speed driving application.
Background technology
The stator core of magneto generally adopts silicon steel sheet, and rotor generally adopts rare-earth permanent magnet, for example Nd-Fe-B permanent magnet.Silicon steel sheet and rare-earth permanent magnet material are just more and more rare, and price is more and more expensive.In order to change this situation, people have done a lot of effort.
Wherein a kind of improvement project is to adopt the motor of no stator core, and this class design will inevitably increase the consumption of permanent magnet.
Another kind of improvement project is to adopt the hard ferrite magnet steel, can avoid using rare-earth permanent magnet material, but the magnetic loading step-down that must cause motor, can only correspondingly improve electric loading makes up, so essential copper consumption that increases, the copper loss of motor increases, and the more important thing is that therefore the energy index of motor can decline to a great extent.
The utility model content
At the above-mentioned defective of existing magneto, the utility model will solve problems such as traditional magneto copper loss is big, cost height.
The technical solution of the utility model is, ferrite syllogic three-phase motor with permanent magnets is provided, be equipped with many on the rotor core of described motor to permanent magnet, three phase windings are housed on the stator core, wherein, described stator core is the three stage structure of being made by soft magnetic ferrite, and A, B, C three phase windings respectively account for wherein one section; Permanent magnet in the described rotor core is made by hard ferrite, its number of magnetic poles 2P=2X, wherein X=5,6,7 ... 20; At first section stator core at A phase winding place, its teeth groove is counted Z=2X; Wherein the relation of the outer nose circle width M11 of each tooth, interior nose circle width M21, tooth degree not lend oneself to worry and anxiety M31 is M11＞M21＞M31; And the outer nose circle axial length M12 of each tooth, interior nose circle axial length M22, tooth axle are M12＞M32, M22＞M32 to the relation of length M 32; Thereby all be formed for the groove of setting-in winding in all around of tooth; A has 2X concentrated winding mutually, respectively on 2X tooth, and by A →/mode of A circulates and arranges, "/A " wherein represents the concentrated winding of an anti-phase connection of A phase; Second, third section stator core and the winding construction at described B, C phase winding place are mutually identical with A.
In the utility model, the physics air gap between described stator core and the rotor core can be 0.2～3.0mm; The width of the notch between adjacent two teeth is 0.1～3.0mm.
In each section stator core of the present utility model, the volume resistance of soft magnetic ferrite is 100 Ω～50K Ω, and is selected from a kind of in manganese core soft magnetic ferrite, nickel core soft magnetic ferrite, microcrystal silicon soft magnetic ferrite or the SMC soft-magnetic composite material.
In the preferred version of the present utility model, the described stator core of each section is spliced by 2X tooth independently, and wherein the remaining surface except splicing the surface all is insulated layer and coats, and the thickness of described insulating barrier is 0.02～0.5mm.In another preferred version of the present utility model, described stator core is to be prefabricated into whole integral structure.The described stator core of each section can be divided into multistage again vertically, and the front portion that is included in described tooth forms the leading portion of forward recess, forms the back segment of rearward recess and at least one interlude between described leading portion and back segment at the rear portion of described tooth.
In the utility model, evenly be provided with three micro-grooves on the interior circular arc of interior nose circle that also can described each tooth, the groove width of described micro-groove is 1～2mm, and groove depth is 0.3～2mm.
In the preferred version of the present utility model, the N of each permanent magnet, S magnetic pole are alternately on the described rotor core; Each described permanent magnet is watt shape hard ferrite magnet steel of radial magnetizing or watt shape hard ferrite magnet steel of parallel magnetization.
In another preferred version of the present utility model, described permanent magnet is the hard ferrite magnetic patch of radial magnetizing, and is flush-mounted in the surface of described rotor core; The pole span of each described magnetic patch is π D/2X, and axially physical size L is 30～200mm, and wherein D is a rotor diameter, and the outer chord length of magnetic patch is π D/2X, and the magnetic patch internal diameter is-π D/2Xn, wherein n=1～3.
In the utility model, carbon fiber, glass fiber or aluminium quality guarantee sheath that can be with a thickness on the cylindrical of described rotor core be 0.15～2mm.
Owing to taked technique scheme, three-phase motor with permanent magnets of the present utility model has that winding overhang minimizes, air gap minimizes, material minimizes, location torque minimizes and iron loss and copper loss such as minimize at series of advantages, have high workload rotating speed more, higher power/volume than and moment/volume ratio, cost has reached minimumization.This three-phase motor with permanent magnets can substitute existing induction motor, permanent magnet motor, perhaps substitutes air-conditioning and freezer compressor drive motors, becomes the main flow drive motors of following high-performance, energy-saving type air conditioner and freezer compressor.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is a motor general assembly structural representation in preferred embodiment of the utility model;
Fig. 2 is stator, the rotor structure schematic diagram of motor A phase in preferred embodiment of the utility model;
Fig. 3 is the front view of the single tooth shown in Fig. 2;
Fig. 4 is the left view of single tooth shown in Fig. 3;
Fig. 5 is the structural representation of watt shape hard ferrite magnet steel rotor in preferred embodiment of the utility model;
Fig. 6 is the rotor structure schematic diagram that the hard ferrite magnetic patch of radial magnetizing in preferred embodiment of the utility model constitutes;
Fig. 7 is the schematic diagram that micro-groove is set on the interior circular arc of tooth in another preferred embodiment of the utility model;
Fig. 8 further is divided into three sections schematic diagram vertically with every section stator core in preferred embodiment of the utility model.
Embodiment
Be illustrated in figure 1 as a preferred embodiment of the present utility model, the critical piece of this ferrite syllogic three-phase motor with permanent magnets comprises rotor 1, stator 2, rotating shaft 30 etc., and the physics air gap 5 between rotor 1 and the stator 2 is 0.1～2mm.Stator core wherein is the three stage structure of being made by soft magnetic ferrite, and A, B, C three phase windings respectively account for wherein first, second, third section;
Among the embodiment of back, get X=6, so Z=2P=2X=12 is arranged; During concrete enforcement, also desirable X=5,6,7 ... the arbitrary numerical value in 20.As shown in Figure 2, be that example describes mutually all in the description of back with A, first section stator core by 12 independently the tooth 40 made of soft magnetic ferrite be combined into, so the teeth groove of stator is counted Z=12.
As shown in Figure 3 and Figure 4, wherein the relation of the width M31 of the width M21 of the width M11 of the outer nose circle 50 of each tooth 40, interior nose circle 60, the tooth heart 70 is M11＞M21＞M31; And the relation of the axial length M32 of the axial length M12 of the outer nose circle 50 of each tooth, the axial length M22 of interior nose circle 60, the tooth heart 70 is M12＞M32, M22＞M32; Thereby the front and back groove, the left and right sides groove that axially and radially all are formed for placing winding at tooth; The benefit of this structure is that winding all is loaded in the groove, and desirable state is that winding can not protrude in the left and right sides end face among Fig. 3, and promptly the thickness of winding is defined in the left and right sides groove of tooth; Winding can not protrude in left and right sides end face among Fig. 4 yet simultaneously, and promptly the length of winding is defined in the front and back groove of tooth.
Wherein, A has 12 concentrated windings mutually, respectively on 12 teeth, the coiling connected mode of A phase winding be A →/A → A →/A → A →/A → A →/A → A →/A → A →/A.The concentrated winding of an anti-phase connection of "/A " expression A phase wherein.
Second, third section stator core and the winding construction at described B, C phase winding place are mutually identical with A, and 120 ° of electrical degrees of space phase mutual deviation of A, B, C threephase stator iron core.The coiling connected mode of B phase winding be B →/B → B →/B → B →/B → B →/B → B →/B → B →/B; The coiling connected mode of C phase winding be C →/C → C →/C → C →/C → C →/C → C →/C → C →/C.
Because front and back groove, left and right sides groove structure on each tooth, concentrate the winding outward flange all to be defined to stator core inside, compare with conventional motors, this motor has been saved a large amount of winding conducting wires, significantly reduce with copper with the iron amount, thereby have higher power/volume ratio, higher moment/volume ratio, cost has reached minimumization.
For the rotor axial L/D ratio is 1/2 12 utmost point motors, motor axial length L=D/2, and the every utmost point number of turn of motor N, then the total length of the every phase winding of motor is 12N (D+ л D/12), and the total length 12N of the every phase winding of conventional motors (D+2 л D/12); Therefore, winding conducting wire has shortened 1.207 times in the present embodiment.Wherein, rotor adopts hard ferrite, avoids using rare-earth permanent magnet material, though can cause the magnetic loading of motor to descend 2 times, need to improve 2 times of electric loadings and make motor performance up, but because the total length of winding shortens 1.207 times, the copper loss of motor can correspondingly reduce 1.458 times; Because the stator of motor adopts soft magnetic ferrite, and the iron loss of motor can reduce 3～10 times, therefore, the composite loss of this motor concentrates the winding three-phase magneto suitable with tradition, even littler again; Because the motor magnetic loading descends 2 times, so the location torque of motor and torque fluctuations concentrate winding electric machine little by about 20～30% than tradition, noise also concentrates winding electric machine little than tradition again; The copper consumption of motor reduces, and is more favourable to reducing the motor internal resistance.
Because stator core has adopted soft magnetic ferrite, operating frequency can allow motor with the tens thousand of speed rotations of walking around of per minute, for high-speed applications highly significant up to 10KHz.This motor can adopt three-phase square wave or sine-wave current to drive.
During concrete enforcement, in 12 teeth at each section stator core, the remaining surface except splicing the surface all is insulated layer and coats, and thickness of insulating layer can be 0.02～0.5mm, after being spliced into, the width of the notch 3 between adjacent two teeth is 0.1～3.0mm.Wherein, the volume resistance of soft magnetic ferrite can be 100 Ω～50K Ω, so the core loss of soft magnetic ferrite stator is littler 3～10 times even more than the silicon steel sheet stator core.The soft magnetic ferrite here can be a certain the making in manganese core soft magnetic ferrite, nickel core soft magnetic ferrite, microcrystal silicon soft magnetic ferrite or the SMC soft-magnetic composite material, the remanent magnetism magnetic that its saturation magnetic induction certainty can not be lower than permanent-magnet ferrite is close, and they are natural couplings.
For stator core shown in Figure 2, can adopt certain technology in sintering process, bonding process, injection technique, the hybrid technique to make one by one independent tooth, the winding that can connect forward or backwards this moment at each tooth coiling, and then be spliced into the stator core assembly of one section integral body.Among the embodiment as shown in Figure 7, evenly be provided with three micro-grooves on the interior circular arc of the interior nose circle of each tooth, its groove width is 1～2mm, and groove depth is 0.3～2mm.
Certainly, also can adopt integral prefabricated mode to make one section stator core (not having independently each tooth this moment), direct with flying shuttle or manual coiling three phase windings on the one-piece stator iron core then.
Among the embodiment as shown in Figure 5, on the rotor core N of each permanent magnet, S magnetic pole alternately, the permanent magnet here is watt shape hard ferrite magnet steel of radial magnetizing or watt shape hard ferrite magnet steel of parallel magnetization.As can be seen from the figure, the cylindrical both sides of ferrite magnetic steel have and are not more than the top rake that 15 °, length are not more than the cylindrical arc length 1/4 of ferrite magnetic steel, as Fig. 5.The direct axis reluctance of this rotor is identical with quadrature-axis reluctance, belongs to non salient pole machine, and the running noises of this motor is littler than salient pole machine.
Among the embodiment as shown in Figure 6, permanent magnet is the hard ferrite magnetic patch of radial magnetizing, the pole span π D/12 of this permanent magnet, axially physical size L is 30～200mm, and wherein D is a rotor diameter, and the outer chord length of magnetic patch is π D/12, the magnetic patch internal diameter is-π D/12n n=1～3.It shown in Fig. 6 the rotor that the hard ferrite magnetic patch by the radial magnetizing of n=1.25 constitutes.Permanent magnet shown in Figure 6, the direct axis reluctance of rotor is bigger than quadrature-axis reluctance, has saliency, can obtain salient pole moment during this motor operation, and it is bigger than non salient pole machine to exert oneself.
As shown in Figure 2, in the present embodiment, the protective sleeve that to be with a thickness on the cylindrical of rotor be 0.15～2mm, this protective sleeve can be made by carbon fiber, glass fiber or aluminium, can prevent when the motor high speed rotating that epitrochanterian permanent magnet centrifugal force is excessive and comes off.
As shown in Figure 8, another embodiment of the present utility model, each section stator core further is divided into three sections vertically, and the front portion that is included in tooth forms the leading portion (the left side section among Fig. 8) of forward recess, forms the back segment (the right side section among Fig. 8) of rearward recess and the interlude (interlude among Fig. 8) between leading portion and back segment at the rear portion of tooth.During concrete enforcement, the quantity of interlude can be one or more; When the length of present segment and back segment immobilizes, by increasing the quantity of interlude, the length of perhaps regulating interlude, the i.e. axial length of the whole stator core of scalable.The structure of this axial segmentation is spliced into the situation of stator core applicable to a plurality of teeth shown in Figure 2, be that each tooth in each section stator core is divided into multistage, shown in Fig. 8 is the left view structure of the single tooth corresponding with Fig. 4, and its front view structure as shown in Figure 3; Certainly, the structure of this axial segmentation is the integral prefabricated multistage of difference also applicable to integral prefabricated stator core at this moment.
Ferrite syllogic three-phase motor with permanent magnets in the foregoing description usually as motor, and adopts three-phase square wave or sine-wave current to drive; Be applicable to refrigerator, air-conditioning and high-speed driving application; When it is driven by rotating machinery, also can become three-phase permanent magnet electricity generator.
Claims (10)
1. ferrite syllogic three-phase motor with permanent magnets, be equipped with many on the rotor core of described motor (1) to permanent magnet (4), stator core is equipped with three phase windings on (2), it is characterized in that, described stator core is the three stage structure of being made by soft magnetic ferrite, and A, B, C three phase windings respectively account for wherein one section; Permanent magnet in the described rotor core is made by hard ferrite, its number of magnetic poles 2P=2X, wherein X=5,6,7 ... 20; At first section stator core at A phase winding place, its teeth groove is counted Z=2X; Wherein the relation of the outer nose circle width M11 of each tooth, interior nose circle width M21, tooth degree not lend oneself to worry and anxiety M31 is M11＞M21＞M31; And the outer nose circle axial length M12 of each tooth, interior nose circle axial length M22, tooth axle are M12＞M32, M22＞M32 to the relation of length M 32; Thereby all be formed for the groove of setting-in winding in all around of tooth; A has 2X concentrated winding mutually, respectively on 2X tooth, and by A →/mode of A circulates and arranges, "/A " wherein represents the concentrated winding of an anti-phase connection of A phase; Second, third section stator core and the winding construction at described B, C phase winding place are mutually identical with A, and 120 ° of electrical degrees of space phase mutual deviation of A, B, C threephase stator iron core.
2. ferrite syllogic three-phase motor with permanent magnets according to claim 1 is characterized in that the physics air gap between described stator core and the rotor core is 0.2～3.0mm; The width of the notch (3) between adjacent two teeth is 0.1～3.0mm; Carbon fiber, glass fiber or aluminium quality guarantee sheath that to be with a thickness on the cylindrical of described rotor core be 0.15～2mm.
3. ferrite syllogic three-phase motor with permanent magnets according to claim 1, it is characterized in that, the volume resistance of described soft magnetic ferrite is 100 Ω～50K Ω, and is selected from a kind of in manganese core soft magnetic ferrite, nickel core soft magnetic ferrite, microcrystal silicon soft magnetic ferrite or the SMC soft-magnetic composite material.
4. ferrite syllogic three-phase motor with permanent magnets according to claim 1, it is characterized in that, the described stator core of each section is spliced by 2X tooth independently, and wherein the remaining surface except splicing the surface all is insulated layer and coats, and the thickness of described insulating barrier is 0.02～0.5mm.
5. ferrite syllogic three-phase motor with permanent magnets according to claim 1 is characterized in that, the described stator core of each section is to be prefabricated into whole integral structure, and its surface all is insulated layer and coats, and the thickness of described insulating barrier is 0.02～0.5mm.
6. according to each described ferrite syllogic three-phase motor with permanent magnets among the claim 1-5, it is characterized in that the N of each permanent magnet, S magnetic pole are alternately on the described rotor core; Each described permanent magnet is watt shape hard ferrite magnet steel of radial magnetizing or watt shape hard ferrite magnet steel of parallel magnetization.
7. ferrite syllogic three-phase motor with permanent magnets according to claim 6 is characterized in that, the cylindrical both sides of described ferrite magnetic steel are provided with and are not more than the top rake that 15 °, length are not more than the cylindrical arc length 1/4 of ferrite magnetic steel.
8. according to each described ferrite syllogic three-phase motor with permanent magnets among the claim 1-5, it is characterized in that described permanent magnet is the hard ferrite magnetic patch of radial magnetizing, and be flush-mounted in the surface of described rotor core; The pole span of each described magnetic patch is π D/2X, and axially physical size L is 30～200mm, and wherein D is a rotor diameter, and the outer chord length of magnetic patch is π D/2X, and the magnetic patch internal diameter is-π D/2Xn, wherein n=1～3.
9. according to each described ferrite syllogic three-phase motor with permanent magnets among the claim 1-5, it is characterized in that evenly be provided with three micro-grooves on the interior circular arc of the interior nose circle of described each tooth, the groove width of described micro-groove is 1～2mm, groove depth is 0.3～2mm.
10. according to each described ferrite syllogic three-phase motor with permanent magnets among the claim 1-5, it is characterized in that, the described stator core of each section is divided into multistage vertically again, and the front portion that is included in described tooth forms the leading portion of forward recess, forms the back segment of rearward recess and at least one interlude between described leading portion and back segment at the rear portion of described tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200632802U CN202068244U (en) | 2011-03-11 | 2011-03-11 | Ferrite three-segment three-phase permanent magnet motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200632802U CN202068244U (en) | 2011-03-11 | 2011-03-11 | Ferrite three-segment three-phase permanent magnet motor |
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| CN202068244U true CN202068244U (en) | 2011-12-07 |
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| CN2011200632802U Expired - Lifetime CN202068244U (en) | 2011-03-11 | 2011-03-11 | Ferrite three-segment three-phase permanent magnet motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103222154A (en) * | 2011-03-10 | 2013-07-24 | 浙江博望科技发展有限公司 | Ferrite three-section three-phase permanent magnet motor |
| WO2014183408A1 (en) | 2013-05-13 | 2014-11-20 | Guangdong Welling Motor Manufacturing Co., Ltd. | Permanent magnet motor |
| CN109286293A (en) * | 2017-07-21 | 2019-01-29 | 深圳市配天电机技术有限公司 | The manufacturing method of electric vehicle, wheel, switched reluctance machines and its iron core |
| CN109361275A (en) * | 2018-11-23 | 2019-02-19 | 南京康尼电子科技有限公司 | A kind of high-performance permanent magnet motor reducing short-circuit torque |
| US11894755B2 (en) | 2021-08-25 | 2024-02-06 | Milwaukee Electric Tool Corporation | Electric motor having segmented stator |
-
2011
- 2011-03-11 CN CN2011200632802U patent/CN202068244U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103222154A (en) * | 2011-03-10 | 2013-07-24 | 浙江博望科技发展有限公司 | Ferrite three-section three-phase permanent magnet motor |
| WO2014183408A1 (en) | 2013-05-13 | 2014-11-20 | Guangdong Welling Motor Manufacturing Co., Ltd. | Permanent magnet motor |
| CN109286293A (en) * | 2017-07-21 | 2019-01-29 | 深圳市配天电机技术有限公司 | The manufacturing method of electric vehicle, wheel, switched reluctance machines and its iron core |
| CN109361275A (en) * | 2018-11-23 | 2019-02-19 | 南京康尼电子科技有限公司 | A kind of high-performance permanent magnet motor reducing short-circuit torque |
| US11894755B2 (en) | 2021-08-25 | 2024-02-06 | Milwaukee Electric Tool Corporation | Electric motor having segmented stator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20111207 |