CN202085046U - Axial field permanent magnet brushless motor with smooth torque output - Google Patents
Axial field permanent magnet brushless motor with smooth torque output Download PDFInfo
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- CN202085046U CN202085046U CN2011202019199U CN201120201919U CN202085046U CN 202085046 U CN202085046 U CN 202085046U CN 2011202019199 U CN2011202019199 U CN 2011202019199U CN 201120201919 U CN201120201919 U CN 201120201919U CN 202085046 U CN202085046 U CN 202085046U
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Abstract
The utility model discloses an axial magnetic field permanent magnetic brushless motor for smooth torque output, which belongs to the field of axial magnetic field permanent magnetic motors. The motor is a double-silent motor, a rotor and a stator respectively have a silent structure, a double air gap permanent magnetic motor consists of two stators and a rotor (2), a first stator (1), a second stator (2) and the rotor (2) are installed coaxially, the rotor (2) is clamped between the two stators, air gaps with certain thickness are reserved among the rotor (2) and the two stators, and the rotor (2) is not provided with a permanent magnet and a winding, thus being simple and reliable in structure; each stator consists of six double teeth U-shaped stator iron cores (5), six permanent magnets (4) and six coils (3), and the permanent magnets on the stator are used for alternating magnetizing along the circumferential direction; and under the condition that teeth of the stator are identical, the motor with the same specification adopting the structure greatly reduces the quantity demand on the permanent magnet, so that the material cost and the production cost for manufacturing the motor are greatly lowered.
Description
Technical field
The utility model relates to a kind of axial magnetic field stator permanent magnet motor of low torque ripple, is to the improvement of traditional form axial magnetic field stator permanent magnet motor, belongs to the axial magnetic field permanent magnet technical field of motors.
Background technology
In order to improve the reliability of drive system, eliminate unnecessary middle transmission link (for example gear box, biography speed belt etc.), the demand of big torque, wide range speed control direct driving motor is constantly increased.Permanent magnetic brushless is applicable to this occasion because of himself high power density, high torque density and higher efficiency very much.
Axial magnetic field stator permanent magnet motor is a biconvex utmost point topological structure, and its permanent magnet and armature winding all are positioned on the stator, and this permanent magnet that has solved rotor permanent-magnet type magneto is well fixed and the too high and problems such as permanent magnet irreversible demagnetization that cause of temperature.Magnetic linkage and counter potential waveform that magnetic flux switches the stator permanent magnet motor are bipolarity, are a kind of bipolarity motors, and its back electromotive-force constant is big, the operational efficiency height.Simultaneously, magnetic flux switches the distinct advantages that the stator permanent magnet motor also has the winding complementarity, adopt concentrated winding and straight trough rotor even guarantee motor, total the percent harmonic distortion of its unloaded back electromotive force is also very little, this just makes magnetic flux switch the stator permanent magnet motor and is more suitable for the brushless ac operation.Axial magnetic field stator permanent magnet motor, except advantage with general magnetic flux switching stator permanent magnetic type electric and motor in axial magnetic field, its smaller volume makes the power density of motor and torque density higher, thin type structure has shortened the motor main magnetic circuit greatly, the weak magnetism speed expansion ability is stronger, and speed adjustable range is wideer.
Low torque ripple axial magnetic field stator permanent magnet motor is the improvement to conventional axial magnetic field stator permanent magnet electric machine structure.This motor promotes the torque capacity of motor by adopting the method that increases the rotor number of poles, and reduces torque pulsation.Low torque ripple motor after the improvement is very suitable in the straight drive system of the slow-speed of revolution, big torque application scenarios such as (for example) wind power generations.
Summary of the invention
Technical problem: the purpose of this utility model is to improve the torque characteristics that magnetic flux switches the stator permanent magnet motor, proposes a kind of axial magnetic field permanent magnet brushless electric machine of smooth torque output.This motor is the improvement to the conventional motors structure, not increasing motor volume, additionally not changing on the basis of electric machine structure form, reduce the torque pulsation of motor, make the drive characteristic of motor more steady, improve the torque density of motor simultaneously, and reduce the consumption of permanent magnet in the motor manufacturing.
Technical scheme: the axial magnetic field permanent magnet brushless electric machine of smooth torque output of the present utility model comprises rotor and is positioned at first stator, second stator of rotor both sides;
Each stator is made of armature winding in 6 bidentate U-iron cores, 6 fan-shaped permanent magnets and 6 three-phase set, and respectively there are two teeth on the both sides of each bidentate U-shaped stator core, and promptly each bidentate U-iron core unit has 4 teeth; Insert a fan-shaped permanent magnet between per two bidentate U-iron cores, armature coil is on the tooth of two bidentate U-iron cores; Stator is alternately placed assembled by bidentate U-shaped stator core and fan-shaped permanent magnet, the magnetizing direction of corresponding fan-shaped permanent magnet is opposite on two stators; The direction of magnetization of adjacent permanent magnet is opposite on the same stator, and along the circumference cutting orientation magnetizing;
Two radially relative armature coils belong to same phase, and with its connection in sequential series, the first centralized armature coil, the second centralized armature coil position are relative, and two armature coils backs in sequential series are constituted A phase armature winding; The 3rd centralized armature coil, the 4th centralized armature coil position are relative, and two coils backs in sequential series constitute B phase armature winding; The 5th centralized armature coil, the 6th centralized armature coil position are relative, and two coils backs in sequential series constitute C phase armature winding, just form A phase, B phase, C this threephase armature winding mutually like this on first stator; In like manner, the 7th relative centralized armature coil of position is connected in series with the 8th centralized armature coil and constitutes A armature winding mutually on second stator, the 9th relative centralized armature coil of position is connected in series with the tenth centralized armature coil and constitutes B armature winding mutually, and the 11 relative centralized armature coil of position is connected in series with the 12 centralized armature coil and constitutes C armature winding mutually; A phase on two stators, B phase, C phase armature winding serial or parallel connection are connected and composed A phase, B phase, the C phase armature winding of whole motor.
Rotor is a salient-pole structure, have 19 teeth, be called 19 rotor poles, each rotor pole is the sector shape, rotor pole is equally distributed on the excircle of non-magnetic conduction annulus of rotor, the axial length of rotor pole equates with the axial length of non-magnetic conduction annulus, and had not both had permanent magnet on the rotor and also do not had winding.
The tooth of bidentate U-iron core and groove all are fan-shaped, fan-shaped consistent with rotor pole.
This motor stator form by 6 bidentate U-shaped stator cores and 6 fan-shaped permanent magnets, rotor is made up of 19 rotor poles and non-magnetic conduction annulus, rotor pole is embedded on the non-magnetic conduction annulus and constitutes basic motor; Stator unit, the rotor pole of basic motor are carried out the integral multiple expansion, can obtain stator 2 * 12 grooves/rotor 19 utmost points, stator 2 * 24 grooves/rotor 38 utmost points, stator 2 * 36 grooves/rotor 57 utmost points ... structural electromotor.
Beneficial effect:
The axial magnetic field permanent magnet brushless electric machine of the smooth torque output that l, the utility model proposed, both kept the advantage that traditional magnetic flux switches the stator permanent magnet motor, greatly improved the torque density of motor again, reduce the torque pulsation of motor, also reduced the consumption of permanent magnet in the motor manufacture process simultaneously.
2, stator adopts bidentate U-iron core unit, simple and reliable for structure, convenient processing and manufacture, the thin type structure of motor in axial magnetic field has shortened the main magnetic circuit of motor greatly, strengthened the weak magnetism speed expansion ability of motor, be well suited for being applied in the straight drive system of the slow-speed of revolution, big torque.
Description of drawings
Fig. 1 is the three-dimensional structure schematic diagram of the axial magnetic field permanent magnet brushless electric machine of smooth torque output.
Fig. 2 is the fan-shaped permanent magnet of a bidentate U-shaped stator core unit and a unit, is the basic composition unit of stator structure, and each stator all is made of 6 so elementary cells.
Have among the above figure: first stator 1, rotor 2, armature winding 3, permanent magnet 4, bidentate U-iron core 5, non-magnetic conduction annulus 6, rotor pole 7, second stator 8.Four coils 311,312,313,314 that comprise the mutually centralized armature winding of A in the armature winding 3, four coils 321,322,323,324 of the mutually centralized armature winding of B, four coils 331,332,333,334 of the mutually centralized armature winding of C.
Embodiment
The axial magnetic field permanent magnet brushless electric machine of the smooth torque output that the utility model proposed, comprise two stators, rotor, centralized armature winding and a fan-shaped permanent magnet, rotor folds up between two stators, stator and rotor coaxial are installed, and leave the air-gap of equal length between two stators and the rotor.The structure of two stators is just the same, and the position is about the rotor symmetry; Each stator is made of 6 bidentate U-iron cores, 6 fan-shaped permanent magnets and 6 concentrated armature coils, and centralized armature coil is on the tooth of two adjacent bidentate U-iron cores, and fan-shaped permanent magnet embeds in the middle of bidentate U-iron core; Permanent magnet on the stator is along tangentially alternately magnetizing, and the direction of magnetization of corresponding permanent magnet is opposite on two stators; 6 centralized armature coils are divided into A, B, C three-phase on each stator, two armature coils of homophase phase that connects and composes in sequential series, and then the series connection of the armature winding of same phase on two stators is constituted three-phase (A phase, B phase, the C phase) armature winding of whole motor; The rotor of motor is the straight trough structure, has not both had permanent magnet also not have winding on the rotor, has 19 teeth, is called 19 rotor poles, evenly is arranged on the excircle of the non-magnetic conduction annulus of rotor.The tooth of bidentate U-shaped stator core and rotor pole all are sector structures.
The structural characteristics of axial magnetic field permanent magnet brushless electric machine of smooth torque output itself make it have very strong poly-magnetic effect, the air gap flux density of this motor is big, power density and torque density height, and the application of low torque ripple structure makes that the torque characteristics of motor is better.The threephase armature winding adopts concentrates winding configuration, and the end of armature is short, and winding resistance is little, the motor working efficiency height.
As shown in Figure 1, two gap structure motors that the axial magnetic field permanent magnet brushless electric machine of smooth torque output is made up of first stator 1, second stator 8 and rotor 2, first stator 1, second stator 8 are salient-pole structure with rotor 2, rotor 2 folds up in the middle of two first stators 1, second stator 8, first stator 1, second stator 8 and rotor 2 coaxial installations leave the air-gap of equal thickness between the rotor 2 and first stator 1, second stator 8.The structure of first stator 1, second stator 8 is just the same, and about rotor 2 symmetries; Each stator all is to be made of 6 bidentate U-shaped stator cores, 6 fan-shaped permanent magnets, 6 centralized armature coils, and bidentate U-shaped stator core and fan-shaped permanent magnet are alternately placed and constituted disk, and the direction of magnetization of corresponding permanent magnet is opposite on two stators.
Two coils 311,312 on the stator 1 are in sequential series, constitute the A phase armature winding on first stator 1, coil 313,314 is positioned on second stator 8, with the A phase armature winding on two coils formation second stator 8 in sequential series, the A phase armature winding on two stators is in series or in parallel to form the A phase armature winding of whole motor.
In like manner, the B of motor is mutually identical with A with the constructive method of C phase armature winding mutually.
12 centralized armature coils of above-mentioned A, B, C three-phase are on the tooth at two adjacent bidentate U-shaped stator core two ends (as shown in Figure 1) all, the middle permanent magnet that embeds, and permanent magnet alternately magnetizes along circumferencial direction.
Rotor 2 is a salient-pole structure, has 19 sectors, and 19 teeth of rotor extremely evenly are arranged on the non-magnetic conduction annulus circumference of rotor 2.Both do not had permanent magnet also not have winding on the rotor, rotor pole and bidentate U-shaped stator core are all formed by the punching silicon-steel of high permeability.First stator 1, second stator 8 are assembled by the conducting magnet core of bidentate U-shaped structure.Fan-shaped permanent magnet is ferrite or Nd-Fe-B permanent magnetic magnet steel.
The axial magnetic field permanent magnet brushless electric machine of smooth torque output of the present utility model moves as motor, its operation logic is consistent with traditional magnetic flux switching stator permanent magnet motor, the improvement structure that the utility model proposes, improve motor-driven torque density effectively, reduced torque pulsation, also reduced the consumption of permanent magnet during motor is made simultaneously.The type motor need in big torque, the slow-revving straight drive system can be applied to.
Claims (4)
1. the axial magnetic field permanent magnet brushless electric machine of smooth torque output is characterized in that this motor comprises rotor (2) and is positioned at first stator (1), second stator (8) of rotor (2) both sides;
Each stator is made of armature winding (3) in 6 bidentate U-iron cores (5), 6 fan-shaped permanent magnets and 6 three-phase set, and respectively there are two teeth on the both sides of each bidentate U-shaped stator core, and promptly each bidentate U-iron core unit has 4 teeth; Insert a fan-shaped permanent magnet (4) between per two bidentate U-iron cores, armature coil is on the tooth of two bidentate U-iron cores; Stator is alternately placed assembled by bidentate U-shaped stator core (5) and fan-shaped permanent magnet (4), the magnetizing direction of corresponding fan-shaped permanent magnet (4) is opposite on two stators; The direction of magnetization of adjacent permanent magnet is opposite on the same stator, and along the circumference cutting orientation magnetizing;
Two radially relative armature coils belong to same phase, and with its connection in sequential series, the first centralized armature coil (311), second centralized armature coil (312) position are relative, and two armature coils backs in sequential series are constituted A phase armature winding; The 3rd centralized armature coil (321), the 4th centralized armature coil (322) position are relative, and two coils backs in sequential series constitute B phase armature winding; The 5th centralized armature coil (331), the 6th centralized armature coil (332) position are relative, and two coils backs in sequential series constitute C phase armature winding, just form A phase, B phase, C this threephase armature winding mutually like this on first stator (1); In like manner, the 7th relative centralized armature coil (313) of the last position of second stator (8) is connected in series with the 8th centralized armature coil (314) and constitutes A armature winding mutually, the 9th relative centralized armature coil (323) of position is connected in series with the tenth centralized armature coil (324) and constitutes B armature winding mutually, and the 11 relative centralized armature coil (333) of position is connected in series with the 12 centralized armature coil (334) and constitutes C armature winding mutually; A phase on two stators, B phase, C phase armature winding serial or parallel connection are connected and composed A phase, B phase, the C phase armature winding of whole motor.
2. the axial magnetic field permanent magnet brushless electric machine of smooth torque output according to claim 1, it is characterized in that rotor (2) is a salient-pole structure, have 19 teeth, be called 19 rotor poles (7), each rotor pole is the sector shape, rotor pole is equally distributed on the excircle of non-magnetic conduction annulus (6) of rotor (2), and the axial length of rotor pole equates with the axial length of non-magnetic conduction annulus, and both do not had permanent magnet on the rotor and also do not had winding.
3. the axial magnetic field permanent magnet brushless electric machine of smooth torque according to claim 1 output is characterized in that the tooth of bidentate U-iron core (5) and groove all are fan-shaped, fan-shaped consistent with rotor pole (7).
4. the axial magnetic field permanent magnet brushless electric machine of smooth torque output according to claim 1, it is characterized in that this motor stator form by 6 bidentate U-shaped stator cores (5) and 6 fan-shaped permanent magnets (4), rotor is made up of 19 rotor poles and non-magnetic conduction annulus, and rotor pole is embedded in and constitutes basic motor on the non-magnetic conduction annulus; Stator unit, the rotor pole of basic motor are carried out the integral multiple expansion, can obtain stator 2 * 12 grooves/rotor 19 utmost points, stator 2 * 24 grooves/rotor 38 utmost points, stator 2 * 36 grooves/rotor 57 utmost points ... structural electromotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202019199U CN202085046U (en) | 2011-06-16 | 2011-06-16 | Axial field permanent magnet brushless motor with smooth torque output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202019199U CN202085046U (en) | 2011-06-16 | 2011-06-16 | Axial field permanent magnet brushless motor with smooth torque output |
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| Publication Number | Publication Date |
|---|---|
| CN202085046U true CN202085046U (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202019199U Expired - Lifetime CN202085046U (en) | 2011-06-16 | 2011-06-16 | Axial field permanent magnet brushless motor with smooth torque output |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223035A (en) * | 2011-06-16 | 2011-10-19 | 东南大学 | Low-torque pulse axial magnetic field stator permanent magnet motor |
| CN103390978A (en) * | 2013-07-18 | 2013-11-13 | 东南大学 | Double-stator disc type mixed excitation motor |
| CN103490575A (en) * | 2013-10-17 | 2014-01-01 | 东南大学 | Multi-tooth mixed excitation disc-type wind driven generator |
| CN104779754A (en) * | 2015-05-12 | 2015-07-15 | 南通大学 | Dual-winding axial magnetic flux-switching fault-tolerant motor |
| CN105720865A (en) * | 2014-12-04 | 2016-06-29 | 德昌电机(深圳)有限公司 | DC brushless motor, control method therefor, and power-assisted steering system |
| CN105896820A (en) * | 2016-04-25 | 2016-08-24 | 山东理工大学 | Exhaust gas turbine driven electric excitation generator |
| CN110518766A (en) * | 2018-05-22 | 2019-11-29 | 南京理工大学 | Asymmetric bimorph transducer composite excitation type axial magnetic field flux switch motor |
-
2011
- 2011-06-16 CN CN2011202019199U patent/CN202085046U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223035A (en) * | 2011-06-16 | 2011-10-19 | 东南大学 | Low-torque pulse axial magnetic field stator permanent magnet motor |
| CN102223035B (en) * | 2011-06-16 | 2013-05-01 | 东南大学 | Low-torque pulse axial magnetic field stator permanent magnet motor |
| CN103390978A (en) * | 2013-07-18 | 2013-11-13 | 东南大学 | Double-stator disc type mixed excitation motor |
| CN103390978B (en) * | 2013-07-18 | 2016-03-16 | 东南大学 | A kind of bimorph transducer disc type mixed excitation electric machine |
| CN103490575A (en) * | 2013-10-17 | 2014-01-01 | 东南大学 | Multi-tooth mixed excitation disc-type wind driven generator |
| CN103490575B (en) * | 2013-10-17 | 2016-03-30 | 东南大学 | Multiple tooth mixing exciter panel type wind-driven generator |
| CN105720865A (en) * | 2014-12-04 | 2016-06-29 | 德昌电机(深圳)有限公司 | DC brushless motor, control method therefor, and power-assisted steering system |
| CN104779754A (en) * | 2015-05-12 | 2015-07-15 | 南通大学 | Dual-winding axial magnetic flux-switching fault-tolerant motor |
| CN104779754B (en) * | 2015-05-12 | 2018-02-06 | 南通大学 | Double winding axial magnetic field magnetic flux switches fault-tolerant motor |
| CN105896820A (en) * | 2016-04-25 | 2016-08-24 | 山东理工大学 | Exhaust gas turbine driven electric excitation generator |
| CN105896820B (en) * | 2016-04-25 | 2018-04-06 | 山东理工大学 | A kind of electric excitation generator driven by exhaust gas turbine |
| CN110518766A (en) * | 2018-05-22 | 2019-11-29 | 南京理工大学 | Asymmetric bimorph transducer composite excitation type axial magnetic field flux switch motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111221 Effective date of abandoning: 20130501 |
|
| RGAV | Abandon patent right to avoid regrant |