CN205178812U - Fan and single -phase external rotor brushless motor thereof - Google Patents
Fan and single -phase external rotor brushless motor thereof Download PDFInfo
- Publication number
- CN205178812U CN205178812U CN201520616855.7U CN201520616855U CN205178812U CN 205178812 U CN205178812 U CN 205178812U CN 201520616855 U CN201520616855 U CN 201520616855U CN 205178812 U CN205178812 U CN 205178812U
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- China
- Prior art keywords
- rotor
- brushless electric
- stator
- phase external
- air gap
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/30—Driving arrangements
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/30—Driving arrangements
- D06F37/304—Arrangements or adaptations of electric motors
-
- 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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
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- 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
- H02K1/16—Stator cores with slots for windings
-
- 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
- H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2791—Surface mounted magnets; Inset magnets
- H02K1/27915—Magnets shaped to vary the mechanical air gap between the magnets and the stator
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- 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)
- Textile Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The utility model provides a single -phase external rotor brushless motor, the brushless motor comprises a stator and a rotor. The stator includes stator core and winds locates the winding on the stator core, stator core includes yoke portion, the portion follows the radial outside a plurality of tooth that extends by the yoke, every tooth includes the tooth body and extends the crown that forms by the terminal circumference of following of tooth body, the rotor includes rotor yoke portion, and set up the permanent magnet on rotor yoke portion inner wall, form the air gap between the relative just permanent magnet's of permanent magnet's the internal surface and the surface of crown the internal surface and the surface of crown, magnetic flow change along with the position difference of the relative stator of rotor of stator is passed in the magnetic field that the rotor produced, magnetic flow when the maximum value of magnetic flow is greater than the rotor and is located dead center position, thereby make the rotor can be positioned an initial position under the state that the motor was not switched on, initial position corresponds the maximum value of magnetic flow, and the skew dead center position of this initial position. The utility model provides an use the fan of this motor.
Description
[technical field]
The utility model relates to a kind of motor, particularly, relates to and a kind ofly has the single-phase external rotor brushless electric machine of less cogging torque and use the blower fan of this single-phase external rotor brushless electric machine.
[background technology]
Single-phase external rotor brushless electric machine generally comprises stator and the rotor around stator rotation.Multiple teeth portion that stator comprises stator core and extended by stator core, winding winding in teeth portion.Rotating magnetic field is produced after winding energising.Rotor is arranged around stator, and some permanent magnet poles of the rotor yoke that generally comprises rotating shaft, is fixedly installed to the rotor yoke of rotating shaft, is fixed to are to form rotor field.The rotating magnetic field effect of rotor field and stator, makes rotor produce rotary motion.In order to make the initial position of rotor avoid dead-centre position, the outer surface of stator core teeth portion adopts unsymmetric structure usually, and the cogging torque of this kind of motor is usually larger, affects the Smooth Rotation of motor, thus produces the phenomenons such as velocity perturbation, vibration and noise.
[utility model content]
To be that utility model is a kind of reduce the single-phase external rotor brushless electric machine of cogging torque and use the blower fan of this single-phase external rotor brushless electric machine an object of the present utility model.
For this reason, the single-phase external rotor brushless electric machine that the utility model provides, comprises stators and rotators.Described stator comprises stator core and is set around the winding on stator core, several teeth that described stator core comprises yoke portion, extended radially outward by yoke portion, the crown that each tooth comprises tooth body and circumferentially formed by tooth body end.Described rotor comprises the rotor yoke being located at described stator core periphery, and the permanent magnet be arranged at for the formation of several magnetic poles on rotor yoke inwall, the inner surface of described permanent magnet and the outer surface of crown relative to and form air gap between the inner surface of permanent magnet and the outer surface of crown so that rotor can relative stator rotate.Under the state that motor is not energized, the magnetic field that rotor produces changes with the position difference of rotor relative stator through the magnetic flux of stator, the maximum of described magnetic flux is greater than magnetic flux when rotor is positioned at dead-centre position, thus an initial position can be positioned under the state that rotor is not energized at motor, the maximum of the corresponding described magnetic flux of described initial position, and this initial position departs from dead-centre position.
Preferably, form notch between adjacent two crowns, described notch width is in the circumferential less than or equal to 5 times of the smallest radial width of described air gap; More preferably, described notch width is in the circumferential less than or equal to 3 times of the smallest radial width of described air gap.
Preferably, described air gap is non-homogeneous air gap, and the radial width of the air gap at each magnetic pole place corresponding becomes large gradually along the direction from the middle part of this magnetic pole towards its circumferential two ends.
Preferably, the maximum radial width of described air gap and the ratio of smallest radial width are greater than 1.5.
Preferably, the radial width of the air gap at each magnetic pole place corresponding is symmetrical about the circumferential center line of this magnetic pole.
Preferably, the outer surface of described crown is positioned on the same face of cylinder, the center on the described face of cylinder and the concentric of rotor.
Preferably, the inner surface of described permanent magnet poles is plane or cambered surface, and pole embrace is greater than 0.75.
Preferably, described stator also comprises coil holder and the winding winding on coil holder being sheathed on stator core, described coil holder comprises wire reeling rack and inserting rack, described wire reeling rack and inserting rack set sub-magnetic core from axis two end shields of stator core respectively, and described wire reeling rack and inserting rack include the ring portion of sheathed described ring part, the cover portion of sheathed described tooth body and support the stop part of inner surface of described crown.
Preferably, axial one end of described stop part is provided with flanging, and described flanging covers the end face of the axial end portion establishing described crown at least in part.
Preferably, at least one connecting corner place of described crown and tooth body is provided with joint-cutting.
Preferably, several teeth of described magnetic core are shaping respectively and be interconnected to constitute magnetic core.
Preferably, at least one tooth of described magnetic core shaping separately after be connected in yoke portion.
Preferably, described rotor comprises some described permanent magnets, and described permanent magnet by Plastic Package integrally.
On the other hand, the utility model also provides a kind of single-phase external rotor brushless electric machine, comprises stators and rotators.Described stator comprises stator core and is set around the winding on stator core, multiple teeth that described stator core comprises ring part, extended radially outward by ring part, the crown that each tooth comprises tooth body and circumferentially formed by tooth body end, forms notch between adjacent two crowns.Described rotor comprises the rotor yoke around described stator core, and the permanent magnet be arranged on rotor yoke inwall is for the formation of some magnetic poles, the inner surface of described permanent magnet is relative with the outer surface of crown and form air gap between the inner surface of permanent magnet and the outer surface of crown.Described notch width is in the circumferential less than or equal to 5 times of the smallest radial width of described air gap, and the radial width of described air gap becomes large by the circumferential middle position of the inner surface of corresponding magnetic pole described in each gradually towards the circumferential direction of both ends of described magnetic pole.Preferably, described rotor can be positioned an initial position when motor is not energized, and described initial position departs from dead-centre position.
Preferably, described notch width is in the circumferential less than or equal to 3 times of the smallest radial width of described air gap.
Preferably, described air gap is non-homogeneous air gap, and the maximum radial width of described air gap and the ratio of smallest radial width are greater than 1.5.
Preferably, the radial width of the air gap at each magnetic pole place corresponding is symmetrical about the circumferential center line of this magnetic pole.
Preferably, the crown of described tooth is symmetrical about the radius by this Chi Chishen center of motor.
Preferably, several teeth of described magnetic core are shaping respectively and be interconnected to constitute magnetic core.
Preferably, at least one tooth of described magnetic core shaping separately after be connected on described ring part.
Preferably, described rotor comprises some described permanent magnets, and described permanent magnet by Plastic Package integrally.
Again on the one hand, the utility model also provides a kind of single-phase external rotor brushless electric machine, comprises stators and rotators.Described stator comprises stator core and is set around the winding on stator core, several teeth that described stator core comprises yoke portion, extended radially outward by yoke portion, the crown that each tooth comprises tooth body and circumferentially formed by tooth body end.Described rotor comprises the rotor yoke being located at described stator core periphery, and the permanent magnet be arranged at for the formation of several magnetic poles on rotor yoke inwall, the inner surface of described permanent magnet and the outer surface of crown relative to and form air gap between the inner surface of permanent magnet and the outer surface of crown so that rotor can relative stator rotate.Under the state that motor is not energized, the position that rotor stops makes the center line of the crown of stator just to the intersection of adjacent two magnetic poles of rotor.
The utility model also provides a kind of blower fan using above-mentioned single-phase external rotor brushless electric machine, and described blower fan also comprises by this motor-driven impeller,
In above-mentioned single-phase external rotor brushless electric machine, notch is formed between the adjacent teeth of stator core, air gap is formed between the crown outer surface of stator tooth and the permanent magnet poles inner surface of external rotor, notch width is in the circumferential less than or equal to 5 times of the smallest radial width of described air gap, the maximum radial width of air gap and the ratio of smallest radial width are greater than 1.5, setting like this, the stray field produced by rotor magnetic pole can be positioned the initial position of rotor and make its initial position depart from dead-centre position, and cogging torque can be effectively suppressed.
Below in conjunction with drawings and Examples, the utility model is described in further detail.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the single-phase external rotor brushless electric machine that the utility model first embodiment provides.
Fig. 2 is the radial sectional structure schematic diagram of the brushless electric machine of single-phase external rotor shown in Fig. 1.
Fig. 3 is the axial sectional structure schematic diagram of the brushless electric machine of single-phase external rotor shown in Fig. 1.
Fig. 4 is the enlarged diagram of part in Fig. 2 dotted line frame.
Fig. 5 is the structural representation of the stator core in the brushless electric machine of single-phase external rotor shown in Fig. 1.
Fig. 6 is the structural representation of the coil holder in the brushless electric machine of single-phase external rotor shown in Fig. 1.
Fig. 7 is the assembly drawing of coil holder shown in magnetic core and Fig. 6 shown in Fig. 5.
Fig. 8 shows the schematic diagram of the brushless electric machine of single-phase external rotor shown in Fig. 1 when the state lower rotor part be not energized forwards dead-centre position to.
Fig. 9 shows the schematic diagram of the brushless electric machine of single-phase external rotor shown in Fig. 1 when the state lower rotor part be not energized forwards initial position to.
Figure 10 shows that the magnetic core of the motor of the utility model second embodiment.
Figure 11 shows that the magnetic core of the motor of the utility model the 3rd embodiment.
Figure 12 and Figure 13 shows that the rotor of motor of another embodiment of the utility model.
Figure 14 shows the embodiment of the blower fan using motor of the present utility model.
[embodiment]
With reference to figure 1, Fig. 2 and Fig. 3, the magneto that the utility model embodiment provides comprises stator 10 and the rotor 20 around described stator 10.
Stator 10 comprises the stator core 11 be made up of permeability magnetic material, the coil holder 13 being sheathed on stator core 11 and the winding 15 of winding on coil holder 13.
In the lump with reference to figure 2, Fig. 4 and Fig. 5, described stator core 11 comprises the ring part 110 being positioned at center, i.e. stator yoke, and the multiple teeth extended radially outward by ring part 110, forms winding slot between adjacent teeth.The crown 114 that each tooth comprises tooth body 112 and circumferentially formed by tooth body 112 end, the notch 115 of winding slot is formed between adjacent two crowns 114, preferably, each notch 115 width is in the circumferential consistent, and also namely crown 114 is circumferentially evenly arranged.Preferably, each tooth is symmetrical about the radius by this Chi Chishen center of motor.
Ring part 110 is roughly in open column shape, and formation through hole 111 is run through at the center of ring part 110 vertically.As shown in Figure 1, Figure 2 with shown in Fig. 3, described stator 10 also comprises base 16 and is formed in the central siphon 17 on base 16.Base 16 is roughly in disc, and central siphon 17 is vertically extended by base 16 central part, for fixedly mounting stator core 11 thereon.Particularly, this central siphon 17 is located in the through hole 111 of the ring part 110 of stator core 11.In central siphon 17, axis hole is set, for being rotatably mounted the rotating shaft 21 of rotor 20.
Tooth body 112 radially extends from the outer wall of ring part 110, and multiple tooth body 112 is uniformly distributed in the circumference of ring part 110.The radial extremity of each tooth body 112 arranges a crown 114, and preferably, crown 114 is symmetrical about the radius by Chi Shen 112 center of motor.Simultaneously with reference to figure 4, namely the outer surface 117 of crown 114, also deviate from the surface of ring part 110, is cambered surface.Preferably, the outer surface 117 of described crown 114 is positioned on the same face of cylinder, the center on the described face of cylinder and the centres of rotating shaft 21.The inner surface 118 of crown 114, also namely towards the surface of ring part 110, is roughly plane.
In certain embodiments, described crown 114 is provided with joint-cutting 116 with the connecting corner place of tooth body 112.Joint-cutting 116 is set, the crown 114 of stator core 11 can be made to there will not be wrinkle when bending forming.Particularly, the both wings that crown 114 is positioned at tooth body 112 both sides are first in the state of radially opening, and so can increase the width of winding slot and notch 115, thus facilitate winding 15 coiling, after coiling completes, then by instrument, the both wings of crown 114 are bent inwards to final position around joint-cutting 116.Understandably, in some cases, also only the one-sided wing of tooth body 112 can be positioned at and tooth body 112 connecting corner place establishes joint-cutting 116 at crown 114.
As shown in Figure 6 and Figure 7, described coil holder 13 comprises wire reeling rack 131 and inserting rack 133, and described wire reeling rack 131 and inserting rack 133 set sub-magnetic core 11 from axis two end shields of stator core 11 respectively.
Described wire reeling rack 131 is substantially identical with structure with the shape of inserting rack 133, and the position according to installing is different, and wire reeling rack 131 and inserting rack 133 are put in opposite directions.Wire reeling rack 131 and inserting rack 133 include the ring portion 130 of sheathed described stator core 11 ring part 110, the cover portion 132 of sheathed described tooth body 112 and support the stop part 134 of inner surface 118 of described crown 114.Ring portion 130 is roughly circular tube shaped, is around in the outer wall of stator core ring part 110.The axial top of ring portion 130 is provided with the end limit 136 extended in the form of a ring inwardly.End limit 136 is covered on the top end face of ring part 110.The sidewall of ring portion 130 offers some openings (sign), opening part forms described cover portion 132, and opening passes through for tooth body 112, and 132, cover portion is located at end face and two sides of tooth body 112, corresponding to end face and the side of tooth body 112, cover portion 132 also has end face and side.The end face of tooth body 112 and the end face of tooth body 112 and bottom surface, two faces that the side of tooth body 112 is namely parallel with radial direction.Be appreciated that the cover portion 132 of wire reeling rack 131 is located at end face and two sides of tooth body 112, the cover portion 135 of inserting rack 133 is located at bottom surface and two sides of tooth body 112.Wire reeling rack 131 and inserting rack 133 substantially by the side of tooth body 112 and end face all standing, with insulation stator magnetic core 11 and winding 15.
Stop part 134 is circumferentially turned down by the radial extremity in cover portion 132 and extends, and supports on the inner surface 118 of a corresponding crown 114.
Further, axial one end of described stop part 134 is provided with flanging 135, and at least part of lid of described flanging 135 establishes the end face of the axial end portion of described crown 114.Particularly, the axial top of the stop part 134 on wire reeling rack 131 is provided with described flanging 137, and the lid that on wire reeling rack 131, the flanging 135 of formation is at least part of is located at the axial top end face of corresponding crown 114; The axial bottom of the stop part 134 on inserting rack 133 is provided with described flanging 135, and the lid that on inserting rack 133, the flanging 137 of formation is at least part of is located at the axial bottom face of corresponding crown 114.
As shown in Figure 1 to Figure 3, described rotor 20 comprises the rotating shaft 21 being arranged in described ring part 110, the rotor yoke 22 be fixedly connected with rotating shaft 21, and the permanent magnet 24 be arranged on rotor yoke 22 inwall is for the formation of multiple permanent magnet poles 24.In the present embodiment, described permanent magnet 24 is sectional type magnet, and each permanent magnet 24 forms a permanent magnet poles 24.Alternatively, described permanent magnet also can make toroidal magnet.Preferably, the inner surface 241 of described permanent magnet 24 is plane, so can simplify the manufacturing process of permanent magnet 24; The inner surface of certain described permanent magnet 24 also can be cambered surface.Preferably, the pole embrace of described permanent magnet 24, namely the actual number of degrees of permanent magnet 24 circumference and 360 degree are divided by the ratio of the business of rotor number of poles, are greater than 0.75, so can improve the torque characteristics of motor and improve the efficiency of motor.
Refer to Fig. 3, described rotating shaft 21 is arranged in the axis hole of central siphon 17 rotationally, such as, be supported on rotationally in central siphon 17 by bearing.Rotor yoke 22 roughly in tubular, is located on stator core 11.Rotor yoke 22 has the end plate 221 be fixedly connected with rotating shaft 21 and the annular sidewall 222 extended by end plate 221.End plate 221 is relative with base 16, has certain interval between sidewall 222 axial end and base 16.End plate 221 is provided with some windows, enters cool motor internal for outer gas stream.During machine operation, under the magnetic field interaction of permanent magnet poles 24 and stator, rotor yoke 22 relative stator is rotated.
In certain embodiments, the quantity of described permanent magnet poles 24 is identical with the quantity of tooth, and both can also become multiple proportion, if the number of teeth is 2 times, 3 times of permanent magnet poles number etc.In the present embodiment, described rotor 20 comprises 8 permanent magnets and forms 8 magnetic poles respectively, and described stator 10 comprises 8 stator tooths and forms 8 winding slots altogether between adjacent teeth, thus forms 8 pole 8 groove motors.Preferably, described stator winding electrical connection is also provided with blow-up inversion of direct current electricity by single-phase brushless direct-current motor driver, thus forms single-phase DC brushless motor.Understandably, design of the present utility model also can be used in single-phase permanent-magnet synchronous motor.
As shown in Figure 4, the inner surface 241 of described permanent magnet poles 24 is relative with the outer surface 117 of crown 114, forms air gap 119 between the two.The radial width of air gap 119 along permanent magnet poles 24 circumference change thus form non-homogeneous air gap.The radial width of described air gap 119 becomes large by the circumferential middle position of the inner surface 117 of the described permanent magnet poles of correspondence 24 gradually towards the circumferential two ends of inner surface 117 of permanent magnet poles 24.Like this, the radical length between the circumferential mid point of permanent magnet poles 24 inner surface and the face of cylinder, crown 114 outer surface place is the smallest radial width G 1 of air gap 119; Radical length between the circumferential end points of permanent magnet poles 24 inner surface and the face of cylinder, crown 114 outer surface place is the maximum radial width G2 of air gap 119.Preferably, the maximum radial width of described air gap 119 and the ratio of smallest radial width are greater than 1.5, that is, G2:G1>1.5.More preferably, the maximum radial width of described air gap and the ratio of smallest radial width are greater than 2, i.e. G2:G1>2.
The width D (being often referred to notch 115 minimum widith in the circumferential) of described notch 115 is greater than 0, is less than or equal to 5 times of the smallest radial width of described air gap 119, i.e. 0≤D≤5G1.Preferably, the width D of notch 115 is more than or equal to the smallest radial width of described air gap 119, is less than or equal to 3 times of the smallest radial width of described air gap 119, i.e. G1≤D≤3G1.
Consult Fig. 8 and Fig. 9, when motor is not energized, the tooth of permanent magnet 24 pairs of stators 10 of rotor 20 produces attraction, Fig. 8 and Fig. 9 shows the schematic diagram of rotor 20 when diverse location simultaneously.Particularly, Fig. 8 shows rotor 20 and is positioned at dead-centre position (namely the pole center of rotor is just to stator crown center).Fig. 9 show rotor 20 be positioned at initial position (namely motor be not energized or power-off state lower rotor part stop position).As shown in Figure 8 and Figure 9, when rotor 20 is positioned at dead-centre position, the magnetic field that the magnetic pole of rotor 20 produces is Φ 1 through the magnetic flux of stator 10, when rotor 20 is positioned at initial position, the magnetic field that the magnetic pole of rotor 20 produces is Φ 2 through the magnetic flux of stator 10, and Φ 2> Φ 1, thus can be positioned initial position under the state that rotor 20 is not energized at motor, avoid dead-centre position, and then the problem of rotor fail to start when avoiding electrical power.In the present embodiment, rotor 20 motor be not energized or power-off time be parked in initial position as shown in Figure 9.At this initial position, the center line of stator core tooth body 112 just to the center line between corresponding two adjacent rotor pole 24, this position deviation dead-centre position farthest, the problem of rotor fail to start when effectively avoiding electrical power.Owing to there is other factors such as friction grade under actual conditions, the center line of stator core tooth body 112 may depart from the center line certain angle between corresponding two adjacent rotor pole 24, as depart from positive and negative 0 ~ 30 degree not etc., but still away from dead-centre position.
In above-described embodiment of the present utility model, producing magnetic field by rotor magnetic pole 24 self can position the initial position of rotor and make its initial position depart from dead-centre position.Its cogging torque of single-phase permanent brushless motor with this kind of setting can be suppressed effectively, thus makes motor have higher efficiency and better performance.Experiment show shows, a kind of single-phase external rotor brshless DC motor (nominal torque 1Nm, rated speed 1000rpm, stator core stack thickness 30mm) designed according to above-mentioned thinking, the peak value of its cogging torque is less than 80mNm.Motor of the present utility model, can be designed to twocouese as required and start, as realized bidirectional rotary by cooperation two position transducers such as Hall element and corresponding controller; Certainly also can be designed to one direction start, an at this moment position transducer.
Figure 10 shows that the magnetic core 40 of the motor of another embodiment of the present utility model.This magnetic core 40 is with the difference of the magnetic core 11 of above-described embodiment: the magnetic core 40 of the present embodiment is interconnected by several single tooth sections 41 and forms.The tooth body 412 that each tooth section 41 comprises a yoke portion section 410, extends radially outward from yoke portion section 410, and by the end crown 414 circumferentially of tooth body 412.Several tooth sections 41 described along the circumferential direction arrange common formation magnetic core 40.The yoke portion section 410 of described some tooth sections 41 forms a ringwise yoke portion jointly.Described yoke portion section 410 can be formed by male-female and connect.In the present embodiment, the circumferential side of each yoke portion section 410 forms a projection 415, and form a groove 417 at circumferential opposite side, the projection 415 of each yoke portion section 410 is snapped in the groove 417 of an adjacent yoke portion section 410, the groove 417 of each yoke portion section 410 accommodates the projection 415 of another yoke portion section 410 adjacent, thus connects as a whole by all tooth sections 41.As an alternative, between described yoke portion section 410 can be plane contact and utilize the mode of welding to fix.Because magnetic core 40 is formed by connecting by single tooth section 41, coiling can be completed in advance, then tooth section 41 is connected as one, thus can be beneficial to reduce the notch size between crown 414, and not affect coiling.
Figure 11 shows that the magnetic core 50 of the motor of another embodiment of the present utility model.The difference of the magnetic core 11 of this magnetic core 40 and the first embodiment is: the magnetic core 40 of the present embodiment comprises first tooth 51 integrally formed with yoke portion 510 and the second shaping separately tooth 52.Described second tooth 52 is snapped in described yoke portion 510, and described first tooth 51 and the second tooth 52 are alternately arranged in the circumferential.Preferably, described second tooth 52 is inserted in described yoke portion 510.Described yoke portion 510 is provided with and somely plugs groove 511, and the radial inner end of described second tooth 52 has and the described portion that plugs 522 plugging groove 511 mating shapes.Preferably, groove 511 is plugged described in for dovetail groove.The magnetic core 50 of the present embodiment comprises single the second shaping tooth 52, second tooth 52 and can be inserted in yoke portion 510 after completing coiling again, so also so that reduce the notch size between crown, and can not affect winding process.
Figure 12 and Figure 13 shows that the rotor 60 of motor of another embodiment of the utility model.The difference of the rotor 20 of this rotor 60 and the first embodiment is: this rotor 60 also comprises an encapsulation part 65.Particularly, described rotor 60, by being placed in mold cavity by rotor yoke 62 and permanent magnet 64, incorporates plastic package mold.Motor of the present utility model is particularly useful for blower fan, as smoke exhaust ventilator, automobile cooling fan, ventilating fan etc.Figure 14 shows that motor 1 of the present utility model is applied to the embodiment of blower fan 2.This blower fan 2 also comprises the impeller 3 be connected with the rotor of motor 1, and described impeller 3 is driven by motor 1 and rotates thus produce air-flow.
For the person of ordinary skill of the art; without departing from the concept of the premise utility; some distortion and improvement can also be made; if rotor magnetic pole is except making in above-described embodiment except unpack format; integral type can also be made; slot number number can be adjusted to 2 pole 2 grooves according to actual needs to N pole N groove etc., and these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (32)
1. a single-phase external rotor brushless electric machine, comprising:
Stator, described stator comprises stator core and is set around the winding on stator core, several teeth that described stator core comprises stator yoke, extended radially outward by stator yoke, the crown that each tooth comprises tooth body and circumferentially formed by tooth body end; And
Rotor, described rotor comprises the rotor yoke being located at described stator core periphery, and the permanent magnet be arranged at for the formation of several magnetic poles on rotor yoke inwall, the inner surface of described permanent magnet and the outer surface of crown relative to and form air gap between the inner surface of permanent magnet and the outer surface of crown so that rotor can relative stator rotate;
It is characterized in that, under the state that motor is not energized, the magnetic field that rotor produces changes with the position difference of rotor relative stator through the magnetic flux of stator, the maximum of described magnetic flux is greater than magnetic flux when rotor is positioned at dead-centre position, thus an initial position can be positioned under the state that rotor is not energized at motor, the maximum of the corresponding described magnetic flux of described initial position, and this initial position departs from dead-centre position.
2. single-phase external rotor brushless electric machine as claimed in claim 1, it is characterized in that, form notch between adjacent two crowns, described notch width is in the circumferential less than or equal to 5 times of the smallest radial width of described air gap.
3. single-phase external rotor brushless electric machine as claimed in claim 1, it is characterized in that, form notch between adjacent two crowns, described notch width is in the circumferential less than or equal to 3 times of the smallest radial width of described air gap.
4. single-phase external rotor brushless electric machine as claimed in claim 1, it is characterized in that, described air gap is non-homogeneous air gap, and the radial width of the air gap at each magnetic pole place corresponding becomes large gradually along the direction from the middle part of this magnetic pole towards its circumferential two ends.
5. the single-phase external rotor brushless electric machine stated as claimed in claim 4, is characterized in that, the maximum radial width of described air gap and the ratio of smallest radial width are greater than 1.5.
6. single-phase external rotor brushless electric machine as claimed in claim 4, is characterized in that, the radial width of the air gap at each magnetic pole place corresponding is symmetrical about the circumferential center line of this magnetic pole.
7. the single-phase external rotor brushless electric machine as described in any one of claim 1 to 6, is characterized in that, the outer surface of described crown is positioned on the same face of cylinder, the center on the described face of cylinder and the concentric of rotor.
8. the single-phase external rotor brushless electric machine as described in any one of claim 1 to 6, is characterized in that, the inner surface of described permanent magnet poles is plane or cambered surface, and pole embrace is greater than 0.75.
9. single-phase external rotor brushless electric machine as claimed in claim 1, it is characterized in that, described stator also comprises the insulation coil holder and the winding of winding on insulation coil holder that are sheathed on stator core, described insulation coil holder comprises wire reeling rack and inserting rack, described wire reeling rack and inserting rack set sub-magnetic core from axis two end shields of stator core respectively, and described wire reeling rack and inserting rack include the ring portion of sheathed described stator yoke, the cover portion of sheathed described tooth body and support the stop part of inner surface of described crown.
10. single-phase external rotor brushless electric machine as claimed in claim 9, it is characterized in that, axial one end of described stop part is provided with flanging, and described flanging covers the end face of the axial end portion establishing described crown at least in part.
11. single-phase external rotor brushless electric machines as described in claim 1 to 6 any one, it is characterized in that, at least one connecting corner place of described crown and tooth body is provided with joint-cutting.
12. single-phase external rotor brushless electric machines as described in claim 1 to 6 any one, is characterized in that, several teeth of described magnetic core are shaping respectively and be interconnected to constitute magnetic core.
13. single-phase external rotor brushless electric machines as described in claim 1 to 6 any one, is characterized in that, are connected in yoke portion after at least one tooth of described magnetic core is shaping separately.
14. single-phase external rotor brushless electric machines as described in claim 1 to 6 any one, it is characterized in that, described rotor comprises some described permanent magnets, and described permanent magnet by Plastic Package integrally.
15. 1 kinds of single-phase external rotor brushless electric machines, comprising:
Stator, described stator comprises stator core and is set around the winding on stator core, multiple teeth that described stator core comprises ring part, extended radially outward by ring part, the crown that each tooth comprises tooth body and circumferentially formed by tooth body end, forms notch between adjacent two crowns; And
Rotor, described rotor comprises the rotor yoke around described stator core, and the permanent magnet be arranged on rotor yoke inwall is for the formation of some magnetic poles, the inner surface of described permanent magnet is relative with the outer surface of crown and form air gap between the inner surface of permanent magnet and the outer surface of crown;
It is characterized in that, described notch width is in the circumferential less than or equal to 5 times of the smallest radial width of described air gap, and the radial width of described air gap becomes large by the circumferential middle position of the inner surface of corresponding magnetic pole described in each gradually towards the circumferential direction of both ends of described magnetic pole.
16. single-phase external rotor brushless electric machines as claimed in claim 15, it is characterized in that, described rotor can be positioned an initial position when motor is not energized, and described initial position departs from dead-centre position.
17. single-phase external rotor brushless electric machines as claimed in claim 15, it is characterized in that, described notch width is in the circumferential less than or equal to 3 times of the smallest radial width of described air gap.
18. single-phase external rotor brushless electric machines as claimed in claim 15, it is characterized in that, described air gap is non-homogeneous air gap, and the maximum radial width of described air gap and the ratio of smallest radial width are greater than 1.5.
19. single-phase external rotor brushless electric machines as claimed in claim 15, is characterized in that, the radial width of the air gap at each magnetic pole place corresponding is symmetrical about the circumferential center line of this magnetic pole.
20. single-phase external rotor brushless electric machines as described in any one of claim 15 to 19, is characterized in that, the crown of described tooth is symmetrical about the radius by this Chi Chishen center of motor.
21. single-phase external rotor brushless electric machines as described in claim 15 to 19 any one, is characterized in that, several teeth of described magnetic core are shaping respectively and be interconnected to constitute magnetic core.
22. single-phase external rotor brushless electric machines as described in claim 15 to 19 any one, is characterized in that, are connected on described ring part after at least one tooth of described magnetic core is shaping separately.
23. single-phase external rotor brushless electric machines as described in claim 15 to 19 any one, it is characterized in that, described rotor comprises some described permanent magnets, and described permanent magnet by Plastic Package integrally.
24. 1 kinds of single-phase external rotor brushless electric machines, comprising:
Stator, described stator comprises stator core and is set around the winding on stator core, several teeth that described stator core comprises stator yoke, extended radially outward by stator yoke, the crown that each tooth comprises tooth body and circumferentially formed by tooth body end; And
Rotor, described rotor comprises the rotor yoke being located at described stator core periphery, and the permanent magnet be arranged at for the formation of several magnetic poles on rotor yoke inwall, the inner surface of described permanent magnet and the outer surface of crown relative to and form air gap between the inner surface of permanent magnet and the outer surface of crown so that rotor can relative stator rotate;
It is characterized in that, under the state that motor is not energized, the position that rotor stops makes the center line of the crown of stator just to the intersection of adjacent two magnetic poles of rotor.
25. single-phase external rotor brushless electric machines as claimed in claim 24, is characterized in that, form notch between adjacent two crowns, described notch width is in the circumferential less than or equal to 5 times of the smallest radial width of described air gap.
26. single-phase external rotor brushless electric machines as claimed in claim 24, is characterized in that, form notch between adjacent two crowns, described notch width is in the circumferential less than or equal to 3 times of the smallest radial width of described air gap.
27. single-phase external rotor brushless electric machines as claimed in claim 24, it is characterized in that, described air gap is non-homogeneous air gap, and the radial width of the air gap at each magnetic pole place corresponding becomes large gradually along the direction from the middle part of this magnetic pole towards its circumferential two ends.
28. as the single-phase external rotor brushless electric machine stated of claim 27, and it is characterized in that, the maximum radial width of described air gap and the ratio of smallest radial width are greater than 1.5.
29. single-phase external rotor brushless electric machines as claimed in claim 27, is characterized in that, the radial width of the air gap at each magnetic pole place corresponding is symmetrical about the circumferential center line of this magnetic pole.
30. single-phase external rotor brushless electric machines as described in any one of claim 24 to 29, it is characterized in that, the outer surface of described crown is positioned on the same face of cylinder, the center on the described face of cylinder and the concentric of rotor.
31. single-phase external rotor brushless electric machines as described in any one of claim 24 to 29, it is characterized in that, the inner surface of described permanent magnet poles is plane or cambered surface, and pole embrace is greater than 0.75.
32. 1 kinds of blower fans, comprise a motor and by this motor-driven impeller, it is characterized in that, described motor is the single-phase external rotor brushless electric machine described in claims 1 to 31 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520616855.7U CN205178812U (en) | 2015-05-08 | 2015-08-14 | Fan and single -phase external rotor brushless motor thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510233218 | 2015-05-08 | ||
| CN2015102332186 | 2015-05-08 | ||
| CN201520616855.7U CN205178812U (en) | 2015-05-08 | 2015-08-14 | Fan and single -phase external rotor brushless motor thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205178812U true CN205178812U (en) | 2016-04-20 |
Family
ID=55742742
Family Applications (15)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520616855.7U Expired - Fee Related CN205178812U (en) | 2015-05-08 | 2015-08-14 | Fan and single -phase external rotor brushless motor thereof |
| CN201510502469.XA Withdrawn CN106130291A (en) | 2015-05-08 | 2015-08-14 | Blower fan and single-phase external rotor brushless electric machine thereof |
| CN201520760145.1U Expired - Fee Related CN205283360U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and stator thereof |
| CN201520761992.XU Expired - Fee Related CN205283361U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and stator thereof |
| CN201510628361.5A Withdrawn CN106130285A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and rotor thereof |
| CN201510629616.XA Withdrawn CN106130292A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and stator thereof |
| CN201510628775.8A Withdrawn CN106130286A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and rotor thereof |
| CN201510631428.0A Withdrawn CN106130206A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and stator thereof |
| CN201520758800.XU Expired - Fee Related CN205283353U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and rotor thereof |
| CN201520759303.1U Expired - Fee Related CN205283354U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and rotor thereof |
| CN201510627364.7A Pending CN106130216A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and rotor thereof |
| CN201520759403.4U Expired - Fee Related CN205283359U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and stator thereof |
| CN201520760241.6U Expired - Fee Related CN205283355U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and rotor thereof |
| CN201510629630.XA Pending CN106130293A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and stator thereof |
| CN201510684071.2A Withdrawn CN106120248A (en) | 2015-05-08 | 2015-10-20 | Use in washing machine driving means |
Family Applications After (14)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510502469.XA Withdrawn CN106130291A (en) | 2015-05-08 | 2015-08-14 | Blower fan and single-phase external rotor brushless electric machine thereof |
| CN201520760145.1U Expired - Fee Related CN205283360U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and stator thereof |
| CN201520761992.XU Expired - Fee Related CN205283361U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and stator thereof |
| CN201510628361.5A Withdrawn CN106130285A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and rotor thereof |
| CN201510629616.XA Withdrawn CN106130292A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and stator thereof |
| CN201510628775.8A Withdrawn CN106130286A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and rotor thereof |
| CN201510631428.0A Withdrawn CN106130206A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and stator thereof |
| CN201520758800.XU Expired - Fee Related CN205283353U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and rotor thereof |
| CN201520759303.1U Expired - Fee Related CN205283354U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and rotor thereof |
| CN201510627364.7A Pending CN106130216A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and rotor thereof |
| CN201520759403.4U Expired - Fee Related CN205283359U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and stator thereof |
| CN201520760241.6U Expired - Fee Related CN205283355U (en) | 2015-05-08 | 2015-09-28 | Single -phase external rotor electric machine and rotor thereof |
| CN201510629630.XA Pending CN106130293A (en) | 2015-05-08 | 2015-09-28 | Single-phase external rotor motor and stator thereof |
| CN201510684071.2A Withdrawn CN106120248A (en) | 2015-05-08 | 2015-10-20 | Use in washing machine driving means |
Country Status (5)
| Country | Link |
|---|---|
| JP (5) | JP2016214070A (en) |
| KR (6) | KR20160131945A (en) |
| CN (15) | CN205178812U (en) |
| BR (5) | BR102016010245A2 (en) |
| MX (8) | MX364407B (en) |
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| CN107404160A (en) * | 2016-05-18 | 2017-11-28 | 德昌电机(深圳)有限公司 | Motor |
| CN108075583A (en) * | 2016-11-17 | 2018-05-25 | 德昌电机(深圳)有限公司 | A kind of round brush dust catcher of external rotor electric machine and the application motor |
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| TWI596866B (en) | 2016-12-02 | 2017-08-21 | 財團法人工業技術研究院 | External rotor motor |
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2015
- 2015-08-14 CN CN201520616855.7U patent/CN205178812U/en not_active Expired - Fee Related
- 2015-08-14 CN CN201510502469.XA patent/CN106130291A/en not_active Withdrawn
- 2015-09-28 CN CN201520760145.1U patent/CN205283360U/en not_active Expired - Fee Related
- 2015-09-28 CN CN201520761992.XU patent/CN205283361U/en not_active Expired - Fee Related
- 2015-09-28 CN CN201510628361.5A patent/CN106130285A/en not_active Withdrawn
- 2015-09-28 CN CN201510629616.XA patent/CN106130292A/en not_active Withdrawn
- 2015-09-28 CN CN201510628775.8A patent/CN106130286A/en not_active Withdrawn
- 2015-09-28 CN CN201510631428.0A patent/CN106130206A/en not_active Withdrawn
- 2015-09-28 CN CN201520758800.XU patent/CN205283353U/en not_active Expired - Fee Related
- 2015-09-28 CN CN201520759303.1U patent/CN205283354U/en not_active Expired - Fee Related
- 2015-09-28 CN CN201510627364.7A patent/CN106130216A/en active Pending
- 2015-09-28 CN CN201520759403.4U patent/CN205283359U/en not_active Expired - Fee Related
- 2015-09-28 CN CN201520760241.6U patent/CN205283355U/en not_active Expired - Fee Related
- 2015-09-28 CN CN201510629630.XA patent/CN106130293A/en active Pending
- 2015-10-20 CN CN201510684071.2A patent/CN106120248A/en not_active Withdrawn
-
2016
- 2016-05-03 MX MX2016005772A patent/MX364407B/en active IP Right Grant
- 2016-05-03 MX MX2016005773A patent/MX2016005773A/en unknown
- 2016-05-04 KR KR1020160055581A patent/KR20160131945A/en unknown
- 2016-05-04 KR KR1020160055521A patent/KR20160131942A/en unknown
- 2016-05-04 KR KR1020160055597A patent/KR20160131946A/en unknown
- 2016-05-04 KR KR1020160055510A patent/KR20160131940A/en unknown
- 2016-05-05 BR BR102016010245A patent/BR102016010245A2/en not_active Application Discontinuation
- 2016-05-05 BR BR102016010234A patent/BR102016010234A2/en not_active Application Discontinuation
- 2016-05-06 BR BR102016010297A patent/BR102016010297A2/en not_active Application Discontinuation
- 2016-05-06 MX MX2016005938A patent/MX2016005938A/en unknown
- 2016-05-06 BR BR102016010295A patent/BR102016010295A2/en not_active Application Discontinuation
- 2016-05-06 MX MX2016005934A patent/MX2016005934A/en unknown
- 2016-05-06 MX MX2016005939A patent/MX2016005939A/en unknown
- 2016-05-06 BR BR102016010296A patent/BR102016010296A2/en not_active Application Discontinuation
- 2016-05-06 MX MX2016005937A patent/MX2016005937A/en unknown
- 2016-05-06 MX MX2016005933A patent/MX2016005933A/en unknown
- 2016-05-06 MX MX2016005935A patent/MX361394B/en active IP Right Grant
- 2016-05-09 JP JP2016093879A patent/JP2016214070A/en active Pending
- 2016-05-09 KR KR1020160056519A patent/KR20160131960A/en unknown
- 2016-05-09 JP JP2016093956A patent/JP2017022970A/en active Pending
- 2016-05-09 JP JP2016093880A patent/JP2016214071A/en active Pending
- 2016-05-09 JP JP2016093881A patent/JP2016226266A/en active Pending
- 2016-05-09 KR KR1020160056463A patent/KR20160131958A/en unknown
- 2016-05-09 JP JP2016093957A patent/JP2016226267A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107404160A (en) * | 2016-05-18 | 2017-11-28 | 德昌电机(深圳)有限公司 | Motor |
| CN108075583A (en) * | 2016-11-17 | 2018-05-25 | 德昌电机(深圳)有限公司 | A kind of round brush dust catcher of external rotor electric machine and the application motor |
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