CN109274237A - External rotor electric machine and washing machine with it - Google Patents
External rotor electric machine and washing machine with it Download PDFInfo
- Publication number
- CN109274237A CN109274237A CN201811070199.XA CN201811070199A CN109274237A CN 109274237 A CN109274237 A CN 109274237A CN 201811070199 A CN201811070199 A CN 201811070199A CN 109274237 A CN109274237 A CN 109274237A
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- China
- Prior art keywords
- electric machine
- magnetic
- external rotor
- rotor electric
- ring
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Classifications
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a kind of external rotor electric machine and with its washing machine, the external rotor electric machine includes: stator, the stator includes: core, and the core includes ring part and 27 magnetic poles, and 27 magnetic poles surround the outer peripheral surface of the ring part being provided at circumferentially spaced in the ring part；Three-phase windings, the three-phase windings include the multiple coils for being set around 27 magnetic poles；Insulator, for making the three-phase windings and 27 pole insulations；Rotor, the rotor include: magnetic conduction hub frame；Magnetic guiding loop, the magnetic guiding loop are set to the magnetic conduction hub frame and collectively form magnetic yoke portion at least part of the magnetic conduction hub frame.32 magnets, 32 magnets are set to the magnetic yoke portion.The fluctuation of speed of the external rotor electric machine implemented according to the present invention when guaranteeing phase back-emf, torque constant and while load capacity, can reduce cogging torque, reduce low speed reduces vibration and noise.
Description
Technical field
The present invention relates to technical field of motors, in particular to a kind of external rotor electric machine and have the external rotor electric
The washing machine of machine.
Background technique
Motor in the related technology is such as applied to the direct driving motor of washing machine, and stator has 27 magnetic poles and rotor has
There are 36 magnetic poles, i.e. the ratio of rotor magnetic pole and magnetic pole of the stator is 4:3, and the cogging torque of this kind of motor is larger, and motor is in low speed
When the fluctuation of speed it is larger, cause vibration and noise higher, so influence washing machine vibration and noise.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention proposes outside one kind
Rotor electric machine, the external rotor electric machine can reduce tooth socket and turn while guaranteeing phase back-emf, torque constant and load capacity
The fluctuation of speed, reduction vibration and noise when square, reduction low speed.
The present invention also proposes a kind of washing machine with the external rotor electric machine.
It is proposed that a kind of external rotor electric machine, the external rotor electric machine include: fixed according to the embodiment of the first aspect of the invention
Son, the stator include: core, and the core includes ring part and 27 magnetic poles, and 27 magnetic poles surround the ring part
The outer peripheral surface being provided at circumferentially spaced in the ring part；Three-phase windings, the three-phase windings include being set around 27 magnetic
Multiple coils of pole；Insulator, for making the three-phase windings and 27 pole insulations；Rotor, the rotor include: to lead
Magnetic hub frame；Magnetic guiding loop, the magnetic guiding loop are set to the magnetic conduction hub frame and are total to at least part of the magnetic conduction hub frame
With composition magnetic yoke portion；32 magnets, 32 magnets are set to the magnetic yoke portion.
External rotor electric machine according to an embodiment of the present invention is guaranteeing the same of phase back-emf, torque constant and load capacity
When, can reduce cogging torque, reduce low speed when the fluctuation of speed, reduce vibration and noise.
Some specific embodiments according to the present invention, the core with a thickness of 18mm~25mm.
Some specific examples according to the present invention, at least most of of the ring part are encapsulated by the insulator.
Further, insulator injection molding and to core progress part cladding.
Some specific examples according to the present invention, the interior diameter of the ring part are 120mm~220mm.
Some specific examples according to the present invention, the interior diameter of the ring part are 190mm~210mm.
Some specific examples according to the present invention, the ring width of the ring part are 4mm~14mm.
Some specific examples according to the present invention, the ring width of the ring part are 7mm~11mm.
Further, the core includes multiple stacked bodies, and the multiple stacked body is engaged in its end, each stacking
Body includes the section and at least one pole parts extended of the ring part.
Further, the adjacent stacked body constitutes the core by dovetail groove engagement.
Some specific examples according to the present invention, the core includes 6 stacked bodies, wherein 3 stacked bodies are respectively
The magnetic pole radially extended with 3, in addition 3 stacked bodies respectively have 6 magnetic poles radially extended.According to this hair
Bright some specific embodiments, the insulator include the fixed part on the inside of the core, and the fixed part includes multiple
Fastener hole and multiple location holes.
Some specific embodiments according to the present invention, the magnetic conduction hub frame includes: end plate；Ring flat-plate portion, the ring flat-plate
Portion is connected to all edges of the end plate and circularizes along the circumferentially extending of the end plate, and the magnetic guiding loop is set to the ring flat-plate
The inner peripheral surface in portion, 32 magnets are set to the inner peripheral surface of the magnetic guiding loop.
Further, the overall diameter of the magnetic guiding loop be greater than the ring flat-plate portion interior diameter so that the magnetic guiding loop with it is described
Ring flat-plate portion interference fit.
Further, the magnet be magnet steel, 32 magnet steel along the ring flat-plate portion circumferential array and be attached at institute
State the inner peripheral surface in ring flat-plate portion.
Some specific examples according to the present invention, the end plate are equipped with injection molding location hole, and the injection molding location hole is more
A and being provided at circumferentially spaced along the end plate.
Some specific embodiments according to the present invention, the magnetic conduction hub frame and the magnetic guiding loop are magnetic conductive metal material
Part.
Some specific embodiments according to the present invention, the magnetic guiding loop with a thickness of 1.1mm-1.9mm.
Some specific embodiments according to the present invention, the rotor further include: spline coupling, the spline coupling peace
Loaded on the magnetic conduction hub frame and central axis is overlapped with the central axis of the magnetic conduction hub frame.
Embodiment according to the second aspect of the invention proposes that a kind of washing machine, the washing machine include: steel ladle；Rotation
Bucket, the rotation bucket are rotatably disposed in the steel ladle；Outer turn according to an embodiment of the first aspect of the invention
Sub-motor, the stator are connected with the steel ladle, and the rotor is connected with the rotation bucket.
Washing machine according to an embodiment of the present invention, it is according to an embodiment of the first aspect of the invention outer by utilizing
Rotor electric machine has the advantages that vibration and noise is low etc..
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of the stator of external rotor electric machine according to an embodiment of the present invention.
Fig. 2 is the partial structure diagram of the stator of external rotor electric machine according to an embodiment of the present invention.
Fig. 3 is the part-structure sectional view of the stator of external rotor electric machine according to an embodiment of the present invention.
Fig. 4 is the coiling schematic diagram of the stator of external rotor electric machine according to an embodiment of the present invention.
Fig. 5 is the structural schematic diagram of the core of the stator of external rotor electric machine according to an embodiment of the present invention.
Fig. 6 and Fig. 7 is the structural schematic diagram of the different angle of the rotor of external rotor electric machine according to an embodiment of the present invention.
Fig. 8 is the partial structural diagram of the magnetic conduction hub frame of the rotor of external rotor electric machine according to an embodiment of the present invention.
Fig. 9 is the structural schematic diagram of the spline coupling of the rotor of external rotor electric machine according to an embodiment of the present invention.
Figure 10 is the comparison diagram of the phase back-emf of existing motor and external rotor electric machine according to an embodiment of the present invention.
Figure 11 is the comparison diagram of the cogging torque of existing motor and external rotor electric machine according to an embodiment of the present invention.
Appended drawing reference:
Stator 2,
Core 100, ring part 110, magnetic pole 120,
Stacked body 200, section 230, pole parts 240, lower punch-out 250,
Fastener hole 300, location hole 310,
Fixed part 400,
Rotor 1,
Magnetic conduction hub frame 10, end plate 11, ring flat-plate portion 12, injection molding location hole 13, gap measurement fabrication hole 14, interior injection molding add
Strengthening tendons 15, outer injection molding reinforcing rib 16, injection molding connecting hole 17,
Magnetic guiding loop 20,
Magnet 30,
Spline coupling 40.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " length ", " width ", " thickness ", "inner",
The orientation or positional relationship of the instructions such as "outside", " axial direction ", " radial direction ", " circumferential direction " is that orientation based on the figure or position are closed
System, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have
Specific orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In description of the invention
In, unless otherwise indicated, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Below with reference to the accompanying drawings external rotor electric machine according to an embodiment of the present invention is described, which is direct driving motor.
As Figure 1-Figure 8, external rotor electric machine according to an embodiment of the present invention includes stator 2 and rotor 1.
Stator 2 includes core 100, three-phase windings and insulator.Core 100 includes ring part 110 and 27 magnetic pole 120,
27 magnetic poles 120 surround the outer peripheral surface of ring part 110 being provided at circumferentially spaced in ring part 110, constitute inner stator.The three-phase
Winding includes the multiple coils for being set around 27 magnetic poles 120.The insulator is for making the three-phase windings and 27 magnets 30
Insulation.
Rotor 1 includes magnetic conduction hub frame 10, magnetic guiding loop 20 and 32 magnet 30.Magnetic conduction hub frame 10 and magnetic guiding loop 20 are
Magnetic conductive part, magnetic guiding loop 20 are set to magnetic conduction hub frame 10, and the two forms rotor core, and magnetic guiding loop 20 and magnetic conduction hub frame 10 are at least
A part collectively forms magnetic yoke portion.32 magnets 30 are set to the surface in the magnetic yoke portion, such as the inner peripheral surface in magnetic yoke portion is arranged in,
Form Surface Mount structure.Wherein, magnetic conduction hub frame 10 and magnetic guiding loop 20 can be magnetic conductive metal material member.
External rotor electric machine according to an embodiment of the present invention, stator 2 is provided with 27 magnetic poles 120, and rotor 1 is provided with 32
The existing motor that stator poles are 27 and rotor number of poles is 36, is modified to that stator poles are 27 and rotor number of poles is by magnet 30
32, the phase back-emf comparison of existing motor and external rotor electric machine of the invention is as shown in figure 9, existing motor and of the invention outer
The cogging torque comparison of rotor electric machine is as shown in Figure 10, phase back-emf rms=338.4V, the cogging torque T=of existing motor
0.094Nm, phase back-emf rms=338.1V, the cogging torque T=0.006Nm of external rotor electric machine of the invention, as a result, root
Existing motor is compared according to the external rotor electric machine of the embodiment of the present invention, the basic indifference of phase back-emf, motor torque constant is close,
The load point efficiency of external rotor electric machine of the invention is 46.93%, and higher than the 43.79% of existing motor, fan-out capability can meet
Complete machine exports demand, i.e. load capacity is essentially identical even more excellent, at the same time, external rotor electric machine according to an embodiment of the present invention
Cogging torque it is smaller, fluctuation of speed when low speed is smaller, and vibration and noise decreases.
Correspondingly, external rotor electric machine according to an embodiment of the present invention, after rotor magnetic pole is modified to 32, since pole slot is matched
The winding displacement wiring of the change of conjunction, the three-phase windings of stator 2 is varied, what winding coefficient was increased to by the 0.866 of existing motor
0.915, for specific winding mode as shown in figure 4, stator injection mold, high stamping die are constant, the line footpath and the number of turns of enameled wire are constant,
Cooperate the variation of rotor number of poles, winding winding mode is adjusted, single needle coiling is changed to by existing three needles coiling.
In addition, can use magnetic guiding loop 20 by setting magnetic guiding loop 20 and magnetic conduction hub frame 10 form rotor core, magnetic conduction
At least part of ring 20 and magnetic conduction hub frame 10 collectively forms magnetic yoke portion, is capable of increasing the integral thickness of rotor yoke, meets
The magnetic circuit of the thickness in 30 region of Surface Mount magnet, rotor yoke is provided jointly by magnetic guiding loop 20 and magnetic conduction hub frame 10, to provide
Biggish magnetic circuit guarantees that external rotor electric machine is less prone to magnetic saturation phenomenon at work, and then guarantees the output of external rotor electric machine
Power, and the material thickness of magnetic conduction hub frame 10 can be reduced.
External rotor electric machine of the invention is applied on washing machine etc., can be effectively improved noise and the vibration of motor rotation.
Specifically, when external rotor electric machine of the present invention be suitable for washing machine on when, core 100 with a thickness of 18mm~
25mm, preferably 20mm.
On this basis, the interior diameter of ring part 110 is 120mm~220mm；Further, the interior diameter of ring part 110
For 190mm~210mm；Preferably, the interior diameter of ring part 110 is 202mm.
On this basis, the ring width of ring part 110 is 4mm~14mm；Further, the ring width of ring part 110 be 7mm~
11mm；Preferably, the ring width of ring part 110 is 9mm.
Certainly, this size section is the optimization design for washing machine, but this size section is not restricted to be applied to wash
On clothing machine, it can be used on other identical electric devices of dynamic mode.
In some embodiments of the invention, at least most of of ring part 110 is encapsulated by the insulator, specifically
Ground, the insulator by core 100 carry out part cladding and injection molding, wherein the lateral surface of magnetic pole 120 usually not by
Cladding.
For example, insulator is after moulding, coiling and terminal compression joint are carried out, then power supply terminal box, power end are installed
It sub- box installation end on insulator and is integrally formed in insulator injection molding.
In some specific examples of the invention, in the cross section of stator 2, each magnetic pole 120 has T-shape, institute
The crossbar sections of each magnetic pole 120 of support are spaced apart by the trunk portion of each magnetic pole 120 with ring part 110.In this hair
In bright some specific examples, as depicted in figs. 1 and 2, the insulator includes fixed part 400, and fixed part 400 is located at stator 2
Center portion, and from the inside of core 100 extend certain distance, include multiple fastener holes 300 and multiple location holes 310, tightly
Solid hole 300 is used to utilize to be bolted that stator 2 to be installed to fixed device, and location hole 310 is used for and fixed device
Protrusion match, positioned with the installation to stator.
It is integrally formed specifically, fixed part 400 is crossed when core 100 carries out part injection cladding by insulator, and with default
It reserves by several holes on the inside of core 100 as fastener hole 300 and location hole 310.Metal bolts are equipped in fastener hole 300
Set, metal bolts set can reduce the damage for the fixed part 400 that bolt forms the injection molding of stator 2 as bolster.Metal bolts
Set is formed in fastener hole 300 by way of injection molding insertion.
Make diacritical, the bore dia of location hole 310 is slightly less than the bore dia of fastener hole 300, without metal in location hole 310
Bolt sleeve, 310 quantity of location hole are less than fastener hole 300, such as two fastener holes 300 and one group of a composition of location hole 310, and
It is located between two fastener holes 300 in location hole 310 in the composition.
In some embodiments of the invention, as shown in figure 5, core 100 is preferably formed using steel lamination.Example
Such as, core 100 includes at least one stacked body 200 of lamination, i.e. stacked body 200 is formed by multiple stack of laminations.
Optionally, core 100 includes multiple stacked bodies 200, and multiple stacked bodies 200 are engaged in its end, each stacking
Body 200 includes the section 230 and at least one pole parts 240 extended of ring part 110, for example, each stacked body 200 wraps
Include multiple pole parts 240.
Wherein, adjacent stacked body 200 is connected by the interlocking structure in adjacent end, for example, multiple stacked bodies 200
The first be connected to constitute core 100 is combined by the dovetail groove being located on section 230.
Optionally, core 100 includes 6 stacked bodies 200, wherein what 3 stacked bodies 200 were respectively radially extended with 3
Magnetic pole 120, in addition 3 stacked bodies 200 respectively have 6 magnetic poles 120 radially extended, so as to improve the utilization of material
Rate.For example, in the circumferential direction of stator 2, stacked body 200 with 3 magnetic poles radially extended 120 and there are 6 radially extends
The stacked body 200 of magnetic pole 120 can be alternately arranged.
Lamination in each stacked body 200 can be by multiple rivets or by the way that the interlocking of lower punch-out 250 is tight
Gu described recessed in the stamped groove into next layer of the kick of each layer of band in the lower punch-out 250
Slot is formed by the kick in layer described in downward punching press.In addition, the lamination can be by adhesive or with some interim sides
Formula fastening can be mutual by the interconnecting piece being appropriately stamped between multi-layer stacks until plastic overmold mold treatment or the lamination
Lock.
In some embodiments of the invention, as shown in figure 5, rotor 1 further includes spline coupling 40, spline shaft coupling
Device 40 is for installing the shaft of motor and circumferentially positioned with being formed after shaft installation, and spline coupling 40 is installed on magnetic conduction hub frame
10, the central axis of spline coupling 40 is overlapped with the central axis of magnetic conduction hub frame 10.
The cross-sectional view of the specific structure of spline coupling 40 is as shown in figure 8, spline coupling 40 has lug on the outside
Edge, for fixation of the spline coupling 40 on magnetic conduction hub frame 10；On the inside of spline coupling 40 there is spline to be used for and shaft
It is cooperatively connected.
In some embodiments of the invention, as shown in figure 5, magnetic conduction hub frame 10 includes end plate 11 and ring flat-plate portion
12。
Ring flat-plate portion 12 is connected to all edges of end plate 11, and ring flat-plate portion 12 is circularized along the circumferentially extending of end plate 11, ring
Plate portion 12 can be arranged perpendicular to end plate 11, and magnetic guiding loop 20 is set to 12,32, ring flat-plate portion magnet 30 and is set to magnetic guiding loop 20.Thus
Make rotor yoke have biggish thickness to provide enough magnetic circuits, meets the high powe design of motor.
Further, as shown in figure 5, magnetic guiding loop 20 is set to the inner peripheral surface in ring flat-plate portion 12,32 magnets 30 are set to magnetic guiding loop
20 inner peripheral surface, to form outer-rotor structure.
Optionally, magnetic guiding loop 20 is formed using edge rolling, magnetic guiding loop 20 with a thickness of 1.1mm-1.9mm, preferably 1.5mm,
To meet the needs of electromagnetic scheme design.
In some embodiments of the invention, as shown in figure 5, the overall diameter of magnetic guiding loop 20 is greater than the interior of ring flat-plate portion 12
Magnetic guiding loop 20 when assembly, is pressed into magnetic conduction hub frame 10, is interference fitted magnetic guiding loop 20 and ring flat-plate portion 12, realizes magnetic conduction by diameter
The installation of ring 20 and magnetic conduction hub frame 10, and it is easy to operate, stable structure is reliable.
Optionally, 32 magnets 30 and are attached at the inner peripheral surface in ring flat-plate portion 12 along the circumferential array in ring flat-plate portion 12 respectively.
In some specific examples of the invention, end plate 11 and ring flat-plate portion 12 include at least the injection structure of a part,
The injection structure is used to reinforce the structural strength of rotor and the installation of firm magnetic guiding loop 20, magnet 30, spline coupling 40.Note
Modeling structure by assemble magnetic guiding loop 20, magnet 30, spline coupling 40 rotor carry out integral coating and be molded and to be formed.
Specifically, injection molding location hole 13 can be multiple as shown in fig. 7, end plate 11 is equipped with injection molding location hole 13, such as
Three, multiple injection molding being provided at circumferentially spaced along end plate 11 of location hole 13.It is possible thereby to guarantee that each component of rotor 1 is being processed
The relative position of magnet 30 and other components after the precision of relative position in the process, such as injection molding, and then it is conducive to rotor 1
Mass production.
Further, as shown in fig. 7, end plate 11 is equipped with gap measurement fabrication hole 14, gap measurement fabrication hole 14 can be with
Be it is multiple, such as nine, multiple gap measurement fabrication holes 14 are provided at circumferentially spaced along end plate 11 in the periphery of end plate 11
At edge.In this way after motor assembling, the air gap between testing staff's measurement stator and rotor 1 can be convenient.
In some specific examples of the invention, as shown in Figure 5 and Figure 6, end plate 11 has injection molding connecting hole 17, injection molding
The inner surface of end plate 11 afterwards forms interior injection molding reinforcing rib 15, and the outer surface of end plate 11 is formed with outer injection molding reinforcing rib
16, there is end plate 11 injection molding connecting hole 17, interior injection molding reinforcing rib 15 and outer injection molding reinforcing rib 16 to pass through injection molding 17 phase of connecting hole
Even.Injection molding reinforcing rib 15 and outer injection molding reinforcing rib 16 are closely integrated into an entirety in as a result, and the knot of rotor 1 greatly improved
Structure intensity and reliability.
Wherein, each of interior injection molding reinforcing rib 15 and outer injection molding reinforcing rib 16, may include multiple radial ribs and
Circumferential rib, multiple radial ribs are radially arranged outward from the center of end plate 11, and circumferential rib is along end plate 11
Circumferentially extending circularizes and is connected with the outer end of multiple radial ribs.
Further, as shown in fig. 7, injection molding connecting hole 17 is the radial waist-shaped hole perpendicular to end plate 11, compared to circle
The cross-sectional area in shape hole, waist-shaped hole is bigger, and the combination of interior injection molding reinforcing rib 15 and outer injection molding reinforcing rib 16 can be made stronger.
Optionally, the distance between two centers of circle for being molded connecting hole 17 are 1mm-5mm.
For example, being molded location hole 13, injection molding connecting hole 17 and air gap characterization processes hole 14 can be along end plate 11
It is radial to arrange from the inside to the outside.
The washing machine of embodiment according to the present invention is described below.
Washing machine according to an embodiment of the present invention includes steel ladle, rotation bucket and external rotor electric machine.
The rotation bucket is rotatably disposed in the steel ladle.The external rotor electric machine is according to the above-mentioned implementation of the present invention
The external rotor electric machine of example, the stator are connected with the steel ladle, and the rotor is connected with the rotation bucket.
Washing machine according to an embodiment of the present invention, by utilizing external rotor electric machine according to the abovementioned embodiments of the present invention,
Have the advantages that vibration and noise is low etc..
It is understood that the external rotor electric machine that the present invention is protected should not be limited only to the size in above-described embodiment, lead to
It crosses to the size equal proportion or the approximate scaling of equal proportion or the close fine tuning of size, all should be considered as to the close of this patent
It is seemingly or equivalent.
Other compositions of external rotor electric machine and washing machine according to an embodiment of the present invention and operation etc. are general for this field
All be for logical technical staff it is known, be not detailed herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (20)
1. a kind of external rotor electric machine characterized by comprising
Stator, the stator include:
Core, the core include ring part and 27 magnetic poles, and 27 magnetic poles are set around the circumferentially-spaced of the ring part
Set the outer peripheral surface in the ring part；
Three-phase windings, the three-phase windings include the multiple coils for being set around 27 magnetic poles；
Insulator, for making the three-phase windings and 27 pole insulations；
Rotor, the rotor include:
Magnetic conduction hub frame；
Magnetic guiding loop, the magnetic guiding loop are set to the magnetic conduction hub frame and collectively form at least part of the magnetic conduction hub frame
Magnetic yoke portion；
32 magnets, 32 magnets are set to the magnetic yoke portion.
2. external rotor electric machine according to claim 1, which is characterized in that the core with a thickness of 18mm-25mm.
3. external rotor electric machine according to claim 1 or 2, which is characterized in that the ring part it is at least most of by institute
State insulator encapsulation.
4. external rotor electric machine according to claim 3, which is characterized in that the insulator passes through to core carry out portion
Subpackage is covered and injection molding.
5. external rotor electric machine described in any one of -4 according to claim 1, which is characterized in that the interior diameter of the ring part is
120mm~220mm.
6. external rotor electric machine described in any one of -4 according to claim 1, which is characterized in that the interior diameter of the ring part is
190mm~210mm.
7. external rotor electric machine described in any one of -4 according to claim 1, which is characterized in that the ring width of the ring part is
4mm~14mm.
8. external rotor electric machine described in any one of -4 according to claim 1, which is characterized in that the ring width of the ring part is
7mm~11mm.
9. external rotor electric machine according to claim 1, which is characterized in that the core includes multiple stacked bodies, described more
A stacked body is engaged in its end, and each stacked body includes the section and at least one magnetic pole piece extended of the ring part
Point.
10. external rotor electric machine according to claim 9, which is characterized in that the adjacent stacked body is connect by dovetail groove
It closes and constitutes the core.
11. external rotor electric machine according to claim 9, which is characterized in that the core includes 6 stacked bodies,
In 3 stacked bodies respectively there are 3 magnetic poles radially extended, in addition 3 stacked bodies respectively have 6 institutes radially extended
State magnetic pole.
12. external rotor electric machine described in any one of -11 according to claim 1, which is characterized in that the insulator includes being located at
Fixed part on the inside of the core, the fixed part include multiple fastener holes and multiple location holes.
13. external rotor electric machine according to claim 1, which is characterized in that the magnetic conduction hub frame includes:
End plate；
Ring flat-plate portion, the ring flat-plate portion are connected to all edges of the end plate and circularize along the circumferentially extending of the end plate, institute
The inner peripheral surface that magnetic guiding loop is set to the ring flat-plate portion is stated, 32 magnets are set to the inner peripheral surface of the magnetic guiding loop.
14. external rotor electric machine according to claim 13, which is characterized in that the overall diameter of the magnetic guiding loop is greater than the ring
The interior diameter in plate portion is so that the magnetic guiding loop and the ring flat-plate portion are interference fitted.
15. external rotor electric machine according to claim 13, which is characterized in that the magnet is magnet steel, 32 magnet steel
Along the ring flat-plate portion circumferential array and be attached at the inner peripheral surface in the ring flat-plate portion.
16. external rotor electric machine according to claim 12, which is characterized in that the end plate is equipped with injection molding location hole, institute
Stating injection molding location hole is multiple and being provided at circumferentially spaced along the end plate.
17. external rotor electric machine described in any one of -16 according to claim 1, which is characterized in that the magnetic conduction hub frame and institute
Stating magnetic guiding loop is magnetic conductive metal material.
18. external rotor electric machine described in any one of -17 according to claim 1, which is characterized in that the magnetic guiding loop with a thickness of
1.1mm-1.9mm。
19. external rotor electric machine described in any one of -18 according to claim 1, which is characterized in that the rotor further include:
Spline coupling, the spline coupling are installed on the magnetic conduction hub frame and central axis and the magnetic conduction hub frame
Central axis is overlapped.
20. a kind of washing machine characterized by comprising
Steel ladle；
Bucket is rotated, the rotation bucket is rotatably disposed in the steel ladle；
According to claim 1, external rotor electric machine described in any one of -19, the stator are connected with the steel ladle, and described turn
It is sub to be connected with the rotation bucket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811070199.XA CN109274237B (en) | 2018-09-13 | 2018-09-13 | Outer rotor motor and washing machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811070199.XA CN109274237B (en) | 2018-09-13 | 2018-09-13 | Outer rotor motor and washing machine with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
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| CN109274237B CN109274237B (en) | 2020-08-11 |
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| CN201811070199.XA Active CN109274237B (en) | 2018-09-13 | 2018-09-13 | Outer rotor motor and washing machine with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111106680A (en) * | 2020-01-07 | 2020-05-05 | 湖州南洋电机有限公司 | Motor for washing machine |
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| CN111106680B (en) * | 2020-01-07 | 2021-05-25 | 湖州南洋电机有限公司 | Motor for washing machine |
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| CN109274237B (en) | 2020-08-11 |
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