CN205195443U - Single -Phase permanent -Magnet motor - Google Patents
Single -Phase permanent -Magnet motor Download PDFInfo
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- CN205195443U CN205195443U CN201520666897.1U CN201520666897U CN205195443U CN 205195443 U CN205195443 U CN 205195443U CN 201520666897 U CN201520666897 U CN 201520666897U CN 205195443 U CN205195443 U CN 205195443U
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Abstract
The utility model provides a single -Phase permanent -Magnet motor, including the rotor of stator with stator rotation relatively, the stator includes stator core and winds locates the winding on the stator core, stator core includes outer loop portion, follow a plurality of wire winding portions that outer loop portion inwards stretches out, from every wire winding portion end was to two weeks end terminals of stretching of side, the winding is around locating in the corresponding wire winding portion, the rotor accept in in the space that the end terminal encloses, the rotor includes the edge the permanent -magnet pole that rotor circumference set up, permanent -magnet pole peripheral surface is surperficial concentric with interior week of end terminal to even air gap is formed between the two, it is adjacent form the groove opening between the end terminal, groove open -ended width is greater than 0, and is less than or equal to 4 times of even air gap thickness. The utility model discloses a single -Phase permanent -Magnet motor starts with the operation more steadily, has strengthened the stability that starts.
Description
Technical field
The utility model relates to a kind of electric machine, particularly relates to a kind of electric machine with channel opening.
Background technology
The motor stator core of the electric machine of prior art adopts monolithic construction, and namely the outer portion of stator core and teeth portion are molded as one formula structure simultaneously, establish notch so that coiling between the pole shoe of adjacent fingers.The electric machine of this kind of structure, the existence due to notch can cause motor to produce larger location torque, thus produces vibrations and noise.And by the restriction of notch, positioning starting angle is little, start poor reliability.
In view of this, the utility model aims to provide a kind of electric machine of novel improved startup reliability.
Utility model content
The utility model provides a kind of electric machine, comprise stator and can relative stator rotate rotor; Described stator comprises stator core and is set around the winding on stator core, the pole shoe that described stator core comprises outer portion, stretch to two weeks sides from some winding sections that described outer portion is inwardly stretched out, from each described winding section end, described winding is set around on corresponding winding section; Described rotor is contained in the space that described pole shoe surrounds; It is characterized in that: described rotor comprises the some permanent-magnet poles arranged along described periphery of rotor, each permanent-magnet pole outer surface is concentric with pole shoe inner peripheral surface, thus forms even air gap between; Form channel opening between adjacent described pole shoe, the width of described channel opening is greater than 0, and is less than or equal to 4 times of described even air gap thickness.
As a kind of improvement project, described some permanent-magnet poles are formed by annular permanent magnet; The periphery of described rotor magnetic core; The outer surface of described rotor magnetic core is provided with some axially extended grooves, and each groove is positioned at the boundary of two permanent-magnet poles.
As a kind of improvement project, described rotor comprises rotor magnetic core; Some permanent-magnet poles of described rotor are formed by the some permanent magnets being embedded into described rotor magnetic core.
As a kind of improvement project, described rotor comprises rotor magnetic core, and described some permanent-magnet poles are formed by some permanent magnets of the outer surface being installed to described rotor magnetic core; The outer surface of described rotor magnetic core is provided with some axially extended grooves, and each groove is positioned at the boundary of two permanent-magnet poles.
As a kind of improvement project, the width of described channel opening is greater than 0, and is less than or equal to 4 times of the thickness of described even air gap.As a kind of improvement project, described channel opening is positioned at the centre position of adjacent winding section.
As a kind of improvement project, the radial thickness of described pole shoe reduces gradually from described winding section to the direction of described channel opening.
As a kind of improvement project, the pole shoe between adjacent described winding section is provided with location notch, described location notch axially being formed continuously or gap-forming along motor, and each described location notch is not identical to the distance of adjacent two described winding sections.
As a kind of improvement project, the quantity of described location notch is equal with the number of poles of described permanent-magnet pole or become integral multiple.
As a kind of improvement project, described location notch is between the outer surface and inner peripheral surface of described pole shoe.
As a kind of improvement project, described location notch is exposed to the inner peripheral surface of described pole shoe.
Alternatively, described location notch is exposed to the outer surface of described pole shoe.
As a kind of improvement project, described stator core is spliced along stator circumference by some core assemblies, and each described core assembly comprises one section of arc yoke portion, stretches out described winding section from described arc yoke portion, stretch out described pole shoe from the radial extremity of described winding section to circumferential both sides.
As a kind of improvement project, the joint in the arc yoke portion of adjacent described core assembly is provided with concaveconvex structure.
As a kind of improvement project, the joint in the arc yoke portion of adjacent described core assembly is plane.
As a kind of improvement project, described channel opening is positioned at the centre position of adjacent winding section.
Electric machine of the present utility model has even air gap, and adjacent stators pole shoe between channel opening be less than or equal to 4 times of even air gap thickness, make the startup of motor and running more steady, enhance the startup stability of motor, reduce or eliminate possible startup dead point.
In order to further understand feature of the present utility model and technology contents, refer to following about detailed description of the present utility model and accompanying drawing, but institute's accompanying drawing only provide reference and explanation use, is not used for being limited the utility model.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the electric machine of the utility model one better embodiment;
Fig. 2 is the schematic diagram after electric machine shown in Fig. 1 removes shell;
Fig. 3 is the rough schematic view that electric machine shown in Fig. 1 removes after shell, winding, rotor shaft etc.
Fig. 4 is the schematic diagram of the stator core of the electric machine shown in Fig. 1.
Fig. 5 is the rotor magnetic core of the electric machine shown in Fig. 1 and the schematic diagram of permanent magnet thereof.
Fig. 6 is the torque variation curve chart of electric machine in rotation process of Fig. 1.
Fig. 7 is the schematic diagram of the stator core of the electric machine of the utility model second embodiment.
Fig. 8 is the schematic diagram of the stator core of the electric machine of the utility model the 3rd embodiment.
Fig. 9 is the schematic diagram of the stator core of the electric machine of the utility model the 4th embodiment, rotor magnetic core and permanent magnet thereof.
Embodiment
Below in conjunction with accompanying drawing, by describing in detail embodiment of the present utility model, will make the technical solution of the utility model and other beneficial effects apparent.Accompanying drawing only provides reference and explanation use, is not used for being limited the utility model.The size shown in accompanying drawing is only used to be convenient to clear description, and does not limit proportionate relationship.
First embodiment
Refer to Fig. 1 to Fig. 5, the electric machine 10 of the utility model one better embodiment comprises the rotor 50 of stator 20 and relative stator rotation.
This stator 20 comprise the cylindrical case 21 of one end open, the end cap 23 being installed to shell 21 openend, the stator core 30 be installed in shell 21, be installed to stator core 30 insulation coil holder 40 and to be set around on stator core 30 and the winding 39 supported by insulation coil holder 40.Wherein, the pole shoe 35 that this stator core 30 comprises outer portion 31, stretch to two weeks sides from some winding sections 33 that outer portion 31 is inwardly stretched out, from each winding section 33 end, winding 39 is set around on corresponding winding section 33, and the coil holder 40 that insulated between winding 39 and stator core 30 is isolated.
In the space that the pole shoe 35 that rotor 50 is contained in some winding sections surrounds, rotor 50 comprises the some permanent-magnet poles arranged along described periphery of rotor, each annular permanent magnet pole outer surface is concentric with pole shoe inner peripheral surface, thus forming basic even air gap 41 between, the alleged basic even air gap of the application refers to that the part of air gap except corresponding location notch 38, slot 37 and permanent-magnet pole end chamfered part between permanent-magnet pole outer surface with pole shoe inner peripheral surface is even air gap.Particularly, the inner surface of this pole shoe is positioned at on the concentric circles that is the center of circle of rotor 50 center.The outer surface 56 of permanent-magnet pole 55 in cylindric, and is positioned at on the concentric circles that is the center of circle of rotor 50 center, that is, pole shoe inner peripheral surface is concentric with the outer surface of permanent-magnet pole 55, thus forms even air gap between pole shoe inner peripheral surface, permanent-magnet pole outer surface.
As shown in Figure 5, each permanent-magnet pole 55 in the present embodiment is formed by one of correspondence piece of permanent magnet 56, can certainly be formed by polylith permanent magnet 56.These some pieces of annular permanent magnets 56 are installed to the outer surface of rotor magnetic core 53 or are embedded into rotor magnetic core; The outer surface of this rotor magnetic core is provided with some axially extended grooves 54, and each groove 54 is positioned at the boundary of two permanent-magnet poles 56, to reduce magnetic dispersion.Ring portion alleged by the utility model refers to the enclosed construction circumferentially extended continuously.
Rotor 50 also comprises rotating shaft 51, and rotating shaft 51 is passed rotor magnetic core 53 and is fixed together with it.One end of rotating shaft 51 is installed to the end cap 23 of stator by bearing 24 (see Fig. 1), and the other end is installed to the bottom of the cylindrical case 21 of stator by another bearing, thus realize rotor can relative to stator rotation.
This stator core 30 is made up of the soft magnetic material with magnetic property, such as by magnetic conduction chip (industry commonly uses silicon steel sheet) along motor shaft to being laminated.In stator core 30, form channel opening 37 between adjacent pole shoe 35, preferably, each channel opening 37 is positioned at the centre position of two adjacent winding sections 33.The width of this channel opening 37 is greater than 0, and is less than or equal to 4 times of this even air gap 41 thickness.Under this configuration, the magnetic resistance sudden change that notch causes can be reduced, thus the location torque of level and smooth motor, improve positional accuracy, make the startup of motor and rotation more reliable level and smooth.Ring portion alleged by the utility model refers to the enclosed construction circumferentially extended continuously, comprises annular, square, polygon etc.; The thickness of air gap 41 refers to the radial thickness of air gap.
Preferably, the radial thickness of pole shoe 35 reduces gradually from winding section 33 to the direction of channel opening 37, the magnetic resistance of pole shoe 35 is increased gradually from winding section to the direction of channel opening 37, form the magnetic bridge that magnetic resistance increases gradually, thus the location torque of level and smooth motor, improve positional accuracy, make the startup of motor and rotation more reliable level and smooth.
In the present embodiment, the pole shoe 35 between adjacent described winding section is provided with location notch 38, and the number of location notch 38 is equal with the number of poles of the number of poles of stator, annular permanent magnet pole or become integral multiple, such as 2 times, 3 times etc., is 4 in the present embodiment.In the present embodiment, stator winding adopts centralized winding, and therefore, winding section quantity equals the number of poles of stator.In alternative, winding section quantity can be the integral multiple of stator poles, such as 2 times, 3 times etc.
In the present embodiment, location notch 38 along motor shaft to continuous setting, and is positioned in the inner peripheral surface of pole shoe.In an alternative, described location notch 38 is arranged along motor axially spaced-apart.Preferably, each location notch 38 is unequal to the distance of adjacent two winding sections.
When motor is in non-"on" position and initial condition, the centre line L 1 of rotor magnetic pole departs from centre line L 2 certain angle in corresponding stator winding portion, and the angle Q that above-mentioned L1 and L2 is formed is called startup angle.In the present embodiment, this startup angle is greater than 30 degree of electrical degrees and is less than 150 degree of electrical degrees, and when motor stator winding passes to the electric current in a direction, rotor 50 can start from a direction; When motor stator winding passes to rightabout electric current, rotor 50 can start the other way around.Understandably, when starting angle and equaling 90 degree of electrical degrees (also namely the center of rotor magnetic pole overlaps with the symmetrical centre of adjacent winding section 33), rotor 50 starts all than being easier to towards both direction, also namely the most easily realizes twocouese and starts.When starting angle and departing from 90 degree of electrical degrees, a rotor court wherein direction startup can be easier to than starting towards other direction.
Fig. 6 be the motor of above-described embodiment at the location torque change curve in rotation process that is not energized, abscissa represents rotational angle; Ordinate represents torque.Can see, motor be not energized in rotation process, and the location torque change curve of motor is smoother, and thus anchor point is accurate, avoids and starts dead point, improve the reliability of electric motor starting.
Second embodiment
Please refer to Fig. 7, with a upper embodiment unlike, in order to improve the winding efficiency of winding 39, stator core 30 is spliced along stator circumference by some core assemblies 300, and each core assembly 300 comprises one section of arc yoke portion 300b, stretches out winding section 33 from arc yoke portion 300b, stretches out pole shoe 35 from radial extremity in winding section 33 to circumferential both sides.In the present embodiment, each core assembly 300 has a winding section 33 and corresponding pole shoe 35.Understandably, each core assembly also can have winding section 33 more than 1 and corresponding pole shoe 35.After the winding of each core assembly completes, this some core assembly 300 is stitched together, thus obtains the stator core 30 with stator winding.
The joint in the arc yoke portion of adjacent magnetic core assembly is provided with concaveconvex structure.Specifically, when arranging embossed card buckle structure, groove screens 34 can be set each core assembly respectively for the two ends in the arc yoke portion being spliced into outer portion, and the protruding buckle 32 matched with this groove screens 34; This groove screens 34 is embossed card mouth structure with this protruding buckle 32; When assembling, the protruding buckle 32 of each core assembly matches with the groove screens 34 of adjacent core assembly, and the groove screens 34 of each core assembly matches with the protruding buckle 32 of adjacent core assembly.
Because stator core 30 is spliced by some core assemblies 300, therefore, the width of the channel opening 37 between adjacent pole shoe 35 can be very little.In the utility model, the width of channel opening 37 refers to the distance between adjacent two pole shoes 35.
3rd embodiment
Please refer to Fig. 8, with the second embodiment unlike, in the present embodiment, the joint in the arc yoke portion of adjacent magnetic core assembly is plane, now can by welding mode the joint in arc yoke portion is welded together.
4th embodiment
Please refer to Fig. 9, in the present embodiment, pole shoe 35 between adjacent described winding section is provided with location notch 38 equally, unlike, i.e. stealthy location notch between the outer surface of the internal ring portion that the location notch 38 in the present embodiment is formed by connecting at the pole shoe by some winding sections and inner peripheral surface, preferably, near the inner peripheral surface of internal ring portion.
In the present embodiment, rotor 60 comprises rotor magnetic core 63 and annular permanent magnet pole 65, and wherein annular permanent magnet pole 65 is formed by annular permanent magnet, and be such as one piece of annular permanent magnet, annular permanent magnet is installed to the outer surface of rotor core 53; The outer surface of this rotor core same is provided with some axially extended grooves 64, and each groove 64 is positioned at the boundary of two permanent-magnet poles, to reduce magnetic dispersion.
The electric machine that the utility model provides forms channel opening between adjacent pole shoe, and makes the width of this channel opening be greater than 0, and is less than or equal to 4 times of this air gap thickness, can reduce the magnetic resistance sudden change that notch causes, thus the location torque of level and smooth motor; The utility model also makes the outer surface of permanent-magnet pole be positioned on the same face of cylinder, thus makes the thickness of air gap homogeneous, forms basic even air gap, improves air gap flux density, improve the stability of power of motor density and start-up and operation.The electric machine that the utility model embodiment is lifted, during startup, required starting angular and location torque can carry out design modifying on demand easily, thus improve startup optimization performance, as can be conveniently adjusted electric motor starting angle by the position of adjustment pole shoe depression, by the size of the location torque before the shape of adjustment pole shoe location notch, size, quantity, the whole electric motor starting of depth adjustable; Stator core adopts split-type structural, thus makes high-speed winding machine can be adopted to carry out coiling before winding section and outer portion are assembled, and coiling production efficiency is high.
In above-described embodiment, fluting 37 has uniform circumferential width.Understandable, as an alternative, the width of each fluting 37 also can be uneven, as inner small and outside big tubaeform also can, now, the width of aforementioned alleged fluting 37 refers to its minimum widith.In above-described embodiment, fluting 37 is arranged along motor radial direction, and as an alternative, fluting 37 also can be arranged along the direction of departing from motor radial direction.
This is only preferred embodiment of the present utility model above, not in order to limit the utility model, all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (14)
1. an electric machine, comprise stator and can relative stator rotate rotor; Described stator comprises stator core and is set around the winding on stator core, the pole shoe that described stator core comprises outer portion, stretch to two weeks sides from some winding sections that described outer portion is inwardly stretched out, from each described winding section end, described winding is set around on corresponding winding section; Described rotor is contained in the space that described pole shoe surrounds; It is characterized in that: described rotor comprises the some permanent-magnet poles arranged along described periphery of rotor, each permanent-magnet pole outer surface is concentric with pole shoe inner peripheral surface, thus forms basic uniform air gap between; Form channel opening between adjacent described pole shoe, the width of described channel opening is greater than 0, and is less than or equal to 4 times of described even air gap thickness.
2. electric machine as claimed in claim 1, it is characterized in that, described rotor comprises rotor magnetic core, and described some permanent-magnet poles are formed by the annular permanent magnet being fixed to rotor magnetic core outer surface.
3. electric machine as claimed in claim 1, it is characterized in that, described rotor comprises rotor magnetic core, and some permanent-magnet poles of described rotor are formed by the some permanent magnets being embedded into described rotor magnetic core.
4. electric machine as claimed in claim 1, it is characterized in that, described rotor comprises rotor magnetic core, and described some permanent-magnet poles are formed by some permanent magnets of the outer surface being installed to described rotor magnetic core; The outer surface of described rotor magnetic core is provided with some axially extended grooves, and each groove is positioned at the boundary of two permanent-magnet poles.
5. electric machine as claimed in claim 1, it is characterized in that, the width of described channel opening is greater than 0 and is less than or equal to 2 times of described even air gap thickness.
6. electric machine as claimed in claim 1, is characterized in that, described channel opening is positioned at the centre position of adjacent winding section or departs from centre position towards the direction away from location notch.
7. electric machine as claimed in claim 1, it is characterized in that, the radial thickness of described pole shoe reduces gradually from described winding section to the direction of described channel opening.
8. electric machine as claimed in claim 1, it is characterized in that, pole shoe between adjacent described winding section is provided with location notch, described location notch axially being formed continuously or gap-forming along motor, and each described location notch is not identical to the distance of adjacent two described winding sections.
9. electric machine as claimed in claim 8, it is characterized in that, the quantity of described location notch is equal with the number of poles of described permanent-magnet pole or become integral multiple.
10. electric machine as claimed in claim 8, it is characterized in that, described location notch is stealthy location notch.
11. electric machine as claimed in claim 8, it is characterized in that, described location notch is exposed to the inner peripheral surface of described pole shoe.
12. electric machine as claimed in claim 1, it is characterized in that, described stator core is spliced along stator circumference by some core assemblies, and each described core assembly comprises one section of arc yoke portion, stretches out described winding section from described arc yoke portion, stretch out described pole shoe from the radial extremity of described winding section to circumferential both sides.
13. electric machine as claimed in claim 12, is characterized in that, the joint in the arc yoke portion of adjacent described core assembly is provided with concaveconvex structure.
14. electric machine as claimed in claim 12, is characterized in that, the joint in the arc yoke portion of adjacent described core assembly is plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520666897.1U CN205195443U (en) | 2015-08-28 | 2015-08-28 | Single -Phase permanent -Magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520666897.1U CN205195443U (en) | 2015-08-28 | 2015-08-28 | Single -Phase permanent -Magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195443U true CN205195443U (en) | 2016-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520666897.1U Active CN205195443U (en) | 2015-08-28 | 2015-08-28 | Single -Phase permanent -Magnet motor |
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| CN (1) | CN205195443U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106487118A (en) * | 2015-08-28 | 2017-03-08 | 德昌电机(深圳)有限公司 | Electric machine |
| CN107968499A (en) * | 2016-10-20 | 2018-04-27 | 广东德昌电机有限公司 | A kind of external rotor electric machine |
| US11245293B2 (en) | 2019-08-14 | 2022-02-08 | Industrial Technology Research Institute | Motor stator with dovetail or rectangular mount structure and stator teeth airgap width ratio |
-
2015
- 2015-08-28 CN CN201520666897.1U patent/CN205195443U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106487118A (en) * | 2015-08-28 | 2017-03-08 | 德昌电机(深圳)有限公司 | Electric machine |
| CN107968499A (en) * | 2016-10-20 | 2018-04-27 | 广东德昌电机有限公司 | A kind of external rotor electric machine |
| US11245293B2 (en) | 2019-08-14 | 2022-02-08 | Industrial Technology Research Institute | Motor stator with dovetail or rectangular mount structure and stator teeth airgap width ratio |
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| C14 | Grant of patent or utility model | ||
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