CN105262246A - Long strip-shaped silicon steel punching sheet of brushless DC motor and stator comprising same - Google Patents
Long strip-shaped silicon steel punching sheet of brushless DC motor and stator comprising same Download PDFInfo
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- CN105262246A CN105262246A CN201510650903.9A CN201510650903A CN105262246A CN 105262246 A CN105262246 A CN 105262246A CN 201510650903 A CN201510650903 A CN 201510650903A CN 105262246 A CN105262246 A CN 105262246A
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Abstract
The invention relates to a long strip-shaped silicon steel punching sheet of a brushless DC motor and a stator core comprising the same. The long strip-shaped silicon steel punching sheet is in the shape of a long strip, and is divided into a plurality of punching sheet units. Each punching sheet unit comprises a stator outer ring portion, a stator winding bracket and a stator yoke. The stator outer ring portions of the punching sheet units are mutually connected into an integral whole. One end of the integrally connected stator outer ring portions is provided with a connecting male tenon, and the other end is provided with a connecting female tenon. Each punching sheet unit is provided with a lamination connecting hole. The stator core is formed by laminating the long strip-shaped silicon steel punching sheet, the laminated long strip-shaped silicon steel punching sheet is bent into a circle and fixed through insulating pins inserted into the lamination connecting holes. Two ends of the long strip-shaped silicon steel punching sheet are connected through buckling the connecting male tenon and the connecting female tenon. The beneficial effects are that a lot of materials can be saved, the eddy current loss is reduced, the efficiency of the brushless DC motor is improved, electricity of an electric vehicle is enabled to be saved by 20%, enterprises are helped to create high-efficiency motor brands, and higher income is acquired.
Description
Technical field
The present invention relates to brshless DC motor technical field, particularly a kind of strip silicon steel punching of brshless DC motor and the stator core of formation thereof.
Background technology
Electric motor car, to make electricity consumption as driving, is being widely used nearly ten years, and replace in the process of bicycle in electric motor car, the efficiency improving brshless DC motor is the target always pursued.Although brush motor driving moment is large, due to the fretting wear brush between brush and stators and rotators, change brush and quite bother, do not contact suddenly if add power up brush, will electric spark be produced, in the electric motor car of practicality, all adopt brushless type DC motor.For brushless type DC motor, because rotor rotates in magnetic field, produce eddy electric field, form eddy current, rotor, stator are generated heat, reduces the efficiency of brshless DC motor, generally adopt silicon steel sheet stack of sheets mode to reduce eddy current in the prior art.And the thinner then electric efficiency of silicon steel sheet is higher.Therefore the electric efficiency that the silicon steel sheet that label is little is made is higher.In addition, the efficiency factor affecting direct current machine also has a lot, drive air to rotate when having mechanical rotation to wear and tear and rotate and form wind, the efficiency of motor can be reduced, therefore the air gap between stator and rotor can performance ground little, require that rotating shaft is without acceptance of persons solid, the place that the rotor of stator is adjoining is isocentric circular arc; Stator is made up of some groups of copper core circles, because copper cash exists resistance, Joule heat can be produced after energising, this Joule heat is proportional to added voltage, be inversely proportional to the resistance of coil, therefore for improving electrode efficiency, adopting the mode reducing the magnitude of voltage be added on coil on the one hand, is exactly use the mode of thicker copper cash to reduce Joule heat on the other hand; The iron loss of rotor and stator is also very important problem, because stator is made up of some groups of coils, to reduce the magnitude of voltage on each coil, but adjacent two coil magnetic field polarity are contrary, change in gradient, when rotor cuts this regional magnetic field line at coil and the adjoining local magnetic field of rotor, the induced electromotive force changed, this induced electromotive force forms induced current in rotor, can excite magnetic field again, cause in stator and produce eddy current in silicon steel sheet.Therefore stator silicon steel sheet also adopts stacked system, to reduce eddy current; Also have casing if steel also can produce casing loss, therefore adopt the plastics that thermal capacity is higher, the Joule heat of a part of rotor and stator generation can be absorbed.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of strip silicon steel punching of brshless DC motor and the stator core of formation thereof, improves the efficiency of motor.
The technical solution adopted for the present invention to solve the technical problems is: a kind of strip silicon steel punching of brshless DC motor, elongated, and be divided into and organize punching sheet unit more, each group punching sheet unit all comprises stator outer ring portion, stator winding frame and stator yoke, stator yoke is connected with the top of stator winding frame, stator outer ring portion is connected with the root of stator winding frame, the stator outer ring portion of punching sheet unit is connected to each other and is integrated, and the connection gap being convenient to this strip silicon steel punching bending is set between the stator outer ring portion of adjacent punching sheet unit, have in the one end in the stator outer ring portion connected as one and connect public tenon, the other end has the female tenon of connection, punching sheet unit has lamination connecting hole.
Further restriction, lamination connecting hole is positioned at the root of stator winding frame, and three outward flanges of lamination connecting hole and punching sheet unit adjacent thereto are apart from equal.
Further restriction, connecting gap is that V-shaped connects gap.
A kind of stator core of brshless DC motor, formed by strip silicon steel punching lamination, strip silicon steel punching after lamination bends to circle, and is fixed by the insulation pin filling in lamination connecting hole, and the two ends of strip silicon steel punching are by connecting male tenon and being connected female tenon and being fastened and connected.
The invention has the beneficial effects as follows: can lot of materials be saved, reduce eddy current loss, improve the efficiency of brshless DC motor, make electric motor car can economize on electricity 20%, help enterprise's Creating High Efficiency motor famous brand, obtain higher income.
Accompanying drawing explanation
Fig. 1 be strip silicon steel punching of the present invention overlook view;
Fig. 2 is the side-looking view of strip silicon steel punching of the present invention;
Fig. 3 is the structural representation of the brake forming of strip silicon steel punching of the present invention;
Fig. 4 is the structural representation of the punching sheet unit of strip silicon steel punching of the present invention;
In figure, 1. stator yoke, 2. stator winding frame, 3. connect female tenon, 4. lamination connecting hole, 5. connects gap, 6. connects public tenon, 7. insulate pin, 8. stator outer ring portion.
Embodiment
As Fig. 1, shown in 2 and 4, a kind of strip silicon steel punching of brshless DC motor, elongated, and be divided into and organize punching sheet unit more, each group punching sheet unit all comprises stator outer ring portion 8, stator winding frame 2 and stator yoke 1, stator yoke 1 is connected with the top of stator winding frame 2, stator outer ring portion 8 is connected with the root of stator winding frame 2, the stator outer ring portion 8 of punching sheet unit is connected to each other and is integrated, and the connection gap 5 being convenient to this strip silicon steel punching bending is set between the stator outer ring portion 8 of adjacent punching sheet unit, have in the one end in the stator outer ring portion 8 connected as one and connect public tenon 6, the other end has the female tenon 3 of connection, punching sheet unit has lamination connecting hole 4.
As shown in Figure 3, a kind of stator core of brshless DC motor, formed by strip silicon steel punching lamination, strip silicon steel punching after lamination bends to circle, and fixed by the insulation pin 7 filling in lamination connecting hole 4, the two ends of strip silicon steel punching are fastened and connected by connecting male tenon 6 and being connected female tenon 3, connecting when connection female tenon 3 filled in by male tenon 6 needs by external force.
The silicon steel sheet stack of sheets principle of brshless DC motor is have followed when designing the stator core of the strip silicon steel punching of this brshless DC motor and formation thereof; Rotor and stator adjacent minimum gap space principle; Drum stand slug size minimum principle; Eddy current loss minimum principle.
The circular arc of the stator yoke 1 of the strip silicon steel punching of this brshless DC motor and rotor are concentric circles.
The width of stator yoke 1 is wide as far as possible, because after bending strip silicon steel punching, the gap existed between stator yoke 1 also can reduce the operating efficiency of motor, do not affect this gap under the prerequisite of enamelled wire can be little as much as possible, to ensure maximum operating efficiency.
Stator winding frame 2 is thin as far as possible, prevent larger eddy current, because adjacent two coil magnetic field polarity are contrary, change in gradient at coil and the adjoining local magnetic field of rotor, when rotor cuts this regional magnetic field line, the induced electromotive force changed, this induced electromotive force forms induced current in rotor, magnetic field can be excited again, cause in stator and produce eddy current in silicon steel sheet, electric bicycle simultaneously, electric automobile in the process of moving, can accelerate or slow down, therefore added on coil voltage transient can become large or diminish, self induction electromotive force can be produced to coil, form eddy current, cause heating.
Lamination connecting hole 4 is positioned at the root of stator winding frame 2, and three outward flanges of lamination connecting hole 4 and punching sheet unit adjacent thereto are apart from equal.Lamination connecting hole 4 is under guarantee strip silicon steel punching strength of parts prerequisite, large as far as possible, reduces eddy current so to the full extent.
Connect gap 5 and connect gap for V-shaped, connect gap 5 and mainly guarantee that drum stand 2 can bend to a circle.
Adopt strip silicon steel punching to bend to stator silicon steel sheet circle, and directly strike out compared with whole stator silicon steel sheet circle, both saved lot of materials, and reduced eddy current loss again.
Embodiment:
As shown in Figure 4, strip silicon steel punching is by 18 groups of punching sheet units, often group is equivalent to the fan-shaped part that central angle is 20 degree, long 17.4 units of each stator winding frame 2, wide 26 units, cut out the circle that diameter is 5 units in stator winding frame 2, form lamination connecting hole 4, for filling in insulation pin 7; As shown in Figure 3, it is 100 units that strip silicon steel punching bends to outside diameter, and Inner arc diameter is the stator silicon steel sheet circle of 48 units.Each unit is 0.8mm.
Claims (4)
1. the strip silicon steel punching of a brshless DC motor, it is characterized in that: elongated, and be divided into and organize punching sheet unit more, each group punching sheet unit all comprises stator outer ring portion (8), stator winding frame (2) and stator yoke (1), stator yoke (1) is connected with the top of stator winding frame (2), stator outer ring portion (8) is connected with the root of stator winding frame (2), the stator outer ring portion (8) of punching sheet unit is connected to each other and is integrated, and the connection gap (5) being convenient to this strip silicon steel punching bending is set between the stator outer ring portion (8) of adjacent punching sheet unit, have in the one end in the stator outer ring portion (8) connected as one and connect public tenon (6), the other end has the female tenon of connection (3), punching sheet unit has lamination connecting hole (4).
2. the strip silicon steel punching of brshless DC motor according to claim 1, it is characterized in that: described lamination connecting hole (4) is positioned at the root of stator winding frame (2), and three outward flanges of lamination connecting hole (4) and punching sheet unit adjacent thereto are apart from equal.
3. the strip silicon steel punching of brshless DC motor according to claim 1, is characterized in that: described connection gap (5) is V-shaped connection gap.
4. the stator core of a brshless DC motor, it is characterized in that: formed by the strip silicon steel punching lamination described in claim 1 or 2 or 3, strip silicon steel punching after lamination bends to circle, and fixed by the insulation pin (7) of filling in lamination connecting hole (4), the two ends of strip silicon steel punching are by connecting male tenon (6) and being connected female tenon (3) and being fastened and connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510650903.9A CN105262246A (en) | 2015-10-10 | 2015-10-10 | Long strip-shaped silicon steel punching sheet of brushless DC motor and stator comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510650903.9A CN105262246A (en) | 2015-10-10 | 2015-10-10 | Long strip-shaped silicon steel punching sheet of brushless DC motor and stator comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105262246A true CN105262246A (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510650903.9A Pending CN105262246A (en) | 2015-10-10 | 2015-10-10 | Long strip-shaped silicon steel punching sheet of brushless DC motor and stator comprising same |
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| Country | Link |
|---|---|
| CN (1) | CN105262246A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130204A (en) * | 2016-07-21 | 2016-11-16 | 珠海凌达压缩机有限公司 | Motor, stator core and stator punching sheet thereof |
| CN112994403A (en) * | 2021-04-26 | 2021-06-18 | 合肥工业大学 | Primary structure of low-eddy-current-loss tooth-groove-type cylindrical linear motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0779551A (en) * | 1993-09-09 | 1995-03-20 | Sankyo Seiki Mfg Co Ltd | Manufacture of iron core for electric appliance |
| CN2678232Y (en) * | 2003-06-20 | 2005-02-09 | 印辉 | DC. brushless electric machine stator |
| CN101409468A (en) * | 2008-07-30 | 2009-04-15 | 珠海格力电器股份有限公司 | Stator core and method for manufacturing same |
| JP2014117043A (en) * | 2012-12-07 | 2014-06-26 | Samsung R&D Institute Japan Co Ltd | Motor |
| CN104143886A (en) * | 2014-07-30 | 2014-11-12 | 广东威灵电机制造有限公司 | Machining method for stator punching sheet |
-
2015
- 2015-10-10 CN CN201510650903.9A patent/CN105262246A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0779551A (en) * | 1993-09-09 | 1995-03-20 | Sankyo Seiki Mfg Co Ltd | Manufacture of iron core for electric appliance |
| CN2678232Y (en) * | 2003-06-20 | 2005-02-09 | 印辉 | DC. brushless electric machine stator |
| CN101409468A (en) * | 2008-07-30 | 2009-04-15 | 珠海格力电器股份有限公司 | Stator core and method for manufacturing same |
| JP2014117043A (en) * | 2012-12-07 | 2014-06-26 | Samsung R&D Institute Japan Co Ltd | Motor |
| CN104143886A (en) * | 2014-07-30 | 2014-11-12 | 广东威灵电机制造有限公司 | Machining method for stator punching sheet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130204A (en) * | 2016-07-21 | 2016-11-16 | 珠海凌达压缩机有限公司 | Motor, stator core and stator punching sheet thereof |
| CN112994403A (en) * | 2021-04-26 | 2021-06-18 | 合肥工业大学 | Primary structure of low-eddy-current-loss tooth-groove-type cylindrical linear motor |
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Application publication date: 20160120 |
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| RJ01 | Rejection of invention patent application after publication |