CN203707896U - Brushless motor stator - Google Patents
Brushless motor stator Download PDFInfo
- Publication number
- CN203707896U CN203707896U CN201320773780.4U CN201320773780U CN203707896U CN 203707896 U CN203707896 U CN 203707896U CN 201320773780 U CN201320773780 U CN 201320773780U CN 203707896 U CN203707896 U CN 203707896U
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- CN
- China
- Prior art keywords
- magnetic conduction
- wire winding
- conduction sheet
- brushless motor
- stator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Brushless Motors (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model relates to the field of a motor and especially relates to a brushless motor stator. The brushless motor stator comprises a stator core having a hollow structure, an inner edge of the stator core is provided with wire winding rods extending inwardly, wire winding grooves are formed between the wire winding rods, end parts of the wire winding rods are provided with extending parts, inclined angles between the extending parts and side edges of the wire winding rods are obtuse angles, and end parts of the extending parts are provided with symmetrical grooves taking the wire winding rods as central lines; and the brushless motor stator further comprises magnetic conduction sheets fixedly arranged at opening positions of the wire winding grooves, each magnetic conduction sheet comprises magnetic conduction sheet insertion ends and a magnetic conduction sheet block part, and each magnetic conduction sheet block part matches the dimension of each wire winding groove opening. Through adoption of the structure, influences of higher harmonics, which are generated when a motor works, on motor running are reduced, and output power of the motor is improved. The stator structure forms a structure without grooves, so an air-gap magnetic field between the stator and a rotor is uniformly distributed, a cogging torque of the brushless motor is greatly reduced, and thus noises of the brushless motor are reduced.
Description
Technical field
The utility model relates to machine field, particularly a kind of brushless motor stator.
Background technology
Brushless electric machine is widely used because of advantages such as it has brushless, low interference, smooth and easy, the low noise of turning round, the life-span are long, maintenance cost is low.Existing brushless motor stator is generally the structure of similar hollow cylinder, sidewall is provided with the wire winding pole extending internally therein, and the space between wire winding pole is winding slot, produces high order harmonic component when machine operation, electric machine rotation is exerted an influence, cause affecting the power output of motor.Brushless electric machine is due to machinery-free commutating structure, and brshless DC motor is, by automatically controlled PWM pulse-width modulation, direct current modulation is obtained to alternating current approx, realizes motor commutation.In the alternating current that modulation obtains, contain a large amount of harmonic waves, can be by improving PWM chopping frequency in low-power machine, chopping frequency is adjusted to 20KHz, make high frequency noise in ultrasonic wave district, people's ear cannot be distinguished, thereby reach the object that reduces noise, but in heavy-duty motor, heighten chopping frequency and can cause motor torque shakiness, there is step-out risk, therefore can only be in optimizing driver in heavy-duty motor, revise as much as possible electric machine structure, the harmonic wave in cogging torque and the back electromotive force of reduction motor.
Summary of the invention
The purpose of this utility model is to provide the brushless motor stator that a kind of power output is high, noise is little.
The technical solution of the utility model is as follows: brushless motor stator, comprise stator core, stator core is hollow structure, the inner edge of described stator core is provided with the wire winding pole extending internally, between wire winding pole, form winding slot, it is characterized in that: the end of wire winding pole is provided with extension, the angle of the side of extension and wire winding pole is obtuse angle, the end of extension is provided with the groove with wire winding pole center line symmetry, also comprise the magnetic conduction sheet that is fixed at winding slot opening part, described magnetic conduction sheet comprises magnetic conduction sheet insertion end and magnetic conduction sheet stop part, the size of magnetic conduction sheet stop part and winding slot opening matches.On the extension of winding slot opening part both sides, be respectively equipped with magnetic conduction sheet holddown groove, described magnetic conduction sheet insertion end is inserted in magnetic conduction sheet holddown groove, and both are interference fit.
Described magnetic conduction sheet stop part is plane.
Described magnetic conduction sheet stop part be shaped as arc, the shape of described arc is consistent with the shape of stator core internal face.
The excircle of described stator core is provided with covered plastics layer.
The end of wire winding pole is provided with extension, the angle of the side of extension and wire winding pole is obtuse angle, the end of extension is provided with the groove with wire winding pole center line symmetry, the impact of the high order harmonic component producing can reduce machine operation time on motor rotation, the power output of raising motor.Magnetic conduction sheet is fixed at winding slot opening part, block the opening of winding slot completely, made stator structure form slotless configuration, the air-gap field between rotor is evenly distributed, significantly reduce the cogging torque of brushless electric machine, thereby reduced the noise of brushless electric machine.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is A portion enlarged diagram in Fig. 1.
Embodiment
As depicted in figs. 1 and 2, brushless motor stator of the present utility model, comprises stator core 1, and the excircle of described stator core 1 is provided with the covered plastics layer 7 of insulation use.Stator core 1 is hollow structure, the inner edge of described stator core 1 is provided with the wire winding pole 2 extending internally, between wire winding pole 2, form winding slot 3, the end of wire winding pole 2 is provided with extension 4, the angle of the side of extension 4 and wire winding pole 3 is obtuse angle, the end of extension 4 is provided with the groove 5 with wire winding pole 2 center line symmetries, also comprise the magnetic conduction sheet 6 that is fixed at winding slot 3 opening parts, described magnetic conduction sheet 6 comprises magnetic conduction sheet insertion end 61 and magnetic conduction sheet stop part 62, the size of magnetic conduction sheet stop part 62 and winding slot 3 openings matches, block the opening of winding slot 3 completely, make stator structure form slotless configuration, air-gap field between rotor is evenly distributed, significantly reduce the cogging torque of brushless electric machine, thereby reduce the noise of brushless electric machine.On the extension 4 of winding slot 3 opening part both sides, be respectively equipped with magnetic conduction sheet holddown groove 8, described magnetic conduction sheet insertion end 61 is inserted in magnetic conduction sheet holddown groove 8, and both are interference fit.Described magnetic conduction sheet stop part 62 is plane.Magnetic conduction sheet stop part 62 can also be arc, and described arc is consistent with the shape of stator core 1 internal face, makes the more even of air-gap field distribution, is better eliminated cogging torque.
Claims (5)
1. brushless motor stator, comprise stator core, stator core is hollow structure, the inner edge of described stator core is provided with the wire winding pole extending internally, between wire winding pole, form winding slot, it is characterized in that: the end of wire winding pole is provided with extension, the angle of the side of extension and wire winding pole is obtuse angle, the end of extension is provided with the groove with wire winding pole center line symmetry, also comprise the magnetic conduction sheet that is fixed at winding slot opening part, described magnetic conduction sheet comprises magnetic conduction sheet insertion end and magnetic conduction sheet stop part, and the size of magnetic conduction sheet stop part and winding slot opening matches.
2. brushless motor stator according to claim 1, is characterized in that: on the extension of winding slot opening part both sides, be respectively equipped with magnetic conduction sheet holddown groove, described magnetic conduction sheet insertion end is inserted in magnetic conduction sheet holddown groove, and both are interference fit.
3. brushless motor stator according to claim 1, is characterized in that: described magnetic conduction sheet stop part is plane.
4. brushless motor stator according to claim 1, is characterized in that: described magnetic conduction sheet stop part be shaped as arc, described arc is consistent with the shape of stator core internal face.
5. brushless motor stator according to claim 1, is characterized in that: the excircle of described stator core is provided with covered plastics layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320773780.4U CN203707896U (en) | 2013-11-29 | 2013-11-29 | Brushless motor stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320773780.4U CN203707896U (en) | 2013-11-29 | 2013-11-29 | Brushless motor stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203707896U true CN203707896U (en) | 2014-07-09 |
Family
ID=51058277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320773780.4U Expired - Fee Related CN203707896U (en) | 2013-11-29 | 2013-11-29 | Brushless motor stator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203707896U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953487A (en) * | 2017-04-27 | 2017-07-14 | 哈尔滨工业大学 | A kind of high torque density, efficient magneto |
| CN107896046A (en) * | 2016-10-03 | 2018-04-10 | 操纵技术Ip控股公司 | Brushless motor component |
-
2013
- 2013-11-29 CN CN201320773780.4U patent/CN203707896U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107896046A (en) * | 2016-10-03 | 2018-04-10 | 操纵技术Ip控股公司 | Brushless motor component |
| US10411544B2 (en) | 2016-10-03 | 2019-09-10 | Steering Solutions Ip Holding Corporation | Brushless motor assembly |
| CN107896046B (en) * | 2016-10-03 | 2020-03-10 | 操纵技术Ip控股公司 | Brushless motor assembly |
| CN106953487A (en) * | 2017-04-27 | 2017-07-14 | 哈尔滨工业大学 | A kind of high torque density, efficient magneto |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20181129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |