CN104682589A - Low-noise brushless motor stator - Google Patents
Low-noise brushless motor stator Download PDFInfo
- Publication number
- CN104682589A CN104682589A CN201310628165.9A CN201310628165A CN104682589A CN 104682589 A CN104682589 A CN 104682589A CN 201310628165 A CN201310628165 A CN 201310628165A CN 104682589 A CN104682589 A CN 104682589A
- Authority
- CN
- China
- Prior art keywords
- magnetic conduction
- conduction sheet
- low
- wire wrapping
- brushless motor
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Brushless Motors (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to the field of motors and particularly relates to a low-noise brushless motor stator. The low-noise brushless motor stator comprises a stator iron core, wherein the stator iron core is in a hollow structure; wire wrapping rods which extend inwards are arranged at the inner edge of the stator iron core; wire wrapping grooves are formed between the wire wrapping rods; extending parts are arranged at the end parts of the wire wrapping rods and included angles between the extending parts and the side edge of the wire wrapping rods are obtuse angles; grooves which are symmetrical about the central lines of the wire wrapping rods are formed in the end parts of the extending parts; the low-noise brushless motor stator further comprises magnetism-conducting sheets which are fixedly arranged at openings of the wire wrapping grooves; each magnetism-conducting sheet comprises a magnetism-conducting sheet inserting end and a magnetism-conducting sheet stopping part; the size of each magnetism-conducting sheet stopping part is matched with the size of the opening of each wire wrapping groove. With the adoption of the structure, the influences on the operation of the motor by higher harmonics when the motor works can be reduced, and the output power of the motor is improved. A groove-free structure is formed on a stator structure so that an air gap magnetic field between the stators is uniformly distributed; a cogging torque of a brushless motor is greatly reduced so that the noises of the brushless motor are reduced.
Description
Technical field
The present invention relates to machine field, particularly a kind of low-noise brush-less motor stator.
Background technology
Brushless electric machine because of its there is brushless, low interference, smooth movements, low noise, the life-span is long, maintenance cost is low etc., and advantage is widely used.Existing brushless motor stator is generally the structure of similar hollow cylinder, within it sidewall is provided with the wire winding pole extended internally, and the space between wire winding pole is winding slot, produces high order harmonic component during machine operation, electric machine rotation is had an impact, causes the power output affecting motor.Brushless electric machine is due to mechanical commutating structure, and brshless DC motor is, by automatically controlled PWM pulse-width modulation, direct current modulation is obtained alternating current approx, realizes motor commutation.Modulate in the alternating current obtained containing a large amount of harmonic wave, can by improving PWM chopping frequency in low-power machine, chopping frequency is adjusted to 20KHz, high frequency noise is made to be in ultrasonic wave district, people's ear cannot be distinguished, thus reach the object reducing noise, but heightening chopping frequency in heavy-duty motor can cause motor torque unstable, there is step-out risk, therefore can only while optimization driver in heavy-duty motor, revise electric machine structure as much as possible, reduce the harmonic wave in the cogging torque of motor and back electromotive force.
Summary of the invention
The object of this invention is to provide the brushless motor stator that a kind of power output is high, noise is little.
Technical scheme of the present invention is as follows: low-noise brush-less motor stator, comprise stator core, stator core is hollow structure, the inner edge of described stator core is provided with the wire winding pole extended internally, winding slot is formed between wire winding pole, 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 of wire winding pole center line symmetry, also comprise the magnetic conduction sheet being fixed at winding slot opening part, described magnetic conduction sheet comprises magnetic conduction sheet insertion end and magnetic conduction sheet stop part, the matching size of magnetic conduction sheet stop part and winding slot opening closes.The extension of winding slot opening part both sides is respectively equipped with magnetic conduction sheet holddown groove, and 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.
The shape of described magnetic conduction sheet stop part is arc, and 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 of wire winding pole center line symmetry, and the high order harmonic component produced when can reduce machine operation, on the impact of motor rotation, improves the power output of 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, considerably reduce the cogging torque of brushless electric machine, thus reduce the noise of brushless electric machine.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is structural representation of the present invention;
Fig. 2 is A portion enlarged diagram in Fig. 1.
Embodiment
As depicted in figs. 1 and 2, low-noise brush-less motor stator of the present invention, comprises stator core 1, and the excircle of described stator core 1 is provided with the covered plastics layer 7 of insulation.Stator core 1 is hollow structure, the inner edge of described stator core 1 is provided with the wire winding pole 2 extended internally, winding slot 3 is formed between wire winding pole 2, 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 of wire winding pole 2 center line symmetry, also comprise the magnetic conduction sheet 6 being fixed at winding slot 3 opening part, described magnetic conduction sheet 6 comprises magnetic conduction sheet insertion end 61 and magnetic conduction sheet stop part 62, the matching size of magnetic conduction sheet stop part 62 and winding slot 3 opening closes, block the opening of winding slot 3 completely, stator structure is made to form slotless configuration, air-gap field between rotor is evenly distributed, considerably reduce the cogging torque of brushless electric machine, thus reduce the noise of brushless electric machine.The extension 4 of winding slot 3 opening part both sides is respectively equipped with magnetic conduction sheet holddown groove 8, and 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, and what air-gap field was distributed is more even, is better eliminated cogging torque.
Claims (5)
1. low-noise brush-less motor stator, comprise stator core, stator core is hollow structure, the inner edge of described stator core is provided with the wire winding pole extended internally, winding slot is formed between wire winding pole, 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 of wire winding pole center line symmetry, also comprise the magnetic conduction sheet being fixed at winding slot opening part, described magnetic conduction sheet comprises magnetic conduction sheet insertion end and magnetic conduction sheet stop part, and the matching size of magnetic conduction sheet stop part and winding slot opening closes.
2. low-noise brush-less motor stator according to claim 1, is characterized in that: the extension of winding slot opening part both sides is respectively equipped with magnetic conduction sheet holddown groove, and described magnetic conduction sheet insertion end is inserted in magnetic conduction sheet holddown groove, and both are interference fit.
3. low-noise brush-less motor stator according to claim 1, is characterized in that: described magnetic conduction sheet stop part is plane.
4. low-noise brush-less motor stator according to claim 1, is characterized in that: the shape of described magnetic conduction sheet stop part is arc, and described arc is consistent with the shape of stator core internal face.
5. low-noise brush-less 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 |
|---|---|---|---|
| CN201310628165.9A CN104682589A (en) | 2013-11-29 | 2013-11-29 | Low-noise brushless motor stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628165.9A CN104682589A (en) | 2013-11-29 | 2013-11-29 | Low-noise brushless motor stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104682589A true CN104682589A (en) | 2015-06-03 |
Family
ID=53317311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310628165.9A Pending CN104682589A (en) | 2013-11-29 | 2013-11-29 | Low-noise brushless motor stator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104682589A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262304A (en) * | 2015-11-10 | 2016-01-20 | 浙江众邦机电科技有限公司 | A servo motor used for a sewing machine and the sewing machine |
| CN106374646A (en) * | 2016-10-08 | 2017-02-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator iron core, stator, motor and preparation method for stator iron core |
| US11022725B2 (en) | 2012-06-30 | 2021-06-01 | Fotonation Limited | Systems and methods for manufacturing camera modules using active alignment of lens stack arrays and sensors |
-
2013
- 2013-11-29 CN CN201310628165.9A patent/CN104682589A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11022725B2 (en) | 2012-06-30 | 2021-06-01 | Fotonation Limited | Systems and methods for manufacturing camera modules using active alignment of lens stack arrays and sensors |
| CN105262304A (en) * | 2015-11-10 | 2016-01-20 | 浙江众邦机电科技有限公司 | A servo motor used for a sewing machine and the sewing machine |
| CN106374646A (en) * | 2016-10-08 | 2017-02-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator iron core, stator, motor and preparation method for stator iron core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |