CN208539768U - Brshless DC motor - Google Patents
Brshless DC motor Download PDFInfo
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- CN208539768U CN208539768U CN201820958766.4U CN201820958766U CN208539768U CN 208539768 U CN208539768 U CN 208539768U CN 201820958766 U CN201820958766 U CN 201820958766U CN 208539768 U CN208539768 U CN 208539768U
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- motor
- permanent magnet
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Abstract
The utility model discloses a kind of brshless DC motors, the brshless DC motor (1) includes Hall element (4) and the axial rotor core (3) for being fitted with permanent magnet, the axial end face of the permanent magnet flushes the axial end face of the rotor core (3), and the Hall element (4) is arranged with the axial end face axially spaced-apart of the permanent magnet flushed.The brshless DC motor of the utility model is by making the axial end face of permanent magnet flush the axial end face of rotor core; it can ensure Hall element in the case where saving magnet ring to the detection accuracy in the magnetic field of permanent magnet, be conducive to the inner space for saving motor and reduce its production cost.
Description
Technical field
The utility model relates to technical field of motors, and in particular, to a kind of brshless DC motor.
Background technique
In the case where loading biggish situation, brshless DC motor is difficult to the position to rotor during starting or slowly running
The accurate control of work is set, is reduced so as to cause the stability that can not normally start or when slowly running.For this purpose, existing brushless straight
It is typically provided with magnet ring and Hall sensor in galvanic electricity machine, i.e., is turned by magnetic field caused by Hall sensor reaction magnetic ring with detecting
The real time position of son, to realize the accurate control to motor.
However, the setting of magnet ring can additionally occupy the inner space of motor, make becoming large-sized for motor, to increase motor
Production cost.In addition, when the biggish motor application of axial dimension is when the food cooking machines such as blender, since center of gravity is higher,
It will lead to operational vibration and noise be excessive, to substantially reduce the usage experience of user.
Utility model content
In view of the above drawbacks of the prior art or insufficient, the utility model provides a kind of brshless DC motor, Neng Gou
Magnet ring is saved under the premise of accurate detection rotor-position, to keep the structure of motor simpler, compact, advantageously reduces production
Cost and raising production efficiency.
To achieve the above object, the utility model provides a kind of brshless DC motor, and the brshless DC motor includes
Hall element and the axial rotor core for being fitted with permanent magnet, the axial end face of the permanent magnet flush the axis of the rotor core
To end face, the Hall element is arranged with the axial end face axially spaced-apart of the permanent magnet flushed.
Preferably, the front end face of the permanent magnet flushes the front end face of the rotor core, and the Hall element interval is set
It is placed in the axial forward end of the front end face of the rotor core, alternatively, the rear end face of the permanent magnet flushes the rotor core
Rear end face, the Hall element are arranged at intervals at the axial rearward end of the rear end face of the rotor core.
Preferably, the brshless DC motor further include the front pressuring plate that is socketed on the armature spindle of the rotor core and after
Pressing plate, the rear end face of the front pressuring plate press on the front end face of the rotor core, and the front end face of the rear fender presses on institute
State the rear end face of rotor core.
Preferably, the front end face of the rear fender is equipped with multiple elastic pressuring plates to front projection, circumferentially spaced arrangement
Multiple elastic pressuring plates can be respectively protruding into the corresponding permanent magnet inserting groove of the rotor core with press on it is described forever
The rear end face of magnet.
Preferably, the axial length of the permanent magnet is less than the axial length of the rotor core.
Preferably, the brshless DC motor further includes the electricity for being socketed on the armature spindle and being located at the rear fender rear end
Machine blade, the motor blower fan are equipped with rear fender holding tank, and the rear fender is installed in the rear fender holding tank.
Preferably, the Hall element is the plane for being integrated with circumferentially spaced multiple patch type Hall sensors
Circuit board.
Preferably, the axial spacing between the axial end face that the Hall element is flushed with the permanent magnet is
0.5mm~4mm.
Preferably, the number of the Hall sensor is 3 and is circumferentially spacedly distributed.
Preferably, the brshless DC motor further includes electric motor end cap, and the planar circuit board is fixedly installed in the electricity
Generator terminal covers.
Through the above technical solutions, the Hall element in the brshless DC motor of the utility model need not cooperation magnet ring work
Make, by making the axial end face of permanent magnet flush the axial end face of rotor core, it is ensured that Hall element is to the magnetic field of permanent magnet
Detection accuracy, the production cost for being conducive to the inner space for saving motor and reducing motor, keeps the structure of motor more compact.
Other features and advantages of the utility model will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to be used to provide a further understanding of the present invention, and constitute part of specification, and following
Specific embodiment be used to explain the utility model together, but do not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the brshless DC motor in specific embodiment of the present utility model；
Fig. 2 is the cross-sectional view of the brshless DC motor in Fig. 1；
Fig. 3 is the partial enlargement diagram of the brshless DC motor in Fig. 2；
Fig. 4 is the structural schematic diagram of the rotor assembly of the brshless DC motor in Fig. 2；
Fig. 5 is the structural schematic diagram of the Hall element of the brshless DC motor in Fig. 2；
Fig. 6 is the structural schematic diagram of the rear fender of the brshless DC motor in Fig. 2；
Fig. 7 is the structural schematic diagram of the front pressuring plate of the brshless DC motor in Fig. 2；
Fig. 8 is the structural schematic diagram of the electric motor end cap of the brshless DC motor in Fig. 1.
Description of symbols:
1 brshless DC motor, 2 armature spindle
3 rotor core, 4 Hall element
5 front pressuring plate, 6 rear fender
7 motor blower fan, 8 electric motor end cap
41 planar circuit board, 42 Hall sensor
43 positioning holes on circuit board, 61 elastic pressuring plate
81 end cap positioning columns
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.It should be understood that herein
Described specific embodiment is only used for describing and explaining the present invention, and is not intended to limit the utility model.
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, top, bottom " is usually
Be for direction shown in the drawings either for it is vertical, vertically or on gravity direction for each component mutual alignment
Relationship description word.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
The utility model provides a kind of brshless DC motor 1, and as shown in Figures 1 to 8, brshless DC motor 1 includes turning
Sub-component, the rotor assembly include armature spindle 2, rotor core 3, front pressuring plate 5 and rear fender 6.Wherein, axial on rotor core 3
It is fitted with permanent magnet, front pressuring plate 5 is socketed on the front end on armature spindle 2 and being located at rotor core 3, and rear fender 6 is socketed on armature spindle 2
Rear end that is upper and being located at rotor core 3.Brshless DC motor 1 further includes Hall element 4, and 4 compartment of terrain of Hall element fixation is set
The axial forward end of front pressuring plate 5 or the axial rearward end of rear fender 6 are placed in detect the magnetic field of permanent magnet.
As it can be seen that the Hall element 4 in the brshless DC motor 1 of the utility model need not cooperate magnet ring work can be real-time
The position for detecting rotor, due to saving magnet ring, brshless DC motor 1 has smaller volume and lower production cost.This
Outside, the brshless DC motor 1 of the utility model is provided with front pressuring plate 5 and rear fender 6 on armature spindle 2, which being capable of axis
To fixed permanent magnet front end and rear fender 6 be capable of the rear end of axial restraint permanent magnet with ensure permanent magnet have stable installation
Structure is conducive to further increase Hall element 4 to the detection accuracy of rotor-position and rotor speed.Also, front pressuring plate 5 is with after
Pressing plate 6 is provided with the assembly for being conducive to simplify rotor assembly, and keeps the structure of rotor assembly more compact, to reduce brushless straight
The axial dimension of galvanic electricity machine 1.In other words, when the brshless DC motor for using the utility model in the food cooking machines such as blender
When 1, the operational vibration and noise of the food cooking machine can be substantially reduced, to be effectively improved the usage experience of user.
Preferably, the front end face of permanent magnet can be set to being flush to the front end face of rotor core 3, at this time Hall element 4
Positioned at the axial forward end of the front end face of rotor core 3.Alternatively, the rear end face of permanent magnet can be set to be flush to rotor core 3
Rear end face, Hall element 4 is located at the axial rearward end of the rear end face of rotor core 3 at this time.As it can be seen that Hall element 4 and it is each forever
The distance between front end face or rear end face of magnet are consistent, guarantee the uniform consistency of hall signal with this, to guarantee suddenly
The detection accuracy of your element 4.
Specifically, Hall element 4 may be configured as being integrated with circumferentially spaced multiple patch type Hall sensors 42
Planar circuit board 41.Wherein, when planar circuit board 41 is set to the axial forward end of front pressuring plate 5, planar circuit board 41 with forever
The front end face parallel interval of magnet is arranged.When planar circuit board 41 is set to the axial rearward end of rear fender 6, planar circuit board 41
It is arranged with the rear end face parallel interval of permanent magnet.In addition, the axial direction between Hall element 4 and the front end face or rear end face of permanent magnet
Spacing is preferably arranged to 0.5mm~4mm, to detect the magnetic field of permanent magnet more accurately.
Further, the number of Hall sensor 42 can be preferably arranged to 3 to form three-phase Hall sensor.Its
In, which is circumferentially spacedly distributed, angle between adjacent Hall sensor 42 and it is each suddenly
Your radial position of the sensor 42 on planar circuit board 41 is related to the number of stator slots of brshless DC motor 1.For example, working as nothing
When number of stator slots in brushless motor 1 is 12,30 ° are set by the angle between adjacent Hall sensor 42.
Specifically, planar circuit board 41 is equipped with multiple positioning holes on circuit board 43.Brshless DC motor 1 further includes that setting exists
The electric motor end cap 8 of the end of armature spindle 2, the electric motor end cap 8 are equipped with one-to-one multiple with multiple positioning holes on circuit board 43
End cap positioning column 81.At this point, Hall element 4 can be installed on to the end cap positioning column of electric motor end cap 8 by positioning holes on circuit board 43
On 81, then fastened by the modes such as rivet or be spirally connected.
Based on being set as the front end face of permanent magnet or rear end face to be flush to rotor respectively in above-mentioned brshless DC motor 1
The front end face of iron core 3 or the structure of rear end face can be in rear fenders 6 when Hall element 4 is set as above-mentioned planar circuit board 41
Front end face multiple elastic pressuring plates 61 to front projection are set, the circumferentially spaced arrangement of multiple elastic pressuring plates 61 and being respectively protruding into turns
In the corresponding permanent magnet inserting groove of sub- iron core 3, so that the rear end of corresponding permanent magnet is pressed on, to make the front end of permanent magnet
Face is flush to the front end face of rotor core 3.At this point, the axial length of permanent magnet is less than the axial length of rotor core 3.Alternatively,
Multiple elastic pressuring plates 61 to rear projection can also be set in the rear end face of front pressuring plate 5, multiple elastic pressuring plates 61 are circumferentially spaced
In the corresponding permanent magnet inserting groove for arranging and being respectively protruding into rotor core 3, so that the front end of corresponding permanent magnet is pressed on, from
And the rear end face of permanent magnet is made to be flush to the rear end face of rotor core 3.
Specifically, brshless DC motor 1 further includes the motor blower fan for the rear end for being socketed on armature spindle 2 and being located at rear fender 6
7.Wherein, multiple cartridge parts of circumferentially spaced arrangement can be set in the front end of motor blower fan 7, and in the rear end of rotor core 3
Face is formed with multiple inserting grooves, and multiple cartridge parts and multiple inserting grooves, which correspond, to be inserted, to make the brushless of the utility model
Motor blower fan 7 in direct current generator 1 is formed as built-in fan blade, further reduces the axis of the rotor assembly of brshless DC motor 1
To size.
Preferably, when motor blower fan 7 is formed as built-in fan blade, rear fender can be set in the front end of motor blower fan 7 and holds
Receive slot, which can accommodate above-mentioned rear fender 6, to keep the overall structure of rotor assembly more compact.
Preferred embodiments of the present invention, still, the utility model and unlimited are described in detail in conjunction with attached drawing above
Detail in above embodiment can be to the skill of the utility model in the range of the technology design of the utility model
Art scheme carries out a variety of simple variants, these simple variants belong to the protection scope of the utility model.
It is further to note that specific technical features described in the above specific embodiments, in not lance
It in the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the utility model is to each
No further explanation will be given for the possible combination of kind.
In addition, any combination can also be carried out between a variety of different embodiments of the utility model, as long as it is not disobeyed
The thought for carrying on the back the utility model, equally should be considered as content disclosed in the utility model.
Claims (10)
1. a kind of brshless DC motor, which is characterized in that the brshless DC motor (1) includes Hall element (4) and axially inserts
Rotor core (3) equipped with permanent magnet, the axial end face of the permanent magnet flush the axial end face of the rotor core (3), institute
State the axial end face axially spaced-apart setting that Hall element (4) is flushed with the permanent magnet.
2. brshless DC motor according to claim 1, which is characterized in that the front end face of the permanent magnet flushes described turn
The front end face of sub- iron core (3), the Hall element (4) are arranged at intervals at the axial forward end of the front end face of the rotor core (3),
Alternatively, the rear end face of the permanent magnet flushes the rear end face of the rotor core (3), the Hall element (4) is arranged at intervals at
The axial rearward end of the rear end face of the rotor core (3).
3. brshless DC motor according to claim 1, which is characterized in that the brshless DC motor (1) further includes set
The front pressuring plate (5) and rear fender (6) being connected on the armature spindle (2) of the rotor core (3), the rear end face of the front pressuring plate (5)
The front end face of the rotor core (3) is pressed on, after the front end face of the rear fender (6) presses on the rotor core (3)
End face.
4. brshless DC motor according to claim 3, which is characterized in that the front end face of the rear fender (6) be equipped with to
Multiple elastic pressuring plates (61) of front projection, multiple elastic pressuring plates (61) of circumferentially spaced arrangement can be respectively protruding into described
The rear end face of the permanent magnet is pressed in the corresponding permanent magnet inserting groove of rotor core (3).
5. brshless DC motor according to claim 4, which is characterized in that the axial length of the permanent magnet is less than described
The axial length of rotor core (3).
6. brshless DC motor according to claim 3, which is characterized in that the brshless DC motor further includes being socketed on
The motor blower fan (7) of the armature spindle (2) and the rear end positioned at the rear fender (6), the motor blower fan (7) are equipped with rear fender
Holding tank, the rear fender (6) are installed in the rear fender holding tank.
7. brshless DC motor described according to claim 1~any one of 6, which is characterized in that the Hall element (4)
For the planar circuit board (41) for being integrated with circumferentially spaced multiple patch type Hall sensors (42).
8. brshless DC motor according to claim 7, which is characterized in that the Hall element (4) and the permanent magnet
The axial spacing between the axial end face flushed is 0.5mm~4mm.
9. brshless DC motor according to claim 7, which is characterized in that the number of the Hall sensor (42) is 3
It is a and be circumferentially spacedly distributed.
10. brshless DC motor according to claim 7, which is characterized in that the brshless DC motor (1) further includes electricity
Generator terminal lid (8), the planar circuit board (41) are fixedly installed on the electric motor end cap (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820958766.4U CN208539768U (en) | 2018-06-21 | 2018-06-21 | Brshless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820958766.4U CN208539768U (en) | 2018-06-21 | 2018-06-21 | Brshless DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208539768U true CN208539768U (en) | 2019-02-22 |
Family
ID=65392198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820958766.4U Active CN208539768U (en) | 2018-06-21 | 2018-06-21 | Brshless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208539768U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599512A (en) * | 2018-06-21 | 2018-09-28 | 广东威灵电机制造有限公司 | Brshless DC motor |
| CN113659774A (en) * | 2021-08-06 | 2021-11-16 | 浙江乐歌智能驱动科技有限公司 | Mounting structure of brushless direct current motor hall sensor |
-
2018
- 2018-06-21 CN CN201820958766.4U patent/CN208539768U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599512A (en) * | 2018-06-21 | 2018-09-28 | 广东威灵电机制造有限公司 | Brshless DC motor |
| CN113659774A (en) * | 2021-08-06 | 2021-11-16 | 浙江乐歌智能驱动科技有限公司 | Mounting structure of brushless direct current motor hall sensor |
| CN113659774B (en) * | 2021-08-06 | 2022-09-02 | 浙江乐歌智能驱动科技有限公司 | Mounting structure of brushless direct current motor hall sensor |
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