CN2733729Y - Brushless DC motor with outlaid hall element - Google Patents
Brushless DC motor with outlaid hall element Download PDFInfo
- Publication number
- CN2733729Y CN2733729Y CNU2004200372627U CN200420037262U CN2733729Y CN 2733729 Y CN2733729 Y CN 2733729Y CN U2004200372627 U CNU2004200372627 U CN U2004200372627U CN 200420037262 U CN200420037262 U CN 200420037262U CN 2733729 Y CN2733729 Y CN 2733729Y
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- Prior art keywords
- motor
- circuit board
- brshless
- external
- magnet steel
- Prior art date
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Abstract
The utility model relates to the improvement of the Hall element, etc. of a brushless direct current motor, comprising a motor shell body, and a stator and a rotor which are provided inside the motor shell body. The utility model is characterized in that: a circuit board is provided on the rear end part of the motor shell body; the circuit board and a control chip are suited and connected on a rear end cover by suited connection elements; the control chip is abutted on the rear end cover; a Hall element is provided on the circuit board; a magnetic steel which is induced with the Hall element is provided on the end of the rotor shaft of the rotor. Therefore, the utility model has the advantages as follows: reasonable design, simple structure, and marked effect; the Hall element is originally and externally provided, which overcomes the defect of layout on the original scheme, efficiently simplifies the structure of the utility model, and is convenient to assemble the Hall element; the performance of heat dispersion is markedly enhanced, and the working stability of a system is enhanced; the process of debugging is convenient and prompt, and is easy to be operated.
Description
Technical field
The utility model relates to a kind of brshless DC motor, especially relates to the isostructural improvement of a kind of Hall unit to brshless DC motor.
Background technology
Brshless DC motor has superior speed adjusting performance, shows that mainly speed governing is convenient, speed-regulating range width, and low-speed performance is good, operates steadily, and noise is low, the power factor height, so it is very high not have rotor loss efficient again, the application scenario is extremely extensive to civilian occasion from industry.The application of particularly miniature brshless DC motor is more extensive.In order to improve motor properties, people have carried out long-term exploration, have proposed multiple design.But electrical micro-machine is because inner space restriction, and its structure is compact, to the layout designs of the motor particularly difficulty that seems.The controller of conventional motors generally all is external, and whole system just is divided into two parts like this, motor part and control section, and its integrated degree is relatively poor.And traditional Hall unit generally all is to be contained on the stator of motor, and the lead-out wire of Hall unit is connected on the circuit board, and so no matter electric machine is positioned at motor still motor internal outward, all will draw many lines.Under the less situation of the volume of motor, the operation easier when having increased assembling makes production efficiency lower.For this reason, the someone has designed the structure that a kind of motor and controller are connected as a single entity, to improve the integrated degree of motor.But the Hall unit of this structure is still and is contained on the stator, fundamentally do not solve technological problems, and heat dispersion is relatively poor.Motor body is more in the circuit of the connection of controller, and operation is also relatively more difficult, and not only inefficiency, and performance is very unstable yet.The somebody has designed a kind of generation (application number: 95193156.3) of virtual Hall effect signal of the sensorless electric rotating machine that is used for brushless electric machine, the Hall effect transducer that it has adopted in the electronics solid-state circuit replacement brshless DC motor provides identical with Hall effect transducer basically output signal.This scenario-frame is comparatively complicated, and the stability of circuit is not high, is difficult to carry out in actual production process.
The utility model content
The utility model mainly is to solve the existing in prior technology complex structure, and circuit is mixed and disorderly, and assembly difficulty is big, and production efficiency is low, and debugging difficulty is big, and integrated degree is not high, the technical problem that layout does not very rationally wait.
The utility model has solved also simultaneously that the existing in prior technology heat dispersion is not high, and circuit board is easy to burn out, the technical problem that the stability of a system is not high.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: the brshless DC motor that Hall unit is external, comprise electric machine casing, be located at stator and rotor in the housing, it is characterized in that being provided with circuit board in described housing rearward end, described circuit board and control chip are coupled on the rear end cap by counterpart, described control chip is close proximity on the rear end cap, is provided with Hall unit on circuit board; Armature spindle end at described rotor is provided with the magnet steel of responding to Hall unit.The utility model has changed the defective of prior art, creatively Hall element is moved out from bore of stator is indoor, places circuit board cavity indoor.Like this, Hall element directly places on the circuit board, has not had complicated lead-in wire, and the lead-in wire between circuit board and the stator has only three winding wire assemblings to be easy to.But, Hall element shifts out after the stator chamber, rotor magnetic steel in stator is far away, rotation that can not inductiopn rotor, for this reason, it is indoor that armature spindle is extended to the circuit board cavity of facing mutually with the stator chamber, adorn a miniature circular magnet steel again on the axle that this root prolongs, this magnet steel and rotor rotate synchronously, and this small-sized magnet steel can induce the position signalling of rotor on Hall element, thereby the commutation of the stator current of control circuit board, the drive motors rotation.Here control chip is contacted the heat radiation that helps chip with rear end cap, avoided burning out, thereby cause the phenomenon of whole system paralysis, improved the stability of system effectively owing to circuit board is overheated.
As preferably, described housing is separated into stator chamber and circuit board chamber by dividing plate, and described armature spindle passes dividing plate and enters the circuit board chamber.
As preferably, described armature spindle is matched with the matching hole of being located on the dividing plate by bearing, and described bearing is an oiliness bearing.Oiliness bearing can reduce the energy loss in the transmission course effectively, improves transmission efficiency.
For the ease of lead-in wire, as preferably, described dividing plate is provided with threading hole, and the lead-in wire of described circuit board passes the threading hole stator winding indoor with being located at bore of stator and links to each other.
For the ease of the location of rear end cap, as preferably, the chamber wall of described circuit board chamber is provided with packing ring, and described rear end cap is abutted against on packing ring.
As preferably, described magnet steel is cylindric magnet steel, and the axial line of described armature spindle and the axial line of magnet steel are located along the same line.Because general cylindric magnetic strength is not with the naked eye seen the line of demarcation that the N utmost point and S reach, so when installing, place the installation of the small-sized magnetic strength of circuit board chamber can not consider that the polar form of the magnetic steel of stator that this magnet steel and bore of stator are indoor is corresponding one by one, as long as be fixed in circuit board on the rear end cap by adjusting, the rear end cap that connects circuit board can be rotated along the shell of motor, by observing ammeter,, be adjusted to the position that needs when motor is the highest just when ammeter electric current minimum.
In addition, for the ease of the location of oiliness bearing, as preferably, described dividing plate matching hole is provided with back-up ring.
Therefore, the utlity model has following advantage: 1, reasonable in design, simple in structure, effect is remarkable; 2, originally that Hall unit is external, overcome the defective of layout on original scheme, simplify the structure effectively, be convenient to assembling; 3, heat dispersion significantly improves, and has improved the stability of system works; 4, debug process is convenient, easy operating.
Description of drawings
Accompanying drawing 1 is a kind of broken section structural representation of the present utility model.
Embodiment
Pass through embodiment down, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the brshless DC motor that Hall unit is external, comprise electric machine casing 1, be located at stator and rotor in the housing 1.Described housing 1 is separated into stator chamber 8 and circuit board chamber 9 by dividing plate 7, and described armature spindle 5 passes dividing plate 7 and enters circuit board chamber 9.Housing 1 rearward end is provided with circuit board 2, and described circuit board 2 is coupled on the rear end cap 15 by counterpart 14 with control chip 3, and control chip 3 is close proximity to rear end cap 15; On circuit board 2, be provided with Hall unit 4.Armature spindle 5 ends of described rotor are provided with the magnet steel 6 with Hall unit 4 inductions.Described armature spindle 5 is matched with the matching hole of being located on the dividing plate 7 11 by bearing 10, and described bearing 10 is an oiliness bearing.Be provided with threading hole 12 on dividing plate 7, the stator winding in three lead-in wires 13 of described circuit board 2 pass threading hole 12 and are located at stator chamber 8 links to each other.The chamber wall of described circuit board chamber 9 is provided with packing ring 16, and described rear end cap 15 is abutted against on packing ring 16.The magnet steel 6 here is cylindric magnet steel, and the axial line of the axial line of described armature spindle 5 and magnet steel 6 is located along the same line; On the matching hole 11 of dividing plate, be provided with back-up ring 17.
During the motor operation, the magnet steel 6 of being located at armature spindle 5 ends rotates, thereby the Hall unit on the circuit board is located in induction, thereby drive motors rotates.During debugging, be fixed in circuit board on the rear end cap, make the rear end cap that connects circuit board by observing ammeter,, be adjusted to the position that needs when motor is the highest just along the shell rotation of motor when ammeter electric current minimum by adjusting.
Claims (10)
1. brshless DC motor that Hall unit is external, comprise electric machine casing, be located at stator and rotor in the housing, it is characterized in that being provided with circuit board (2) in described housing (1) rearward end, described circuit board (2) is coupled on the rear end cap (15) by counterpart (14) with control chip (3), described control chip (3) is close proximity on the rear end cap (15), is provided with Hall unit (4) on circuit board (2); Armature spindle (5) end at described rotor is provided with the magnet steel of responding to Hall unit (4) (6).
2. the external brshless DC motor of Hall unit according to claim 1, it is characterized in that being separated into stator chamber (8) and circuit board chamber (9) at described housing (1) by dividing plate (7), described armature spindle (5) passes dividing plate (7) and enters circuit board chamber (9).
3. the external brshless DC motor of Hall unit according to claim 1 and 2 is characterized in that at described armature spindle (5) matchedly by bearing (10) and the matching hole (11) be located on the dividing plate (7), and described bearing (10) is an oiliness bearing.
4. the external brshless DC motor of Hall unit according to claim 1 and 2, it is characterized in that being provided with on described dividing plate (7) threading hole (12), the stator winding in the lead-in wire (13) of described circuit board (2) passes threading hole (12) and is located at stator chamber (8) links to each other.
5. the external brshless DC motor of Hall unit according to claim 3, it is characterized in that being provided with on described dividing plate (7) threading hole (12), the stator winding in the lead-in wire (13) of described circuit board (2) passes threading hole (12) and is located at stator chamber (8) links to each other.
6. according to claim 1 or the external brshless DC motor of 2 or 5 described Hall units, it is characterized in that being provided with packing ring (16) on the chamber wall of described circuit board chamber (9), described rear end cap (15) is abutted against on packing ring (16).
7. according to claim 1 or the external brshless DC motor of 2 or 5 described Hall units, it is characterized in that at described magnet steel (6) be cylindric magnet steel, the axial line of the axial line of described armature spindle (5) and magnet steel (6) is located along the same line.
8. the external brshless DC motor of Hall unit according to claim 6 is characterized in that at described magnet steel (6) be cylindric magnet steel, and the axial line of the axial line of described armature spindle (5) and magnet steel (6) is located along the same line.
9. according to claim 1 or the external brshless DC motor of 2 or 5 described Hall units, it is characterized in that being provided with back-up ring (17) on the matching hole (11) at described dividing plate.
10. the external brshless DC motor of Hall unit according to claim 8 is characterized in that being provided with back-up ring (17) on the matching hole (11) at described dividing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200372627U CN2733729Y (en) | 2004-06-29 | 2004-06-29 | Brushless DC motor with outlaid hall element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200372627U CN2733729Y (en) | 2004-06-29 | 2004-06-29 | Brushless DC motor with outlaid hall element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2733729Y true CN2733729Y (en) | 2005-10-12 |
Family
ID=35069565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200372627U Expired - Fee Related CN2733729Y (en) | 2004-06-29 | 2004-06-29 | Brushless DC motor with outlaid hall element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2733729Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163903A (en) * | 2011-05-03 | 2011-08-24 | 东南大学 | Permanent magnetic brushless direct-current motor with integrated Hall position sensor and controller |
| CN102983702A (en) * | 2012-11-09 | 2013-03-20 | 孙亚男 | Brushless Hall externally built direct current motor |
| CN103036385A (en) * | 2012-12-05 | 2013-04-10 | 河北首力防爆电机有限公司 | Brushless direct-current (DC) motor |
| US10848042B2 (en) | 2017-02-13 | 2020-11-24 | Milwaukee Electric Tool Corporation | Brushless direct current motor for power tools |
-
2004
- 2004-06-29 CN CNU2004200372627U patent/CN2733729Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163903A (en) * | 2011-05-03 | 2011-08-24 | 东南大学 | Permanent magnetic brushless direct-current motor with integrated Hall position sensor and controller |
| CN102163903B (en) * | 2011-05-03 | 2012-10-24 | 东南大学 | Permanent magnetic brushless direct-current motor with integrated Hall position sensor and controller |
| CN102983702A (en) * | 2012-11-09 | 2013-03-20 | 孙亚男 | Brushless Hall externally built direct current motor |
| CN103036385A (en) * | 2012-12-05 | 2013-04-10 | 河北首力防爆电机有限公司 | Brushless direct-current (DC) motor |
| US10848042B2 (en) | 2017-02-13 | 2020-11-24 | Milwaukee Electric Tool Corporation | Brushless direct current motor for power tools |
| US11114927B2 (en) | 2017-02-13 | 2021-09-07 | Milwaukee Electric Tool Corporation | Brushless direct current motor for power tools |
| US11881750B2 (en) | 2017-02-13 | 2024-01-23 | Milwaukee Electric Tool Corporation | Brushless direct current motor for power tools |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051012 |