CN110311514B - External rotor brushless motor with absolute origin signal - Google Patents
External rotor brushless motor with absolute origin signal Download PDFInfo
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- CN110311514B CN110311514B CN201910705402.4A CN201910705402A CN110311514B CN 110311514 B CN110311514 B CN 110311514B CN 201910705402 A CN201910705402 A CN 201910705402A CN 110311514 B CN110311514 B CN 110311514B
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- 238000002955 isolation Methods 0.000 claims abstract description 20
- 230000006698 induction Effects 0.000 claims abstract description 15
- 230000003068 static effect Effects 0.000 claims abstract description 13
- 230000005389 magnetism Effects 0.000 claims abstract description 10
- 230000004323 axial length Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims 2
- 230000011218 segmentation Effects 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 abstract description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 16
- 238000010586 diagram Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Brushless Motors (AREA)
Abstract
The invention discloses an outer rotor brushless motor with an absolute origin signal, which comprises a stator connecting shaft and a rotor shell; the outer wall of the stator connecting shaft is connected with a dynamic magnetic field group and a circuit board; a rotor isolation tube is arranged on the inner wall of the rotor shell, and a static magnetic field group and a Hall sensing assembly are arranged on the inner wall of the rotor isolation tube; the Hall sensing assembly comprises a first rotor magnetism isolating ring, a Hall reversing sensing magnetic ring, a second rotor magnetism isolating ring and a Hall absolute origin sensing magnetic ring which are sequentially arranged from top to bottom, and also comprises a Hall reversing sensor and a Hall absolute origin sensor. The Hall absolute origin induction magnetic ring is additionally arranged, the Hall absolute origin sensor can output a standard voltage square wave periodic signal with a mechanical angle of 360 degrees through the Hall absolute origin induction magnetic ring, and the circumferential position of the outer rotor relative to the inner stator can be obtained after the circuit board receives the signal, so that the control accuracy can be effectively improved.
Description
Technical Field
The invention relates to the technical field of brushless motors, in particular to an external rotor brushless motor with an absolute origin signal.
Background
The existing external rotor brushless motor is generally provided with an external rotor and an internal stator, wherein the external rotor comprises a rotor shell, a static magnetic field group, a Hall reversing induction magnetic ring and a Hall reversing sensor, the internal stator comprises a connecting shaft and a dynamic magnetic field group, and the external rotor can rotate relative to the internal stator through mutual coupling between the static magnetic field group and the dynamic magnetic field group, but the following structure has the following problems: 1. the Hall reversing sensor cannot acquire the relative position between the outer rotor and the inner stator, and then the Hall reversing sensor provides accurate control of the relative position between the outer rotor and the inner stator. 2. Because the positioning can not be directly realized through the connecting shaft, a sleeve flange structure is designed on the outer surface of the bearing connected with the connecting shaft, which can certainly increase the structural complexity and the production cost of the motor. 3. Because of the existence of the sleeve flange structure, the Hall wires and the three-phase wires of the motor can only be led out from the safety space of the sleeve flange structure, so that the moment generated by unit volume is reduced, and the high power density of the motor is further reduced. 4. Because of the existence of the connecting shaft and the sleeve flange structure, the outer rotor has certain directivity when being provided with load, and thus the universality of the application of the product can be affected. 5. The connecting shaft is generally protruded outside the outer rotor, and the sleeve flange structure is also protruded outside the outer rotor in the circumferential direction, so that larger axial and radial space is occupied, and the miniaturization design of the motor is affected.
Disclosure of Invention
It is an object of the present invention to overcome the above-mentioned problems of the prior art and to provide an external rotor brushless motor with an absolute origin signal.
The aim of the invention is mainly realized by the following technical scheme:
the outer rotor brushless motor with the absolute origin signal comprises a stator connecting shaft and a rotor shell, wherein the rotor shell is connected to the periphery of the stator connecting shaft through a bearing, and the stator connecting shaft and the rotor shell are coaxially arranged;
the outer wall of the stator connecting shaft is connected with a dynamic magnetic field group and a circuit board;
a rotor isolation tube is arranged on the inner wall of the rotor shell, and a static magnetic field group coupled with the dynamic magnetic field group and a Hall sensing assembly positioned below the static magnetic field group are arranged on the inner wall of the rotor isolation tube;
the Hall sensing assembly comprises a first rotor magnetism isolating ring, a Hall reversing sensing magnetic ring, a second rotor magnetism isolating ring and a Hall absolute origin sensing magnetic ring which are sequentially arranged from top to bottom, and also comprises a Hall reversing sensor for sensing the Hall reversing sensing magnetic ring and a Hall absolute origin sensor for sensing the Hall absolute origin sensing magnetic ring.
According to the invention, the dynamic magnetic field group comprises a silicon steel sheet sleeved on a stator connecting shaft, a plurality of stator grooves are formed in the silicon steel sheet, the silicon steel sheet is formed by the plurality of stator grooves, a plurality of silicon steel sheet support sections uniformly distributed along the circumferential direction of the silicon steel sheet are formed in the silicon steel sheet, electromagnetic wires are wound on the silicon steel sheet support sections, and the static magnetic field group comprises a plurality of magnets connected to the inner wall surface of a rotor shell. The rotor shell can rotate relative to the stator connecting shaft through the mutual coupling between the magnetic field generated by the dynamic magnetic field group and the magnetic field generated by the static magnetic field group. The rotor isolation tube can prevent magnetic field leakage and improve the effect of the magnetic field generating assembly. The dynamic magnetic field set and the static magnetic field set may be collectively considered as a magnetic field generating component. Since the magnetic field generating assembly may be of the prior art, it is not described in detail herein. The circuit board is electrically connected with an external controller through a Hall lead.
In the Hall sensing assembly, the first rotor magnet isolation ring and the second rotor magnet isolation ring can isolate the magnet, the Hall reversing sensing magnet ring and the Hall absolute origin sensing magnet ring, so that mutual influence between the magnet and the Hall reversing sensing magnet ring is avoided, and the Hall reversing sensor can output corresponding signals to an external controller through the sensing reversing sensing magnet ring so as to control reversing and rotating speed of the motor. The Hall absolute origin induction magnetic ring can form a pair of radial north-south magnetic fields by adopting a radiation magnetizing mode, the Hall absolute origin sensor can output a standard voltage square wave periodic signal with a mechanical angle of 360 degrees by sensing the Hall absolute origin induction magnetic ring, and the circumferential position of the outer rotor relative to the inner stator can be obtained after an external controller receives the signal, so that the control accuracy can be effectively improved.
Further, the stator connecting shaft is hollow, a wire passing hole penetrating through the inner wall and the outer wall of the stator connecting shaft is formed in the stator connecting shaft, and a connecting boss is further arranged on the outer wall surface of the stator connecting shaft;
the outer wall of the stator connecting shaft is also provided with a wire passing bracket positioned above the connecting boss, and the wire passing bracket is provided with a bracket wire passing hole;
the Hall reversing sensor and the Hall absolute original point sensor are all installed on the Hall installation plate.
In the invention, the wire passing bracket can be used for supporting the magnetic field generating component. The stator connecting shaft is of a hollow structure and is used for connecting the positioning structure, and through the arrangement of the bracket wire passing holes and the Hall wire passing holes, hall wires (Hall mounting plates) and three-phase wires (circuit boards) can be led out from the stator connecting shaft through the connecting shaft wire passing holes. The invention replaces the traditional connecting shaft with the hollow stator connecting shaft to realize the positioning of the motor, which can greatly shorten the axial and radial space of the motor, and simultaneously, the hollow stator connecting shaft is convenient for leading out the Hall wires and the three-phase wires and is convenient for maintaining the Hall wires and the three-phase wires. The inner wall surface of the stator connecting shaft can be provided with a connecting shaft shoulder to realize connection with the positioning structure, so that an additional connecting auxiliary structure can be omitted. In addition, both ends of stator connecting axle all can be connected with location structure, do not have the direction restriction, can improve the commonality that the motor used greatly.
Further, the wire passing support is provided with a support connecting section contacted with the connecting boss, the inner side end of the support connecting section is provided with a support sleeving section sleeved on the stator connecting shaft in an extending mode, and the outer side end of the support connecting section is provided with a plurality of support dividing sections which are annularly arranged in an extending mode.
In the invention, the number of the bracket segments is equal to the number of the stator slots on the silicon steel sheet, and the bracket segments are adapted to the bottom end parts of the stator slot openings.
In order to ensure synchronous rotation of the wire passing bracket and the stator connecting shaft, further, a bracket limiting groove axially arranged along the outer surface of the stator connecting shaft is formed;
the inner surface of the support sleeving section is provided with support limiting protrusions which are matched with the support limiting grooves in an embedded mode in an extending mode.
Further, a bracket hollow groove is formed in the bracket connecting section. In this way, it is possible to facilitate guiding of the hall wire or the three-phase wire.
Further, an elastic wire passing sleeve is arranged at the wire passing hole of the support. The elastic wire passing sleeve can not only position the Hall wire and the three-phase wire by using the self elastic force, but also protect the Hall wire and the three-phase wire from being worn.
In order to realize stable connection of the rotor shell and the load, further, a shell connection boss is arranged on the outer surface of the rotor shell.
Further, the outer surface of the stator connecting shaft is sequentially provided with a first bearing connecting section, a circuit board connecting section, a magnetic field generating assembly connecting section, a Hall sensing connecting section and a second bearing connecting section from top to bottom, a bearing limiting groove which is arranged along the axial direction of the stator connecting shaft is further formed between the first bearing connecting section and the circuit board connecting section on the outer surface of the stator connecting shaft, and the outer diameter of the Hall sensing connecting section is larger than that of the second bearing connecting section and the magnetic field generating assembly connecting section;
the two bearings are arranged and are respectively connected with the first bearing connecting section and the second bearing connecting section, and the bearing limiting clamp spring capable of preventing the bearing from axially moving is arranged at the bearing limiting groove.
In the invention, the first bearing connecting section and the second bearing connecting section are both used for connecting bearings. The magnetic field generating assembly connecting section is used for installing a silicon steel sheet. The Hall sensing connection section can be provided with the connection boss and the connection shaft wire passing hole, and the wire passing bracket and the Hall mounting plate are both positioned at the Hall sensing connection section. The outer diameter of the Hall sensing connecting section is larger than that of the magnetic field generating assembly connecting section, and the position of the silicon steel sheet can be further fixed. The outer diameter of the Hall sensing connecting section is larger than that of the second bearing connecting section, so that the bearing can be prevented from moving axially; in the same way, the bearing limiting clamp spring can also prevent the bearing from axially moving.
Further, the stator connecting shaft is equal in axial length to the rotor housing. In this way, it is convenient to improve the axial space of the motor.
Further, an annular limiting protrusion is arranged on the inner wall surface of the rotor shell, and the top end of the annular limiting protrusion is connected with the outer ring of the bearing positioned at the first bearing connecting section;
the rotor isolation tube is positioned in a region between the annular limiting bulge and the bearing connected to the second bearing connecting section, the inner wall surface of the rotor shell is provided with the annular limiting bulge, and the top end of the annular limiting bulge is connected with the outer ring of the bearing positioned in the first bearing connecting section;
the rotor isolation tube is located in an area between the annular spacing protrusion and a bearing connected to the second bearing connection section.
In this embodiment, the annular spacing projections may locate the axial position of the rotor isolation tube.
Further, a thread groove is formed at the joint of the rotor shell and the rotor isolation pipe.
The arrangement of the thread grooves can increase the contact area of glue and improve the stability of connection between the rotor shell and the rotor isolation tube.
The invention has the following beneficial effects:
1. the Hall absolute origin induction magnetic ring is additionally arranged, the Hall absolute origin sensor can output a standard voltage square wave periodic signal with a mechanical angle of 360 degrees through the Hall absolute origin induction magnetic ring, and the circumferential position of the outer rotor relative to the inner stator can be obtained after the circuit board receives the signal, so that the control accuracy can be effectively improved.
2. The invention replaces the traditional connecting shaft with the hollow stator connecting shaft to realize the positioning of the motor, which can greatly shorten the axial and radial space of the motor, and simultaneously, the hollow stator connecting shaft is convenient for leading out the Hall wires and the three-phase wires and is convenient for maintaining the Hall wires and the three-phase wires.
3. The inner wall surface of the stator connecting shaft can be provided with a connecting shaft shoulder to realize connection with the positioning structure, so that an additional connecting auxiliary structure can be omitted. In addition, both ends of stator connecting axle all can be connected with location structure, do not have the direction restriction, can improve the commonality that the motor used greatly.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required for describing the embodiments of the present invention will be briefly described. It is apparent that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained from the following drawings without inventive labor for those skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of an external rotor brushless motor with an absolute origin signal according to the present invention;
FIG. 2 is a cross-sectional view of one embodiment of an external rotor brushless motor with absolute origin signal according to the present invention;
FIG. 3 is a schematic diagram illustrating a magnetic field generating assembly and a Hall sensing assembly in an external rotor brushless motor with an absolute origin signal according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a magnetic field generating assembly of an external rotor brushless motor with an absolute origin signal according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a structure of a wire passing bracket in an external rotor brushless motor with an absolute origin signal according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a stator connecting shaft in an external rotor brushless motor with an absolute origin signal according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a stator connecting shaft in an external rotor brushless motor with an absolute origin signal according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a rotor housing of an external rotor brushless motor with an absolute origin signal according to an embodiment of the present invention;
fig. 9 is a signal diagram of the output of the hall absolute origin sensor in the external rotor brushless motor with the absolute origin signal according to the present invention.
Wherein, the spare part names that the reference numerals correspond to are as follows: 1. the stator connecting shaft, 2, the rotor shell, 3, the bearing, 4, the connecting shaft wire passing hole, 5, the connecting boss, 6, the wire passing bracket, 7, the bracket wire passing hole, 8, the Hall mounting plate, 9, the Hall wire passing hole, 10, the bracket sleeve section, 11, the bracket dividing section, 12, the bracket limiting groove, 13, the bracket limiting bulge, 14, the bracket hollow groove, 15, the circuit board, 16, the elastic wire passing sleeve, 17, the annular limiting bulge, 18, the rotor isolating tube, 19, the shell connecting boss, 20, the first bearing connecting section, 21, the circuit board connecting section, 22 and the magnetic field generating component connecting section, 23, a Hall sensing connecting section, 24, a second bearing connecting section, 25, a bearing limit groove, 26, a bearing limit clamp spring, 27, a thread groove, 28, a magnet, 29, a silicon steel sheet, 30, a silicon steel sheet support section, 31, a stator groove, 32, an electromagnetic wire, 33, a first rotor magnetism isolating ring, 34, a Hall reversing sensing magnetic ring, 35, a second rotor magnetism isolating ring, 36, a Hall absolute origin sensing magnetic ring, 37, a Hall lead, 38, a three-phase lead, 39, a silicon steel sheet limit bulge, 40, a Hall reversing sensor, 41, a Hall absolute origin sensor, 42 and a support connecting section.
Detailed Description
In order to enable those skilled in the art to better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the embodiments described below are only some, but not all, of the embodiments of the present invention. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are within the scope of the present invention based on the embodiments described herein.
Example 1
As shown in fig. 1 to 9, an external rotor brushless motor with an absolute origin signal comprises a stator connecting shaft 1 and a rotor housing 2, wherein the rotor housing 2 is connected to the periphery of the stator connecting shaft 1 through a bearing 3, and the stator connecting shaft 1 and the rotor housing 2 are coaxially arranged;
the outer wall of the stator connecting shaft 1 is connected with a dynamic magnetic field group and a circuit board 15;
a rotor isolation tube 18 is arranged on the inner wall of the rotor shell 2, and a static magnetic field group coupled with the dynamic magnetic field group and a Hall sensing assembly positioned below the static magnetic field group are arranged on the inner wall of the rotor isolation tube 18;
the Hall sensing assembly comprises a first rotor magnetism isolating ring 33, a Hall reversing sensing magnetic ring 34, a second rotor magnetism isolating ring 35 and a Hall absolute origin sensing magnetic ring 36 which are sequentially arranged from top to bottom, and also comprises a Hall reversing sensor 40 capable of sensing the Hall reversing sensing magnetic ring 34 and a Hall absolute origin sensor 41 capable of sensing the Hall absolute origin sensing magnetic ring 36.
In this embodiment, a 12-slot dynamic magnetic field set and a 14-pole static magnetic field set may be used. Both the hall commutation sensor 40 and the hall absolute home sensor 41 can be US1881.
Example 2
This embodiment is further defined on the basis of embodiment 1 as follows: the stator connecting shaft 1 is arranged in a hollow mode, a through wire hole 4 penetrating through the inner wall and the outer wall of the stator connecting shaft 1 is formed in the stator connecting shaft 1, and a connecting boss 5 is further arranged on the outer wall surface of the stator connecting shaft 1;
the outer wall of the stator connecting shaft 1 is also provided with a wire passing bracket 6 positioned above the connecting boss 5, and the wire passing bracket 6 is provided with a bracket wire passing hole 7;
the Hall installation plate 8 positioned below the wire passing bracket 6 is connected to the connecting boss 5, a Hall wire passing hole 9 is formed in the Hall installation plate 8, and the Hall reversing sensor 40 and the Hall absolute original point sensor 41 are both installed on the Hall installation plate 8.
In this embodiment, since the hall commutation induction magnet ring 34 is located above the hall absolute origin induction magnet ring 36, the hall commutation sensor 40 can be mounted on the top end of the hall mounting plate 8, and the hall absolute origin sensor 41 can be mounted on the bottom end of the hall mounting plate 8.
In order to realize the connection between the stator connecting shaft 1 and the positioning structure, a connecting shaft shoulder can be arranged on the inner surface of the stator connecting shaft 1, and connecting threads can be further arranged on the inner surface of the stator connecting shaft 1 so as to facilitate the positioning connection of the motor. The circuit board 15 may be connected above the 12-slot dynamic magnetic field set. The wire passing bracket 6 is sleeved on the outer wall surface of the stator connecting shaft 1, the wire passing bracket 6 can be connected to the upper end of the connecting boss 5, and the wire passing bracket 6 can also be directly supported through the connecting boss 5.
Preferably, an elastic wire passing sleeve 16 is arranged at the support wire passing hole 7. The elastic thread passing sleeve 16 can be made of silica gel, rubber and the like.
The outer surface of the rotor housing 2 is provided with housing attachment bosses 19.
Preferably, the stator connecting shaft 1 is equal in axial length to the rotor housing 2.
In this embodiment, the bearing 3 may be a ball bearing.
Example 3
This embodiment is further defined on the basis of embodiment 2 as follows: the wire passing support 6 is provided with a support connecting section 42 contacted with the connecting boss 5, the inner side end of the support connecting section 42 is provided with a support sleeving section 10 sleeved on the stator connecting shaft 1 in an extending mode, and the outer side end of the support connecting section 42 is provided with a plurality of support dividing sections 11 which are annularly arranged in an extending mode.
In this embodiment, the bracket connecting section 42 may be connected to the top end of the connecting boss 5.
Preferably, the outer surface of the stator connecting shaft 1 is provided with a bracket limiting groove 12 arranged along the axial direction of the stator connecting shaft;
the inner surface of the support sleeving section 10 is provided with a support limiting protrusion 13 which is matched with the support limiting groove 12 in an embedded mode in an extending mode.
In order to improve the stability of the connection between the silicon steel sheet and the stator connecting shaft 1 in the magnetic field generating assembly, silicon steel sheet limiting protrusions 39 which can be matched with the bracket limiting grooves 12 in an embedded manner can be arranged on the inner surface of the silicon steel sheet.
Preferably, the bracket connecting section 42 is provided with a bracket hollow-out groove 14.
Example 4
This embodiment is further defined as follows based on any one of embodiments 2-3: the outer surface of the stator connecting shaft 1 is sequentially provided with a first bearing connecting section 20, a circuit board connecting section 21, a magnetic field generating component connecting section 22, a Hall sensing connecting section 23 and a second bearing connecting section 24 from top to bottom, a bearing limiting groove 25 which is arranged along the circumferential direction of the stator connecting shaft 1 is further formed between the first bearing connecting section 20 and the circuit board connecting section 21 on the outer surface of the stator connecting shaft 1, and the outer diameter of the Hall sensing connecting section 23 is larger than that of the second bearing connecting section 24 and the magnetic field generating component connecting section 22;
the two bearings 3 are arranged, the two bearings 3 are respectively connected with the first bearing connecting section 20 and the second bearing connecting section 24, and the bearing limiting clamp spring 26 capable of preventing the bearings 3 from moving axially is arranged at the bearing limiting groove 25.
In this embodiment, the first bearing connection section 20 and the second bearing connection section 24 may be equally large.
Preferably, an annular limiting protrusion 17 is arranged on the inner wall surface of the rotor housing 2, and the top end of the annular limiting protrusion 17 is connected with the outer ring of the bearing 3 positioned at the first bearing connecting section 20;
the rotor isolation tube 18 is located in the region between the annular limit projection 17 and the bearing 3 connected to the second bearing connection section 24.
Preferably, a screw groove 27 is provided at the connection of the rotor housing 2 and the rotor isolation tube 18.
In this embodiment, the screw grooves may be provided on the inner surface of the rotor housing 2 or on the outer surface of the rotor isolation tube 18.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments, and it is not intended that the invention be limited to these descriptions. Other embodiments of the invention, which are apparent to those skilled in the art to which the invention pertains without departing from its technical scope, shall be covered by the protection scope of the invention.
Claims (9)
1. An external rotor brushless motor with absolute origin signal, characterized in that: the motor rotor comprises a stator connecting shaft (1) and a rotor shell (2), wherein the rotor shell (2) is connected to the periphery of the stator connecting shaft (1) through a bearing (3), and the stator connecting shaft (1) and the rotor shell (2) are coaxially arranged;
the outer wall of the stator connecting shaft (1) is connected with a dynamic magnetic field group and a circuit board (15);
a rotor isolation tube (18) is arranged on the inner wall of the rotor shell (2), and a static magnetic field group coupled with the dynamic magnetic field group and a Hall induction component positioned below the static magnetic field group are arranged on the inner wall of the rotor isolation tube (18);
the Hall induction assembly comprises a first rotor magnetism isolating ring (33), a Hall reversing induction magnetic ring (34), a second rotor magnetism isolating ring (35) and a Hall absolute origin induction magnetic ring (36) which are sequentially arranged from top to bottom, and further comprises a Hall reversing sensor (40) for inducing the Hall reversing induction magnetic ring (34) and a Hall absolute origin sensor (41) for inducing the Hall absolute origin induction magnetic ring (36);
the stator connecting shaft (1) is arranged in a hollow mode, and connecting shaft wire through holes (4) penetrating through the inner wall and the outer wall of the stator connecting shaft are formed in the stator connecting shaft (1);
a connecting boss (5) is arranged on the outer wall surface of the stator connecting shaft (1);
the outer wall of the stator connecting shaft (1) is also provided with a wire passing bracket (6) positioned above the connecting boss (5), and the wire passing bracket (6) is provided with a bracket wire passing hole (7);
the Hall reversing sensor comprises a connecting boss (5), a Hall mounting plate (8) positioned below a wire passing bracket (6) is connected to the connecting boss, a Hall wire passing hole (9) is formed in the Hall mounting plate (8), and a Hall reversing sensor (40) and a Hall absolute original point sensor (41) are mounted on the Hall mounting plate (8).
2. The external rotor brushless motor with absolute origin signal according to claim 1, wherein: the wire passing support (6) is provided with a support connecting section (42) which is in contact with the connecting boss (5), a support sleeving section (10) sleeved on the stator connecting shaft (1) is arranged at the inner side end of the support connecting section (42) in an extending mode, and a plurality of support segmentation sections (11) which are annularly arranged extend upwards at the outer side end of the support connecting section (42).
3. The external rotor brushless motor with absolute origin signal according to claim 2, wherein: the outer surface of the stator connecting shaft (1) is provided with a bracket limiting groove (12) arranged along the axial direction of the stator connecting shaft;
the inner surface of the support sleeving section (10) is provided with a support limiting protrusion (13) which is matched with the support limiting groove (12) in a imbedding mode in an extending mode.
4. The external rotor brushless motor with absolute origin signal according to claim 2, wherein: and a bracket hollow groove (14) is formed in the bracket connecting section (42).
5. The external rotor brushless motor with absolute origin signal according to claim 1, wherein: an elastic wire passing sleeve (16) is arranged at the position of the support wire passing hole (7).
6. The external rotor brushless motor with absolute origin signal according to claim 1, wherein: the outer surface of the rotor shell (2) is provided with a shell connecting boss (19).
7. The external rotor brushless motor with absolute origin signal according to any one of claims 1 to 6, wherein: the stator connecting shaft (1) is sequentially provided with a first bearing connecting section (20), a circuit board connecting section (21), a magnetic field generating assembly connecting section (22), a Hall sensing connecting section (23) and a second bearing connecting section (24) from top to bottom, a bearing limiting groove (25) which is annularly arranged along the stator connecting shaft (1) is further formed between the first bearing connecting section (20) and the circuit board connecting section (21) on the outer surface of the stator connecting shaft (1), and the outer diameter of the Hall sensing connecting section (23) is larger than that of the second bearing connecting section (24) and the magnetic field generating assembly connecting section (22);
the two bearings (3) are arranged, the two bearings (3) are respectively connected to the first bearing connecting section (20) and the second bearing connecting section (24), and the bearing limiting clamp spring (26) capable of preventing the bearings (3) from moving axially is arranged at the bearing limiting groove (25).
8. The external rotor brushless motor with absolute origin signal according to claim 7, wherein: the stator connecting shaft (1) and the rotor housing (2) have the same axial length.
9. The external rotor brushless motor with absolute origin signal according to claim 7, wherein: an annular limiting protrusion (17) is arranged on the inner wall surface of the rotor shell (2), and the top end of the annular limiting protrusion (17) is connected with the outer ring of the bearing (3) positioned at the first bearing connecting section (20); the rotor isolation tube (18) is located in the region between the annular limiting projection (17) and the bearing (3) connected to the second bearing connection section (24).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910705402.4A CN110311514B (en) | 2019-07-31 | 2019-07-31 | External rotor brushless motor with absolute origin signal |
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| CN201910705402.4A CN110311514B (en) | 2019-07-31 | 2019-07-31 | External rotor brushless motor with absolute origin signal |
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| CN110311514B true CN110311514B (en) | 2024-03-22 |
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| CN110685129A (en) * | 2019-10-25 | 2020-01-14 | 台州市信恩电子科技有限公司 | Door opening speed reducer of washing machine |
| CN112087108B (en) * | 2020-09-15 | 2022-05-20 | 湖南普东科技有限责任公司 | Rare earth permanent magnet synchronous motor with absolute origin signal |
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| CN210431159U (en) * | 2019-07-31 | 2020-04-28 | 重庆灵龙实业发展有限公司 | External rotor brushless motor with absolute origin signal |
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| TWI285017B (en) * | 2005-06-30 | 2007-08-01 | Delta Electronics Inc | Brushless DC motor and magnetic compensation method thereof |
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| GB1435314A (en) * | 1972-05-25 | 1976-05-12 | Massachusetts Inst Technology | Superconducting rotating electrical machines |
| CN201860242U (en) * | 2010-11-10 | 2011-06-08 | 浙江方德机电制造有限公司 | Position and speed detection device for rotor of motor |
| CN203445753U (en) * | 2013-08-23 | 2014-02-19 | 浙江尤里卡机电有限公司 | Motor with external paster type Hall |
| CN104617711A (en) * | 2015-01-21 | 2015-05-13 | 广东威灵电机制造有限公司 | Induction machine |
| CN210431159U (en) * | 2019-07-31 | 2020-04-28 | 重庆灵龙实业发展有限公司 | External rotor brushless motor with absolute origin signal |
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|---|---|
| CN110311514A (en) | 2019-10-08 |
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