CN105762992A - Angle sending device for permanent magnet rotation of motor shaft end - Google Patents
Angle sending device for permanent magnet rotation of motor shaft end Download PDFInfo
- Publication number
- CN105762992A CN105762992A CN201610270762.2A CN201610270762A CN105762992A CN 105762992 A CN105762992 A CN 105762992A CN 201610270762 A CN201610270762 A CN 201610270762A CN 105762992 A CN105762992 A CN 105762992A
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- permanent magnet
- motor shaft
- yoke
- dispensing device
- motor
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Abstract
The invention discloses an angle sending device for permanent magnet rotation of a motor shaft end. The device is composed of a motor shaft, s motor end cover, a magnetic yoke, permanent magnets, a sensing chip, a circuit board and a magnetic isolation sheet. A motor and the motor end cover are installed together, wherein the inner holes of the motor and the motor end cover are in a coaxial mode; the motor shaft end extends into the magnetic yoke in a sleeving mode; the magnetic yoke is arranged at the inner hole of the outer side of the end cover; two permanent magnets with different magnetizing directions are embedded into the magnetic yoke; and the magnetic isolation sheet is embedded between the two permanent magnets. The motor end cover and the circuit board are connected and supported by support posts; and the two ends of the support posts are connected with the motor end cover and the circuit board. The sensing chip is arranged at the position, approaching the permanent magnets, of the circuit board; and the sensing chip and the permanent magnets are opposite to each other without any contact. According to the invention, the occupied space is small; the device can be installed easily; the detection precision is high; and the device is resistant to a severe environment.
Description
Technical field
The invention belongs to machine field, be more particularly to a kind of motor shaft end rotating permanent magnet angle dispensing device.
Background technology
Existing widely used driving system for brushless motor, is usually and is made up of motor body, controller and inverter, and running well of motor needs detect the position of rotor in real time and carry out commutation control accurately, and the GPS survey efficiency of guarantee motor is run.
Existing common driving system for brushless motor, many employing following methods make brush: one, the permanent magnet of radial magnetizing installed by rotor, and motor case installs induction chip；Two, employing includes stator and the two-part rotary transformer of patent, is separately mounted on motor case and machine shaft；Three, detection counter electromotive force of motor, magnetic linkage or impulses injection etc. are adopted to realize the detection to rotor-position without the control algolithm of position sensor in kind.
But, adopt the permanent magnet of radial magnetizing, it is generally the case that the number of poles of permanent magnet is equal with motor pole number, when motor pole number increases, permanent magnet installation difficulty, when installing space is narrow and small, permanent magnet be difficult to install or casing induction chip to detect error bigger.
Adopt rotary transformer detection rotor-position, it usually needs taking the radial and axial space of more motor, the input stimulus of rotary transformer stator and output signal line need the Distance Transmission grown to fall demodulation controller very much.
Adopting the control algolithm without position sensor in kind, all there is some problems in its reliability, fault-tolerance, it is generally the case that the motor only for particular condition is suitable for.
Summary of the invention
In order to solve said one or multiple technical problem, the present invention provide a kind of take up room little be easily installed, motor shaft end rotating permanent magnet angle dispensing device that accuracy of detection is higher and comparatively durable.
Technical scheme is as follows:
Motor shaft end rotating permanent magnet angle dispensing device, including motor shaft, electric motor end cap, yoke, permanent magnet, induction chip, circuit board and antifreeze plate, the female coaxial of described motor shaft and electric motor end cap is installed, it is provided with yoke between described motor shaft and electric motor end cap, the end of described motor shaft is located in yoke, described curvature is located in the endoporus of electric motor end cap, in described yoke, pincers are provided with the permanent magnet of two pieces of different magnetizing directions, between two pieces of described permanent magnets, pincers are provided with antifreeze plate, it is provided with pillar between described electric motor end cap and circuit board, the two ends of described pillar are connected with electric motor end cap and circuit board respectively, described circuit board is provided with induction chip towards the one side of permanent magnet, described induction chip is oppositely arranged with permanent magnet and does not contact.
It has the beneficial effect that the present invention adopts induction chip detection detection rotor-position, takes up room little, and detection speed is fast；The magnetic induction that induction chip receives; produced and together decided on by yoke and antifreeze plate the distribution characteristics of magnetic induction by permanent magnet; owing to angle information is by space magnetic field transmission; it is consequently belonging to contactless transmission angle information; the extreme operating conditions such as the high/low temperature of sending side can't directly to being generally not capable of bearing high/low temperature induction chip or component causes damage; play the effect of protection induction chip, make device comparatively durable.
In some embodiments, described permanent magnet is the permanent magnet of axial charging, and two pieces of permanent magnets are towards the opposite polarity of one end of described induction chip.
It has the beneficial effect that the permanent magnet of the present invention is axial charging, when motor progression increases, it is not necessary to increase permanent magnet, it is simple to install permanent magnet, it is ensured that the accuracy of detection of induction chip.
In some embodiments, the end of motor shaft is provided with flat mouth cylinder, and the medial wall of yoke is provided with flat mouth through hole, in the flat mouth through hole installing yoke with flat mouth cylinder of motor shaft ends.
It has the beneficial effect that the end being easy to motor shaft is firmly located in yoke.
In some embodiments, antifreeze plate is made up of non-magnet_conductible material.
It has the beneficial effect that the antifreeze plate not possessing magnetic conduction function just can play the effect every magnetic, by planning that non-magnetic magnetic circuit path ensures maximum accurate measurement angle.
In some embodiments, yoke is made up of permeability magnetic material.
It has the beneficial effect that the yoke that permeability magnetic material supports has magnetic conduction function, by planning that the magnetic circuit path of magnetic conduction ensures maximum accurate measurement angle.
In some embodiments, permanent magnet is semicylinder shape, and the lateral wall of permanent magnet is provided with semicylinder shape fin, and the medial wall of yoke is provided with semicylinder shape groove, and semicylinder shape fin is fastened in semicylinder shape groove.
It has the beneficial effect that by being fastened in semicylinder shape groove by semicylinder shape fin so that it is connection comparatively firm.
In some embodiments, permanent magnet axially protrudes in yoke, and permanent magnet protrudes from the distance thickness more than antifreeze plate of yoke.
It has the beneficial effect that guarantee antifreeze plate is by completely isolated for two pieces of permanent magnets, by air is planned every the magnetic circuit path of magnetic, it is ensured that maximum accurate measurement angle.
In some embodiments, induction chip, antifreeze plate and motor shaft are centrally located on straight line.
It has the beneficial effect that accuracy of detection is higher.
In some embodiments, it is filled with adhesive in the space between motor shaft, yoke, permanent magnet and antifreeze plate.
It has the beneficial effect that the effect playing bonding, it is ensured that enough assembling intensity, prevents oxidized simultaneously.
In some embodiments, induction chip welds on circuit boards.
It has the beneficial effect that and is welded to connect comparatively firmly, and mounting process simplifies.
Accompanying drawing explanation
Fig. 1 is the assembling schematic diagram of the motor shaft end rotating permanent magnet angle dispensing device of an embodiment of the present invention；
Fig. 2 is the structural representation of the motor shaft end rotating permanent magnet angle dispensing device of an embodiment of the present invention；
Fig. 3 is the exploded perspective view of the motor shaft end rotating permanent magnet angle dispensing device of an embodiment of the present invention；
Fig. 4 is the structural representation of the yoke of the motor shaft end rotating permanent magnet angle dispensing device of an embodiment of the present invention.
The title of the corresponding component that numeral is represented in figure:
1. motor shaft, 2. yoke, 21. flat mouthfuls of through holes, 22. semicylinder shape grooves, 3. electric motor end cap, 4. pillar, 5. permanent magnet, 51. semicylinder shape fins, 6. induction chip, 7. circuit board, 8. screw, 9. antifreeze plate.
Detailed description of the invention
As Figure 1-4, disclosure one motor shaft 1 end rotating permanent magnet 5 angle dispensing device, including motor shaft 1, electric motor end cap 3, yoke 2, permanent magnet 5, induction chip 6, circuit board 7, antifreeze plate 9 and screw 8.Being located in electric motor end cap 3 of motor shaft 1.The female coaxial of motor shaft 1 and electric motor end cap 3 is installed.Yoke 2 it is provided with between motor shaft 1 and electric motor end cap 3.The end of motor shaft 1 is located in yoke 2.Yoke 2 part is located in the endoporus of electric motor end cap 3.Yoke 2 is embedded with the permanent magnet 5 of two pieces of different magnetizing directions.It is embedded with antifreeze plate 9 between two pieces of permanent magnets 5.Pillar 4 it is provided with between electric motor end cap 3 and circuit board 7.Pillar 4 is vertically arranged with electric motor end cap 3 and circuit board 7 respectively.The two ends of pillar 4 are connected with electric motor end cap 3 and circuit board 7 respectively.Threaded with electric motor end cap 3 in the end of pillar 4, pillar 4 and circuit board 7 are connected by screw 8, screw 8 is screwed onto in pillar 4, circuit board 7 is provided with induction chip 6 towards the one side of two pieces of permanent magnets 5, induction chip 6 is oppositely arranged with permanent magnet 5 and does not contact, permanent magnet 5 is axial charging, and two pieces of permanent magnets 5 are towards the opposite polarity of one end of induction chip 6.Two pieces of permanent magnets 5 are N pole and S pole towards induction chip 6 respectively.
The present invention adopts induction chip 6 detection detection rotor-position, takes up room little, and detection speed is fast；The magnetic induction that induction chip 6 receives, produced and together decided on by yoke 2 and antifreeze plate 9 distribution characteristics of magnetic induction by permanent magnet 5, owing to angle information is by space magnetic field transmission, being consequently belonging to contactless transmission angle information, the extreme operating condition such as high/low temperature of sending side can't directly to being generally not capable of bearing high/low temperature induction chip or component causes damage；The permanent magnet 5 of the present invention is axial charging, when motor progression increases, it is not necessary to increase permanent magnet 5, it is simple to install permanent magnet 5, it is ensured that the accuracy of detection of induction chip 6.
In the present embodiment, before installation, at the surface coating stick of motor shaft 1, yoke 2, permanent magnet 5 and antifreeze plate 9.The end of motor shaft 1 is provided with flat mouth cylinder, and the medial wall of yoke 2 is provided with flat mouth through hole, in the flat mouth through hole 21 installing yoke 2 with flat mouth cylinder 11 of motor shaft 1 end.The end being easy to motor shaft 1 is firmly located in yoke 2.Antifreeze plate 9 is made up of non-magnet_conductible material.The antifreeze plate 9 not possessing magnetic conduction function just can play the effect every magnetic, by planning that non-magnetic magnetic circuit path ensures maximum accurate measurement angle.Yoke 2 is made up of permeability magnetic material.The yoke 2 that permeability magnetic material supports has magnetic conduction function, by planning that the magnetic circuit path of magnetic conduction ensures maximum accurate measurement angle.Permanent magnet 5 is semicylinder shape, and the lateral wall of permanent magnet 5 is provided with semicylinder shape fin 51, and the medial wall of yoke 2 is provided with semicylinder shape groove 22, and semicylinder shape fin 51 is fastened in semicylinder shape groove 22.By semicylinder shape fin 51 is fastened in semicylinder shape groove 22 so that it is connection comparatively firm.Permanent magnet 5 axially protrudes in yoke 2, and permanent magnet 5 protrudes from the distance thickness more than antifreeze plate 9 of yoke 2.Ensure that antifreeze plate 9 is by completely isolated for two pieces of permanent magnets 5, by air is planned every the magnetic circuit path of magnetic, it is ensured that maximum accurate measurement angle.Induction chip 6, antifreeze plate 9 and motor shaft 1 are centrally located on straight line.Accuracy of detection is higher.It is filled with adhesive in space between motor shaft 1, yoke 2, permanent magnet 5 and antifreeze plate 9.Play the effect of bonding, it is ensured that enough assembling intensity, prevent oxidized simultaneously.Induction chip 6 is welded on circuit board 7.Being welded to connect comparatively firm, mounting process simplifies.
Above in conjunction with accompanying drawing, some embodiments of the present invention are elaborated, but the invention is not restricted to line number embodiment, in the ken that those of ordinary skill in the art possess, it is also possible under the premise without departing from present inventive concept, make various change.
Claims (10)
1. motor shaft end rotating permanent magnet angle dispensing device, it is characterized in that, including motor shaft, electric motor end cap, yoke, permanent magnet, induction chip, circuit board and antifreeze plate, the female coaxial of described motor shaft and electric motor end cap is installed, it is provided with yoke between described motor shaft and electric motor end cap, the end of described motor shaft is located in yoke, described curvature is located in the endoporus of electric motor end cap, in described yoke, pincers are provided with the permanent magnet of two pieces of different magnetizing directions, between two pieces of described permanent magnets, pincers are provided with antifreeze plate, it is provided with pillar between described electric motor end cap and circuit board, the two ends of described pillar are connected with electric motor end cap and circuit board respectively, described circuit board is provided with induction chip towards the one side of permanent magnet, described induction chip is oppositely arranged with permanent magnet and does not contact.
2. motor shaft end rotating permanent magnet angle dispensing device according to claim 1, it is characterised in that described permanent magnet is the permanent magnet of axial charging, two pieces of permanent magnets are towards the opposite polarity of one end of described induction chip.
3. motor shaft end rotating permanent magnet angle dispensing device according to claim 1, it is characterized in that, the end of described motor shaft is provided with flat mouth cylinder, and the medial wall of described yoke is provided with flat mouth through hole, in the flat mouth through hole installing yoke with flat mouth cylinder of described motor shaft ends.
4. motor shaft end rotating permanent magnet angle dispensing device according to claim 1, it is characterised in that described antifreeze plate is made up of non-magnet_conductible material.
5. motor shaft end rotating permanent magnet angle dispensing device according to claim 1, it is characterised in that described yoke is made up of permeability magnetic material.
6. motor shaft end rotating permanent magnet angle dispensing device according to claim 1, it is characterized in that, described permanent magnet is semicylinder shape, the lateral wall of described permanent magnet is provided with semicylinder shape fin, the medial wall of described yoke is provided with semicylinder shape groove, and described semicylinder shape fin is fastened in semicylinder shape groove.
7. motor shaft end rotating permanent magnet angle dispensing device according to claim 1, it is characterised in that described permanent magnet axially protrudes in yoke, and described permanent magnet protrudes from the distance thickness more than antifreeze plate of yoke.
8. motor shaft end rotating permanent magnet angle dispensing device according to claim 1, it is characterised in that described induction chip, antifreeze plate and motor shaft are centrally located on straight line.
9. motor shaft end rotating permanent magnet angle dispensing device according to claim 1, it is characterised in that be filled with adhesive in the space between described motor shaft, yoke, permanent magnet and antifreeze plate.
10. motor shaft end rotating permanent magnet angle dispensing device according to claim 1, it is characterised in that described induction chip welds on circuit boards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610270762.2A CN105762992B (en) | 2016-04-27 | 2016-04-27 | Motor shaft end rotating permanent magnet angle sending device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610270762.2A CN105762992B (en) | 2016-04-27 | 2016-04-27 | Motor shaft end rotating permanent magnet angle sending device |
Publications (2)
| Publication Number | Publication Date |
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| CN105762992A true CN105762992A (en) | 2016-07-13 |
| CN105762992B CN105762992B (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610270762.2A Active CN105762992B (en) | 2016-04-27 | 2016-04-27 | Motor shaft end rotating permanent magnet angle sending device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109923769A (en) * | 2016-11-16 | 2019-06-21 | 三菱电机株式会社 | Device for detecting rotational position |
| CN110870177A (en) * | 2017-07-14 | 2020-03-06 | 三菱电机株式会社 | Rotating motor and door device using same |
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| CN1815860A (en) * | 2005-02-01 | 2006-08-09 | 日本电产三协株式会社 | Minitype electromotor with encoder |
| CN101557142A (en) * | 2008-03-31 | 2009-10-14 | 山洋电气株式会社 | Motor with an electromagnetic brake |
| CN102017374A (en) * | 2008-06-13 | 2011-04-13 | 三菱电机株式会社 | Motor positioning structure |
| CN105048756A (en) * | 2015-06-13 | 2015-11-11 | 德州恒力电机有限责任公司 | Adjustable permanent magnet motor rotor position detection and sensor installation device |
| CN205583940U (en) * | 2016-04-27 | 2016-09-14 | 无锡市河埒传感器有限公司 | Motor axle head rotating permanent magnet angle dispensing device |
-
2016
- 2016-04-27 CN CN201610270762.2A patent/CN105762992B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1815860A (en) * | 2005-02-01 | 2006-08-09 | 日本电产三协株式会社 | Minitype electromotor with encoder |
| CN101557142A (en) * | 2008-03-31 | 2009-10-14 | 山洋电气株式会社 | Motor with an electromagnetic brake |
| US20090284105A1 (en) * | 2008-03-31 | 2009-11-19 | Sanyo Denki Co., Ltd. | Motor with an electromagnetic brake |
| CN102017374A (en) * | 2008-06-13 | 2011-04-13 | 三菱电机株式会社 | Motor positioning structure |
| CN105048756A (en) * | 2015-06-13 | 2015-11-11 | 德州恒力电机有限责任公司 | Adjustable permanent magnet motor rotor position detection and sensor installation device |
| CN205583940U (en) * | 2016-04-27 | 2016-09-14 | 无锡市河埒传感器有限公司 | Motor axle head rotating permanent magnet angle dispensing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109923769A (en) * | 2016-11-16 | 2019-06-21 | 三菱电机株式会社 | Device for detecting rotational position |
| US11204261B2 (en) | 2016-11-16 | 2021-12-21 | Mitsubishi Electric Corporation | Rotational position detection device |
| CN110870177A (en) * | 2017-07-14 | 2020-03-06 | 三菱电机株式会社 | Rotating motor and door device using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105762992B (en) | 2019-02-01 |
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