CN201213237Y - Magnetic field speed reducing type large torque permanent magnet brushless DC motor - Google Patents
Magnetic field speed reducing type large torque permanent magnet brushless DC motor Download PDFInfo
- Publication number
- CN201213237Y CN201213237Y CNU2008201214366U CN200820121436U CN201213237Y CN 201213237 Y CN201213237 Y CN 201213237Y CN U2008201214366 U CNU2008201214366 U CN U2008201214366U CN 200820121436 U CN200820121436 U CN 200820121436U CN 201213237 Y CN201213237 Y CN 201213237Y
- Authority
- CN
- China
- Prior art keywords
- magnetic field
- stator
- permanent
- large torque
- magnet brushless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model discloses a magnetic field speed reduced permanent-magnetic brushness DC motor with low speed and large torque, comprising an inner stator, an outer stator and a rotor arranged between the inner stator and the outer stator. The inner stator consists of an inner stator magnet core provided with a notch along the circumference direction and an armature winding arranged inside the notch; the outer stator consists of an annular stator magnet core and a permanent magnet with an N pole and an S pole, which is alternately arrayed and fixed on the inner surface of the annular stator magnet core; and the rotor consists of a magnetic conductor and a non-magnetic conductor which are alternately arrayed. Through the modulation function of the rotor, an armature magnetic field enables the rotary speed of an air gap field at the side of the inner stator and an air gap field at the side of the permanent magnet to generate a speed ratio, thereby the speed reduction of the magnetic field is realized; in addition, under the action of rotating the magnetic field at different speeds at the side of the inner stator and the side of the permanent magnet, the purposes of obvious speed reduction as well as low speed and large torque are realized. The utility model simplifies the structure of a power-driven system and has reliable work and rapid response.
Description
Technical field
The utility model relates to permanent-magnet brushless DC electric machine, and especially the magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine belongs to the motor manufacturing technology field.
Background technology
Motor is a requisite pith in the drive system, and the motor of superior performance can make whole drive system that more wide application prospect is arranged.Conventional motors is all rotated at a relatively high speed, is difficult to satisfy the needs of various industrial equipments operations, and a large amount of mechanical loads require to run on low speed high torque, thus motor must with the supporting use of huge reducing gear.Power-driven system generally is by motor driving machinery speed change parts, and mechanical gearbox is more common mechanical speed change parts.After motor uses gear drive, not only make system dimension increase, weight increase, and cause noise height, moment of inertia to reach various unfavorable factors such as efficient is low greatly.Simultaneously because the restriction of the accuracy of gear, gear drive often influences the performance of system, thereby the direct drive system of low speed high torque is at new forms of energy, and there is urgent need in fields such as motor vehicle.The direct drive system of low speed high torque is energy savings both, can reduce the cost again, and wide application prospect is arranged.In recent years, development along with power electronic technology, permanent magnetic material and Control Technique of Microcomputer, permanent-magnet brushless DC electric machine is developed rapidly, permanent-magnet brushless DC electric machine has efficiently, the characteristics of high power density, high reliability, along with the appearance of high performance permanent magnetic materials, improved the power density and the performance of permanent-magnet brushless DC electric machine greatly.The main purpose that electric power directly drives is exactly in order to eliminate owing to shortcomings such as the noise that uses mechanical gearbox to cause, vibrations, wearing and tearing.Magnetic drives is exactly the novel kind of drive that grows up for the shortcoming of eliminating mechanical gearbox; compare with the traditional mechanical drive disk assembly; magnetic drives has a lot of potential advantages: noncontact transmission, no frictional dissipation, low vibration, low noise, do not need to lubricate, torque transmission capacity, intrinsic overload protection ability, non-maintaining, no greasy dirt, highly reliable accurately, or the like.Along with the appearance of high performance permanent magnetic materials, the torque density of magnetic drives is improved simultaneously, and recently, a kind of proposition of novel permanent magnetic gear structure has improved breakdown torque and efficient that permanent magnet gear can transmit greatly.Unite driving when this permanent magnet gear and non-brush permanent-magnet DC motor, the torque of whole system and torque density have obtained tangible lifting, but belong to the secondary transmission, and system responses is slower, and structure is also comparatively complicated.
Summary of the invention
The purpose of this utility model is to propose a kind of magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine, makes motor realize that directly magnetic field speed reduction is to reach low speed high torque.
Magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine of the present utility model, comprise internal stator, external stator and the rotor between interior external stator, internal stator is by the internal stator iron core of along the circumferential direction slotting and place the armature winding in the groove to constitute, external stator is by the ring-type stator core and be fixed on the N utmost point, the S utmost point permanent magnet that ring-type stator core inner surface alternately arranges and constitute, and rotor is made up of alternately magnetic conductor and non-magnetizer.
In the permanent-magnet brushless DC electric machine of the present utility model, the groove of said internal stator iron core can be the groove of remaining silent, open slot or semi-open slot.Said armature winding can be for concentrating winding, three phase windings that fractional slot winding or distributed winding constitute.Said magnetic conductor is to be formed by silicon steel plate packing, and non-magnetizer is plastics, aluminium or pottery.
The number n of magnetic conductor and the number 2p of permanent magnet on the armature winding number of pole-pairs p of permanent-magnet brushless DC electric machine of the present utility model, the rotor
r, satisfy formula: p
r=n-p.
During work, three phase windings are linked to each other with control Driver Circuit, control Driver Circuit is received DC power supply.Utilize rotor-position sensor detection rotor position, determine the conducting state of three phase windings thus, because it is the three-phase voltage of f that DC power supply is given three phase winding loading frequencies by control Driver Circuit, then in three phase windings, flow through the three-phase current that frequency is all f, so internal stator side air-gap field produces speed n
sThe rotating magnetic field of=60f/p (p is the armature winding number of pole-pairs), because the modulating action of rotor, it is p that internal stator side air-gap rotating magnetic field is modulated to number of pole-pairs
r=(n-p) (n is the magnetic conductor number), speed n
r=-n
sThe rotating magnetic field of p/pr, therefore by the modulating action of rotor, make the rotary speed of internal stator side air-gap field and permanent magnetism side air-gap field produce rotating ratio, thereby realize the deceleration in magnetic field, under the effect of internal stator side and permanent magnetism side friction speed rotating magnetic field, making rotor is n with speed
sThe p/n rotation reaches tangible reduction of speed, realizes the purpose of low speed high torque.
Be added to voltage swing and frequency on the armature winding by control, scalable rotating speed of motor then is fit to the needs of different occasions.
The beneficial effects of the utility model are:
1. combine the advantage of permanent-magnet brushless DC electric machine and permanent magnet gear, obviously reduced rotating speed of motor, and improved the output torque.
2. remove mechanical gearbox, simplified the structure of power-driven system, improved reliability.
3. can adopt conventional permanent magnet brushless control of DC method, control flexible, various.
Description of drawings
Fig. 1 is the structural representation of the utility model magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine.
Embodiment
With reference to Fig. 1, the magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine, comprise internal stator, external stator and the rotor between interior external stator, internal stator is by the internal stator iron core 1 of along the circumferential direction slotting and place the armature winding 2 in the groove to constitute, external stator is by ring-type stator core 5 and stick on the N utmost point, the S utmost point permanent magnet 4 that ring-type stator core 5 inner surfaces alternately arrange and constitute, and rotor 3 is made up of alternately magnetic conductor 3.1 and non-magnetizer 3.2.
In the illustrated example, armature winding 2 is that four pairs of three-phases are extremely concentrated winding, and permanent magnet 4 is 22 pairs of utmost points, and epitrochanterian magnetic conductor 3.1 and non-magnetizer 3.2 have 26 respectively, satisfy formula: p
r=n-p.
Three phase windings are connected to DC power supply by the permanent-magnet brushless DC electric machine controller.Apply certain voltage and frequency, producing frequency in armature winding is the three-phase current of f, and then the rotary speed of rotor is 60f/n.
The utility model is integrated in permanent-magnet brushless DC electric machine with the operation logic of permanent magnet gear, substituted mechanical reduction gear box, simplified the structure of power-driven system on the one hand, improved reliability, can directly adopt conventional permanent magnet brushless control of DC method on the other hand, control flexible, various, and improved the response speed of control, the most important thing is to combine the advantage of permanent-magnet brushless DC electric machine and permanent magnet gear, obviously reduce rotating speed of motor, and improved the output torque.
Claims (6)
1. magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine, it is characterized in that, comprise internal stator, external stator and the rotor between interior external stator, internal stator is by the internal stator iron core (1) of along the circumferential direction slotting and place the armature winding (2) in the groove to constitute, external stator is by ring-type stator core (5) and be fixed on the N utmost point, S utmost point permanent magnet (4) formation that ring-type stator core (5) inner surface is alternately arranged, and rotor (3) is made up of alternately magnetic conductor (3.1) and non-magnetizer (3.2).
2. magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine according to claim 1 is characterized in that the groove of said internal stator iron core (1) is the groove of remaining silent, open slot or semi-open slot.
3. magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine according to claim 1 is characterized in that said armature winding (2) is for concentrating winding, three phase windings that fractional slot winding or distributed winding constitute.
4. magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine according to claim 1 is characterized in that said magnetic conductor (3.1) is to be formed by silicon steel plate packing.
5. magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine according to claim 1 is characterized in that said non-magnetizer (3.2) is plastics, aluminium or pottery.
6. magnetic field speed reduction type low speed large torque moment permanent-magnet brushless direct current machine according to claim 1 is characterized in that said armature winding (2) number of pole-pairs p, the number n of the last magnetic conductor (3.1) of rotor (3) and the number 2p of permanent magnet (4)
r, satisfy formula: p
r=n-p.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201214366U CN201213237Y (en) | 2008-07-11 | 2008-07-11 | Magnetic field speed reducing type large torque permanent magnet brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201214366U CN201213237Y (en) | 2008-07-11 | 2008-07-11 | Magnetic field speed reducing type large torque permanent magnet brushless DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201213237Y true CN201213237Y (en) | 2009-03-25 |
Family
ID=40497415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201214366U Expired - Lifetime CN201213237Y (en) | 2008-07-11 | 2008-07-11 | Magnetic field speed reducing type large torque permanent magnet brushless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201213237Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207438A (en) * | 2015-10-15 | 2015-12-30 | 东南大学 | Magnetic field modulation type stator-rotor mixed permanent magnet memory motor |
| CN105978270A (en) * | 2016-07-08 | 2016-09-28 | 江苏大学 | Stator partition type dual salient pole permanent magnetic brushless motor |
| CN106777442A (en) * | 2015-11-20 | 2017-05-31 | 南京理工大学 | A kind of permanent-magnet brushless DC electric machine cogging torque Optimization Design |
| CN108712056A (en) * | 2018-05-29 | 2018-10-26 | 华中科技大学 | A kind of magnetic geared system improving transmission stability |
-
2008
- 2008-07-11 CN CNU2008201214366U patent/CN201213237Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207438A (en) * | 2015-10-15 | 2015-12-30 | 东南大学 | Magnetic field modulation type stator-rotor mixed permanent magnet memory motor |
| CN106777442A (en) * | 2015-11-20 | 2017-05-31 | 南京理工大学 | A kind of permanent-magnet brushless DC electric machine cogging torque Optimization Design |
| CN105978270A (en) * | 2016-07-08 | 2016-09-28 | 江苏大学 | Stator partition type dual salient pole permanent magnetic brushless motor |
| CN108712056A (en) * | 2018-05-29 | 2018-10-26 | 华中科技大学 | A kind of magnetic geared system improving transmission stability |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101404435B (en) | Magnetic field speed reduction type low speed large torque moment permanent-magnet brushless DC motor | |
| CN102104303B (en) | Disc-type low-speed large-torque composite motor based on magnetic wheel gear | |
| CN102118072B (en) | Automatic accelerating permanent-magnet direct-drive motor | |
| CN202004600U (en) | Magnetic gear based disc type composite motor with low speed and large torque | |
| CN201918876U (en) | Disc-type wheel motor | |
| CN103997174B (en) | Rotor with salient pole formula mixed excitation electric machine based on magnetic gear | |
| CN102055291A (en) | Magnetic field modulation type Halbach permanent magnetic direct drive motor | |
| CN201369658Y (en) | Variable-frequency permanent magnet synchronous motor | |
| CN109617267B (en) | Split-slot type magnetic field modulation permanent magnet motor suitable for hybrid electric vehicle | |
| CN101951047A (en) | Disk permanent magnet composite brushless motor | |
| CN201213237Y (en) | Magnetic field speed reducing type large torque permanent magnet brushless DC motor | |
| CN102324820A (en) | Magnetic field modulated multi-power port permanent magnetic motor | |
| KR20140008524A (en) | Drive system for a land craft | |
| CN103904846B (en) | A kind of Hybrid Vehicle stator permanent magnetic type double-rotor machine structure | |
| CN201956763U (en) | Permanent magnet direct drive motor | |
| CN202405976U (en) | Permanent-magnet direct-drive vernier motor | |
| CN101976905B (en) | Direct-drive composite permanent magnet motor | |
| CN106451965A (en) | Parallel double-stator permanent magnet motor | |
| CN201956858U (en) | Magnetic field modulating type Halbach permanent magnet direct drive motor | |
| CN103618392B (en) | Stator and rotor dual-permanent-magnet excitation harmonic motor | |
| CN105305669A (en) | Rotor electric excitation vernier magnetic resistance motor | |
| CN102545514A (en) | Permanent magnet direct-driven vernier motor | |
| CN210405045U (en) | Axial parallel composite motor | |
| CN101771309B (en) | Low-speed high-torque direct driving composite motor based on magnetic gear | |
| CN202172350U (en) | Magnetic field modulation type multi-power port permanent magnet motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090325 Effective date of abandoning: 20080711 |