CN201122867Y - High speed magnetic suspension non-bearing permanent magnet motor - Google Patents
High speed magnetic suspension non-bearing permanent magnet motor Download PDFInfo
- Publication number
- CN201122867Y CN201122867Y CNU2007200164990U CN200720016499U CN201122867Y CN 201122867 Y CN201122867 Y CN 201122867Y CN U2007200164990 U CNU2007200164990 U CN U2007200164990U CN 200720016499 U CN200720016499 U CN 200720016499U CN 201122867 Y CN201122867 Y CN 201122867Y
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Abstract
The utility model relates to a high speed magnetic suspension bearing-less permanent-magnet motor. The high speed magnetic suspension bearing-less permanent-magnet machine comprises a casing, a stator core, a stator winding, a permanent-magnet rotor, a rotating axle, left and right end cover and left and right spare bearing. The stator core is divided into left and right segment, and a groove used for arranging the stator winding is provided at the inner or outer side in the radial direction. The stator winding is composed of a set of 2-pole torque windings used for generating electromagnet torque and two sets of 4-pole suspension force windings used for generating rotor suspension force. The permanent-magnet rotor is composed of a permanent-magnet body with radial magnetizing integral structure, a high intensity magnetic conductive protective jacket and a fastening piece, and the spare bearings are used for supporting the rotor during the running of the high speed motor without electricity. The high speed magnetic suspension bearing-less permanent-magnet motor adopts the integration of the magnetic suspension bearing and the permanent-magnet motor, to ensure that the stator and rotor of the motor not only can generate the electromagnet torque driving the rotation of the motor, but also can generate the magnetic suspension force supporting the weight of the rotor, thereby the structure of the motor is simplified, the axial length of the motor is shortened, the rigidity and the critical speed of the high speed motor rotor are increased, and the running stability is increased.
Description
Technical field
The utility model belongs to a kind of motor, particularly a kind of high speed magnetic suspension permanent magnet motor without bearing.This motor has adopted the rotor with integrally-built permanent magnet and magnetic conductivity sheath, and stator has 2 utmost point torque windings and 4 utmost point suspending power windings, and the suspending power that rotor relies on motor itself to produce supports, and does not need bearing, is especially suitable for use as high-speed electric expreess locomotive and uses.
Background technology
High-speed electric expreess locomotive is owing to the rotating speed height, and power density is big, and its physical dimension is much smaller than the middle slowspeed machine of output equal-wattage, economical with materials effectively; Directly link to each other with prime mover or load, saved mechanical variable speed device, thereby can reduce noise and improve transmission system efficiency.The application of high-speed electric expreess locomotive more and more is extensive, as machining tools such as high speed grinding machines, the high speed flywheel energy-storage system, natural gas transport and sewage disposal high speed centrifugal compressor and air blast, and miniature gas turbine drives high-speed engine distributed power supply system etc.
Because magneto has that power is can density big, efficient is high and advantage such as brushless, become the first-selected structure of high-speed electric expreess locomotive.Yet; the high-speed electric expreess locomotive rotating speed changes up to the tens thousand of commentaries on classics of per minute even tens0000; peripheral speed can reach more than the 200m/s, and permanent magnet is difficult to bear the huge tension stress that high speed rotating centrifugal force produces, and generally needs to adopt the sheath protection permanent magnet of non-magnetic conduction high-strength alloy made.Simultaneously, traditional mechanical bearing is used for high-speed electric expreess locomotive and will be worn very soon, needs to adopt on-mechanical contact bearing.Magnetic suspension bearing is suitable for high-speed electric expreess locomotive, but its similar is in a motor, magnetic suspension bearing is installed at the high-speed electric expreess locomotive two ends, complex structure not only, and the axial length of motor is greatly increased, thereby reduced the rigidity and the critical whirling speed of rotor, be unfavorable for the stable operation of high-speed electric expreess locomotive.
The utility model content
The utility model is the special construction at high-speed permanent magnet motor, has proposed a kind of high speed permanent-magnetic electric machine with bearing design that magnetic suspension bearing and magneto are integrated in one.
The high speed magnetic suspension permanent magnet motor without bearing that the utility model proposes is a kind of synchronous machine, by casing, stator core, stator winding, p-m rotor, rotating shaft, about 2 end caps and 2 replacement bearings form.About stator core is divided into two sections, all be overrided to form by the low-loss electrical sheet, unshakable in one's determination radially in the outside have the groove of placing stator winding.Stator winding has three covers, and a cover is 2 utmost point torque windings in order to the generation electromagnetic torque, and other two covers are in order to produce 4 utmost point suspending power windings of rotor suspending power.P-m rotor is made up of the integrally-built permanent magnet of radial magnetizing, high strength permeability alloys steel sheath and securing member, replacement bearing is the Mechanical Contact formula bearing with inner and outer ring and ball, support rotor when not switching on operation in order to high-speed electric expreess locomotive prevents that rotor outer surface from directly contacting with stator inner surface.
Annexation between each parts of the utility model high speed magnetic suspension permanent magnet motor without bearing is: place the stator core that is overrided to form by low damage electrical sheet respectively at the left and right sides of casing two-end part, the two iron leg hearts have the position of same structure and groove and aim at vertically.2 utmost point torque winding inner coil limits of loop configuration are passed from left end stator core inner side slot, penetrate right-hand member inner side slot unshakable in one's determination then, and after be arranged in the upper coil limit of stator core outer side slot and return.The lower floor limit of two 4 utmost point suspending power windings of loop configuration, about being placed on respectively in two sections stator core inner side slots, and the limit, upper strata be placed on respectively about in two sections stator core outer side slots.Two ends at the casing internal stator iron core are placed left end cap and right end cap respectively; in order to two replacement bearings about fixing; between the interior ring of two replacement bearings and the rotor left and right sides securing member certain clearance is arranged; when rotor is in suspended state; ring does not rotate with rotor in the replacement bearing; have only when motor when rotors is not in suspended state; ring just contacts and bear rotor weight with rotor left and right sides securing member in the replacement bearing; lay the annular permanent-magnet body of overall structure radial magnetizing at the middle part of machine shaft; the high strength permeability alloys steel bushing in order to the protection permanent magnet is laid in the permanent magnet outside; adopt interference fit between permanent magnet and the retaining ring; make retaining ring produce needed precompression to permanent magnet, the two ends of permanent magnet adopt the non-permeability alloys steel fastening of high strength with permanent magnet respectively; retaining ring and rotating shaft connect as one.One end of rotating shaft is used to connect prime mover or mechanical load.
The beneficial effects of the utility model are:
1, high-speed electric expreess locomotive generally adopts oil bearing, air bearing and magnetic suspension bearing.Oil bearing and air bearing are by oil-filled or air between the rotor of bearing, and in order to support motor rotor-support-foundation system weight, not only bearing loss is bigger, and bearing capacity is difficult to control, and really realize noncontact and bearing capacity controlled be magnetic suspension bearing.Yet the similar of magnetic suspension bearing is installed magnetic suspension bearing in a motor at the high-speed electric expreess locomotive two ends, complex structure not only, and the axial length of motor is greatly increased, thus reduced the rigidity and the critical whirling speed of rotor, be unfavorable for the stable operation of high-speed electric expreess locomotive.The utility model is that magnetic suspension bearing and magneto are integrated in one, make the rotor of motor can produce the electromagnetic torque of drive motors rotation, can produce the magnetic suspension force of support rotor weight again, not only simplified the structure of high-speed electric expreess locomotive, and the motor axial dimension is shortened owing to saved magnetic bearing, thereby increased the rigidity and the critical whirling speed of high speed rotor of motor system, improved its operation stability.
2, high-speed permanent magnet motor adopts the non-magnetic conduction sleeve protection of high strength permanent magnet usually; yet; because the permeability of sheath and permanent magnet is very little, the magnetic field that stator suspending power winding current is produced is difficult to enter rotor, so the less weight that is difficult to the support motor rotor-support-foundation system of suspending power that produces.The utility model has adopted the high-strength alloy steel sheath with magnetic conductivity, the magnetic field that produces for stator suspending power winding current provides path, can produce enough strong suspending power support rotor, solve permanent-magnet rotor motor and be difficult to realize the maglev key problem in technology of rotor.
3, bearing-free motor is generally chosen the stator torque winding of (2p+2) utmost point and the suspending power winding of the 2p utmost point, and modal is 4 utmost point torque windings and 2 utmost point suspending power windings.Characteristics according to high-speed permanent magnet motor, the utility model adopts 2 utmost point torque windings and 4 utmost point suspending power windings, reduce the stator winding power frequency on the one hand and reduced the loss of electric machine, on the other hand, make and adopt integrally-built p-m rotor to become possibility, simplified p-m rotor manufacturing process and the operational reliability that has improved motor.
4, consider that high speed rotor of motor is thin and grow, must carry out radial suspension force control respectively, for this reason, about stator core is divided into two sections, adopt two suspending power windings respectively suspending power to be carried out at two ends, the rotor left and right sides and control at the axial two ends of motor.And motor torque has adopted the unified control of single torque winding.Processing and manufacturing is convenient in the not segmentation of rotor of motor.The middle clearance spaces of two sections stator cores, the end that is used to place two suspending power windings is used for cooling air channel on the other hand on the one hand, solves the relatively poor overheated problem easily of the long middle part of high-speed permanent magnetic rotor axial cooling condition.
5, the utility model has adopted at motor left and right sides end cap and has installed replacement bearing, between ring and the rotor securing member certain clearance is arranged in it, when rotor is in suspended state, ring does not rotate with rotor in the replacement bearing, have only when motor when rotors is not in suspended state, ring just contacts and bear rotor weight with rotor left and right sides securing member in the replacement bearing, allows rotor to slowly run, and is convenient to the Installation and Debugging of high-speed electric expreess locomotive.
Description of drawings
Fig. 1 does not have the bearing shaft of high-speed permanent magnet motor to generalized section for the utility model;
Fig. 2 does not have bearing high-speed permanent magnet motor radial section schematic diagram for the utility model;
Fig. 3 is the utility model stator 2 utmost point torque windings and 4 utmost point suspending power winding space distributed architecture schematic diagrames;
Fig. 4 is for producing x direction suspending power principle schematic by the suspending power winding current;
Fig. 5 is for producing y direction suspending power principle schematic by the suspending power winding current.
Among the figure: 1-casing, 2-left side stator core, the stator core of 3-right side, 4-torque winding, limit, 4a-torque winding upper strata, 4b-torque winding lower floor limit, 5-left side suspending power winding, 5a, limit, 6a-suspending power winding upper strata, 5b, 6b-suspending power winding lower floor limit, 6-right side suspending power winding, the 7-left end cap, the 8-right end cap, 9-left side replacement bearing, 10-right side replacement bearing, the 11-permanent magnet, 12-magnetic conduction sheath, 13-permanent magnet left end securing member, 14-permanent magnet right-hand member securing member, the 15-rotating shaft, on behalf of air-gap field, 16-reduce, and 17-represents the permanent magnet magnetic field direction, and on behalf of air-gap field, 18-increase.
Embodiment
Below in conjunction with accompanying drawing the utility model motor is described further.
Fig. 1 does not have the bearing shaft of high-speed permanent magnet motor to generalized section for the utility model, and Fig. 2 does not have bearing high-speed permanent magnet motor radial section schematic diagram for the utility model.Wherein 1 is motor case, in order to the stator core and the left and right sides end cap of fixed electrical machinery; 2 is the left side stator core; 3 is the right side stator core; 4 is 2 polar ring shape winding construction torque windings in order to the generation electromagnetic torque, and its lower floor limit and limit, upper strata are placed on respectively in the groove in the outside in the stator core radially; 5 is 4 polar ring shape structures left sides suspending power winding, in order to producing rotor left side suspending power, its lower floor and upper coil limit be placed on respectively left side stator core 2 radially in the groove in the outside; 6 is 4 polar ring shape structure right side suspending power windings, in order to producing rotor by lateral suspension power, its lower floor and upper coil limit be placed on respectively right side stator core 3 radially in the groove in the outside; 7 is left end cap, in order to fixing left side replacement bearing; 8 is right end cap, in order to fixing right side replacement bearing; 9 is the left side replacement bearing; 10 is the right side replacement bearing; 11 for being integrally-built permanent magnet; 12 is magnetic conduction high-strength alloy steel sheath, in order to the protection permanent magnet; 13 and 14 is in order to be connected the securing member of permanent magnet, sheath and rotating shaft, to be made by non-magnetic conduction high strength alloy steel; 15 is the rotating shaft of high-speed electric expreess locomotive.
When high-speed permanent magnet motor is made generator operation, the rotating shaft right-hand member is connected with driving device by shaft joint, be driven the rotating magnetic field that p-m rotor that machinery drags high speed rotating produces, in stator winding, produce electromotive force, by the torque winding to external circuit output AC electric energy.When magneto moves as motor, drive the p-m rotor high speed rotating by variable frequency alternating current power source to stator torque winding power supply, by with the connector belt dynamic load mechanical rotation of rotating shaft right-hand member.
The suspending power winding has different numbers of poles with the torque winding, their spatial distribution structural representations in stator core as shown in Figure 3, the suspending power winding is in order to produce the magnetic suspension force of support motor rotor.As shown in Figure 4, by pass to electric current as shown in the figure to 4 grades of suspending power windings, the magnetic field that magnetic field that the suspending power winding current produces and rotor permanent magnet produce is superimposed, the left side air-gap field weakens and the enhancing of right side air-gap field between electric machine rotor, square being directly proportional of electromagnetic attraction and air gap flux density between the rotor will be so rotor will be subjected among the figure electromagnetic force F of horizontal direction (x direction of principal axis) from left to right
xIn like manner can produce the electromagnetic force F of vertical direction (y direction of principal axis)
y, as shown in Figure 5.As long as detect in real time the position of high speed rotor of motor, just can adjust the direction of rotor displacement as required, the electric current by control suspending power winding produces desired suspending power, makes rotor be in suspended state all the time and air gap between the rotor is even.Between ring and the rotor securing member certain clearance is arranged in the replacement bearing of motor, when rotor is in suspended state, ring is not with rotor rotation in the replacement bearing, have only when motor when rotors is not in suspended state, ring just contacts and bear rotor weight with the rotor securing member in the replacement bearing, contacts with the direct of stator core inner surface to prevent the rotor surface.
Claims (6)
1, a kind of high speed magnetic suspension permanent magnet motor without bearing, comprise casing, stator core, stator winding, p-m rotor, rotating shaft, about two end caps and two replacement bearings, it is characterized in that stator core be divided into about two sections, the radially interior outside unshakable in one's determination has the groove of placing stator winding, p-m rotor is by permanent magnet, high strength permeability alloys steel sheath and securing member are formed, two-end part is placed stator core respectively in the left and right sides of casing, the two iron leg hearts have the position of same structure and groove and aim at vertically, 2 polar moment winding inner coil limits of loop configuration are passed from left end stator core inner side slot, penetrate right-hand member inner side slot unshakable in one's determination then, return through the upper coil limit that is arranged in the stator core outer side slot, the lower floor limit of 4 utmost point suspending power windings of loop configuration, about being placed on respectively in two sections stator core inner side slots, and the limit, upper strata be placed on respectively about in two sections stator core outer side slots, two ends at the casing internal stator iron core are placed left end cap and right end cap respectively, on a left side, a fixing respectively left side on the right end cap, right two replacement bearings, permanent magnet is laid at middle part at machine shaft, and the permanent magnet two ends adopt securing member with permanent magnet, retaining ring and rotating shaft connect as one.
2, high speed magnetic suspension permanent magnet motor without bearing as claimed in claim 1 is characterized in that described stator winding is three covers, and a cover 2 utmost point torque windings are in order to produce electromagnetic torque, and two covers, 4 utmost point suspending power windings are in order to produce the rotor suspending power.
3, high speed magnetic suspension permanent magnet motor without bearing as claimed in claim 1 is characterized in that described stator core is divided into left and right two sections, all is overrided to form by the low-loss electrical sheet.
4, high speed magnetic suspension permanent magnet motor without bearing as claimed in claim 1, it is characterized in that described replacement bearing is the bearing with inner and outer ring and roll structure, support rotor when not switching on operation in order to high-speed electric expreess locomotive prevents that rotor outer surface from directly contacting with stator inner surface.
5, high speed magnetic suspension permanent magnet motor without bearing as claimed in claim 4 is characterized in that between the interior ring of described two replacement bearings and the rotor left and right sides securing member gapped.
6, high speed magnetic suspension permanent magnet motor without bearing as claimed in claim 1; the permanent magnet that it is characterized in that described p-m rotor is the annular permanent-magnet body of overall structure radial magnetizing; retaining ring is the high strength permeability alloys steel bushing of laying in the permanent magnet outside in order to the protection permanent magnet, adopts interference fit between permanent magnet and the retaining ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200164990U CN201122867Y (en) | 2007-12-07 | 2007-12-07 | High speed magnetic suspension non-bearing permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200164990U CN201122867Y (en) | 2007-12-07 | 2007-12-07 | High speed magnetic suspension non-bearing permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201122867Y true CN201122867Y (en) | 2008-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200164990U Expired - Fee Related CN201122867Y (en) | 2007-12-07 | 2007-12-07 | High speed magnetic suspension non-bearing permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201122867Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409932A (en) * | 2013-08-28 | 2013-11-27 | 宁波慈星股份有限公司 | Bearing-free main motor of flat knitting machine |
| CN104682771A (en) * | 2015-02-15 | 2015-06-03 | 北京航天控制仪器研究所 | Magnetic suspension element for gyroscope inertial instrument output shaft centering device |
| CN104158327B (en) * | 2014-08-27 | 2016-06-08 | 南京磁谷科技有限公司 | A kind of pure iron mortice lock is tightly fixed on the structure on rotor and the method that is locked |
| CN107769621A (en) * | 2017-11-28 | 2018-03-06 | 湖北科技学院 | A kind of magnetic suspension motor |
| CN109217507A (en) * | 2017-07-04 | 2019-01-15 | 莱维特朗尼克斯有限责任公司 | It being capable of maglev rotor and the rotary machine with this rotor |
-
2007
- 2007-12-07 CN CNU2007200164990U patent/CN201122867Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409932A (en) * | 2013-08-28 | 2013-11-27 | 宁波慈星股份有限公司 | Bearing-free main motor of flat knitting machine |
| CN104158327B (en) * | 2014-08-27 | 2016-06-08 | 南京磁谷科技有限公司 | A kind of pure iron mortice lock is tightly fixed on the structure on rotor and the method that is locked |
| CN104682771A (en) * | 2015-02-15 | 2015-06-03 | 北京航天控制仪器研究所 | Magnetic suspension element for gyroscope inertial instrument output shaft centering device |
| CN109217507A (en) * | 2017-07-04 | 2019-01-15 | 莱维特朗尼克斯有限责任公司 | It being capable of maglev rotor and the rotary machine with this rotor |
| CN107769621A (en) * | 2017-11-28 | 2018-03-06 | 湖北科技学院 | A kind of magnetic suspension motor |
| CN107769621B (en) * | 2017-11-28 | 2023-12-15 | 湖北科技学院 | Magnetic suspension motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |