CN206878666U - Low-speed direct driving Self-starting permanent magnet motor - Google Patents

Low-speed direct driving Self-starting permanent magnet motor Download PDF

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Publication number
CN206878666U
CN206878666U CN201720493296.4U CN201720493296U CN206878666U CN 206878666 U CN206878666 U CN 206878666U CN 201720493296 U CN201720493296 U CN 201720493296U CN 206878666 U CN206878666 U CN 206878666U
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permanent magnet
low
direct driving
magnetic
speed direct
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吴凡
刘福刚
张华�
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Nanjing Hegong Power Technology Co., Ltd.
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吴凡
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Abstract

It the utility model is related to motor component field, and in particular to low-speed direct driving Self-starting permanent magnet motor.What the utility model was achieved by the following technical programs:Low-speed direct driving Self-starting permanent magnet motor, include stator and rotor, the rotor includes rotating shaft, starts cage bar and the rotor core being located in the rotating shaft, outside of the rotor core away from the rotating shaft core is provided with multiple holding tanks, permanent magnet is provided with each holding tank, the permanent magnet in each holding tank is a magnetic pole, and all magnetic poles are spaced identical, and the level of the adjacent magnetic pole is on the contrary, the permanent magnet is connected with every magnetic part.The purpose of this utility model is to provide low-speed direct driving Self-starting permanent magnet motor, when matching the industrial requirement of middle and slow speed of revolution output, without using reductor or variable frequency drives, and has the good stability of a system.

Description

Low-speed direct driving Self-starting permanent magnet motor
Technical field
The present invention relates to motor component field, and in particular to low-speed direct driving Self-starting permanent magnet motor.
Background technology
Motor is industrial common driving equipment, can convert electrical current into mechanical energy.Motor includes stator and turned Son, the rotation for realizing rotor relative stator is brought by the change in magnetic field and electric current, rotor includes rotating shaft, and the rotation of rotating shaft is Power output.
Different according to realization principle, the species and model of motor are also classified into multiclass, such as can be divided into direct current generator and exchange Motor, the variable rotated according to changes of magnetic field and rotor can be divided into synchronous motor and asynchronous machine, and according to the rotating speed of motor and Strategy, it can also be divided into high-speed electric expreess locomotive, middle speed motor and slowspeed machine.
In commercial Application, the power output of middle low speed is many times needed, if rotating speed is in 187.5-500 revs/min Low speed, in the prior art, the processing for middle low speed mainly have following three kinds of schemes.
Scheme one, the mode that reductor is matched using the common asynchronous moter of routine are realized.
But there are two defects in such scheme, on the one hand, reductor can increase trouble point, possible oil leak, but also Have cumbersome later stage intermittent oiling maintenance.If reductor can reduce service life, system noise without periodic maintenance Also can be larger.So conventional asynchronous motor acceleration and deceleration machine system can not only increase cost and can also increase system noise, and subsequently Maintenance cost, it is also possible to there is oil leak situation.
On the other hand, asynchronous machine acceleration and deceleration chance make it that whole system is less efficient;Asynchronous machine efficiency relatively phase itself Same specification magneto is low, and reductor also has efficiency in itself.Such as Y2 45kW asynchronous machines efficiency 92.5%, 1:10 subtract Fast machine efficiency 93% in the case of undercapacity or lubrication are not charged, then whole system efficiency is only 92.5% × 93%= 85.03%。
Scheme two, the adjustment of speed output is realized using converter technique.Using variable frequency drives plus frequency conversion permanent magnet motor. The defects of this scheme is that input cost is too high, and the variable frequency drives for adding vector control algorithm are needed for magneto, are compared Asynchronous machine acceleration and deceleration machine scheme efficiency has improvement, but frequency converter also has conversion efficiency in itself.Frequency-variable controller may need Motor increases position sensor, for monitoring rotor position angle in real time.
Scheme three, using self-running ferrite permanent-magnet motor.
Such scheme equally exists the defects of certain.First, ferrite is compared to rare earth permanent-magnetic material magnetic energy product very It is low, only 1/10.Secondly, ferrite is cheaper than rare earth in itself, but for equal-wattage rotating speed motor, rare-earth permanent-magnet electric machine ratio Ferrite volume is much smaller.Production and processing and cost of transportation increase, although ferrite in itself cheap corresponding silicon steel sheet and Enamel-covered wire and structural member cost are substantially increased cost and differ and be no different, but motor volume weight is big, systems bulky.Again, Ferrite compares rare earth, and it is much larger that remanent magnetism varies with temperature rate.Iron oxygen remanent magnetism temperature coefficient -0.2%/DEG C 0-100 DEG C;Neodymium iron Boron -0.11%/DEG C;Aluminium nickel cobalt -0.02%/DEG C.Residual magnetism temperature coefficient influences the counter electromotive force of magneto, counter electromotive force fluctuation meeting Current of electric and efficiency fluctuation are brought, influences the stability of a system.Finally, ferrite motor is, it is necessary to the bigger space of rotor hollow out Ferrite is loaded, rotor stress intensity difference, although little for slow-speed of revolution direct driving motor power, moment of torsion is conventional 5-8 Times.
The content of the invention
It is an object of the invention to provide low-speed direct driving Self-starting permanent magnet motor, in the industrial requirement of matching middle and slow speed of revolution output When, without using reductor or variable frequency drives, and there is the good stability of a system.
The present invention above-mentioned technical purpose technical scheme is that:Low-speed direct driving self-starting permanent magnet electricity Machine, comprising stator and rotor, the rotor includes rotating shaft, starts cage bar and the rotor core being located in the rotating shaft, described turn Outside of the sub- iron core away from the rotating shaft core is provided with multiple holding tanks, is provided with permanent magnet in each holding tank, each Permanent magnet in the holding tank is a magnetic pole, and all magnetic poles are spaced identical, and the level of the adjacent magnetic pole On the contrary, the permanent magnet is connected with every magnetic part.
As a preference of the present invention, the starting cage bar is multiple, it is uniformly distributed, and quantity is the whole of the number of magnetic poles Several times.
As a preference of the present invention, the holding tank is yi word pattern, bearing of trend by the axle center of the rotating shaft, it is described forever Magnet is located in the holding tank of yi word pattern.
Every magnetic part it is magnetic bridge as a preference of the present invention, described, the magnetic bridge is vertical with the permanent magnet, and described The tangential direction of rotating shaft is parallel, and the conflict link position of the permanent magnet and the magnetic bridge is located at the middle part of the magnetic bridge.
As a preference of the present invention, the holding tank is V-shape, two blocks of permanent magnetism are provided with each holding tank Body, it is arranged in into V-shape in holding tank.
As a preference of the present invention, it is described every magnetic part be air every magnetic part, comprising positioned at two pieces of permanent magnets away from institute State two outer magnet isolation tanks of rotating shaft one end and an interior magnet isolation tank positioned at two pieces of permanent magnets close to described rotating shaft one end.
As a preference of the present invention, described every being provided with cast aluminium sliver in magnetic part, the cast aluminium sliver and the starting cage Bar collectively forms rotor cage.
As a preference of the present invention, also comprising the support base that contact with ground, the support base by close ground direction according to Secondary to include heat dissipating layer, cushion, articulamentum, supporting layer and base, the cushion is included into the double thermo mechanical frame of X-shape and position In the bilevel first-level buffer block of the double thermo mechanical frame, the first-level buffer block offers the deformation extended in the horizontal direction Hole.
As a preference of the present invention, the heat dissipating layer offers multiple heat dissipation channels in vertical direction extension, it is described to dissipate The bore of the upper shed of the passage of heat is more than the bore of under shed.
As a preference of the present invention, multiple passages in vertical direction extension, the support are offered on the articulamentum Layer includes air bag and the support column positioned at the air bag periphery.
In summary, the present invention has the advantages that:
1. use permanent magnet, the characteristics of keeping magneto efficiency high.
2. realizing that middle and slow speed of revolution is run by self structure, without high frequency conversion equipment and reductor, cost is saved.
3rd, by setting every magnetic part, permanent magnet is formed and buffered, optimizes magnetic circuit, avoids the phenomenon of permanent magnet loss of excitation.
4th, radial load can be provided for rotor every magnetic part, improves the mechanical strength of motor.
Brief description of the drawings:
Fig. 1 is the schematic diagram of rotor in embodiment 1;
Fig. 2 is the schematic diagram of rotor in embodiment 2.
Fig. 3 is the side sectional view of support base.
In figure:
1st, rotor core, 2, start cage bar, 3, every magnetic part, 4, permanent magnet, 5, rotating shaft, 6, support base, 61, heat dissipating layer, 611st, heat dissipation channel, 62, cushion, 621, first-level buffer block, 622, double thermo mechanical frame, 63, articulamentum, 631, passage, 64, Supporting layer, 641, air bag, 642, support column, 65, base.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art Member can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but as long as at this All protected in the right of invention by Patent Law.
Embodiment 1, as shown in figure 1, low-speed direct driving Self-starting permanent magnet motor, comprising stator and rotor, rotor includes rotating shaft 5th, start cage bar 2 and the rotor core 1 being located in rotating shaft 5, outside of the rotor core 1 away from the axle center of rotating shaft 5 are provided with multiple receivings Groove, is provided with permanent magnet 4 in each holding tank, and the permanent magnet 4 in each holding tank is a magnetic pole, and all magnetic poles are spaced It is identical, and the level of adjacent pole is on the contrary, permanent magnet 4 is connected with every magnetic part 3.
Wherein, the structure of stator is same as the prior art, is passed through after alternating current, and stator forms the magnetic field of a rotation. The periphery that cage bar 2 is located at rotor is started, in start-up course, with rotating excitation field magnetic strength cutting, production occur for static starting cage bar 2 Raw induced-current, so as to produce electromagnetic force, acts in rotating shaft 5 and forms electromagnetic rotating, drive shaft 5 rotates, and realizes rotor Automatic start.It is multiple to start cage bar 2, is uniformly distributed, and quantity is the integral multiple of number of magnetic poles.
In this embodiment, holding tank is V-shape, and two pieces of permanent magnets 4 are provided with each holding tank, appearance is arranged in into V-shape Receive in groove.Every magnetic part 3 be air every magnetic part, comprising positioned at two pieces of permanent magnets 4 away from two outer magnet isolation tanks of the one end of rotating shaft 5 and position An interior magnet isolation tank in two pieces of permanent magnets 4 close to the one end of rotating shaft 5.Every being provided with cast aluminium sliver in magnetic part 3, cast aluminium sliver is with rising Dynamic cage bar 2 collectively forms rotor cage.
Under normal circumstances, the starting current times of self-starting permanent magnet synchronous motor are more suitable than the asynchronous machine of same power grade, Stator current and rotor current caused by sensing will produce very big demagnetization magnetic potential during starting, if V type groove structures do not take magnetic In the case that road optimizes, magnetic circuit is distorted, and is caused the demagnetization magnetic potential to act directly on the part of part permanent magnet 4, that is, is started When, electromagnetic force can be acted directly on permanent magnet 4, be unfavorable for the maintenance of equipment with stably.Part easily occurs for this meeting permanent magnet Loss of excitation, and progressively deteriorate until permanent magnet whole loss of excitation.
In the technical program, be additionally arranged outer magnetic bridge and interior magnetic bridge, inside can with cast aluminium or not cast aluminium, outside every In the presence of magnetic bridge and interior magnetic bridge, the degree that magnetic circuit distorts in starting process is effectively reduced, it is suppressed that the inner magnet of permanent magnet 4 Close change, and ensure that the phenomenon of local loss of excitation will not occur for permanent magnet 4
In addition, during rotor startup and operation, can be acted on by electromagnetic force and the load reverse with electromagnetic force Power, influence is caused on the mechanical stability of permanent magnet 4, and in the technical program, every magnetic part 3, especially interior magnet isolation tank, give Permanent magnet 4 provides the centrifugal force away from the axis direction of rotating shaft 5, enhances support, radial load is provided to rotor, there is provided The mechanical strength of whole motor.
When rotor startup terminates, and whole rotor stability rotates, the generation of electromagnetic force more comes from permanent magnet 4, rather than start cage bar 2.
Embodiment 2, as shown in Fig. 2 being permanent magnet 4 and every in the setting of magnetic part 3 with the difference of embodiment 1.
In the present embodiment, holding tank is yi word pattern, and bearing of trend is located at yi word pattern by the axle center of rotating shaft 5, permanent magnet 4 Holding tank in.Be magnetic bridge every magnetic part, magnetic bridge is vertical with permanent magnet 4, parallel with the tangential direction of rotating shaft 5, permanent magnet 4 with The conflict link position of magnetic bridge is located at the middle part of magnetic bridge.Every being provided with cast aluminium sliver in magnetic part 3, cast aluminium sliver is with starting cage Bar 2 collectively forms rotor cage.
In the present embodiment, holding tank is not V-shape, but yi word pattern.Such structure make it that space availability ratio is higher, More permanent magnets 4 can be disposed, i.e., can form more magnetic poles.In the running of rotor, the quantity of magnetic pole and rotor The quantity of rotating speed inverse correlation, i.e. magnetic pole is more, may be such that the rotary speed of rotor is lower, more adapts to the industrial requirement of the slow-speed of revolution.
It is same as Example 1, the setting of magnetic bridge, avoid magnetic circuit and be distorted that rear permanent magnet part loss of excitation is serious to be showed As reducing the loss of internal rotor, improving the efficiency of motor.Magnetic bridge not only optimizes magnetic circuit, yet forms both one with The reverse pulling force of electromagnetic force, so as to improve the mechanical strength of motor.
As shown in figure 3, the bottom of motor is provided with support base 6, antidetonation of the lifting motor in running, Jing Yin and radiating Performance.
Support base 6 is pressed includes heat dissipating layer 61, cushion 62, articulamentum 63, supporting layer 64 and bottom successively close to ground direction Seat 65, cushion 62 are included into the double thermo mechanical frame 622 of X-shape and positioned at 622 bilevel first-level buffer of double thermo mechanical frame Block 621, first-level buffer block 621 offer the deformation hole extended in the horizontal direction.
Many vibrations can be produced in motor operation, in the technical program, are filtered using two level antidetonation, and It is the mode of deformation energy-absorbing.Double thermo mechanical frame 622 positioned at middle part is in X-shape, and the design of scissors can be in vertical direction Upper carry out deformation, so as to absorb the vibration of vertical direction.First-level buffer block 621 is designed with the upper and lower ends of double thermo mechanical frame 622, Centre offers the deformation hole that insertion opens up, and absorbs vibration using the deformation of these through holes.
Heat dissipating layer 61 offers multiple heat dissipation channels 611 in vertical direction extension, the mouth of the upper shed of heat dissipation channel 611 Footpath is more than the bore of under shed.Heat dissipating layer 61 itself can be made of heat sink material, heat dissipation channel 611 it is suitable for reading big, lower mouth is small Design be due to top position closer to rotor part, heat is more, suitable for reading big to be beneficial to discharge.And if it is under setting that lower mouth is small Make a slip of the tongue big, then can influence the contact area of first-level buffer block and unload power interface.
Multiple passages 631 in vertical direction extension are offered on articulamentum 63, supporting layer 64 includes air bag 641 and is located at The support column 642 on the periphery of air bag 641.

Claims (10)

1. low-speed direct driving Self-starting permanent magnet motor, includes stator and rotor, it is characterised in that:The rotor includes rotating shaft(5), rise Dynamic cage bar(2)Be located at the rotating shaft(5)On rotor core(1), the rotor core(1)Away from the rotating shaft(5)Axle center Outside be provided with multiple holding tanks, be provided with permanent magnet in each holding tank(4), the permanent magnet in each holding tank (4)For a magnetic pole, all magnetic poles are spaced identical, and the level of the adjacent magnetic pole is on the contrary, the permanent magnet(4) It is connected with every magnetic part(3).
2. low-speed direct driving Self-starting permanent magnet motor according to claim 1, it is characterised in that:The starting cage bar(2)For It is multiple, it is uniformly distributed, and quantity is the integral multiple of the number of magnetic poles.
3. low-speed direct driving Self-starting permanent magnet motor according to claim 1, it is characterised in that:The holding tank is a word Type, bearing of trend pass through the rotating shaft(5)Axle center, the permanent magnet(4)It is located in the holding tank of yi word pattern.
4. low-speed direct driving Self-starting permanent magnet motor according to claim 3, it is characterised in that:It is described every magnetic part be every magnetic Bridge, the magnetic bridge and the permanent magnet(4)Vertically, with the rotating shaft(5)Tangential direction it is parallel, the permanent magnet(4)With The conflict link position of the magnetic bridge is located at the middle part of the magnetic bridge.
5. low-speed direct driving Self-starting permanent magnet motor according to claim 1, it is characterised in that:The holding tank is V-shape, Two pieces of permanent magnets are provided with each holding tank(4), it is arranged in into V-shape in holding tank.
6. low-speed direct driving Self-starting permanent magnet motor according to claim 5, it is characterised in that:It is described every magnetic part(3)For sky Air bound magnetic part, comprising positioned at two pieces of permanent magnets(4)Away from the rotating shaft(5)Two outer magnet isolation tanks of one end and positioned at two pieces The permanent magnet(4)Close to the rotating shaft(5)One interior magnet isolation tank of one end.
7. according to the low-speed direct driving Self-starting permanent magnet motor described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterised in that:Institute State every magnetic part(3)In cast aluminium sliver is installed, the cast aluminium sliver and the starting cage bar(2)Collectively form rotor cage.
8. according to the low-speed direct driving Self-starting permanent magnet motor described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterised in that:Also Include the support base contacted with ground(6), the support base(6)Heat dissipating layer is included successively by close to ground direction(61), buffering Layer(62), articulamentum(63), supporting layer(64)With base(65), the cushion(62)Include the double thermo mechanical frame into X-shape (622)With positioned at the double thermo mechanical frame(622)Bilevel first-level buffer block(621), the first-level buffer block(621)Open Provided with the deformation hole extended in the horizontal direction.
9. low-speed direct driving Self-starting permanent magnet motor according to claim 8, it is characterised in that:The heat dissipating layer(61)Open up There are multiple heat dissipation channels in vertical direction extension(611), the heat dissipation channel(611)The bore of upper shed be more than under shed Bore.
10. low-speed direct driving Self-starting permanent magnet motor according to claim 9, it is characterised in that:The articulamentum(63)On Offer multiple passages in vertical direction extension(631), the supporting layer(64)Include air bag(641)With positioned at the air bag (641)The support column on periphery(642).
CN201720493296.4U 2017-05-05 2017-05-05 Low-speed direct driving Self-starting permanent magnet motor Active CN206878666U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106921274A (en) * 2017-05-05 2017-07-04 吴凡 Low-speed direct driving Self-starting permanent magnet motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106921274A (en) * 2017-05-05 2017-07-04 吴凡 Low-speed direct driving Self-starting permanent magnet motor

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Effective date of registration: 20190517

Address after: 211505 Room 201, 404 Three Units, Hengsheng Park, 399 Xiongzhou South Road, Longchi Street, Liuhe District, Nanjing City, Jiangsu Province

Patentee after: Nanjing Hegong Power Technology Co., Ltd.

Address before: 230001 No. 11 Jinhu Road, Shuangfeng Industrial Park, Changfeng County, Hefei City, Anhui Province

Patentee before: Wu Fan

TR01 Transfer of patent right