CN108110928B - High-voltage ultra-high-speed permanent magnet synchronous motor - Google Patents
High-voltage ultra-high-speed permanent magnet synchronous motor Download PDFInfo
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- CN108110928B CN108110928B CN201810074885.8A CN201810074885A CN108110928B CN 108110928 B CN108110928 B CN 108110928B CN 201810074885 A CN201810074885 A CN 201810074885A CN 108110928 B CN108110928 B CN 108110928B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 36
- 238000004804 winding Methods 0.000 claims abstract description 29
- 238000004080 punching Methods 0.000 claims abstract description 24
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 15
- 239000004917 carbon fiber Substances 0.000 claims abstract description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 230000017525 heat dissipation Effects 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 67
- 239000002826 coolant Substances 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000011152 fibreglass Substances 0.000 claims description 6
- 229910021389 graphene Inorganic materials 0.000 claims description 6
- 238000003475 lamination Methods 0.000 claims description 6
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- 239000003550 marker Substances 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 239000000110 cooling liquid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/04—Balancing means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to the technical field of motors, in particular to a high-voltage and ultra-high-speed permanent magnet synchronous motor. Comprising the following steps: the rotor, the rotor composite protective sleeve, the stator core, the stator winding and the stand; the rotor comprises a rotating shaft and a plurality of pairs of permanent magnets, the pairs of permanent magnets are sequentially distributed along the circumferential direction of the rotating shaft, and any two adjacent permanent magnets are fixedly connected; the rotor composite protective sleeve comprises a carbon fiber layer and a steel wire layer; the stator core comprises a plurality of stator punching sheets, and the stator punching sheets are sequentially laminated into a whole; the stator winding is arranged as a forming winding and is arranged on the side wall of the stator core; the machine base comprises a machine base jacket. The invention solves the technical problems of poor heat dissipation effect, large eddy current loss, separated or damaged balance disc, easy vibration, high cost and large volume of the motor in the prior art.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a high-voltage and ultra-high-speed permanent magnet synchronous motor.
Background
With the development of the power industry, the motor is widely applied at home and abroad, and some loads have higher requirements on the rotating speed, however, increasing the rotating speed of the motor has higher requirements on the performance of the motor, and the performance of the existing motor is difficult to reach the higher requirements.
Firstly, compared with different motors, the high-voltage and ultra-high-speed permanent magnet synchronous motor has the advantages that the heat generation of the high-voltage and ultra-high-speed permanent magnet synchronous motor is increased, meanwhile, the stator shielding sleeve on the existing motor is made of stainless steel materials, so that the eddy current loss generated by the stator shielding sleeve is larger, and the processing equipment is more expensive; secondly, the higher the motor rotation speed is, the more heat is generated, however, the existing high-speed motor has poor heat dissipation effect, and the rotation speed of the existing high-speed motor still cannot reach the required rotation speed in consideration of the problem of motor temperature rise; moreover, the common motor rotor is usually balanced by a method of welding a balance block or turning a balance disc, the linear speed of the high-speed motor rotor can reach 800m/s at most, the strength of a welding line of the welding balance block cannot bear the centrifugal force generated by the high rotating speed, the stability of the balance disc can be damaged by turning the balance disc, the fatigue limit of the balance disc is reduced, and the balance disc is damaged; in addition, the winding stator coil end of the high-voltage ultra-high-speed permanent magnet synchronous motor is overlong, the occupied space is large, and the machine seat needs to be lengthened, so that the rigidity of the shaft is reduced, the vibration is easy, the mechanism is not compact, the copper consumption is large, and the cost is increased.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a high-voltage ultrahigh-speed permanent magnet synchronous motor, which solves the technical problems of poor motor heat dissipation effect, large eddy current loss, separated or damaged balance disc, easy vibration, high cost and large volume in the prior art.
The invention provides a high-voltage ultra-high-speed permanent magnet synchronous motor, which comprises: the rotor, the rotor composite protective sleeve, the stator core, the stator winding and the stand;
the rotor comprises a rotating shaft and a plurality of pairs of permanent magnets, the pairs of permanent magnets are sequentially distributed along the circumferential direction of the rotating shaft, and any two adjacent permanent magnets are fixedly connected; the rotor composite protective sleeve comprises a carbon fiber layer and a steel wire layer, wherein the carbon fiber layer surrounds the rotor, and the steel wire layer surrounds the carbon fiber layer;
the stator core comprises a plurality of stator punching sheets, and the stator punching sheets are sequentially laminated into a whole; the stator winding is arranged as a forming winding and is arranged on the side wall of the stator core;
the machine seat comprises a machine seat jacket, the machine seat jacket is sleeved outside the stator core, one side of the machine seat jacket is provided with a liquid inlet pipe, the liquid inlet pipe is communicated with a liquid inlet annular channel arranged in the sleeve body, and the liquid inlet annular channel is communicated with a plurality of liquid inlet openings formed in the inner side wall of the sleeve body; the inner side wall of the other side of the base jacket is provided with a plurality of liquid outlets which are respectively communicated with a liquid outlet annular channel arranged in the base jacket, the liquid outlet annular channel is communicated with a spiral channel, and the spiral channel is communicated with a liquid outlet pipe at one side of the base jacket;
the balance ring is sleeved on the rotating shaft of the rotor and comprises a balance disc and a balance plate Heng Zhu, the balance disc is sleeved on the rotating shaft of the rotor, and the balance disc is in interference fit with the rotating shaft; and a column hole matched with the balance column is formed in the balance disc.
In any of the above technical solutions, further, the stator winding includes a plurality of stator coils, and the stator coils are configured in a U-shaped structure, and can be inserted into and penetrate through a side wall of the stator core along a length direction of the stator core.
In any of the above technical solutions, the motor further comprises a stator shielding sleeve, wherein the stator shielding sleeve is made of glass fiber reinforced plastic or glass cloth; and the stator shielding sleeve is fixedly connected with the screen board.
In any of the above technical solutions, further, the stator core includes a stator punching sheet, and the stator punching sheet is a circular sheet structure with a through hole at a center; the outer edge of the stator punching sheet is provided with a plurality of outer diameter grooves with outward openings, and the outer diameter grooves are sequentially distributed along the outer edge of the stator punching sheet; a plurality of outer diameter grooves for passing a cooling medium; outer diameter teeth are formed between every two adjacent outer diameter grooves; the outer diameter teeth are provided with through holes for cooling medium to pass through; a plurality of inner diameter grooves are formed in the inner edge of the stator punching sheet; the outer diameter groove and the inner diameter groove are correspondingly arranged.
In any of the above technical solutions, further, the through-flow hole includes at least three circular holes, and two adjacent circular holes are overlapped.
In any of the above technical solutions, further, one of the outer diameter teeth is provided with a marking groove for positioning.
In any of the above technical solutions, further, stator end plates are disposed at both ends of the stator core.
In any of the above technical solutions, further, graphene heat dissipation layers are sprayed on the stator core, the rotor, the ends of the stator windings, and the balance ring.
In any of the above technical solutions, further comprising an electrical connector, the electrical connector being located on an outer wall of the housing.
In any of the above technical solutions, further comprising a driving end magnetic bearing and a tail end magnetic bearing, wherein the driving end magnetic bearing and the tail end magnetic bearing are used for supporting two ends of the rotor.
Compared with the prior art, the high-voltage and ultrahigh-speed permanent magnet synchronous motor provided by the invention has the following advantages:
the invention provides a high-voltage ultra-high-speed permanent magnet synchronous motor, which comprises a rotor, a rotor composite protective sleeve, a stator core, a stator winding and a stand; the rotor comprises a rotating shaft and a plurality of pairs of permanent magnets, the pairs of permanent magnets are sequentially distributed along the circumferential direction of the rotating shaft, and any two adjacent permanent magnets are fixedly connected; the rotor composite protective sleeve comprises a carbon fiber layer and a steel wire layer, wherein the carbon fiber layer surrounds the rotor, and the steel wire layer surrounds the carbon fiber layer; the stator core comprises a plurality of stator punching sheets, and the plurality of stator punching sheets are sequentially laminated into a whole; the stator winding comprises a plurality of groups of windings, and the windings are arranged as forming windings and are arranged on the side wall of the stator core; the machine base comprises a machine base jacket, the machine base jacket is sleeved outside the stator core, one side of the machine base jacket is provided with a liquid inlet pipe, the liquid inlet pipe is communicated with a liquid inlet annular channel arranged in the sleeve body, and the liquid inlet annular channel is communicated with a plurality of liquid inlet openings formed in the inner side wall of the sleeve body; the inner side wall of the other side of the base jacket is provided with a plurality of liquid outlets which are respectively communicated with a liquid outlet annular channel arranged in the base jacket, the liquid outlet annular channel is communicated with a spiral channel, and the spiral channel is communicated with a liquid outlet pipe at one side of the base jacket; the balance ring comprises a balance disc and a balance column, the balance disc is sleeved on the rotating shaft of the rotor, and the balance disc is in interference fit with the rotating shaft; the balance disc is provided with a column hole matched with the balance column.
The specific connection mode and the position relation of the structure are analyzed as follows: any two adjacent permanent magnets are fixedly connected with each other so as to realize position limitation, a plurality of pairs of permanent magnets are sequentially distributed along the circumferential direction of the rotating shaft, parallel magnetization can be realized, the outer surface of each permanent magnet can generate vortex with smaller area, the vortex loss generated by space harmonic components in the rotor can be effectively reduced, the problem of overlarge vortex loss is solved, the heating value is reduced, and the efficiency and the stability of the motor are improved; the steel wire layer on the rotor composite protective sleeve can conduct higher harmonics, so that the influence of the higher harmonics generated by the stator on the rotor is further relieved, the heat generated by heating of the rotor is reduced, the carbon fiber layer can protect the permanent magnet, and the heat dissipation of the rotor is facilitated.
The stator is arranged in the machine base jacket, the cooling liquid enters the liquid inlet annular channel from the liquid inlet pipe at one side of the machine base jacket, the cooling liquid enters the cavity through the liquid inlet, flows along the axial direction of the machine base jacket at the gap between the machine base jacket and the motor under the pressure effect, flows to the other side of the machine base jacket, flows out of the liquid outlet annular channel from the liquid outlet, flows into the liquid outlet pipe from the liquid outlet annular channel, and is discharged from the liquid outlet pipe. The base jacket realizes the twice cooling of the stator core sleeved in the base jacket. In the first cooling process, the liquid inlet and the liquid outlet are respectively positioned at two ends of the jacket of the machine base along the axial direction, and the liquid outlet pipe are respectively positioned at two ends of the jacket of the machine base along the axial direction, so that the two cooling processes of the stator are both effective, the stator is comprehensively cooled, the cooling area is increased, and the cooling effect of the ultra-high-speed permanent magnet synchronous motor is improved. Through the feed liquor to the coolant liquid shunts thereby realizes the comprehensive cooling to the motor along circumference direction, has further improved the cooling effect.
The rotating shaft is in interference fit with the balance disc, so that the balance disc rotates along with the rotating shaft when the rotating shaft rotates; when the rotor is unbalanced, that is, the center of gravity of the rotating shaft deviates from the axis of the rotating shaft, for example, the center of gravity of the rotating shaft deviates from the axis of the rotating shaft towards a first direction to generate vibration, the column holes (or one of the column holes) on the balance disc are arranged in a second direction (wherein the first direction is opposite to the second direction) of the axis of the rotating shaft, and the balance column is inserted into the column holes to increase the weight of the rotating shaft in the second direction and balance the deviation of the center of the rotating shaft towards the first direction, so that dynamic balance of the rotor is realized, and the problem of reduced strength of the rotor caused by welding and turning is effectively relieved.
Therefore, the high-voltage and ultra-high-speed permanent magnet synchronous motor provided by the invention has the advantages of good heat dissipation effect, small eddy current loss, higher rotor strength, low cost and small volume.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a cross-sectional view of a high-voltage ultra-high-speed permanent magnet synchronous motor provided by an embodiment of the invention;
fig. 2 is a side view of a high-voltage and ultra-high-speed permanent magnet synchronous motor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a rotor of a high-voltage and ultra-high-speed permanent magnet synchronous motor according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a balancing ring of a high-voltage and ultra-high-speed permanent magnet synchronous motor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a stator punching sheet of a high-voltage and ultra-high-speed permanent magnet synchronous motor according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a housing jacket of a high-voltage and ultra-high-speed permanent magnet synchronous motor according to an embodiment of the present invention.
Icon:
100-stand; 101-a stand jacket; 1011—liquid inlet; 1012-liquid inlet annular channel; 1013-a liquid inlet pipe; 1014-a liquid outlet pipe; 1015-helical channels; 1016-exit annular channel; 1017-a liquid outlet; 200-driving end magnetic bearings; 300-screen panel; 400-stator shielding sleeve; 500-stator core; 501-stator punching; 5011-an inner diameter groove; 5012-outer diameter groove; 5013-outer diameter teeth; 50131-via holes; 50132-marking slot; 600-stator end plates; 700-stator coils; 800-tail end magnetic bearing; 900-rotating shaft; 1000-permanent magnets; 1100-balancing ring; 1101-balancing column; 1200-electrical connector; 1300-chassis.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.
Examples
As shown in fig. 1 to 6, the high-voltage and ultra-high-speed permanent magnet synchronous motor provided in this embodiment includes: the rotor, the rotor composite protective sleeve, the stator core 500, the stator winding and the machine base 100;
the rotor comprises a rotating shaft 900 and a plurality of pairs of permanent magnets 1000, wherein the pairs of permanent magnets 1000 are sequentially arranged along the circumferential direction of the rotating shaft 900, and any two adjacent permanent magnets 1000 are fixedly connected; the rotor composite protective sleeve comprises a carbon fiber layer and a steel wire layer, wherein the carbon fiber layer surrounds the rotor, and the steel wire layer surrounds the carbon fiber layer; the rotor composite protective sleeve is arranged outside the rotor and used for protecting the rotor;
the stator core comprises a plurality of stator punching sheets 501, and the plurality of stator punching sheets 501 are sequentially laminated into a whole; the stator winding is set as a forming winding and is arranged on the side wall of the stator core; the stator winding is arranged at the back of the stator core to form a back-wound winding (i.e. the stator winding is wound around the stator core in a manner of passing through the inner diameter of the stator core and then to the outer diameter of the stator core);
the machine base 100 comprises a machine base jacket 101, the machine base jacket 101 is sleeved outside the stator core 500, one side of the machine base jacket 101 is provided with a liquid inlet pipe 1013, the liquid inlet pipe 1013 is communicated with a liquid inlet annular channel 1012 arranged in the sleeve body, and the liquid inlet annular channel 1012 is communicated with a plurality of liquid inlet ports 1011 formed in the inner side wall of the sleeve body; the inner side wall of the other side of the base jacket 101 is provided with a plurality of liquid outlets 1017, the liquid outlets 1017 are respectively communicated with a liquid outlet annular channel 1016 arranged in the base jacket 101, the liquid outlet annular channel 1016 is communicated with a spiral channel 1015, and the spiral channel 1015 is communicated with a liquid outlet pipe 1014 at one side of the base jacket 101;
the rotating shaft 900 of the rotor is sleeved with a balance ring 1100, the balance ring 1100 comprises a balance disc and a balance Heng Zhu 1101, the balance disc is sleeved on the rotating shaft 900 of the rotor, and the balance disc is in interference fit with the rotating shaft 900; the balance plate is provided with a column hole matched with the balance column 1101.
The specific connection mode and the position relation of the structure are analyzed as follows: any two adjacent permanent magnets 1000 are fixedly connected with each other so as to realize position limitation, a plurality of pairs of permanent magnets 1000 are sequentially distributed along the circumferential direction of the rotating shaft 900, parallel magnetization can be realized, the outer surface of each permanent magnet 1000 can generate vortex with smaller area, the vortex loss generated by space harmonic components in the rotor can be effectively reduced, the problem of overlarge vortex loss is relieved, the heat productivity is reduced, and the efficiency and the stability of the motor are improved; the steel wire layer on the rotor composite protective sleeve can conduct higher harmonics, so that the influence of the higher harmonics generated by the stator on the rotor is further relieved, the heat generated by heating of the rotor is reduced, the carbon fiber layer can protect the permanent magnet 1000, and the heat dissipation of the rotor is facilitated.
The stator is arranged in the machine base jacket 101, the cooling liquid enters the liquid inlet annular channel 1012 from the liquid inlet pipe 1013 positioned at one side of the machine base jacket 101, the cooling liquid enters the cavity through the liquid inlet 1011, flows along the axial direction of the machine base jacket 101 at the gap between the machine base jacket 101 and the motor under the action of pressure, flows to the other side of the machine base jacket 101, flows out of the liquid outlet annular channel 1016 from the liquid outlet 1017, flows into the liquid outlet pipe 1014 from the liquid outlet annular channel 1016, and is discharged from the liquid outlet pipe 1014. The housing jacket 101 achieves two cooling of the stator core 500 sleeved in the housing jacket 101. In the first cooling process, since the liquid inlet 1011 and the liquid outlet 1017 are respectively located at two ends of the machine base jacket 101 along the axial direction, and the liquid outlet 1017 and the liquid outlet 1014 are respectively located at two ends of the machine base jacket 101 along the axial direction, the two cooling processes of the stator are both effective, the complete cooling of the stator is realized, the cooling area is increased, and the cooling effect of the ultra-high speed permanent magnet synchronous motor is improved. Through the feed liquor to the coolant liquid shunts thereby realizes the comprehensive cooling to the motor along circumference direction, has further improved the cooling effect.
The shaft 900 is in interference fit with the balance disc, so that when the shaft 900 rotates, the balance disc rotates along with the shaft; when the rotor is unbalanced, that is, the center of gravity of the rotating shaft 900 deviates from the axis of the rotating shaft 900, for example, the center of gravity of the rotating shaft 900 deviates from the axis of the rotating shaft 900 towards a first direction to generate vibration, the column hole (or one of the column holes) on the balance disc is arranged in a second direction (wherein the first direction is opposite to the second direction) of the axis of the rotating shaft 900, and the balance column 1101 is inserted into the column hole to increase the weight of the rotating shaft 900 in the second direction and balance the deviation of the center of the rotating shaft 900 towards the first direction, thereby realizing dynamic balance of the rotor and effectively relieving the problem of reduced strength of the rotor caused by welding and turning.
Therefore, the high-voltage and ultra-high-speed permanent magnet synchronous motor provided by the invention has the advantages of good heat dissipation effect, small eddy current loss, higher rotor strength, low cost and small volume.
In this embodiment, the stator winding includes a plurality of stator coils 700, and the stator coils 700 are configured in a U-shaped structure, and can be inserted into and penetrate through the side wall of the stator core in the length direction of the stator core. The occupied space of the end part of the stator core 500 can be reduced, the axial distance of the motor can be increased, the critical rotation speed of the rotor can be increased, and the power density of the motor can be improved.
Specifically, the stator shielding sleeve 400 is also included, and the stator shielding sleeve 400 is made of glass fiber reinforced plastic or glass cloth; and the stator shield 400 is fixedly coupled with the screen 300. It should be noted that, the stator shielding sleeve 400 is pasted on the inner surface of the stator core 500, so that the stator shielding sleeve 400 and the stator core 500 are combined into a whole, the inner cavity of the stator core 500 can be effectively sealed, and meanwhile, the compression resistance of the stator shielding sleeve 400 is improved.
Further, both ends of the stator core 500 are provided with stator end plates 600.
It should be noted that, graphene heat dissipation layers are sprayed on the stator core 500, the rotor, the end portions of the stator windings and the balance ring 1100; the heat conductivity coefficient of the graphene reaches 3000-5000W/mK, is higher than that of the carbon nano tube and diamond and is several times that of copper, the graphene is sprayed on the surfaces of the stator core 500, the rotor, the end parts of the stator windings and the balance ring 1100, and the heat generated by the rotor and the stator core 500 is rapidly led out through the high heat conductivity of the graphene, so that the heat productivity of the motor is reduced, and the temperature rise of the motor is better controlled.
It should be further noted that the bottom of the stand 100 is further provided with a bottom frame 1300.
Further, the stator core 500 includes a stator lamination 501, where the stator lamination 501 is a circular sheet structure with a through hole at the center; the outer edge of the stator punching sheet 501 is provided with a plurality of outer diameter grooves 5012 with outward openings, and the plurality of outer diameter grooves 5012 are sequentially arranged along the outer edge of the stator punching sheet 501; a plurality of outer diameter grooves 5012 for passing a cooling medium; an outer diameter tooth 5013 is formed between every two adjacent outer diameter grooves 5012; the outer diameter teeth 5013 are provided with through holes 50131, and the through holes 50131 are used for the cooling medium to pass through; a plurality of inner diameter grooves 5011 are formed at the inner edge of the stator punching sheet 501; the outer diameter groove 5012 and the inner diameter groove 5011 are provided correspondingly.
Specifically, the through-flow hole 50131 includes at least three circular holes, and two adjacent circular holes are overlapped.
Further, one of the outer diameter teeth 5013 is provided with a marking slot 50132 for positioning.
The outer diameter groove 5012 and the inner diameter groove 5011 are correspondingly arranged, so that winding is facilitated. Because the stator core 500 is wrapped with the housing 100, the stator punching sheet 501 and the housing 100 form a channel at the position of the outer diameter slot 5012; since the stator core 500 is formed by laminating a plurality of stator laminations 501, a cooling medium can be injected into one end of the stator core 500 during operation of the motor, and the injected cooling medium can pass through a passage formed by the outer diameter grooves 5012 of the stator laminations 501 and the base, and finally flows out from the other end of the stator core 500. An outer diameter tooth 5013 is formed between every two adjacent outer diameter grooves 5012, and a through-flow hole 50131 is arranged on the outer diameter tooth 5013, and the through-flow hole 50131 is used for allowing a cooling medium to pass through; the stator core 500 is injected with a cooling medium, and the injected cooling medium can sequentially pass through the through-flow holes 50131 on each stator lamination 501 and then flow out; in this process, the cooling medium can more fully contact with the stator core 500, further increasing the contact area between the cooling medium and the stator core 500, so that the heat generated on the stator core 500 can be more timely carried out by the cooling medium; and further, the temperature rise of the motor can be reduced well, and the performance of the motor is improved.
Further, the above embodiment further includes an electrical connector 1200, where the electrical connector 1200 is located on the outer wall of the stand 100.
Specifically, the magnetic motor further comprises a driving end magnetic bearing 200 and a tail end magnetic bearing 800, wherein the driving end magnetic bearing 200 and the tail end magnetic bearing 800 are used for supporting two ends of the rotor; to reduce friction experienced by the rotor as it rotates.
In summary, the embodiment of the invention discloses a high-voltage and ultra-high-speed permanent magnet synchronous motor, which overcomes a plurality of technical defects of the traditional motor. The high-voltage ultrahigh-speed permanent magnet synchronous motor provided by the embodiment of the invention has the advantages of good heat dissipation effect, small eddy current loss, higher rotor strength, low cost and small volume; at the moment, the voltage of the high-voltage ultra-high-speed permanent magnet synchronous motor can reach 6 kV-10 kV, the rotating speed range is up to 6000 r/min-50000 r/min, and compared with the structure that a traditional asynchronous machine is connected with a system through a gear box in a speed-up manner and a load, the high-voltage ultra-high-speed permanent magnet synchronous motor and the load are directly connected, the middle link of the gear box is omitted, the system loss is greatly reduced, and the system efficiency is increased by about 20% compared with that of the traditional asynchronous machine.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A high voltage, ultra-high speed permanent magnet synchronous motor, comprising: the rotor, the rotor composite protective sleeve, the stator core, the stator winding and the stand;
the rotor comprises a rotating shaft and a plurality of pairs of permanent magnets, the pairs of permanent magnets are sequentially distributed along the circumferential direction of the rotating shaft, and any two adjacent permanent magnets are fixedly connected; the rotor composite protective sleeve comprises a carbon fiber layer and a steel wire layer, wherein the carbon fiber layer surrounds the rotor, and the steel wire layer surrounds the carbon fiber layer;
the stator core comprises a plurality of stator punching sheets, and the stator punching sheets are sequentially laminated into a whole; the stator winding is arranged as a forming winding and is arranged on the side wall of the stator core;
the machine seat comprises a machine seat jacket, the machine seat jacket is sleeved outside the stator core, one side of the machine seat jacket is provided with a liquid inlet pipe, the liquid inlet pipe is communicated with a liquid inlet annular channel arranged in the sleeve body, and the liquid inlet annular channel is communicated with a plurality of liquid inlet openings formed in the inner side wall of the sleeve body; the inner side wall of the other side of the base jacket is provided with a plurality of liquid outlets which are respectively communicated with a liquid outlet annular channel arranged in the base jacket, the liquid outlet annular channel is communicated with a spiral channel, and the spiral channel is communicated with a liquid outlet pipe at one side of the base jacket;
the balance ring is sleeved on the rotating shaft of the rotor and comprises a balance disc and a balance plate Heng Zhu, the balance disc is sleeved on the rotating shaft of the rotor, and the balance disc is in interference fit with the rotating shaft; and a column hole matched with the balance column is formed in the balance disc.
2. The high-voltage, ultra-high-speed permanent magnet synchronous motor according to claim 1, wherein the stator winding comprises a plurality of stator coils, the stator coils being provided in a U-shaped configuration, being insertable in a length direction of the stator core and penetrating through a side wall of the stator core.
3. The high-voltage and ultra-high-speed permanent magnet synchronous motor according to claim 1, further comprising a stator shielding sleeve, wherein the stator shielding sleeve is made of glass fiber reinforced plastic or glass cloth; and the stator shielding sleeve is fixedly connected with the screen board.
4. The high-voltage, ultra-high-speed permanent magnet synchronous motor according to claim 1, wherein the stator core comprises a stator lamination, which is a circular sheet structure with a through hole at the center; the outer edge of the stator punching sheet is provided with a plurality of outer diameter grooves with outward openings, and the outer diameter grooves are sequentially distributed along the outer edge of the stator punching sheet; a plurality of outer diameter grooves for passing a cooling medium; outer diameter teeth are formed between every two adjacent outer diameter grooves; the outer diameter teeth are provided with through holes for cooling medium to pass through; a plurality of inner diameter grooves are formed in the inner edge of the stator punching sheet; the outer diameter groove and the inner diameter groove are correspondingly arranged.
5. The high voltage, ultra-high speed permanent magnet synchronous motor of claim 4, wherein said through-flow hole comprises at least three circular holes, adjacent two of said circular holes being arranged in overlapping relation.
6. The high voltage, ultra-high speed permanent magnet synchronous motor of claim 4, wherein one of said outer diameter teeth is provided with a marker slot for positioning.
7. The high-voltage, ultra-high-speed permanent magnet synchronous motor according to claim 1, wherein both ends of the stator core are provided with stator end plates.
8. The high-voltage, ultra-high-speed permanent magnet synchronous motor according to claim 1, wherein graphene heat dissipation layers are sprayed on the stator core, the rotor, the ends of the stator windings and the balancing ring.
9. The high voltage, ultra-high speed permanent magnet synchronous motor of claim 1, further comprising an electrical connector located on an outer wall of the housing.
10. The high voltage, ultra-high speed permanent magnet synchronous motor of claim 1, further comprising a drive end magnetic bearing and a tail end magnetic bearing, the drive end magnetic bearing and the tail end magnetic bearing being configured to support two ends of the rotor.
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| CN201810074885.8A CN108110928B (en) | 2018-01-25 | 2018-01-25 | High-voltage ultra-high-speed permanent magnet synchronous motor |
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| CN201810074885.8A CN108110928B (en) | 2018-01-25 | 2018-01-25 | High-voltage ultra-high-speed permanent magnet synchronous motor |
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| CN108711999A (en) * | 2018-06-27 | 2018-10-26 | 江苏马步崎电机制造有限公司 | A kind of Servomotor shells that radiating efficiency is high |
| CN109149821B (en) | 2018-11-07 | 2024-12-20 | 珠海格力电器股份有限公司 | Motor rotors and permanent magnet motors |
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