CN210806936U - High-speed permanent magnet motor - Google Patents
High-speed permanent magnet motor Download PDFInfo
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- CN210806936U CN210806936U CN201922425299.6U CN201922425299U CN210806936U CN 210806936 U CN210806936 U CN 210806936U CN 201922425299 U CN201922425299 U CN 201922425299U CN 210806936 U CN210806936 U CN 210806936U
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Abstract
The utility model relates to a high-speed permanent magnet motor. The high-speed permanent magnet motor includes: the utility model discloses a motor casing, install the pivot in the motor casing, the rotor of cover locating on the pivot, locate the stator of the radial outside of rotor, install cooler and the fan in the motor casing roof, the utility model discloses an install the cooler at the top of motor casing, set up fresh air inlet and exhaust vent at the top of motor casing so that the inner chamber of cooler and the inner chamber of motor casing communicate, and set up the ventilation duct in rotor and stator department in the motor casing, under the effect of fan, can bring the heat that the high-speed operation of motor produced into the cooling chamber through fresh air inlet, first axial wind channel, rotor radial wind channel, the air gap, stator radial wind channel, the exhaust vent, carry out the heat exchange through the outside air current of heat exchange tube in the cooling chamber, realize the quick cooling of motor, reduce the motor temperature rise, the cooling space has been increased to mutually communicating cooling chamber and motor casing inner chamber, improve the radiating effect of motor, and ensures the stable and reliable operation of the motor.
Description
Technical Field
The utility model relates to the technical field of motors, concretely relates to high-speed permanent-magnet machine.
Background
The high-speed permanent magnet motor has the advantages of high rotating speed, small volume, high power density, high operating efficiency and the like, and is widely applied to the industrial fields of high-speed grinding machines, energy storage flywheels, high-speed centrifugal compressors, blowers and the like. The high-speed permanent magnet motor is driven by the frequency conversion device and is directly connected with the load, so that the traditional gear speed increasing structure is omitted, and the efficiency of the whole transmission system is improved. However, in the process of variable frequency driving, the excitation frequency loaded in the stator winding of the motor is higher, so that the magnetic density alternating frequency of the stator core is far higher than that of a conventional motor, and the stator iron loss of the motor is high and the temperature is increased. An excessive temperature rise may reduce the magnetic properties of the permanent magnets in the rotor, which may lead to irreversible demagnetization of the permanent magnets in severe cases. In addition, the rotor rotating at high speed generates a large centrifugal force, but the permanent magnets cannot withstand a large tensile stress. In addition, the high rotating speed also puts more strict requirements on the bearing, but the existing bearing is limited by the rotating speed and cannot meet the requirement of the high rotating speed.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned problem that prior art exists, the utility model aims to provide a high-speed permanent-magnet machine to solve the motor stator iron that exists among the prior art and consume big, the temperature rise, vibrate big, rotor and the poor scheduling problem of permanent magnet intensity.
The embodiment of the utility model provides a high-speed permanent-magnet machine, include:
the top wall of the motor shell is provided with an air inlet hole and an air outlet hole;
the rotating shaft is arranged in the motor shell, and two ends of the rotating shaft penetrate through the side wall of the motor shell;
the rotor comprises a plurality of rotor sections which are sequentially sleeved on the rotating shaft, a rotor radial air channel is formed between every two adjacent rotor sections, and the plurality of rotor sections are provided with corresponding first axial air channels along the axial direction of the rotor sections;
the stator is arranged on the radial outer side of the rotor and comprises a plurality of stator segments which are arranged along the axial direction of the stator in a segmented mode, a stator radial air channel is formed between every two adjacent stator segments, and an air gap is formed between the inner peripheral surface of the stator and the outer peripheral surface of the rotor;
the cooler is detachably arranged on the top wall of the motor shell and is provided with an inlet and an outlet, a cooling cavity is formed in the cooler, a heat exchange pipe communicated with the inlet and the outlet is arranged in the cooling cavity, and the bottom of the cooling cavity is communicated with the air inlet hole and the air outlet hole so that the air inlet hole, the first axial air channel, the rotor radial air channel, the air gap, the stator radial air channel, the air outlet hole and the cooling cavity are sequentially communicated to form a circulating cooling air channel;
and the fan is arranged on the cooler and used for driving the cooling medium in the heat exchange pipe to circularly flow.
In some embodiments, the rotor segment includes a plurality of rotor sheets and permanent magnets, the rotor sheets are provided with a plurality of through grooves, the plurality of rotor sheets are stacked to form a rotor core, the plurality of through grooves of the plurality of rotor sheets are opposite to each other one by one to form a plurality of magnet grooves, and the permanent magnets are embedded in the magnet grooves.
In some embodiments, adjacent rotor segments are connected by a rotor ventilation groove plate, the plate surface of the rotor ventilation groove plate is perpendicular to the axial direction of the rotor, and the rotor ventilation groove plate is provided with a first through hole which is perpendicular to the axial direction of the rotor and penetrates through two ends of the rotor ventilation groove plate to form the rotor radial air duct.
In some embodiments, the permanent magnets of the rotor segments are fixedly connected with each other by a support column along the axial direction of the rotor.
In some embodiments, the stator segment comprises a plurality of stator punching sheets, the stator punching sheets are laminated to form the stator, adjacent stator segments are connected through a stator ventilation slot plate, the plate surface of the stator ventilation slot plate is perpendicular to the axial direction of the stator, and the stator ventilation slot plate is provided with a second through hole which is perpendicular to the axial direction of the stator and penetrates through two ends of the stator ventilation slot plate to form the stator radial air duct.
In some embodiments, the shaft is secured within the motor housing by a bearing arrangement that includes deep groove ball bearings and a bearing support for holding the deep groove ball bearings, the bearing support being a brass support.
In some embodiments, the motor casing is a box-type structure, a support plate for supporting the stator is installed in the motor casing, and a stator mounting hole matched with the outer diameter of the stator is formed in the support plate.
In some embodiments, the air outlet hole is arranged in the middle of the top wall of the motor casing, and the air inlet holes are arranged on the left side and the right side of the air outlet hole; the rotor with the stator install in the motor casing with the relative position of exhaust vent, the exhaust vent can cover the radial wind channel of rotor with the radial wind channel of stator.
Compared with the prior art, the embodiment of the utility model provides a high-speed permanent-magnet machine is through the top installation cooler at the motor casing, air inlet and exhaust vent are seted up at the top of motor casing so that the inner chamber of cooler and the inner chamber intercommunication of motor casing, and rotor and stator department in the motor casing set up ventilation air duct, under the effect of fan, can be with the heat that the high-speed operation of motor produced via the air inlet, first axial wind channel, the radial wind channel of rotor, the air gap, the radial wind channel of stator, the exhaust vent brings into in the cooling chamber, carry out the heat exchange through the outside air current of heat exchange tube in the cooling chamber, realize the quick cooling of motor, reduce the motor temperature rise, and simultaneously, the cooling chamber and the motor casing inner chamber of mutual intercommunication have increased the heat dissipation space, the radiating effect of motor is improved, and guarantee the steady reliable operation of.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the embodiments of the invention. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
Fig. 1 is a schematic structural diagram of a cooling system of a high-speed permanent magnet motor according to an embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is a schematic structural diagram of a rotor of a high-speed permanent magnet motor according to an embodiment of the present invention;
fig. 4 is a partial cross-sectional view of a motor casing of a high-speed permanent magnet motor according to an embodiment of the present invention.
Reference numerals:
1-motor shell, 11-mounting hole, 101-air inlet hole and 102-air outlet hole; 2-a rotating shaft;
3-rotor, 31-rotor radial air duct, 32-first axial air duct, 33-rotor punching sheet, 331-through groove, 332-axial through hole, 333-tensioning screw hole, 34-permanent magnet, 35-flat key, 36-rotor ventilation groove plate and 37-support column;
4-stator, 41-stator radial air duct, 42-air gap, 43-stator punching sheet;
5-cooler, 501-inlet, 502-outlet, 51-cooling cavity and 52-air outlet cavity;
6-heat exchange tube; 7-a fan; 8-bearing structure, 81-deep groove bearing, 82-bearing support; 9-support plate, 91-stator mounting hole.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.
Fig. 1 to 4 are schematic structural diagrams of a high-speed permanent magnet motor according to an embodiment of the present invention (arrow directions in the figures are airflow directions). As shown in fig. 1 to 4, an embodiment of the present invention provides a high-speed permanent magnet motor, including:
the top wall of the motor shell 1 is provided with an air inlet hole 101 and an air outlet hole 102;
the rotating shaft 2 is arranged in the motor shell 1, and two ends of the rotating shaft penetrate through the side wall of the motor shell 1;
the rotor 3 comprises a plurality of rotor sections which are sequentially sleeved on the rotating shaft 3, a rotor radial air duct 31 is formed between every two adjacent rotor sections, and the plurality of rotor sections are provided with corresponding first axial air ducts 32 along the axial direction;
the stator 4 is arranged on the radial outer side of the rotor 3, the stator 4 comprises a plurality of stator segments which are arranged along the axial direction of the stator 4 in a segmented mode, a stator radial air channel 41 is formed between every two adjacent stator segments, and an air gap 42 is formed between the inner peripheral surface of the stator 4 and the outer peripheral surface of the rotor 3;
the cooler 5 is detachably mounted on the top wall of the motor casing 1, the cooler 5 is provided with an inlet 501 and an outlet 502, a cooling cavity 51 is formed in the cooler 5, a heat exchange pipe 6 for communicating the inlet 501 with the outlet 502 is arranged in the cooling cavity 51, and the bottom of the cooling cavity 51 is communicated with the air inlet hole 101 and the air outlet hole 102 so that the air inlet hole 101, the first axial air duct 32, the rotor radial air duct 31, the air gap 42, the stator radial air duct 41, the air outlet hole 102 and the cooling cavity 51 are sequentially communicated to form a circulating cooling air duct;
and the fan 7 is arranged on the cooler 5 and used for driving the cooling medium in the heat exchange pipe 6 to circularly flow.
The embodiment of the utility model provides a high-speed permanent-magnet machine is through top installation cooler 5 at motor casing 1, set up fresh air inlet 101 and exhaust vent 102 so that cooler 5's inner chamber and motor casing 1's inner chamber intercommunication at motor casing 1's top, and rotor 3 and stator 4 department in motor casing 1 set up the ventilation air duct, under fan 7's effect, can be with the heat that the high-speed operation of motor produced via fresh air inlet 101, first axial wind channel 32, the radial wind channel 31 of rotor, air gap 42, the radial wind channel 41 of stator, exhaust vent 102 brings into in cooling chamber 51, carry out the heat exchange through the outside air current of heat exchange tube 6 in cooling chamber 51, realize the quick cooling of motor, reduce the motor temperature rise, and simultaneously, cooling chamber 51 and the motor casing inner chamber of intercommunication each other have increased the heat dissipation space, the radiating effect of motor is improved, and guarantee the steady reliable operation of motor.
The heat generated by the high-speed operation of the motor comprises heat caused by large stator iron loss at high frequency, heat caused by rotor eddy current loss and the like, the cooler 5 is an air-air cooler, forced air cooling is realized through the cooler 5, and when the excitation frequency in the stator winding of the high-speed operation of the motor is high, the heat caused by large stator iron loss and the heat caused by rotor eddy current loss can be quickly taken away through the cooler 5, so that the temperature rise of the motor is effectively reduced. In this embodiment, the cooling medium in the heat exchange tube 6 is cooling air, and in other embodiments, the cooling medium may also be other gas cooling media.
As shown in fig. 1 and 2, the rotor segment includes a plurality of rotor sheets 33 and permanent magnets 34, a plurality of through slots 331 are provided on the rotor sheets 33, the plurality of rotor sheets 33 are stacked to form a rotor core, the plurality of through slots 331 of the plurality of rotor sheets 33 are opposite to each other to form a plurality of magnet slots, and the permanent magnets 34 are embedded in the magnet slots.
The rotor core adopts a structure that a plurality of rotor punching sheets are laminated, can adopt the rotor punching sheet 33 with smaller diameter to carry out electromagnetic design according to the requirement of the working frequency of a high-speed motor, further selects proper pole number, reduces the action of centrifugal force at high rotating speed, and improves the strength of the permanent magnet 34 and the applicability of the rotor 3. In addition, the permanent magnet 34 adopts a built-in structure and is embedded in the rotor core, and the rotor core can protect the permanent magnet 34, so that the influence of centrifugal force on the strength of the permanent magnet 34 is weakened.
In some embodiments, as shown in fig. 4, the magnet slots are elongated and are provided near the edge of the rotor core, and the magnet slots include a plurality of groups of magnet slots that are evenly distributed in the circumferential direction of the rotor core. Each group of magnet grooves comprises three magnet grooves which are arranged in a triangular shape, the triangular shape is preferably an isosceles triangle, and the included angle between two magnet grooves which protrude towards the center of the rotor to form an inverted V-shaped structure is preferably 120 degrees, so that the magnetic effect reaches the optimal degree.
In other embodiments, the magnet slots may be arranged in other shapes, and the invention is not limited in particular. For example, each set of magnet slots may include only two magnet slots arranged in an inverted V-shape projecting toward the center of the rotor. The magnet groove is arranged in an inverted V shape, so that the magnetic leakage phenomenon can be effectively reduced.
As shown in fig. 4, a plurality of axial through holes 332 are formed in the rotor sheet 33 along the circumferential direction, and after the plurality of rotor sheets 33 are laminated, the axial through holes 332 of different rotor sheets 33 are opposite to each other one by one to form the first axial air duct 32.
A plurality of tensioning screw holes 333 are further formed in the rotor punching sheet 33 along the circumferential direction, and the tensioning screw penetrates through the tensioning screw holes 333 to tension and fix the plurality of rotor punching sheets 33. The rotor core tensioned by the tensioning screw is in interference fit with the periphery of the rotating shaft 2, and the connection reliability of the rotor core and the rotating shaft 2 is enhanced through the flat key 35.
The number and size of the through grooves 331, the axial through holes 332 and the tensioning screw holes 333 which are arranged on the rotor laminations 33 are determined according to the size and strength of the rotor laminations 33, so that the service life of the rotor laminations 33 is ensured.
In a preferred embodiment, the size of the opening of the axial through hole 332 may be set to be larger and set close to the center of the rotor sheet 33, so that the cross-sectional area of the first axial air duct 32 may be increased, the path of the air flow may be increased, and the heat dissipation effect may be improved. Because when the motor rotates at a high speed, the joint of the rotor sheet 33 and the rotating shaft 2 generates friction temperature rise fast, and therefore, the axial through hole 332 is arranged close to the center of the rotor sheet 33, so that the temperature of the high-temperature-rise parts of the motor such as the rotor 3 can be quickly reduced, and the heat dissipation effect is ensured.
In some embodiments, adjacent rotor segments are connected by a rotor ventilation groove plate 36, the surface of the rotor ventilation groove plate 36 is perpendicular to the axial direction of the rotor 3, and the rotor ventilation groove plate 36 may be an annular plate structure, is sleeved between the adjacent rotor segments of the rotating shaft 2, and has a shape matching the shape of the rotor punching sheet 33 at the corresponding position. The rotor ventilation slot plate 36 is provided with a first axial through hole penetrating through the plate surfaces of the two ends of the rotor ventilation slot plate, the first axial through hole is matched with the first axial air duct 32 to form a rotor axial air duct, and the rotor ventilation slot plate 36 is provided with a first through hole which is perpendicular to the axial direction of the rotor and penetrates through the two ends of the rotor ventilation slot plate 36 to form a rotor radial air duct 31. Preferably, the first through hole may be a through hole directly opened in the vent groove plate 36 and penetrating both ends thereof; in another embodiment, the rotor ventilation slot plate 36 may be a hollow structure, and two ends of the rotor ventilation slot plate 36 perpendicular to the axial direction of the rotor are respectively provided with through holes to form first through holes. The rotor radial air duct 31 in the axial direction of the motor rotor and the rotor axial air duct in the axial direction can be guided by the rotor ventilation groove plates 36, and the two air duct channels can be separated from each other without influencing each other, so that the heat dissipation of the motor rotor 3 is ensured.
In other embodiments, the rotor ventilation slot plate 36 may also be a rotor ventilation slot plate stamped sheet respectively attached to axial end faces of different rotor segments, for example, the right side of the first rotor segment is adjacent to and spaced apart from the left side of the second rotor segment, the first ventilation slot plate stamped sheet is attached to the right axial end face of the first rotor segment, the stator ventilation slot plate stamped sheet is attached to the left axial end face of the second rotor segment, the first ventilation slot plate stamped sheet and the stator ventilation slot plate stamped sheet form the rotor ventilation slot plate 36 oppositely, the first ventilation slot plate stamped sheet and the stator ventilation slot plate stamped sheet are respectively provided with an axial through hole to cooperate with the first axial air duct 32 to form the rotor axial air duct, and a radial space formed between the first ventilation slot plate stamped sheet and the stator ventilation slot plate stamped sheet is the rotor radial air duct 31.
Similarly, a plurality of stator segments of the stator 4 are provided with corresponding second axial air ducts along the axial direction, each stator segment comprises a plurality of stator punching sheets 43, the plurality of stator punching sheets 43 are laminated to form the stator 4, adjacent stator segments are connected through stator ventilation slot plates, and the plate surfaces of the stator ventilation slot plates are perpendicular to the axial direction of the stator 4.
The second axial air duct is connected with the first axial air duct 32 in parallel, and the air inlet hole 101, the second axial air duct, the stator radial air duct 41, the air outlet hole 102 and the cooling cavity 51 are sequentially communicated to form a circulating cooling air duct of the stator 4 so as to cool the stator 4; meanwhile, the circulating cooling air duct formed by sequentially communicating the air inlet hole 101, the first axial air duct 32, the rotor radial air duct 31, the air gap 42, the stator radial air duct 41, the air outlet hole 102 and the cooling cavity 51 can quickly take away heat caused by large stator iron loss at high frequency, and the heat dissipation effect of the motor is effectively improved.
In some embodiments, the air gap 42 between the inner circumferential surface of the stator 4 and the outer circumferential surface of the rotor 3 may form a third axial air duct, so as to further increase the heat dissipation flow area and improve the heat dissipation effect.
The stator ventilation slot plate is similar to the rotor ventilation slot plate 36 in structure, and the stator ventilation slot plate may be an annular plate structure, is sleeved on the radial outer side of the rotor 3 and is located between adjacent stator sections, and the shape of the stator ventilation slot plate is matched with the shape of the stator punching sheet 43 at the corresponding position. The stator ventilation frid has perpendicular to stator axial direction and runs through the second through-hole of stator ventilation frid both ends in order to form the radial wind channel of stator. The stator ventilation slot plate can also be respectively attached to stator ventilation slot plate punching sheets on the axial end faces of different stator sections, and the structure of the stator ventilation slot plate punching sheet is similar to that of the rotor ventilation slot plate punching sheet enough, so that the details are not repeated.
In the embodiment, the rotor ventilation slot plate 36 and the stator ventilation slot are arranged in a hollow annular plate structure, so that the assembly and disassembly are convenient, the strength of the ventilation slot plate can be ensured, the deformation of the ventilation slot plate can be prevented, and the long-term safe and reliable operation of the motor can be ensured; in addition, the hollow plate structure can ensure that the rotor radial air duct 31 and the stator radial air duct 41 which are arranged up and down are opposite to each other, so that the smoothness of the air ducts is ensured; meanwhile, the air flow can be guided, the air flow is prevented from flowing randomly, and the heat dissipation effect is guaranteed.
In some embodiments, the plurality of permanent magnets 34 of the plurality of rotor segments are fixedly connected to each other by support columns 37 in the axial direction of the rotor 3. Specifically, the permanent magnets 34 are inserted into the rotor core formed by the corresponding rotor sheets 33 in a segmented manner, and the permanent magnets 34 of different rotor segments can be supported by the supporting columns 37, so that the permanent magnets 34 of different rotor segments are prevented from axially moving, and the stability and reliability of the rotation of the motor are ensured.
In some embodiments, as shown in fig. 1, the rotating shaft 2 is fixed in the motor casing 1 through a bearing structure 8, and the bearing structure 8 includes a deep groove ball bearing 81 and a bearing bracket 82 for holding the deep groove ball bearing 81, so as to improve the strength of the rotating shaft 2 and meet the requirement of the maximum rotating speed of the motor in high-speed operation. The bearing support 82 is preferably a brass support.
In some embodiments, as shown in fig. 1 and 4, the motor casing 1 is a box-type structure, a support plate 9 for supporting the stator 4 is installed in the motor casing 1, and a stator mounting hole 91 matched with the outer diameter of the stator 4 is formed in the support plate 9.
The motor casing 1 is formed by welding steel plates and comprises a front side wall, a rear side wall, a left side wall, a right side wall, a bottom wall and a top wall for mounting the cooler 5. The front side wall and the rear side wall are both provided with mounting holes 11 for mounting the motor rotor 3 and the stator 4, and the diameter phi of the mounting holes 111The diameter phi of the mounting hole 11 is determined according to the outer diameter of the stator 4 disposed radially outside the rotor 31Slightly larger than the outer diameter of the stator 4 so that the rotor 3 and the stator 4 can be smoothly fitted.
As shown in fig. 1 and 2, the air outlet 102 is disposed at the middle position of the top wall of the motor casing 1, and the air inlet 101 is disposed at the left and right sides of the air outlet 102; the rotor 3 and the stator 4 are arranged in the motor casing 1 at positions opposite to the air outlet 102, and the air outlet 102 can cover the rotor radial air duct 31 and the stator radial air duct 41. The air outlet 102 includes a plurality of through holes arranged in the middle region of the top wall, and the rotor radial air duct 31, the stator radial air duct 41 and the air outlet 102 may form an open structure along the airflow direction so as to rapidly dissipate heat generated in the motor casing 1.
In this embodiment, the air outlet 102 is arranged at the middle position of the motor casing 1, that is, a heat dissipation manner of air inlet at two sides and air outlet at the middle is adopted; in other embodiments, a heat dissipation manner of air inlet at the middle and air outlet at the two sides may also be adopted, that is, the air inlet hole is disposed at the middle position of the motor casing 1, and the air outlet holes are disposed at the left and right sides of the air inlet hole, at this time, the air inlet hole, the stator radial air duct 41, the air gap 42, the rotor radial air duct 31, the first axial air duct 32, the air outlet hole, and the cooling cavity 51 are sequentially communicated to form a circulating cooling air duct.
As shown in fig. 1, the heat exchange tubes 6 are transversely arranged in the cooling cavity 51, so that the heat exchange space can be effectively enlarged, and the heat exchange effect is improved; meanwhile, a plurality of groups of heat exchange tubes 6 can be arranged in the cooling cavity 51 at intervals up and down to further improve the heat exchange effect. The cooler 5 further comprises an air outlet cavity 52 communicated with the outlet 502, and the cross section of the air outlet cavity 52 is larger than the diameter of the outlet 502, so that hot air can flow out quickly, and quick cooling of the motor is achieved.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.
Claims (8)
1. A high speed permanent magnet electric machine comprising:
the top wall of the motor shell is provided with an air inlet hole and an air outlet hole;
the rotating shaft is arranged in the motor shell, and two ends of the rotating shaft penetrate through the side wall of the motor shell;
the rotor comprises a plurality of rotor sections which are sequentially sleeved on the rotating shaft, a rotor radial air channel is formed between every two adjacent rotor sections, and the plurality of rotor sections are provided with corresponding first axial air channels along the axial direction of the rotor sections;
the stator is arranged on the radial outer side of the rotor and comprises a plurality of stator segments which are arranged along the axial direction of the stator in a segmented mode, a stator radial air channel is formed between every two adjacent stator segments, and an air gap is formed between the inner peripheral surface of the stator and the outer peripheral surface of the rotor;
the cooler is detachably arranged on the top wall of the motor shell and is provided with an inlet and an outlet, a cooling cavity is formed in the cooler, a heat exchange pipe communicated with the inlet and the outlet is arranged in the cooling cavity, and the bottom of the cooling cavity is communicated with the air inlet hole and the air outlet hole so that the air inlet hole, the first axial air channel, the rotor radial air channel, the air gap, the stator radial air channel, the air outlet hole and the cooling cavity are sequentially communicated to form a circulating cooling air channel;
and the fan is arranged on the cooler and used for driving the cooling medium in the heat exchange pipe to circularly flow.
2. The high-speed permanent magnet motor of claim 1, wherein the rotor section comprises a plurality of rotor sheets and permanent magnets, a plurality of through grooves are formed in the rotor sheets, the plurality of rotor sheets are stacked to form a rotor core, the plurality of through grooves of the plurality of rotor sheets are opposite to one another to form a plurality of magnet grooves, and the permanent magnets are embedded in the magnet grooves.
3. The high-speed permanent magnet motor according to claim 2, wherein adjacent rotor segments are connected by rotor ventilation slot plates, the plate surfaces of the rotor ventilation slot plates are perpendicular to the axial direction of the rotor, and the rotor ventilation slot plates are provided with first through holes which are perpendicular to the axial direction of the rotor and penetrate through two ends of the rotor ventilation slot plates to form the radial air ducts of the rotor.
4. The high-speed permanent magnet motor of claim 2, wherein the permanent magnets of the rotor segments are fixedly connected by support posts in the axial direction of the rotor.
5. The high-speed permanent magnet motor according to claim 1, wherein the stator segment comprises a plurality of stator laminations, the stator laminations are stacked to form the stator, adjacent stator segments are connected through a stator ventilation slot plate, the plate surface of the stator ventilation slot plate is perpendicular to the axial direction of the stator, and the stator ventilation slot plate is provided with a second through hole which is perpendicular to the axial direction of the stator and penetrates through two ends of the stator ventilation slot plate to form the stator radial air duct.
6. The high-speed permanent magnet motor of claim 1, wherein the shaft is secured within the motor casing by a bearing arrangement comprising deep groove ball bearings and bearing brackets for retaining the deep groove ball bearings, the bearing brackets being brass brackets.
7. The high-speed permanent magnet motor of claim 1, wherein the motor casing is a box structure, a support plate for supporting the stator is installed in the motor casing, and a stator mounting hole matched with the outer diameter of the stator is formed in the support plate.
8. The high-speed permanent magnet motor according to claim 1, wherein the air outlet hole is arranged at the middle position of the top wall of the motor casing, and the air inlet holes are arranged at the left side and the right side of the air outlet hole; the rotor with the stator install in the motor casing with the relative position of exhaust vent, the exhaust vent can cover the radial wind channel of rotor with the radial wind channel of stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922425299.6U CN210806936U (en) | 2019-12-27 | 2019-12-27 | High-speed permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922425299.6U CN210806936U (en) | 2019-12-27 | 2019-12-27 | High-speed permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210806936U true CN210806936U (en) | 2020-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922425299.6U Active CN210806936U (en) | 2019-12-27 | 2019-12-27 | High-speed permanent magnet motor |
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| CN (1) | CN210806936U (en) |
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2019
- 2019-12-27 CN CN201922425299.6U patent/CN210806936U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |