CN115296453A - Modular stator for annular permanent magnet motor - Google Patents
Modular stator for annular permanent magnet motor Download PDFInfo
- Publication number
- CN115296453A CN115296453A CN202211186259.0A CN202211186259A CN115296453A CN 115296453 A CN115296453 A CN 115296453A CN 202211186259 A CN202211186259 A CN 202211186259A CN 115296453 A CN115296453 A CN 115296453A
- Authority
- CN
- China
- Prior art keywords
- stator
- modular
- permanent magnet
- iron core
- stator tooth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 43
- 238000004804 winding Methods 0.000 claims description 31
- 238000004080 punching Methods 0.000 claims description 25
- 230000003014 reinforcing effect Effects 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 15
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 241000446313 Lamella Species 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- 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
-
- 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
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/15—Sectional machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/12—Machines characterised by the modularity of some components
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a modular stator for an annular permanent magnet motor, which comprises two upper stator lobes (1) and two lower stator lobes (2); the two upper stator lobes (1) and the two lower stator lobes (2) are spliced with each other and assembled into a complete stator by end face connecting plate fasteners (9). When a certain module or a plurality of modules are damaged in the using process, the damaged modules can be maintained or replaced as long as the machine is adjusted to the maintenance mode to stop the machine. The efficiency of removing obstacles can be improved, and the cost of maintenance can also be practiced thrift. And during the transportation and installation of the stator, the modular design enables the stator to realize modular miniaturization, thereby being convenient for transportation and installation.
Description
Technical Field
The invention relates to the technical field of permanent magnet motors, in particular to a modular stator for an annular permanent magnet motor.
Background
The permanent magnet motor has the advantages of high efficiency, high moment-inertia ratio, high energy density, low carbon, environmental protection and the like, and is gradually one of the main development trends of the future motors. The stator is a stationary part of the motor, is used for generating a rotating magnetic field and mainly comprises a machine base, a stator iron core, a winding coil and other structural members for fixing the parts.
On the one hand, the stator notch is punched out by adopting the mode of integral punching for the stator punching of the existing permanent magnet motor stator core, and the structure is used on an annular motor, so that the utilization rate of the stator punching is reduced, the waste of raw materials is caused, and the production cost of products is increased.
On the other hand, the conventional assembly process of the stator core with the winding and the base adopts a hot-sleeve assembly technology, the stator core with the winding and the base are assembled together, the hot-sleeve assembly is that the base is cooled after being heated and expanded by utilizing the principle of expansion with heat and contraction with cold at a higher temperature, and the base shrinks and wraps the stator core with the winding, so that the reliability is high.
However, the ring-shaped permanent magnet motor adopts an IM5710 installation mode, is designed and assembled in a split mode, has no rotating shaft and no bearing, a rotor of the motor is fixed on a ball mill flange plate through a rotor support, and a stator is directly fixed on the ground, so that the traditional shrink fit assembly process is not applicable.
Disclosure of Invention
To solve the problems in the prior art, the invention provides a modular stator for an annular permanent magnet motor. The modular stator for the annular permanent magnet motor is of a modular structure with a quartering design and comprises two upper stator lobes and two lower stator lobes; the two upper stator lobes and the two lower stator lobes are spliced with each other and are spliced with each other through the end face connecting plate fastener to form a complete stator, and the stator which is assembled is of a circular structure.
Armature windings of the upper stator lobe and the lower stator lobe are divided into a U phase, a V phase and a W phase, electrical connection is achieved through winding coils wound on each stator tooth iron core of the stator iron core according to design requirements of an electrical circuit diagram, each phase is composed of three branches, the three branches are connected in parallel to a collector ring of each stator lobe in a welding mode, and the collector rings between the stator lobes are connected in series in a bolt fastening mode.
Wherein, upper portion stator lamella includes frame, a plurality of stator tooth iron core, two temperature sensor. Two temperature sensors are pre-buried in the middle position of the inside of the upper stator lobe winding.
The upper machine base comprises a stator core mounting plate, an upper machine shell side wall, an end connecting plate, a machine base inner reinforcing plate, a reinforcing steel pipe and a lug base.
The stator core mounting plate is provided with a plurality of through holes in the inner circle surface, and the through holes are used for mounting the stator tooth cores. The stator tooth iron core is fixedly arranged on the stator iron core mounting plate through a stator tooth iron core fastener.
The outer surface of the stator core mounting plate is provided with three upper shell side walls respectively, and a certain distance is reserved between two ends of each upper shell side wall and used for welding an end connecting plate. And a plurality of inner engine base reinforcing plates are arranged between the side walls of the upper casing and are distributed in a divergent manner at intervals of 15 degrees along the radial direction.
Wherein, a plurality of through holes are arranged on the side wall of the upper shell at equal angles and used for installing reinforcing steel pipes.
Preferably, the upper casing side wall is provided with three through holes.
The reinforced steel pipe can be used as a hoisting position for vertically hoisting the base while playing a role in reinforcing the structure.
The surface of the end connecting plate is provided with a plurality of spot-facing holes, and the spot-facing holes are used for installing connecting plate fasteners.
Wherein, the side of the adjacent end connecting plate is provided with a seam riding pin hole for installing a seam riding pin.
Wherein, the outer side of the side wall of the shell of the upper machine base is provided with a lug seat; the lifting lug seat is provided with a threaded hole, and the lifting ring is arranged on the threaded hole and used for horizontally lifting the base.
The stator tooth iron cores are in modular design, each stator tooth iron core is a module unit, and the modular stator tooth iron cores are sequentially assembled on a stator iron core mounting plate of the base to form a single stator lobe.
The stator tooth iron core comprises a stator tooth punching sheet, a stator iron core fixing key, a stator iron core pressing plate, a stator insulation end plate and a winding coil.
The stator tooth iron core is formed by laminating, riveting, fastening and welding a plurality of sector stator tooth punching sheets in a segmented manner; a key groove is formed in the middle of the stator tooth punching sheet, and welding seam grooves are formed in the two sides of the stator tooth punching sheet; the stator core pressing plates are positioned at two ends of the stator tooth punching sheets, one end of the stator core fixing key sequentially penetrates through the stator core pressing plates and the stator tooth punching sheets at the two ends, and the two ends are welded and fixed; the stator insulation end plates are positioned at two ends of the stator tooth iron core; the winding coil is formed by winding a plurality of turns of copper wires.
The end face connecting plate fastener comprises a hexagon bolt, a flat washer, a spring washer and a nut; the stator tooth iron core fastener comprises an inner hexagonal socket head screw, a flat washer and a spring washer.
Wherein, lower part stator lamella includes frame, a plurality of stator tooth iron core, two temperature sensor down.
The lower machine base comprises a lower machine shell side wall, a foundation bolt mounting plate, a stator core mounting plate, an end connecting plate, a machine base inner reinforcing plate, a reinforcing steel pipe and a lug base.
The stator core mounting plate is arranged on the lower machine base, and the inner circular surface of the stator core mounting plate of the lower machine base is provided with a plurality of through holes for mounting the stator tooth cores. The stator tooth iron core is fixedly arranged on the stator iron core mounting plate through a stator tooth iron core fastener.
The outer surface of the stator core mounting plate of the lower base is respectively provided with three lower casing side walls, and a certain distance is reserved between two ends of each lower casing side wall for welding an end connecting plate.
Wherein, a plurality of inner engine base reinforcing plates are arranged between the side walls of the lower casing.
And a plurality of through holes are formed in the side wall of the lower casing at equal angles and used for installing reinforcing steel pipes.
The reinforced steel pipe can be used as a hoisting position for vertically hoisting the base while playing a role in reinforcing the structure.
The surface of the end connecting plate is provided with a plurality of spot-facing holes; and the side surface of the connecting plate at the adjacent end part is provided with a seam riding pin hole for installing a seam riding pin.
The outer side of the side wall of the shell of the lower base is provided with a lug seat; the lifting lug seat is provided with a threaded hole, and the lifting ring is arranged on the threaded hole and used for horizontally lifting the base.
The bottom of the lower base is provided with a foundation bolt mounting plate for mounting a foundation bolt; the side wall of the lower machine shell is provided with a notch which is used as an operation space for screwing the foundation bolt.
Drawings
Fig. 1 is a schematic view of a general assembly structure of a modular stator for an annular permanent magnet motor according to the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic view of an upper stator lobe structure of a modular stator for an annular permanent magnet machine according to the present invention.
Fig. 4 is a schematic structural diagram of an upper base of a modular stator for an annular permanent magnet motor according to the present invention.
Fig. 5 is a schematic view of the lower stator lobe structure of the modular stator for the ring-shaped permanent magnet motor according to the present invention.
Fig. 6 is a schematic structural view of a lower base of the modular stator for the ring-shaped permanent magnet motor according to the present invention.
Fig. 7 is a schematic view of a structure of a wound stator tooth core of a modular stator for a ring-shaped permanent magnet motor according to the present invention.
Fig. 8 is a schematic structural diagram of a stator tooth punching sheet with windings of a modular stator for an annular permanent magnet motor.
In the figure: 1. an upper stator lobe; 2. a lower stator lobe; 3. an upper machine base; 301. a stator core mounting plate; 302. an upper housing sidewall; 303. an end connecting plate; 304. a reinforcing plate in the machine base; 305. reinforcing the steel pipe; 306. a lug seat; 307. a first through hole; 308. a second through hole; 309. a third through hole; 4. a lower machine base; 401. a lower housing sidewall; 402. mounting a foundation bolt; 5. a stator core; 6. a stator tooth core; 601. stator tooth punching sheets; 602. a stator core fixing key; 603. a stator core pressing plate; 604. a stator insulating end plate; 605. a winding coil; 7. a collector ring; 8-1,8-2, a temperature sensor; 9. an end face connection plate fastener; 10. a stator tooth core fastener; 11. a dowel pin; 11-1, a first perforation pin hole; 11-2 and a second perforation pin hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Fig. 1 shows a schematic diagram of a modular stator assembly structure for an annular permanent magnet motor according to the present invention.
The modularized stator is of a quartering modular structure and comprises two upper stator lobes 1 and two lower stator lobes 2; the two upper stator lobes 1 and the two lower stator lobes 2 are spliced with each other and assembled into a complete stator through the end face connecting plate fasteners 9, and the assembled stator is of a circular structure. As shown in fig. 1, it should be noted that fig. 1 only shows a structure in which the left upper stator vane 1 and the left lower stator vane 2 are connected by the end-face connecting plate fastener 9, and due to the angle of the drawing, the connection point of the two upper stator vanes 1, the connection point of the two lower stator vanes 2, and the connection point of the right upper stator vane 1 and the right lower stator vane 2 in fig. 1 are not marked with the end-face connecting plate fastener 9, but the connection points are also connected and fixed by the end-face connecting plate fastener 9.
Each of the upper and lower stator lobes 1 and 2 is actually a quarter of a circle, and thus the angle formed by both ends of each of the upper and lower stator lobes 1 and 2 to the circle of the circle is 90 °.
Armature windings of the upper stator lobe 1 and the lower stator lobe 2 are divided into a U phase, a V phase and a W phase, electrical connection is achieved through a winding coil 605 wound on each stator tooth iron core 6 of the stator iron core 5 according to design requirements of an electrical circuit diagram, each phase is composed of three branches, the three branches are connected in parallel to a bus ring 7 of each stator lobe in a welding mode, and the bus rings 7 between the stator lobes are connected in series in a bolt fastening mode.
Referring to fig. 3-4, the upper stator segment 1 includes an upper housing 3, a plurality of stator tooth cores 6, and two temperature sensors 8-1 and 8-2. Two temperature sensors 8-1 and 8-2 are pre-embedded in the middle of the inside of the winding of the upper stator segment 1 and are respectively bound on a flat copper wire welded by the winding and the V-phase bus ring and a flat copper wire welded by the winding and the W-phase bus ring. The temperature sensor is a thermistor, sensing temperature and temperature-related parameters by using the characteristic that the resistance value of the thermistor changes along with the temperature change, and converting the parameter change into an electric signal by a well and sending the electric signal into a control system to realize automatic control. When the temperature exceeds a certain threshold value, the control system gives an alarm in time and stops the machine for inspection, thereby avoiding the temperature of the motor from exceeding the highest working temperature or the temperature rise from exceeding the specification. When the equipment is in normal operation, the temperature sensor 8-1 is used for actual operation, and the temperature sensor 8-2 is used as a backup, so that when the actually-operated temperature sensor fails, the backup temperature sensor can timely replace the failed temperature sensor to operate.
The upper machine base 3 comprises a stator core mounting plate 301, an upper shell side wall 302, an end connecting plate 303, a machine base inner reinforcing plate 304, a reinforcing steel pipe 305 and a lifting lug base 306.
The inner circular surface of the stator core mounting plate 301 is provided with a plurality of through holes for mounting the stator tooth cores 6. The stator tooth core 6 is fixedly mounted on the stator core mounting plate 301 by a stator tooth core fastener 10.
Three upper casing side walls 302 are respectively arranged on the outer surface of the stator core mounting plate 301, and a certain distance is reserved between two ends of each upper casing side wall 302 and used for welding the end connecting plate 303. A plurality of inner engine base reinforcing plates 304 are arranged between the side walls 302 of the upper engine shell and are distributed in a divergent manner at intervals of 15 degrees along the radial direction, and the distribution direction is the same as the shear stress [ tau ] direction borne by the engine shell. The inner reinforcing plate 304 of the machine base can equivalently form a heat dissipation rib while ensuring the requirements of strength, rigidity and stability, so that the heat dissipation area is increased, the temperature rise of the motor is reduced, and the temperature rise is relatively lower by more than 5K under the condition of the same load.
The upper casing side wall 302 is provided with a plurality of through holes at equal angles for installing the reinforcing steel pipes 305. Preferably, the upper housing sidewall 302 is provided with three through holes, respectively through hole one 307, through hole two 308 and through hole three 309. The included angle between the circle centers of the first through hole 307 and the second through hole 308 and the connecting line of the circle centers of the whole modular stator is 22.5 degrees; the included angle between the circle centers of the second through hole 308 and the third through hole 309 and the connecting line of the circle centers of the whole modular stator is 22.5 degrees; the included angle between the circle center of the first through hole 307 and the connecting line of the end connecting plate 303 and the circle center of the whole modular stator is also 22.5 degrees; the center of the through hole III 309 and the connecting line between the end connecting plate 303 and the center of the whole modular stator form an included angle of 22.5 degrees.
The reinforced steel pipe 305 can serve as a hoisting position for vertically hoisting the base while playing a role in structure reinforcement.
Referring to fig. 1, 3 and 4, the surface of the end connecting plate 303 is provided with a plurality of spot-facing holes, so that the perpendicularity of the hole opening and the hole center line is ensured, the bolt end face of the connecting plate fastener 9 can be kept in good contact with the end connecting plate 303, and the connection is more reliable. A first joint riding pin hole 11-1 and a second joint riding pin hole 11-2 are formed in the side face of the connecting plate 303 at the adjacent end part of the upper machine base 3 and used for installing the joint riding pins 11; the first perforation pin hole 11-1 is radial, and the second perforation pin hole 11-2 is axial; a first riding seam pin hole 11-1 and a second riding seam pin hole 11-2 of the end part connecting plate 303 adjacent to the upper machine base 3 are semi-smooth holes, and the two upper machine bases 3 are matched with each other to install riding seam pins 11; the end connecting plate 303 of the lower base 4 connected with the upper base 3 is also provided with a first perforation pin hole 11-1 and a second perforation pin hole 11-2, and the structure and the installation form are the same as the above. The two lower bases 4 are connected through an end connecting plate 303; however, unlike the foregoing, the end connection plate 303, to which the two lower frames 4 are connected, is provided with only the second saddle pin holes 11-2 because the lower frames 4 have fixed the lower frames 4 by the anchor bolt mounting plates 402 in the radial direction.
The seam crossing pin 11 is arranged between the adjacent end connecting plates 303, and during assembly, the seam crossing pin 11 is clamped in the half smooth hole of one end connecting plate 303, and then the half smooth hole of the other end connecting plate 303 is clamped on the seam crossing pin 11, so that the effect of installation and positioning is achieved, and the stator lobes are prevented from rotating and shifting.
The outer side of the side wall of the shell of the upper machine base 3 is provided with a lug seat 306; the lifting lug seat 306 is provided with a threaded hole, and the lifting ring is arranged on the threaded hole and used for horizontally lifting the base.
Referring to fig. 3, 4 and 7, the stator tooth cores 6 are in a modular design, each stator tooth core 6 is a module unit, and a plurality of modular stator tooth cores 6 are sequentially assembled on a stator core mounting plate 301 of the base to form a single stator lobe. The stator tooth core 6 comprises a stator tooth punching sheet 601, a stator core fixing key 602, a stator core pressing plate 603, a stator insulation end plate 604 and a winding coil 605.
The end face connecting plate fastener 9 comprises a hexagon bolt, a flat washer, a spring washer and a nut; the stator tooth iron core fastener 10 comprises an inner hexagonal socket head cap screw, a flat washer and a spring washer.
Referring to fig. 5 and 6, the lower stator lobe 2 includes a lower housing 4, a plurality of stator tooth cores 6, and two temperature sensors 8-1 and 8-2. Two temperature sensors 8-1 and 8-2 are pre-embedded in the middle of the lower stator segment 2 winding and are respectively bound on a flat copper wire welded by the winding and the V-phase bus ring and a flat copper wire welded by the winding and the W-phase bus ring. The temperature sensor is a thermistor, and it uses the property that the resistance value of the thermistor changes with the temperature to sense the temperature and the parameters related to the temperature, and the well converts the parameter change into electric signal, and sends it into the control part to realize automatic control. When the temperature exceeds a certain threshold value, the control system gives an alarm in time and stops the machine for inspection, thereby avoiding the temperature of the motor from exceeding the highest working temperature or the temperature rise from exceeding the specification. When the equipment is in normal operation, the temperature sensor 8-1 is used for actual operation, and the temperature sensor 8-2 is used as a backup, so that when the actually-operated temperature sensor fails, the backup temperature sensor can timely replace the failed temperature sensor to operate.
The lower machine base 4 comprises a lower machine shell side wall 401, an anchor bolt mounting plate 402, a stator core mounting plate 301, an end connecting plate 303, a machine base inner reinforcing plate 304, a reinforcing steel pipe 305 and a lifting lug base 306.
The inner circular surface of the stator core mounting plate 301 of the lower frame 4 is provided with a plurality of through holes for mounting the stator tooth cores 6. The stator tooth core 6 is fixedly mounted on the stator core mounting plate 301 by a stator tooth core fastener 10.
The outer surface of the stator core mounting plate 301 of the lower frame 4 is respectively provided with three lower casing side walls 401, and a certain distance is reserved between two ends of each lower casing side wall 401 for welding the end connecting plate 303. A plurality of inner engine base reinforcing plates 304 are arranged between the side walls 401 of the lower casing and are distributed in a divergent manner at intervals of 15 degrees along the radial direction, and the distribution direction is the same as the shear stress [ tau ] direction borne by the casing. The inner reinforcing plate 304 of the base can be equivalent to a heat dissipation rib while ensuring the requirements on strength, rigidity and stability, so that the heat dissipation area is increased, the temperature rise of the motor is reduced, and the temperature rise is relatively lower by more than 5K under the same load condition.
The lower casing side wall 401 is provided with a plurality of through holes at equal angles for installing the reinforcing steel pipes 305. Preferably, the lower case side wall 401 is provided with three through holes. The arrangement of the three through holes is the same as the upper housing sidewall 302, and will not be described herein.
The reinforced steel pipe 305 can serve as a hoisting position for vertically hoisting the base while playing a role in structure reinforcement.
Referring to fig. 1, 5 and 6, the surface of the end connecting plate 303 is provided with a plurality of spot-facing holes, so that the perpendicularity of the hole opening and the hole center line is ensured, the bolt end face of the connecting plate fastener 9 can be kept in good contact with the end connecting plate 303, and the connection is more reliable. And the side surface of the adjacent end connecting plate 303 is provided with a seam riding pin hole for installing a seam riding pin 11.
The outer side of the side wall of the shell of the lower machine base 4 is provided with a lug seat 306; threaded holes are formed in the lifting lug seats 306, and lifting rings are installed on the threaded holes and used for horizontally lifting the base.
Referring to fig. 5, 6 and 7, the stator tooth core 6 is of a modular design, each stator tooth core 6 is a module unit, and a plurality of modular stator tooth cores 6 are sequentially assembled on a stator core mounting plate 301 of the lower machine base to form a single stator lobe. The stator tooth core 6 includes a stator tooth punching plate 601, a stator core fixing key 602, a stator core pressing plate 603, a stator insulation end plate 604, and a winding coil 605.
The stator tooth iron core 6 is formed by laminating, riveting, fastening and welding a plurality of sector stator tooth punching sheets 601 in a segmented manner, and the laminating coefficient is not less than 0.98; the stator tooth punching sheet 601 is large in resistance coefficient, small in hysteresis loop area and 0.5mm in thickness, a key groove is formed in the middle, and welding seam grooves are formed in two sides; the stator core pressing plates 603 are located at two ends of the laminated stator tooth punching sheet 601, one end of the stator core fixing key 602 sequentially penetrates through the stator core pressing plates 603 and the stator tooth punching sheet 601 at the two ends, and the two ends are welded and fixed; meanwhile, welding seam grooves on two sides of the stator tooth punching sheet 601 are welded and then ground flat; the stator insulation end plates 604 are positioned at two ends of the stator tooth iron core 6, are made of PA66 materials, and have high mechanical strength, high softening point, good heat resistance and good electrical insulation; the winding coil 605 is formed by winding a plurality of turns of copper wires, and the copper wires are wrapped by high-strength composite films, so that the loss is low and the efficiency is high.
Referring to fig. 6, an anchor bolt mounting plate 402 is disposed at the bottom of the lower base 4 for mounting an anchor bolt; the side wall 401 of the lower casing is provided with a gap as an operation space for tightening the foundation bolt.
Modular upper and lower stator lobes 1 and 2 are assembled as described above to form a complete stator having a diameter greater than 1180mm.
In summary, due to the adoption of the technology of the invention, the beneficial effects of the invention are as follows:
in the present invention, the modular split design of the stator is a modular quartering design of the stator, each stator lobe is 90 °, but not limited thereto, and the stator may be divided into two lobes, three lobes, or six lobes, for example. The stator petals are connected and fixed by the aid of the seam-riding pins and the fasteners, so that the installation and positioning effects are achieved, and the stator petals are prevented from rotating and shifting. The assembly manufacturability is good, easy installation is dismantled, improve equipment stability.
In the invention, the stator adopts a plurality of split modular designs, each module is assembled into a complete stator in a split mode, and when a certain module or a plurality of modules are damaged in the use process, the damaged modules can be maintained or replaced by only adjusting the machine to a maintenance mode to stop the machine. If only one module is damaged or fails, the module can be repaired only by replacing or repairing the module, so that the fault removing efficiency can be greatly improved, and the repairing cost can be greatly saved. And during the transportation and installation of the stator, the modular design enables the stator to realize modular miniaturization, thereby being convenient for transportation and installation.
According to the invention, the stator core is divided into the plurality of modularized stator tooth cores along the circumferential direction, so that the electromagnetic performance requirement of the motor is met, a reasonable punching sheet structure is selected, the utilization rate of silicon steel sheets is improved, the material waste is reduced, the resources are saved, and the production cost is reduced.
In the invention, the stator core is processed into a complete whole by VPI vacuum pressurization and paint dipping, and the stator core has good electrical, mechanical, moisture-proof performance and thermal stability and high production efficiency.
In the invention, the engine base mainly comprises a shell side wall, a stator core mounting plate, an inner reinforcing plate, a reinforcing steel pipe and the like. Wherein, the reinforced steel pipes are uniformly distributed at intervals of 22.5 degrees, the inner reinforced plates are distributed in a divergence shape at intervals of 15 degrees along the radial direction and are the same as the shear stress [ tau ] direction borne by the casing, the structure is more reasonable, the stress is more uniform, the weight of the whole machine base is lightened, and the purpose of reducing the production cost is achieved.
According to the invention, the non-closed cavity structure formed between the side wall of the shell and the reinforcing structure can enable the inner reinforcing plate structure to be equivalent to a heat dissipation rib, so that the heat dissipation area is increased, the temperature rise of the motor is obviously reduced, and the temperature rise is reduced by more than 5K under the same load condition.
In the invention, a temperature sensor is pre-embedded in the middle position inside the winding of the stator valve, a temperature variable is converted into an instrument capable of transmitting a standardized output signal, and the temperature acquisition range can reach-50 ℃ to 200 ℃. The temperature of the embedded point winding is monitored in real time, the effectiveness of the temperature control protection function is ensured, the condition that the temperature of the motor exceeds the highest working temperature or the temperature rise exceeds the specification is avoided, and the reliability of equipment is improved.
In the invention, the structural style of supporting by the left foot bolt mounting plate, the middle foot bolt mounting plate and the right foot bolt mounting plate is adopted, so that the structure is more reasonable, the stress is more uniform, the strength is high, the rigidity is high, and the stability is good.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A modular stator for an annular permanent magnet machine, characterized by: the modular stator for an annular permanent magnet machine comprises two upper stator lobes (1) and two lower stator lobes (2); the two upper stator lobes (1) and the two lower stator lobes (2) are spliced with each other and assembled into a complete stator through end face connecting plate fasteners (9); armature windings of the upper stator lobe (1) and the lower stator lobe (2) are divided into a U phase, a V phase and a W phase, electrical connection is achieved through winding coils (605) wound on each stator tooth iron core (6) of the stator iron core (5) according to the design requirements of an electrical circuit diagram, each phase is composed of three branches, the three branches are connected in parallel to a bus ring (7) of each stator lobe in a welding mode, and the bus rings (7) between the stator lobes are connected in series in a bolt fastening mode.
2. A modular stator for an annular permanent magnet machine according to claim 1, characterized in that: the upper stator segment (1) comprises an upper machine base (3), a plurality of stator tooth iron cores (6) and two temperature sensors (8-1 and 8-2); the lower stator lobe (2) comprises a lower machine base (4), a plurality of stator tooth iron cores (6) and two temperature sensors (8-1 and 8-2).
3. A modular stator for an annular permanent magnet machine according to claim 2, characterized in that:
the upper machine base (3) comprises a stator core mounting plate (301), an upper shell side wall (302), an end connecting plate (303), a machine base inner reinforcing plate (304), a reinforcing steel pipe (305) and a lifting lug base (306);
the lower machine base (4) comprises a lower machine shell side wall (401), an anchor bolt mounting plate (402), a stator core mounting plate (301), an end connecting plate (303), a machine base inner reinforcing plate (304), a reinforcing steel pipe (305) and a lifting lug base (306).
4. A modular stator for an annular permanent magnet machine according to claim 3, characterized in that: the inner circle surface of the stator core mounting plate (301) is provided with a plurality of through holes for mounting the stator tooth cores (6); the stator tooth iron core (6) is fixedly arranged on the stator iron core mounting plate (301) through a stator tooth iron core fastener (10).
5. The modular stator for an annular permanent magnet electric machine of claim 4, wherein:
the outer surface of the stator core mounting plate (301) is provided with three upper shell side walls (302), and a certain distance is reserved between two ends of each upper shell side wall (302) and used for welding an end connecting plate (303); a plurality of inner engine base reinforcing plates (304) are arranged between the side walls (302) of the upper engine shell and are distributed in a divergent manner at intervals of 15 degrees along the radial direction;
wherein, a plurality of through holes are arranged on the side wall (302) of the upper shell at equal angles and used for installing a reinforcing steel pipe (305).
6. A modular stator for an annular permanent magnet machine according to claim 5, characterized in that:
the surface of the end connecting plate (303) is provided with a plurality of spot-facing holes, and the spot-facing holes are used for mounting connecting plate fasteners (9); the side surface of the adjacent end part connecting plate (303) is provided with a seam riding pin hole for installing a seam riding pin (11);
the seam crossing pin (11) is positioned between the adjacent end connecting plates (303), and during assembly, the seam crossing pin (11) is clamped in the half smooth hole of one end connecting plate (303), and then the half smooth hole of the other end connecting plate (303) is clamped on the seam crossing pin (11).
7. A modular stator for an annular permanent magnet machine according to claim 1, characterized in that: wherein, the outer sides of the shell side walls of the upper machine base (3) and the lower machine base (4) are provided with lug seats (306); the lifting lug seat (306) is provided with a threaded hole, and the lifting ring is arranged on the threaded hole and used for horizontally lifting the base.
8. The modular stator for an annular permanent magnet electric machine of claim 7, wherein: the stator tooth iron cores (6) are in modular design, each stator tooth iron core (6) is a module unit, and a plurality of modular stator tooth iron cores (6) are sequentially spliced on a stator iron core mounting plate (301) of the base to be assembled into a single stator lobe;
the stator tooth iron core (6) comprises stator tooth punching sheets (601), stator iron core fixing keys (602), stator iron core pressing plates (603), stator insulation end plates (604) and winding coils (605);
the stator tooth iron core (6) is formed by laminating, riveting, fastening and welding a plurality of sector stator tooth punching sheets (601) in a segmented manner; a key groove is formed in the middle of the stator tooth punching sheet (601), and welding seam grooves are formed in two sides of the stator tooth punching sheet;
the stator core pressing plates (603) are positioned at two ends of the stator tooth punching sheets (601), one end of the stator core fixing key (602) sequentially penetrates through the stator core pressing plates (603) and the stator tooth punching sheets (601) at the two ends, and the two ends are welded and fixed;
the stator insulation end plates (604) are positioned at two ends of the stator tooth iron core (6);
the winding coil (605) is formed by winding a plurality of turns of copper wires.
9. The modular stator for an annular permanent magnet electric machine of claim 8, wherein: the bottom of the lower base (4) is provided with a foundation bolt mounting plate (402) for mounting a foundation bolt; and the side wall (401) of the lower shell is provided with a gap which is used as an operation space for screwing the foundation bolt.
10. The modular stator for an annular permanent magnet electric machine of claim 9, wherein: the end face connecting plate fastener (9) comprises a hexagon bolt, a flat washer, a spring washer and a nut; the stator tooth iron core fastener (10) comprises an inner hexagonal socket head cap screw, a flat washer and a spring washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211186259.0A CN115296453A (en) | 2022-09-28 | 2022-09-28 | Modular stator for annular permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211186259.0A CN115296453A (en) | 2022-09-28 | 2022-09-28 | Modular stator for annular permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115296453A true CN115296453A (en) | 2022-11-04 |
Family
ID=83833770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211186259.0A Pending CN115296453A (en) | 2022-09-28 | 2022-09-28 | Modular stator for annular permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115296453A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119362741A (en) * | 2024-12-23 | 2025-01-24 | 苏州一桥传动设备有限公司 | Motor stator frame and assembly process thereof |
| CN119813578A (en) * | 2025-01-16 | 2025-04-11 | 招商局工业智能科技(江苏)有限公司 | Marine shaft generator with three-half structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203522355U (en) * | 2013-11-06 | 2014-04-02 | 山西华鑫图科电机驱动有限公司 | Splicing permanent magnet motor stator structure |
| CN103825377A (en) * | 2012-11-15 | 2014-05-28 | 三菱电机株式会社 | Stator |
| CN107086717A (en) * | 2017-06-05 | 2017-08-22 | 溧水县得瑞微型电机厂 | A kind of motor shock absorption seat for being easy to lift |
| CN109639016A (en) * | 2018-12-25 | 2019-04-16 | 重庆赛力盟电机有限责任公司 | A kind of permanent magnet motor stator segment separator structure |
| CN111064324A (en) * | 2020-01-03 | 2020-04-24 | 珠海格力电器股份有限公司 | Wireless temperature sensor and assembly thereof, motor and air conditioner |
| CN114825690A (en) * | 2022-05-13 | 2022-07-29 | 江苏中工高端装备研究院有限公司 | Gearless direct-drive annular permanent magnet synchronous motor for ball mill |
-
2022
- 2022-09-28 CN CN202211186259.0A patent/CN115296453A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825377A (en) * | 2012-11-15 | 2014-05-28 | 三菱电机株式会社 | Stator |
| CN203522355U (en) * | 2013-11-06 | 2014-04-02 | 山西华鑫图科电机驱动有限公司 | Splicing permanent magnet motor stator structure |
| CN107086717A (en) * | 2017-06-05 | 2017-08-22 | 溧水县得瑞微型电机厂 | A kind of motor shock absorption seat for being easy to lift |
| CN109639016A (en) * | 2018-12-25 | 2019-04-16 | 重庆赛力盟电机有限责任公司 | A kind of permanent magnet motor stator segment separator structure |
| CN111064324A (en) * | 2020-01-03 | 2020-04-24 | 珠海格力电器股份有限公司 | Wireless temperature sensor and assembly thereof, motor and air conditioner |
| CN114825690A (en) * | 2022-05-13 | 2022-07-29 | 江苏中工高端装备研究院有限公司 | Gearless direct-drive annular permanent magnet synchronous motor for ball mill |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119362741A (en) * | 2024-12-23 | 2025-01-24 | 苏州一桥传动设备有限公司 | Motor stator frame and assembly process thereof |
| CN119362741B (en) * | 2024-12-23 | 2025-03-21 | 苏州一桥传动设备有限公司 | A motor stator frame and assembly process thereof |
| CN119813578A (en) * | 2025-01-16 | 2025-04-11 | 招商局工业智能科技(江苏)有限公司 | Marine shaft generator with three-half structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115296453A (en) | Modular stator for annular permanent magnet motor | |
| US8791616B2 (en) | Electric machine with axial flux and permanent magnets | |
| US20110080068A1 (en) | Laminated generator rotor structure and related method | |
| CN105515230A (en) | Stator of generator | |
| WO2007066793A1 (en) | Dynamo-electric machine | |
| US4227109A (en) | System for providing uniform axial expansion of a stator core | |
| CN102005867B (en) | Manufacturing method and assembly method of split independent large AC motor stator | |
| DK177374B1 (en) | Cooling structure for a segmented stator assembly | |
| MX2008010802A (en) | Compact high power alternator. | |
| US12294254B2 (en) | Mechanical strength of connection of wound rotor generator/motor | |
| US6501201B1 (en) | Generator rotor lead path configuration | |
| CN220673483U (en) | Novel shipbuilding axle-holding type electric excitation axle generator | |
| CN108155738B (en) | End ring structural unit, end ring and generator | |
| WO2013003985A1 (en) | Large-scale disc-type multi-stator permanent-magnet direct-drive wind generator set | |
| EP3800349B1 (en) | Busbar arrangement for wind turbine generator | |
| WO2014080183A1 (en) | Axial air gap electrical machine | |
| US20040061409A1 (en) | Method for making electrical stator and stator made by same | |
| CN207321074U (en) | More rotor multiple stators iron-core less motor stator structures | |
| CN105449971B (en) | A kind of compensation end line for direct current generator divides valve conjunction structure | |
| CN211606225U (en) | Flat wire stator structure | |
| CN103250328B (en) | dynamo | |
| CN115362621A (en) | Retaining systems for busbars on stators or stator segments of electric machines | |
| CN212258739U (en) | Mounting structure of motor duplex winding stator | |
| CN222721194U (en) | Permanent magnet axle-locking axle-belt generator | |
| CN217240414U (en) | Motor stator and axial flux motor thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221104 |