CN218920075U - Stator fractional slot permanent magnet synchronous piezoelectric motor - Google Patents

Abstract

The utility model discloses a stator fractional slot permanent magnet synchronous low-voltage motor which comprises a stator core, a motor shell and a fixed base, wherein the stator core is arranged on the inner wall of the motor shell, the fixed base is arranged at the bottom of the motor shell, and the rotor core is arranged on the inner wall of the stator core. The utility model provides a stator fractional slot permanent magnet synchronous low-voltage motor, which uses fractional slots to be applied to the permanent magnet synchronous low-voltage motor, and by matching the selected slot number and pole number, and matching with a proper short-distance double-layer lap winding, compared with an asynchronous machine with the same specification, the stator fractional slot permanent magnet synchronous low-voltage motor has the advantages that the efficiency is improved by more than 4 percent, compared with Y2, the angle between the magnetic pole and the slot of the permanent magnet synchronous low-voltage motor can be staggered at each operating angle, so that the stator chute can be reduced to the minimum, even no chute is used, the winding coefficient is greatly improved, the material utilization rate is also improved, the manufacturability is also improved, and the motor operates more stably.

Description

Stator fractional slot permanent magnet synchronous piezoelectric motor

Technical Field

The utility model relates to the technical field of low-voltage motor equipment, in particular to a stator fractional slot permanent magnet synchronous low-voltage motor.

Background

Generally, the stators of the conventional small-sized generators or motors are all integer slots, only the large-sized generators or motors use fractional slots, and the fractional slots of the stators of the prior art motors are all applied to high-voltage motors.

The permanent magnet synchronous motor in the prior art has the defects that:

patent document CN204992988U discloses a permanent magnet synchronous motor, a stator consisting of a housing and a coil holder located inside the housing and including a coil; and a rotor coupled to a rotor shaft penetrating the housing, the rotor including an inner rotor core for disposing a permanent magnet, an outer rotor fixing plate coupled to the rotor shaft at a predetermined interval from the inner rotor core, and an outer rotor core provided to the outer rotor fixing plate and facing the permanent magnet at a predetermined interval. The permanent magnet synchronous motor can reduce iron loss, improve efficiency, reduce the burden of a cooling system, and improve the speed of the motor without weak field control in a constant power operation interval.

The permanent magnet synchronous motor disclosed in the above publication mainly considers how to solve the problems that the speed of the motor can be increased without weak field control, the existing stator fractional slot permanent magnet synchronous motor is large in general volume, low in efficiency and large in pulsation, and magnetic flux short circuit can occur during working.

In view of this, it is necessary to develop a stator fractional slot permanent magnet synchronous motor which can achieve the effects of small volume, high efficiency, small pulsation, and prevention of magnetic flux short circuit.

Disclosure of Invention

The utility model aims to provide a stator fractional slot permanent magnet synchronous motor, which solves the problems of large volume, low efficiency, large pulsation and magnetic flux short circuit during working, which are generally proposed in the background art.

In order to achieve the above purpose, the utility model provides a technical scheme that the stator fractional slot permanent magnet synchronous motor comprises a stator core, a motor shell and a fixed base, wherein the stator core is arranged on the inner wall of the motor shell, and the fixed base is arranged at the bottom of the motor shell;

a rotor core is arranged on the inner wall of the stator core, and a plurality of magnetic grade grooves are formed in the section of the stator core;

the inner wall of the rotor core is embedded with a plurality of permanent magnet poles, the inner wall of the rotor core is provided with a rotating shaft, and the outer wall of the rotating shaft is provided with a fan assembly.

Preferably, a fixed plate is arranged on one side of the motor shell, a first bearing is arranged in the middle of one side of the fixed plate, the inner wall of the first bearing is arranged on the outer wall of the rotating shaft, a plurality of first mounting holes are arranged on the periphery of one side of the fixed plate, and a ventilation plate is arranged on the other end of the motor shell through bolts.

Preferably, a plurality of second mounting holes are formed in the bottom of the fixing base, fixing screws are mounted on the inner walls of the second mounting holes, and first through holes are formed in the top of the fixing base.

Preferably, one side of the ventilation plate is provided with a plurality of ventilation holes, the middle part of the other side of the ventilation plate is provided with a mounting groove, the inner wall of the mounting groove is provided with a second bearing, and the inner wall of the second bearing is arranged at the other end of the rotating shaft.

Preferably, the outer wall of the motor housing is provided with a plurality of second through holes, the inner wall of each second through hole is provided with a dust filter screen, the inner wall of the motor housing is provided with a plurality of fixing blocks, one ends of the fixing blocks are arranged on the outer wall of the stator core, and the bottom of the motor housing is provided with two groups of limiting holes.

Preferably, the outer wall of unable adjustment base has seted up a plurality of restriction groove, and pressure spring is installed to the inner wall in restriction groove, and limit piece is installed to pressure spring's inner wall, and one side of limit piece outer wall is installed in the inner wall in restriction hole, and the ejector pad is installed to limit piece's one end.

Preferably, the dead lever is installed to the one end of ejector pad, and the restriction pole is installed to the inner wall of dead lever one end, and the one end of restriction pole is installed in unable adjustment base's outer wall, and the fixed slot is installed to the other end of dead lever, and the one end of fixed slot is installed in unable adjustment base's outer wall.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model provides a stator fractional slot permanent magnet synchronous low-voltage motor, which uses fractional slots to be applied to the permanent magnet synchronous low-voltage motor, and by matching the selected slot number and pole number, and matching with a proper short-distance double-layer lap winding, compared with an asynchronous machine with the same specification, the stator fractional slot permanent magnet synchronous low-voltage motor has the advantages that the efficiency is improved by more than 4 percent, compared with Y2, the angle between the magnetic pole and the slot of the permanent magnet synchronous low-voltage motor can be staggered at each operating angle, so that a stator chute can be reduced to the minimum, even no chute is used, the winding coefficient is greatly improved, the material utilization rate is also improved, the manufacturability is also enhanced, the motor operates more stably, the size is further reduced, the efficiency is high, the pulsation is small, and the effect of preventing magnetic flux from short circuit is achieved.

2. According to the permanent magnet synchronous low-voltage motor, the rotating shaft, the fan assembly, the ventilation holes, the mounting groove and the second bearing are arranged, the fan assembly is driven to rotate by rotating the rotating shaft, external air is absorbed into the motor shell through the ventilation holes, and the air entering the motor shell is discharged through the second through holes through the arrangement of the second through holes, the dust filter screen and the fixing block, so that the effect of heat dissipation and cooling is achieved in the use process of the permanent magnet synchronous low-voltage motor.

3. According to the utility model, through the arrangement of the fixed base, the second mounting hole, the fixed screw, the limiting groove, the pressure spring, the limiting block, the limiting hole, the pushing block, the fixed plate, the limiting rod and the fixed groove, the limiting rod in the fixed groove is moved, so that the limiting rod does not block the pushing block to move, the limiting block and the pushing block are pushed to move by the elastic force of the pressure spring, and the limiting block moves to be separated from the inner wall of the limiting hole, so that a motor shell is conveniently taken out from the inner wall of the fixed base by a person.

Drawings

FIG. 1 is a perspective view of the overall structure of the present utility model;

FIG. 2 is a schematic view of a stator core structure according to the present utility model;

FIG. 3 is a schematic view of the motor housing of the present utility model;

FIG. 4 is a schematic view of a ventilating board structure according to the present utility model;

FIG. 5 is a schematic view of a limiting groove structure of the present utility model.

In the figure: 1. a stator core; 2. a motor housing; 3. a fixed base; 101. a rotor core; 102. a magnetic stage groove; 103. a permanent magnet pole; 104. a rotating shaft; 105. a fan assembly; 201. a fixing plate; 202. a first bearing; 203. a first mounting hole; 204. a ventilation plate; 301. a second mounting hole; 302. a set screw; 303. a first through hole; 401. ventilation holes; 402. a mounting groove; 403. a second bearing; 501. a second through hole; 502. a dust filter screen; 503. a fixed block; 504. limiting the aperture; 601. a limiting groove; 602. a pressure spring; 603. a limiting block; 604. a pushing block; 701. a fixed rod; 702. a restraining bar; 703. a fixing groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. 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 utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be 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 utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, in an embodiment of the present utility model, a stator fractional slot permanent magnet synchronous motor includes a stator core 1, a motor housing 2 and a fixing base 3, wherein the inner wall of the motor housing 2 is provided with the stator core 1, and the bottom of the motor housing 2 is provided with the fixing base 3;

referring to fig. 2, a rotor core 101 is installed on the inner wall of a stator core 1, a plurality of magnetic grade grooves 102 are arranged on the section of the stator core 1, a plurality of permanent magnet poles 103 are embedded and installed on the inner wall of the rotor core 101, a rotating shaft 104 is installed on the inner wall of the rotor core 101, and a fan component 105 is installed on the outer wall of the rotating shaft 104;

referring to fig. 1, 2, 3 and 4, a fixing plate 201 is installed at one side of a motor housing 2, a first bearing 202 is installed at the middle of one side of the fixing plate 201, the inner wall of the first bearing 202 is installed at the outer wall of a rotating shaft 104, a plurality of first installation holes 203 are installed at the periphery of one side of the fixing plate 201, a ventilation plate 204 is installed at the other end of the motor housing 2 through bolts, a plurality of ventilation holes 401 are formed at one side of the ventilation plate 204, an installation groove 402 is formed at the middle of the other side of the ventilation plate 204, a second bearing 403 is installed at the inner wall of the installation groove 402, the inner wall of the second bearing 403 is installed at the other end of the rotating shaft 104, a plurality of second through holes 501 are formed at the outer wall of the motor housing 2, a dust filter screen 502 is installed at the inner wall of the second through holes 501, a plurality of fixing blocks 503 are arranged on the inner wall of the motor housing 2, one end of each fixing block 503 is arranged on the outer wall of the stator core 1, two groups of limiting holes 504 are formed in the bottom of the motor housing 2, the fan assembly 105, the ventilation holes 401, the mounting grooves 402 and the second bearings 403 are arranged, the fan assembly 105 is driven to rotate by rotation of the rotating shaft 104, the fan assembly 105 absorbs external air into the motor housing 2 through the ventilation holes 401, and the air entering the motor housing 2 is discharged through the plurality of second through holes 501 through the arrangement of the second through holes 501, the dust filter screen 502 and the fixing blocks 503, so that the effect of heat dissipation and cooling in the use process of the permanent magnet synchronous low-voltage motor is achieved;

referring to fig. 1, 2 and 5, a plurality of second mounting holes 301 are formed at the bottom of the fixing base 3, fixing screws 302 are mounted on the inner wall of the second mounting holes 301, a first through hole 303 is formed at the top of the fixing base 3, a plurality of limiting grooves 601 are formed on the outer wall of the fixing base 3, a pressure spring 602 is mounted on the inner wall of the limiting grooves 601, a limiting block 603 is mounted on the inner wall of the limiting hole 504 on one side of the outer wall of the limiting block 603, a push block 604 is mounted on one end of the limiting block 603, a fixing rod 701 is mounted on one end of the push block 604, a limiting rod 702 is mounted on the inner wall of one end of the fixing rod 701, one end of the limiting rod 702 is mounted on the outer wall of the fixing base 3, the fixed slot 703 is installed to the other end of dead lever 701, and the one end of fixed slot 703 is installed in the outer wall of unable adjustment base 3, through unable adjustment base 3, the second mounting hole 301, set screw 302, the setting of limit groove 601, compression spring 602, restriction piece 603, restriction hole 504, ejector pad 604, dead lever 701, restriction pole 702 and fixed slot 703, the inside restriction pole 702 of removal dead lever 703 makes restriction pole 702 no longer block ejector pad 604 and removes, the elasticity of compression spring 602 promotes restriction piece 603 and ejector pad 604 and removes, restriction piece 603 removes the inner wall that breaks away from restriction hole 504, and then make things convenient for the personnel to take out motor housing 2 from the inner wall of unable adjustment base 3.

The working principle of the utility model is that the fractional slot is used in the permanent magnet synchronous low-voltage motor, through the matching of the selected slot number and pole number, and the matching of the proper short-distance double-layer lap winding, compared with an asynchronous motor with the same specification, the stator fractional slot permanent magnet synchronous low-voltage motor has the advantages that the efficiency is improved by more than 4 percent, compared with Y2, the angle between the magnetic pole and the slot of the permanent magnet synchronous low-voltage motor can be staggered at each operating angle, therefore, the stator chute can be reduced to the minimum, even no chute is used, the winding coefficient is greatly improved, the material utilization rate is also improved, the manufacturability is also enhanced, the motor operates more stably, the fan assembly 105 is driven to rotate by the rotation of the rotating shaft 104 through the arrangement of the rotating shaft 104, the fan assembly 105, the ventilation holes 401, the mounting slots 402 and the second bearings 403, the fan assembly 105 rotates to absorb external air into the motor housing 2 through the ventilation hole 401, the air entering the motor housing 2 is discharged through the second through holes 501, the dust filter screen 502 and the fixed block 503, and then the air is cooled in the use process of the permanent magnet synchronous low-voltage motor, and the air enters the motor housing 2 to be cooled through the second through holes 501, the fixed base 3, the second mounting hole 301, the fixed screw 302, the limiting groove 601, the pressure spring 602, the limiting block 603, the limiting hole 504, the push block 604, the fixed rod 701, the limiting rod 702 and the fixed groove 703, the limiting rod 702 in the fixed groove 703 is moved, the limiting rod 702 does not block the push block 604 to move any more, the limiting block 603 and the push block 604 are pushed to move by the elasticity of the pressure spring 602, the limiting block 603 is moved away from the inner wall of the limiting hole 504, thereby facilitating the personnel to take out the motor housing 2 from the inner wall of the fixed base 3.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. The utility model provides a stator score groove permanent magnet synchronous motor, includes stator core (1), motor housing (2) and unable adjustment base (3), its characterized in that: the inner wall of the motor shell (2) is provided with a stator core (1), and the bottom of the motor shell (2) is provided with a fixed base (3);

a rotor core (101) is arranged on the inner wall of the stator core (1), and a plurality of magnetic grade grooves (102) are formed in the section of the stator core (1);

the inner wall gomphosis of rotor core (101) is installed a plurality of permanent magnet pole (103), pivot (104) are installed to the inner wall of rotor core (101), fan subassembly (105) are installed to the outer wall of pivot (104).

2. A stator fractional slot permanent magnet synchronous motor according to claim 1, wherein: a fixed plate (201) is arranged on one side of the motor housing (2), a first bearing (202) is arranged in the middle of one side of the fixed plate (201), the inner wall of the first bearing (202) is arranged on the outer wall of the rotating shaft (104), a plurality of first mounting holes (203) are formed in the periphery of one side of the fixed plate (201), and a ventilation plate (204) is arranged at the other end of the motor housing (2) through bolts.

3. A stator fractional slot permanent magnet synchronous motor according to claim 1, wherein: a plurality of second mounting holes (301) are formed in the bottom of the fixed base (3), fixing screws (302) are mounted on the inner walls of the second mounting holes (301), and first through holes (303) are formed in the top of the fixed base (3).

4. A stator fractional slot permanent magnet synchronous motor according to claim 2, wherein: a plurality of ventilation holes (401) are formed in one side of the ventilation plate (204), a mounting groove (402) is formed in the middle of the other side of the ventilation plate (204), a second bearing (403) is mounted on the inner wall of the mounting groove (402), and the inner wall of the second bearing (403) is mounted on the other end of the rotating shaft (104).

5. A stator fractional slot permanent magnet synchronous motor according to claim 1, wherein: the outer wall of motor housing (2) has seted up a plurality of second through-hole (501), and dust filter screen (502) are installed to the inner wall of second through-hole (501), and a plurality of fixed block (503) are installed to the inner wall of motor housing (2), and the one end of fixed block (503) is installed in the outer wall of stator core (1), and two sets of limiting holes (504) have been seted up to the bottom of motor housing (2).

6. A stator fractional slot permanent magnet synchronous motor according to claim 1, wherein: the outer wall of unable adjustment base (3) has seted up a plurality of restriction groove (601), and compression spring (602) are installed to the inner wall of restriction groove (601), and limited block (603) are installed to the inner wall of compression spring (602), and one side of restriction block (603) outer wall is installed in the inner wall of restriction hole (504), and ejector pad (604) are installed to one end of restriction block (603).

7. The stator fractional slot permanent magnet synchronous motor of claim 6 wherein: fixed lever (701) is installed to the one end of ejector pad (604), and restraining bar (702) is installed to the inner wall of fixed lever (701) one end, and the one end of restraining bar (702) is installed in the outer wall of unable adjustment base (3), and fixed slot (703) is installed to the other end of fixed lever (701), and the one end of fixed slot (703) is installed in the outer wall of unable adjustment base (3).

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