CN109980819A - A kind of inner rotator of permanent magnet synchronous motor - Google Patents

Abstract

The present invention relates to permanent magnet motor technical fields, specially a kind of inner rotator of permanent magnet synchronous motor, including rotor core and stator module, the outer surface of the rotor core is provided with the groove of annular spread, the side of the rotor core offers the magnetic slot of annular spread, the inner wall of the magnetic slot is provided with elastic slice, the inner wall of the magnetic slot is plugged with permanent magnet, the elastic slice is contacted with permanent magnet, the rotor core is internally provided with the cavity being connected to magnetic slot, the inner wall of the cavity is rotatably connected to shaft, one end of the shaft runs through rotor core and extends to the outside of rotor core, the side of the rotor core offers the card slot of annular spread.The present invention, which is solved, pours into gap or external addition plug using glue, internal temperature is higher in the magneto course of work, it is easy to make glue degumming that magnet steel etc. be caused to shake, so that magnetic flux leakage occur, and vibration can cause to damage to permanent magnet itself, influence its magnetic problem.

Description

An inner rotor of a permanent magnet synchronous motor

technical field

The invention relates to the technical field of permanent magnet motors, in particular to an internal rotor of a permanent magnet synchronous motor.

Background technique

The permanent magnet synchronous motor is excited by permanent magnets and does not require excitation winding and excitation power supply, which can improve the power factor and simplify the motor structure. At the same time, because there is no excitation winding in the rotor, there is no rotor loss during stable operation, eliminating the need for excitation device Therefore, the permanent magnet motor has the advantages of high efficiency, simple cooling and more reliable operation. At the same time, the permanent magnet excitation can also increase the air gap magnetic density of the motor, which is conducive to reducing the size and weight of the motor and making the structure of the motor more compact. .

In the actual use process, the embedded rotor core is mostly inserted into the magnetic steel slot directly when the permanent magnet is installed, and then glue is poured into the gap or the external blockage is added. The working process of the permanent magnet motor The internal temperature is relatively high in the middle, it is easy to make the glue degummed and cause the magnetic steel to shake, thereby causing magnetic leakage, and the vibration will cause damage to the permanent magnet itself and affect its magnetic properties. Motor rotor and motor. The motor rotor has the effect of fixing and damping the permanent magnet through the shrapnel. Since the shrapnel is an elastic member, when the motor rotor rotates, a large centrifugal force will be generated. Under the action of centrifugal force, the permanent magnet The shrapnel will be squeezed, and when the motor is collided, the permanent magnet will also squeeze the shrapnel, and the shrapnel will be easily deformed, which will easily cause the permanent magnet to shift. Therefore, those skilled in the art provide a permanent magnet synchronous motor. , to solve the problems raised in the above background art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an internal rotor of a permanent magnet synchronous motor to solve the problems raised in the above background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: an internal rotor of a permanent magnet synchronous motor, comprising a rotor iron core and a stator assembly, the outer surface of the rotor iron core is provided with annularly distributed grooves, and the rotor iron One side of the core is provided with an annularly distributed magnetic steel slot, the inner wall of the magnetic steel slot is provided with an elastic sheet, the inner wall of the magnetic steel slot is inserted with a permanent magnet, the elastic sheet is in contact with the permanent magnet, and the rotor core The interior of the rotor is provided with a cavity communicating with the magnetic steel slot, the inner wall of the cavity is rotatably connected with a rotating shaft, one end of the rotating shaft penetrates the rotor core and extends to the outside of the rotor core, and one side of the rotor core is There are annularly distributed card slots, one end of the rotating shaft is fixedly connected with a clip, the clip matches the card slot, the surface of the rotating shaft is sleeved with a cam located inside the cavity, and the cam slides with the rotating shaft The inner wall of the cavity is provided with a bead that is in contact with the permanent magnet, the cam is movably connected to the bead, and an end plate is provided on one side of the rotor core.

As a further solution of the present invention: the stator assembly includes a stator iron core, the inner wall of the stator iron core is provided with annularly distributed winding slots, and the number of winding slots is set to nine, and the inner wall of the winding slot is provided with stator windings .

As a further solution of the present invention: the grooves are provided with eight, and the rotor iron core is in the shape of a petal as a whole.

As a further solution of the present invention, the number of the magnetic steel grooves is eight groups, the number of the magnetic steel grooves in each group is two, and the magnetic steel grooves in each group are arranged in a figure-eight shape.

As a further solution of the present invention, a chute is provided on the outer side of the rotating shaft, a sliding block is fixedly connected to the inner wall of the cam, and the sliding block is matched with the chute.

As a further solution of the present invention, a buffer groove is provided on the side of the bead close to the permanent magnet.

As a further solution of the present invention, one end of the rotating shaft facing away from the clip is rotatably connected to the limiting seat, and the rotating shaft is slidably connected to the limiting seat.

Compared with the prior art, the beneficial effects of the present invention are:

By setting the shrapnel, when the permanent magnet is installed, after the permanent magnet is inserted into the magnetic steel slot, the shrapnel will support the permanent magnet, and can buffer the vibration received during the rotation of the permanent magnet, reducing its contact with the magnetic steel. The impact between the grooves and the clip rotate at the same time. When the clip rotates, it drives the shaft to rotate, and the rotation of the shaft drives the cam to rotate. At this time, the cam pushes the pressure strip to move, so that the pressure strip can withstand the permanent magnet, so that the permanent magnet will not easily shake. , and then press the clip to make the clip completely inside the slot, and finally install the end plate on the rotor core to prevent the clip from leaving the slot, so that the shaft cannot rotate, and the cam always keeps the clip tight. In this way, the fixing effect of the permanent magnet is better, which solves the problem of using glue to pour into the gap or adding a blockage outside. The internal temperature of the permanent magnet motor is relatively high during the working process, which is easy to degumming the glue and cause the magnetic steel to shake, which occurs Magnetic leakage phenomenon, and vibration will cause damage to the permanent magnet itself, affecting its magnetic properties.

Description of drawings

Fig. 1 is the structural representation of the inner rotor of a kind of permanent magnet synchronous motor;

Fig. 2 is a front view of the inner rotor of a permanent magnet synchronous motor;

3 is a schematic structural diagram of a rotor core in an internal rotor of a permanent magnet synchronous motor;

4 is a side view of a rotor core in an inner rotor of a permanent magnet synchronous motor;

5 is a schematic structural diagram of a cam in the inner rotor of a permanent magnet synchronous motor;

Fig. 6 is an enlarged view of the inner rotor of Fig. 3 at A of a permanent magnet synchronous motor;

FIG. 7 is an enlarged view of the inner rotor of FIG. 4 at B of a permanent magnet synchronous motor.

In the figure: 1, rotor core; 2, stator assembly; 3, groove; 4, magnetic steel slot; 5, shrapnel; 6, permanent magnet; 7, cavity; 8, shaft; 9, card slot; 10, Clip; 11, cam; 12, bead; 13, chute; 14, slider; 15, buffer groove; 16, end plate.

Detailed ways

Example 1

Referring to FIGS. 1 to 7 , in an embodiment of the present invention, an internal rotor of a permanent magnet synchronous motor includes a rotor iron core 1 and a stator assembly 2 . The stator assembly 2 includes a stator iron core, and the inner wall of the stator iron core is provided with a ring shape. Distributed winding slots, and the number of winding slots is set to nine, the inner wall of the winding slot is provided with stator windings, the outer surface of the rotor core 1 is provided with annularly distributed grooves 3, and one side of the rotor core 1 is provided with annularly distributed grooves 3. The magnetic steel slot 4, the inner wall of the magnetic steel slot 4 is provided with an elastic sheet 5, the inner wall of the magnetic steel slot 4 is inserted with a permanent magnet 6, the elastic sheet 5 is in contact with the permanent magnet 6, and the interior of the rotor core 1 is provided with a magnetic steel slot 4. The connected cavity 7, the inner wall of the cavity 7 is rotatably connected with a rotating shaft 8, one end of the rotating shaft 8 penetrates the rotor core 1 and extends to the outside of the rotor core 1, and one side of the rotor core 1 is provided with annularly distributed card slots 9. One end of the rotating shaft 8 is fixedly connected with a clamping strip 10, the clamping strip 10 is matched with the clamping groove 9, the surface of the rotating shaft 8 is sleeved with a cam 11 located inside the cavity 7, the cam 11 is slidably connected with the rotating shaft 8, and the cavity 7 The inner wall of the rotor core 1 is provided with a bead 12 in contact with the permanent magnet 6 , the cam 11 is movably connected with the bead 12 , and an end plate 16 is provided on one side of the rotor core 1 .

In this embodiment, when the permanent magnet 6 is installed, after the permanent magnet 6 is inserted into the magnetic steel slot 4, the elastic piece 5 will support the permanent magnet 6, and can buffer the vibration received during the rotation of the permanent magnet 6, Reduce the impact between it and the magnetic steel groove 4, and rotate the clip 10 at the same time. When the clip 10 rotates, it drives the rotating shaft 8 to rotate, and the rotation of the rotating shaft 8 drives the cam 11 to rotate. The permanent magnet 6 is held up, so that the permanent magnet 6 will not easily shake, and then the clip 10 is pressed so that the clip 10 is completely placed inside the slot 9, and finally the end plate 16 is installed on the rotor core 1, that is, The clamping strip 10 can be prevented from being separated from the clamping slot 9, so that the rotating shaft 8 cannot be rotated, and the cam 11 always keeps the pressure strip 12 in a tight state, thereby making the fixing effect of the permanent magnet 6 better. Blockage, the internal temperature of the permanent magnet motor is high during the working process, it is easy to make the glue degummed and cause the magnetic steel to shake, thereby causing magnetic leakage, and the vibration will cause damage to the permanent magnet 6 itself, affecting its magnetic properties.

Example 2

Further improvements are made on the basis of Embodiment 1. Please refer to Figures 1 to 7. The number of magnetic steel slots 4 is eight groups, and the number of each group of magnetic steel slots 4 is two, and each group of magnetic steel slots 4 is in the shape of two. The eight-shaped arrangement, the grooves 3 are provided with eight, the rotor core 1 is in the shape of a petal as a whole, and the grooves 3 and the rotor core 1 together form a petal shape, which can effectively reduce the cogging torque of the rotor core 1 , and convert the rotor of the motor into an eccentric rotor, so that the performance of the motor is better.

The outer side of the rotating shaft 8 is provided with a chute 13, the inner wall of the cam 11 is fixedly connected with a slider 14, the slider 14 is matched with the chute 13, and the slider 14 slides on the inner wall of the chute 13, so that the rotating shaft 8 drives the cam When the 11 rotates, the rotating shaft 8 can slide on the inner wall of the cam 11 , so that the clip 10 can be completely placed inside the clip slot 9 .

Wherein, a buffer groove 15 is opened on the side of the bead 12 close to the permanent magnet 6. The bead 12 can be made of an elastic material, specifically heat-resistant rubber. The buffer groove 15 can buffer the vibration of the permanent magnet 6 and reduce the Loss of permanent magnet 6 .

In addition, the end of the rotating shaft 8 away from the clip 10 is rotatably connected to the limiting seat, and the rotating shaft 8 is slidably connected to the limiting seat. When the rotating shaft 8 is pressed, the limiting seat limits the position of the rotating shaft 8 to prevent it from tilting.

The working principle of the present invention is as follows: when the permanent magnet 6 is installed, after the permanent magnet 6 is inserted into the magnetic steel groove 4, the elastic piece 5 will support the permanent magnet 6, and can protect the permanent magnet 6 against the The vibration is buffered to reduce the impact between it and the magnetic steel groove 4, and the clip 10 is rotated at the same time. When the clip 10 rotates, the rotating shaft 8 is driven to rotate, and the rotation of the rotating shaft 8 drives the cam 11 to rotate. At this time, the cam 11 pushes the pressure strip 12 to move, Make the pressing bar 12 stand against the permanent magnet 6, so that the permanent magnet 6 will not easily shake, then press the clip 10, so that the clip 10 is completely placed inside the slot 9, and finally install the end plate 16 to the rotor core 1, the clip 10 can be prevented from being separated from the clip slot 9, so that the shaft 8 cannot be rotated, and the cam 11 always keeps the pressing strip 12 in a tight state, so that the fixing effect of the permanent magnet 6 is better, which solves the problem of using glue to fill the gap. Or add a blockage externally, the internal temperature of the permanent magnet motor is high during the working process, it is easy to make the glue degummed and cause the magnetic steel to shake, resulting in magnetic leakage phenomenon, and the vibration will cause damage to the permanent magnet 6 itself, affecting its magnetic properties. question.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The equivalent replacement or modification of its inventive concept shall be included within the protection scope of the present invention.

Claims (7)

1. an internal rotor of a permanent magnet synchronous motor, comprising a rotor core (1) and a stator assembly (2), characterized in that the outer surface of the rotor core (1) is provided with annularly distributed grooves (3) ), one side of the rotor core (1) is provided with an annularly distributed magnetic steel slot (4), the inner wall of the magnetic steel slot (4) is provided with an elastic sheet (5), and the magnetic steel slot (4) A permanent magnet (6) is inserted into the inner wall of the rotor, the elastic sheet (5) is in contact with the permanent magnet (6), and a cavity (7) communicated with the magnetic steel slot (4) is provided inside the rotor core (1). ), the inner wall of the cavity (7) is rotatably connected with a rotating shaft (8), and one end of the rotating shaft (8) penetrates the rotor iron core (1) and extends to the outside of the rotor iron core (1). One side of the core (1) is provided with annularly distributed clamping grooves (9), one end of the rotating shaft (8) is fixedly connected with a clamping strip (10), and the clamping strip (10) is matched with the clamping groove (9) , the surface of the rotating shaft (8) is sleeved with a cam (11) located inside the cavity (7), the cam (11) is slidably connected with the rotating shaft (8), and the inner wall of the cavity (7) is provided with A bead (12) in contact with the permanent magnet (6), the cam (11) is movably connected with the bead (12), and an end plate (16) is provided on one side of the rotor core (1). 2 . The inner rotor of a permanent magnet synchronous motor according to claim 1 , wherein the stator assembly ( 2 ) comprises a stator iron core, and the inner wall of the stator iron core is provided with annularly distributed winding slots. 3 . , and the number of winding slots is set to nine, and the inner walls of the winding slots are provided with stator windings. 3 . The inner rotor of a permanent magnet synchronous motor according to claim 1 , wherein there are eight grooves ( 3 ) provided, and the rotor iron core ( 1 ) is in the shape of a petal as a whole. 4 . 4. The inner rotor of a permanent magnet synchronous motor according to claim 1, wherein the number of the magnetic steel grooves (4) is eight groups, and the number of the magnetic steel grooves (4) in each group is equal to There are two magnet steel grooves (4) in each group, and they are arranged in a figure-eight shape. 5. The inner rotor of a permanent magnet synchronous motor according to claim 1, wherein a chute (13) is provided on the outer side of the rotating shaft (8), and the inner wall of the cam (11) is fixedly connected with a A sliding block (14), the sliding block (14) is matched with the chute (13). 6 . The inner rotor of a permanent magnet synchronous motor according to claim 1 , wherein a buffer groove ( 15 ) is provided on the side of the bead ( 12 ) close to the permanent magnet ( 6 ). 7 . 7. The inner rotor of a permanent magnet synchronous motor according to claim 1, characterized in that, one end of the shaft (8) facing away from the clip (10) is rotatably connected to a limit seat, and the shaft (8) is connected to a limit seat. Limit seat sliding connection.