CN217642914U - Rotor segmentation pole-staggering permanent magnet motor - Google Patents

Abstract

The utility model discloses a rotor segmented pole-staggering permanent magnet motor, which comprises a rotor component, a stator component and a shell component, wherein the shell component is provided with a shell cavity for fixing the stator component; the stator component is provided with a stator cavity which is axially arranged, and a rotatable rotor component is arranged in the stator cavity; the rotor assembly comprises a plurality of sections of rotor cores and a plurality of magnetic steel combinations, and the rotor cores are axially segmented; the magnetic steel combination is formed by arranging a plurality of magnetic steels in a wide-opening U shape, and the magnetic steel combinations are embedded in magnetic steel grooves close to the outer side of the rotor core cylinder, and the openings of the magnetic steel combinations face the outer side; the magnetic steel combination is arranged on the adjacent sections of rotor cores in a staggered manner. The rotor core of the rotor segmented staggered-pole permanent magnet motor adopts a segmented structure, the permanent magnet adopts a magnetic steel combination formed by a plurality of magnetic steels and is embedded in the rotor core, the magnetic steels in adjacent segments of the rotor cores are combined in staggered-pole arrangement, the magnetic steel combination increases magnetic flux, and the staggered-pole arrangement structure reduces cogging torque, vibration and noise; the magnetic steel composite structure is convenient to assemble.

Description

Rotor segmentation pole-staggering permanent magnet motor

Technical Field

The utility model relates to a technical field of motor specifically is a rotor segmentation mistake utmost point permanent-magnet machine.

Background

The new energy motor is gradually applied to different vehicles instead of an internal combustion engine, and small and medium-sized steamships or pleasure boats of water vehicles also start to adopt the new energy motor as a power system. In the traditional motor, the linear magnetic steel is adhered to the surface of the rotor core, the magnetic flux formed by the linear magnetic steel is small, the cogging torque of the motor is large when the motor works, and the vibration and noise of the motor are large; the surface-mounted magnetic steel is inconvenient to mount and is not suitable for high-speed rotation.

Therefore, the above technical problems need to be solved.

Disclosure of Invention

The utility model provides a to above technical problem, provide a rotor segmentation mistake utmost point permanent-magnet machine, its rotor core adopts the structure of sectional type, and the permanent magnet adopts the magnet steel combination that a plurality of magnet steels formed, and the permanent magnet inlays in the rotor core, and the magnet steel combination mistake in the adjacent section rotor core sets up, and the magnet steel combination has increased the magnetic flux, and the mistake extremely sets up the structure and has reduced tooth's socket torque, vibration and noise; the embedded magnetic steel combination structure is convenient to assemble and is beneficial to high-speed rotation of the motor.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a rotor segmented pole-staggered permanent magnet motor comprises a rotor assembly, a stator assembly and a shell assembly, wherein the shell assembly is provided with a shell cavity for fixing the stator assembly; the stator component is provided with a stator cavity which is axially arranged, and a rotatable rotor component is arranged in the stator cavity;

the rotor assembly comprises a plurality of sections of rotor cores and a plurality of magnetic steel combinations, and the rotor cores are axially segmented; the magnetic steel combination is formed by arranging a plurality of magnetic steels in a wide-opening U shape, and a plurality of magnetic steel combinations are embedded in magnetic steel grooves close to the outer side of the rotor core cylinder and the openings of the magnetic steel combinations face the outer side; and the magnetic steel combinations are arranged on the adjacent sections of the rotor cores in a staggered manner.

The rotor core of the permanent magnet motor adopts a sectional type structure, the permanent magnet adopts a magnetic steel combination formed by a plurality of magnetic steels, the permanent magnet is embedded in the rotor core, the magnetic steel combinations in adjacent sections of the rotor cores are arranged in a staggered mode, the magnetic steel combinations increase the magnetic flux, and the staggered pole arrangement structure reduces the cogging torque, the vibration and the noise; the embedded magnetic steel combination structure is convenient to assemble and is beneficial to high-speed rotation of the motor.

Further the housing assembly includes an outer shell body having an axially reciprocating cooling channel therein, a first end cap and a second end cap; the first end cover is arranged at one end of the shell body, and the second end cover is arranged at the other end of the shell body; the cooling channel is connected with the first end cover and the second end cover in a sealing mode. The shell assembly is formed by fixing the first end cover and the second end cover at two ends of the shell body, the structure is simple, the assembly is convenient, the cooling channel is arranged on the shell body to take away heat on the stator assembly, and the heat dissipation and the stable operation of the motor are ensured.

The cooling channel further comprises a liquid inlet, a liquid outlet, a plurality of axial grooves and a plurality of connecting grooves; the plurality of axial grooves are distributed at intervals in the wall thickness of the shell body; the connecting grooves are positioned at two ends of the shell body, the connecting grooves are communicated with two adjacent axial grooves, the connecting grooves are arranged at the same end of the shell body at intervals, and the connecting grooves are staggered at two ends; the liquid inlet and the liquid outlet are respectively arranged at two adjacent axial grooves corresponding to the outer part of the shell body, and the connecting groove is not arranged between the two axial grooves corresponding to the liquid inlet and the liquid outlet. The cooling channel is formed by the axial grooves distributed in the wall thickness of the shell body, and the axial grooves are easy to form in the shell body, so that the production and the manufacture are convenient.

Furthermore, a positioning step is arranged on the inner wall of the shell body and is attached to one end of the stator assembly, a fixing ring is arranged at the other end of the stator assembly and is pressed and fixed through the second end cover; the inner wall of the shell body is provided with a plurality of axial grooves, the outer wall of the stator assembly is provided with a plurality of axial bulges, and the axial bulges are positioned in the axial grooves. Stator module passes through this internal location step of shell and solid fixed ring axial positioning in casing subassembly, has restricted stator module's axial displacement, and stator module's axial bulge has restricted stator module's rotatory removal in being located this internal axial groove of shell, and stator module is fixed in casing subassembly.

Further the rotor subassembly includes the pivot, rotor core passes through rotor punching stack dress and forms, rotor punching central point puts and has the shaft hole, the pivot passes the shaft hole setting, be equipped with protruding key-type connection on the shaft hole the pivot, protruding key both sides are equipped with the portion of keeping away the sky of pivot installation. The rotor core is manufactured by stacking the rotor punching sheets, so that the eddy current loss is reduced, and the processing of structures such as a magnetic steel groove, a shaft hole and the like on the rotor core is facilitated; the convex key on the shaft hole of the rotor core is equivalent to a flat key for installing the rotating shaft and is integrated on the shaft hole, so that the rotating shaft is convenient to install; because rotor core forms through rotor punching stack dress, the precision in shaft hole is not high, sets up and keeps away the installation that the portion is favorable to the pivot.

The shell assembly further comprises a first bearing and a second bearing, the first bearing and the second bearing are respectively fixed at two ends of the shell assembly, and the rotating shaft is fixedly connected to the first bearing and the second bearing. The provision of the first and second bearings facilitates rotation of the rotor assembly on the housing assembly.

The rotor core is further divided into three sections, one end of the rotor core is a first rotor core, the middle of the rotor core is a second rotor core, and the other end of the rotor core is a third rotor core. The segmented rotor core structure realizes the staggered arrangement of the magnetic steel combination in the adjacent rotor cores, is favorable for reducing the cogging torque, reducing the vibration noise, improving the sine degree of no-load electromotive force and reducing harmonic waves; the three-segment structure facilitates manufacture and assembly.

And the magnetic steel combination is composed of three magnetic steels. Compared with single linear magnetic steel, the magnetic steel combination formed by the three magnetic steels increases the magnetic flux, reduces the total eddy current loss of the magnetic steel and improves the air gap flux density waveform.

And further, magnetic isolation bridges are arranged on two sides of the magnetic steel in the magnetic steel combination on the rotor core. The magnetic isolation bridge has the functions of improving the weak magnetic capacity and increasing the speed regulation range; the structural strength of the rotor is improved, and the high-speed operation of the rotor is facilitated.

Furthermore, a marking groove is formed in the position, close to the protruding key, of the shaft hole. The marking grooves are used for conveniently distinguishing the rotor cores of the adjacent sections during installation, and the staggered arrangement of the magnetic steel combination in the rotor cores of the adjacent sections is realized; the rotor punching sheet is of a structure, the rotor core is formed by stacking the same side in the same direction, the other adjacent rotor core needs to be installed on the reverse side to realize the pole error of the magnetic steel combination during installation, whether the pole error exists can be seen through the dislocation of the marking groove, and the installation of the rotor core is facilitated.

Compared with the prior art, the utility model have following technical advantage:

1. the rotor core of the permanent magnet motor adopts a sectional type structure, the permanent magnet adopts a magnetic steel combination formed by a plurality of magnetic steels, the permanent magnet is embedded in the rotor core, the magnetic steel combination in the adjacent sections of the rotor cores is arranged in a staggered mode, the U-shaped magnetic steel combination increases the magnetic flux, and the staggered pole arrangement structure reduces the cogging torque, vibration and noise; the embedded magnetic steel combination structure is convenient to assemble and is beneficial to high-speed rotation of the motor;

2. the rotor core of the permanent magnet motor is manufactured by stacking the rotor punching sheets, so that the eddy current loss is reduced, and the magnetic steel grooves, the shaft holes and the identification groove structures on the rotor core are convenient to process; the convex key on the shaft hole of the rotor core is equivalent to a flat key for shaft installation and is integrated on the shaft hole, so that the shaft is convenient to install; the rotor core is formed by stacking the rotor punching sheets, the precision of the shaft hole is not high, and the arrangement of the clearance avoiding part is beneficial to the installation of the shaft; whether the pole is wrong or not can be seen through the dislocation of the marking groove, so that the installation of the rotor iron core is convenient;

3. the cooling channel that has the axial reciprocating in this permanent-magnet machine's the casing subassembly, cooling channel forms through the axial slot that distributes in the shell body wall thickness, and the axial slot is easily the shaping in the shell body, makes things convenient for the production manufacturing.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a perspective view of the housing body of FIG. 2;

FIG. 5 is a perspective view of the other end of the housing body of FIG. 4;

FIG. 6 is a perspective view of the rotor core of FIG. 2;

FIG. 7 is a perspective view of the magnet steel combination within the rotor core of FIG. 2;

FIG. 8 is a front view of a surface of a rotor plate of the rotor core of FIG. 6;

FIG. 9 is a front view of another surface of the rotor sheet of FIG. 8.

Detailed Description

The invention will be described in further detail with reference to embodiments shown in the drawings.

As shown in fig. 1 to 9, the present invention discloses a rotor segmented pole-staggered permanent magnet motor.

As shown in fig. 1, 2 and 3, the rotor segmented pole-staggered permanent magnet motor includes a rotor assembly 100, a stator assembly 200 and a housing assembly 300, wherein the housing assembly 300 has a housing cavity 310 for fixing the stator assembly 200; the stator assembly 200 has an axially disposed stator cavity 210, and a rotatable rotor assembly 100 is disposed within the stator cavity 210.

As shown in fig. 6 and 7, the rotor assembly 100 includes a plurality of segments of rotor cores 110 and a plurality of magnetic steel assemblies 120, wherein the rotor cores 110 are axially segmented; the magnetic steel combination 120 is formed by arranging a plurality of magnetic steels 121 in a wide-mouthed U shape, the plurality of magnetic steel combinations 120 are embedded in magnetic steel grooves 146 on the outer side of the cylinder of the rotor core 110, and the openings of the magnetic steel combinations 120 face the outer side; the magnetic steel assemblies 120 are arranged in staggered poles on the adjacent sections of the rotor core 110.

The rotor core of the permanent magnet motor adopts a sectional type structure, the permanent magnet adopts a magnetic steel combination formed by a plurality of magnetic steels, the permanent magnet is embedded in the rotor core, the magnetic steel combinations in adjacent sections of the rotor cores are arranged in a staggered mode, the magnetic steel combinations increase the magnetic flux, and the staggered pole arrangement structure reduces the cogging torque, the vibration and the noise; the embedded magnetic steel combination structure is convenient to assemble and is beneficial to high-speed rotation of the motor.

As shown in fig. 1, 2 and 3, the housing assembly 300 includes a housing body 320, a first end cap 330 and a second end cap 340. As shown in fig. 4 and 5, the housing body 320 has an axially reciprocating cooling channel 350 therein. As shown in fig. 2 and 3, the housing body 320 has a first end cap 330 at one end and a second end cap 340 at the other end; the cooling channel 350 is sealingly connected to the first end cap 330 and the second end cap 340. A first gasket 331 is disposed between the first end cap 330 and the housing body 320, and a second gasket 341 is disposed between the second end cap 340 and the housing body 320. The shell assembly is formed by fixing the first end cover and the second end cover at two ends of the shell body, the structure is simple, the assembly is convenient, the cooling channel is arranged on the shell body to take away heat on the stator assembly, and the heat dissipation and the stable operation of the motor are ensured.

As shown in fig. 4 and 5, the cooling passage 350 includes an inlet 351, an outlet 352, a plurality of axial grooves 353, and a plurality of connecting grooves 354; the plurality of axial grooves 353 are distributed at intervals in the wall thickness of the shell body 320; the connecting grooves 354 are positioned at two ends of the shell body 320, the connecting grooves 354 are communicated with two adjacent axial grooves 353, the connecting grooves 354 are arranged at the same end of the shell body 320 at intervals, and are staggered at the two ends; the liquid inlet 351 and the liquid outlet 352 are respectively disposed outside the housing body 320 corresponding to two adjacent axial grooves 353, and there is no connecting groove 354 between the two axial grooves 353 corresponding to the liquid inlet 351 and the liquid outlet 352. As shown in fig. 4 and 5, twelve axial grooves 353 are uniformly distributed in the wall thickness of the housing body 320, five connecting grooves 354 are formed on the end surface close to the first end cover 330, and six connecting grooves 354 are formed on the other end surface. The cooling channel is formed by the axial grooves distributed in the wall thickness of the shell body, and the axial grooves are easy to form in the shell body, so that the production and the manufacture are convenient. When the motor works, cooling liquid enters from the liquid inlet, axially flows back and forth through the axial groove of the shell body, and finally flows out of the liquid outlet, and the cooling liquid takes away heat generated by the stator assembly.

As shown in fig. 2, 3 and 4, the inner wall of the housing body 320 is provided with a positioning step 321 attached to one end of the stator assembly 200, the other end of the stator assembly 200 is provided with a fixing ring 360 for pressing, and the fixing ring 360 is pressed and fixed by the second end cover 340; the inner wall of the shell body 320 is provided with three axial grooves 322 which are uniformly distributed, the outer wall of the stator assembly 200 is provided with three axial protrusions 220 which are uniformly distributed, and the axial protrusions 220 are positioned in the axial grooves 322. Stator module passes through this internal location step of shell and solid fixed ring axial positioning in casing subassembly, has restricted stator module's axial displacement, and stator module's axial bulge has restricted stator module's rotatory removal in being located this internal axial groove of shell, and stator module is fixed in casing subassembly. The stator assembly comprises a stator core and a coil winding wound on the stator core.

As shown in fig. 2 and 3, the rotor assembly 100 includes a rotating shaft 130. As shown in fig. 6, 8 and 9, the rotor core 110 is formed by stacking the rotor sheets 140, the rotor sheet 140 has a shaft hole 141 at a central position, the rotating shaft 130 passes through the shaft hole 141, a protruding key 142 is disposed on the shaft hole 141 and connected to the rotating shaft 130, and space-avoiding portions 143 mounted on the rotating shaft 130 are disposed on two sides of the protruding key 142. The rotor core is manufactured by stacking the rotor punching sheets, so that the eddy current loss is reduced, and the processing of structures such as a magnetic steel groove, a shaft hole and the like on the rotor core is facilitated; the convex key on the shaft hole of the rotor core is equivalent to a flat key for installing the rotating shaft and is integrated on the shaft hole, so that the rotating shaft is convenient to install; because rotor core forms through rotor punching stack dress, the precision in shaft hole is not high, sets up and keeps away the installation that the portion is favorable to the pivot.

As shown in fig. 3, one end of the rotation shaft 130 is provided with a shaft step 131 positioned at one end of the rotor core 110, and the other end of the rotation shaft 130 is locked to the other end of the rotor core 110 by a nut, limiting axial movement of the rotation shaft 130 within the rotor core 110.

As shown in fig. 2 and 3, the housing assembly 300 includes a first bearing 370 and a second bearing 380, the first bearing 370 and the second bearing 380 are respectively fixed at two ends of the housing assembly 300, and the rotating shaft 130 is fixedly connected to the first bearing 370 and the second bearing 380. The provision of the first and second bearings 370 and 380 facilitates rotation of the rotor assembly 100 on the housing assembly 300. As shown in fig. 3, the first bearing 370 and the second bearing 380 are ball bearings, each including an inner race and an outer race. The first end cap 330 has a bearing hole for fixing the outer ring of the first bearing 370, the bearing hole of the first end cap 330 has an inner step for fitting an end face of the outer ring of the first bearing 370, and the inner ring of the first bearing 370 passes through the rotating shaft 130 and is positioned on the step of the rotating shaft 130. The second end cap 340 has a bearing hole for fixing the outer ring of the second bearing 380, the inner ring of the second bearing 380 passes through the end of the rotating shaft 130 and is positioned on the step of the rotating shaft 130, and the outer side of the second end cap 340 is fixed with the bearing end cap 342, and a spring ring is arranged between the bearing end cap and the outer ring of the second bearing 380.

As shown in fig. 6, the rotor core 110 is divided into three sections, one end is a first rotor core 111, the middle is a second rotor core 112, and the other end is a third rotor core 113. The rotor structure is twelve poles, the first rotor core 111, the second rotor core 112 and the third rotor core 113 are respectively provided with twelve magnetic steel slots 146, and the magnetic steel slots 146 comprise three segments of slots. The segmented rotor core structure realizes the staggered arrangement of the magnetic steel combination in the adjacent rotor cores, is favorable for reducing the cogging torque, reducing the vibration noise, improving the sine degree of no-load electromotive force and reducing harmonic waves; the division into three segments makes manufacture and assembly easier. In addition, for the convenience of production, the thickness of each section of rotor core can be made into the same thickness, the middle second rotor core can be segmented again, and the magnetic steel combination in the middle rotor core does not need to be arranged in a staggered mode.

As shown in fig. 7, the magnetic steel assembly 120 is composed of three magnetic steels 121, and twelve sets of magnetic steel assemblies 120 are provided in the circumferential direction of the rotor core 110. Two sections of magnetic steel combinations 120 are axially arranged in the first rotor core 111, four sections of magnetic steel combinations 120 are axially arranged in the second rotor core 112, and two sections of magnetic steel combinations 120 are axially arranged in the third rotor core 113. The magnetic steel combination 120 composed of the three magnetic steels 121 increases magnetic flux relative to the single linear magnetic steel 121, reduces the total eddy current loss of the magnetic steel 121, and improves air gap flux density waveform. The magnetic steel combination 120 in the first rotor core 111 and the magnetic steel combination 120 in the second rotor core 112 have a pole-staggering angle of 2.5 °, the magnetic steel combination 120 in the second rotor core 112 and the magnetic steel combination 120 in the third rotor core 113 have a pole-staggering angle of 2.5 °, and the magnetic steel combination 120 in the first rotor core 111 and the magnetic steel combination 120 in the third rotor core 113 have no pole-staggering.

As shown in fig. 2 and 3, a first baffle 150 and a second baffle 160 are disposed at two ends of the rotor core 110 to limit the magnetic steel assemblies 120 at two ends of the rotor core 110, the first baffle 150 and the second baffle 160 cover the whole end surfaces of the two ends of the rotor core 110 and are respectively mounted on the rotating shaft 130, the first baffle 150 is locked by a nut, and the second baffle 160 is pressed by the shaft step 131 on the rotating shaft 130.

As shown in fig. 6, 8 and 9, magnetic isolation bridges 144 are provided on both sides of the magnetic steel 121 in the magnetic steel assembly 120 on the rotor core 110, and the magnetic steel assembly 120 of three magnetic steels 121 has four magnetic isolation bridges 144. The magnetic isolation bridge has the functions of improving the weak magnetic capacity and increasing the speed regulation range; the structural strength of the rotor is improved, and the high-speed operation of the rotor is facilitated.

As shown in fig. 6, 8 and 9, two raised keys 142 are provided on the shaft hole 141, shaft-mounted space-avoiding portions 143 are provided on both sides of each raised key 142, and the raised keys 142 and the space-avoiding portions 143 are respectively arranged symmetrically with respect to the center. The two symmetrical raised keys enhance the stability of the shaft after installation, and are beneficial to high-speed rotation of the motor.

As shown in fig. 8 and 9, a marking groove 145 is provided in the shaft hole 141 at a position close to the projecting key 142. The marking groove 145 is used for conveniently distinguishing the rotor cores 110 of the adjacent sections during installation, and the staggered arrangement of the magnetic steel combinations 120 in the rotor cores 110 of the adjacent sections is realized; the rotor punching sheet 140 is a structure, the same surface faces the same direction to form the rotor core 110 in a stacked manner, when the rotor core 110 is installed, the opposite side of the adjacent rotor core 110 needs to be installed to realize the pole-staggering of the magnetic steel assembly 120, and whether the pole-staggering is realized can be seen through the dislocation of the marking groove 145, so that the installation of the rotor core 110 is facilitated.

As shown in fig. 6, 8 and 9, a plurality of lightening holes 147 are provided between the shaft hole 141 and the magnetic steel slots 146 on the rotor core 110, and the lightening holes 147 can lighten the weight of the rotor core 110 for manufacturing and assembling.

The above-mentioned embodiments are merely provided for convenience of illustration of the present invention and are not intended to be limiting in form; those skilled in the art should understand that they can make various modifications and changes without departing from the scope of the present invention, and all such modifications and changes are intended to be included within the scope of the present invention.

Claims (10)

1. A rotor segmentation stagger pole permanent magnet motor comprises a rotor assembly, a stator assembly and a shell assembly, and is characterized in that the shell assembly is provided with a shell cavity for fixing the stator assembly; the stator component is provided with a stator cavity which is axially arranged, and a rotatable rotor component is arranged in the stator cavity;

the rotor assembly comprises a plurality of sections of rotor cores and a plurality of magnetic steel combinations, and the rotor cores are axially segmented; the magnetic steel combination is formed by arranging a plurality of magnetic steels in a wide-opening U shape, and a plurality of magnetic steel combinations are embedded in magnetic steel grooves close to the outer side of the rotor core cylinder and the openings of the magnetic steel combinations face the outer side; the magnetic steel combination is arranged on the adjacent sections of the rotor iron core in a staggered manner.

2. The rotor segmented consequent pole permanent magnet machine of claim 1, wherein the housing assembly comprises a housing body having an axially reciprocating cooling channel therein, a first end cap and a second end cap; the first end cover is arranged at one end of the shell body, and the second end cover is arranged at the other end of the shell body; the cooling channel is connected with the first end cover and the second end cover in a sealing mode.

3. The rotor segmented stagger-pole permanent magnet motor according to claim 2, wherein the cooling channel comprises a liquid inlet, a liquid outlet, a plurality of axial slots and a plurality of connecting slots; the plurality of axial grooves are distributed at intervals in the wall thickness of the shell body; the connecting grooves are positioned at two ends of the shell body, the connecting grooves are communicated with two adjacent axial grooves, the connecting grooves are arranged at the same end of the shell body at intervals, and the connecting grooves are staggered at two ends; the liquid inlet and the liquid outlet are respectively arranged at two adjacent axial grooves corresponding to the outer part of the shell body, and the connecting groove is not arranged between the two axial grooves corresponding to the liquid inlet and the liquid outlet.

4. The rotor segmented pole-staggered permanent magnet motor as claimed in claim 2, wherein a positioning step is arranged on the inner wall of the shell body and is attached to one end of the stator assembly, a fixing ring is arranged at the other end of the stator assembly and is pressed and fixed by the fixing ring through the second end cover; the inner wall of the shell body is provided with a plurality of axial grooves, the outer wall of the stator assembly is provided with a plurality of axial bulges, and the axial bulges are positioned in the axial grooves.

5. The rotor segmented pole-staggering permanent magnet motor as claimed in claim 1, wherein the rotor assembly comprises a rotating shaft, the rotor core is formed by stacking rotor punching plates, a shaft hole is formed in the center of each rotor punching plate, the rotating shaft penetrates through the shaft hole, a protruding key is arranged on each shaft hole and connected with the rotating shaft, and space-avoiding portions mounted on the rotating shaft are arranged on two sides of each protruding key.

6. The rotor segmented pole-staggered permanent magnet motor according to claim 5, wherein the housing assembly comprises a first bearing and a second bearing, the first bearing and the second bearing are respectively fixed at two ends of the housing assembly, and the rotating shaft is fixedly connected to the first bearing and the second bearing.

7. The rotor segmented pole-staggered permanent magnet motor as claimed in claim 1, wherein said rotor core is segmented into three segments, one end is a first rotor core, the middle is a second rotor core, and the other end is a third rotor core.

8. The rotor segmented consequent pole permanent magnet motor of claim 1, wherein said magnetic steel assembly is comprised of three magnetic steels.

9. The rotor segmented pole-staggered permanent magnet motor according to claim 1, wherein magnetic isolation bridges are arranged on two sides of the magnetic steel in the magnetic steel combination on the rotor core.

10. The rotor segmented consequent pole permanent magnet motor of claim 5, wherein said shaft hole is provided with a marking slot at a position close to said protruding key.

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