CN220628980U - Permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor - Google Patents
Permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN220628980U CN220628980U CN202321413564.9U CN202321413564U CN220628980U CN 220628980 U CN220628980 U CN 220628980U CN 202321413564 U CN202321413564 U CN 202321413564U CN 220628980 U CN220628980 U CN 220628980U
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- permanent magnets
- rotor core
- sinusoidal
- stator
- 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.)
- Active
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 47
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims abstract description 28
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 10
- 238000003475 lamination Methods 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000000696 magnetic material Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 14
- 230000010349 pulsation Effects 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Abstract
The utility model discloses a permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor, wherein a stator core part of the motor comprises an amorphous alloy part and a silicon steel part, and the advantages of low high-frequency loss of the amorphous alloy and high saturation magnetic density of the silicon steel are utilized, so that the high-frequency loss of the stator core part is reduced, and the magnetic density in an amorphous alloy material is ensured not to exceed the saturation magnetic density of the amorphous alloy; the outer surface part corresponding to each magnetic pole of the rotor core is provided with a stepped arc notch, a group of segmented permanent magnets are arranged in the stepped arc notch, and the thickness of the central permanent magnet is the largest, and the thicknesses of the two sides of the central permanent magnet are gradually reduced in a sine arrangement mode, so that the air gap magnetic flux density corresponding to each magnetic pole is sequentially reduced from a symmetrical shaft to the outside, the air gap magnetic flux density is more similar to a sine wave, high-frequency harmonic waves are effectively reduced, the total harmonic wave content of the air gap magnetic flux density and the air gap radial electromagnetic force density are reduced, and further the torque pulsation and vibration noise of the motor are reduced.
Description
Technical Field
The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor.
Background
The high-speed surface-mounted permanent magnet synchronous motor is an important special motor. Current research on high-speed motors is focused on increasing the operating speed as much as possible to increase the power density of the motor. As rotor speed increases, torque ripple and vibration noise requirements are also increasing as compared to motors at normal operating speeds. High-speed operation causes higher frequency harmonics to be contained in the stator core portion and the rotor core, resulting in a sharp increase in stator core portion loss and high-frequency eddy current loss to be generated in the rotor core. The stator and rotor temperature rise of the motor can be increased, the mechanical strength is reduced, and the demagnetization risk of the permanent magnet can be greatly increased. Excessive local temperature increases may also lead to a reduction in rotor limit stress.
Because the permanent magnet is positioned on the surface of the rotor, the permanent magnet of the high-speed surface-mounted permanent magnet synchronous motor is highly utilized, and has larger torque output capacity and wider constant torque speed regulation range. However, the low weak magnetic energy of the high-speed surface-mounted permanent magnet synchronous motor narrows the constant power speed regulation range. The interaction between the stator cogging and the rotor permanent magnet field creates cogging torque and torque ripple. The larger cogging torque and torque pulsation can influence the stable operation of the electric automobile, particularly when the electric automobile runs at high speed, the large torque pulsation can increase the abrasion of a rotor iron core and a bearing, and the service life of the high-speed surface-mounted permanent magnet synchronous motor is shortened. Meanwhile, the cogging torque and torque pulsation can cause larger vibration noise, and the comfort of the electric automobile is seriously affected.
Patent CN115694014a proposes a motor rotor core segment and a motor rotor having a rotor core assembly, in which cogging torque and torque ripple are weakened by means of rotor segment diagonal poles, the rotor is divided into 5 segments, each segment is sequentially offset by an angle, the thickness of rotor segment lamination at both ends is smaller than that of the middle three rotor segments, and the cogging torque and torque ripple are reduced by using the phase difference between each permanent magnet segment, and the mutual compensation of cogging torque and electromagnetic torque waveforms. However, the manufacturing process is complex, the mechanical strength of the connection between the rotor sections is weak, and slipping between the rotor sections is easy to occur during high-speed operation. Patent CN110649722a proposes a motor integrating amorphous alloy and silicon steel as stator core parts, the stator is independently manufactured by using amorphous alloy and silicon steel, and the two stators are coaxially connected. The amorphous alloy stator has extremely low high-frequency loss, and can effectively reduce the iron loss of the motor during high-speed operation, thereby improving the high-speed operation efficiency. But the magnetic permeability and saturation magnetic density of the amorphous alloy material are lower than those of silicon steel, so that the improvement of torque is limited, and meanwhile, the magnetic density saturation of the stator can bring larger torque pulsation and radial electromagnetic force, so that vibration noise is generated, and the riding comfort of the electric automobile is influenced
In summary, when the traditional high-speed surface-mounted permanent magnet synchronous motor runs at high speed, high-frequency current excites high-frequency magnetic flux in the stator core part, and larger high-frequency loss is generated in the stator core part, so that the temperature of the motor rises too high when the motor runs at high speed; meanwhile, when the traditional high-speed surface-mounted permanent magnet synchronous motor runs at a high speed, the high-frequency harmonic content in the air gap flux density is serious in distortion, so that the radial electromagnetic force density of a stator core part is large, and torque pulsation and vibration noise are serious.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides a permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor. The stator structure of the high-performance high-speed surface-mounted permanent magnet synchronous motor is manufactured by adopting a method of combining amorphous alloy and silicon steel materials, and the characteristics of extremely low high frequency loss of the amorphous alloy and high magnetic conductivity and high saturation magnetic density of the silicon steel are utilized, so that the high frequency loss of the stator of the high-speed motor is reduced, and the efficiency under high-speed operation is improved. Meanwhile, a stepped arc notch is formed in the outer surface part corresponding to each magnetic pole of the rotor core, a group of segmented permanent magnets are arranged in the stepped arc notch, the thickness of the center permanent magnet is maximum, and the thicknesses of the two sides of the center permanent magnet are gradually reduced in a sine arrangement mode, so that the air gap magnetic flux density corresponding to each magnetic pole is sequentially reduced from a symmetrical shaft to the outside, the air gap magnetic flux density is more similar to sine waves, the total harmonic wave content of the air gap magnetic flux density and the air gap radial electromagnetic force density are reduced, and torque pulsation and vibration noise are reduced.
The technical scheme adopted for solving the technical problems is as follows: the design of the permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor is characterized by comprising a stator core part, a winding, a rotor core, a rotating shaft, a permanent magnet and a sheath; the stator core part comprises an amorphous alloy part and a silicon steel part, wherein the amorphous alloy part is an annular stator yoke made of amorphous alloy materials through lamination and adhesion and N first stator teeth connected to the inner side surface of the annular stator yoke, the silicon steel part is N second stator teeth made of silicon steel through lamination and adhesion, the tail end face of the first stator teeth is matched with the top end face of the second stator teeth in size, and the two stator teeth are fixed together in an adhesion mode to form N stator teeth; windings are wound on the N stator teeth;
the rotor core is positioned inside the stator core part, the widths of the rotor core and the stator core are the same, and the positions of the rotor core and the stator core are opposite; the outer surface of each magnetic pole of the annular rotor core is provided with the same step arc-shaped notch; the depth of the middle notch of the step arc notch is maximum, the two sides of the step arc notch are symmetrical, and the step position of the step arc notch gradually decreases from the two sides to the middle; a group of permanent magnets matched with the stepped arc-shaped notch are arranged in each stepped arc-shaped notch, the peripheral end faces of the permanent magnets in all the stepped arc-shaped notches form a ring shape, the adjacent permanent magnets and the rotor core are fixed in an adhesive mode, and a sheath is sleeved on the peripheral end faces of all the permanent magnets, so that all the permanent magnets and the rotor core are fixed into a whole; the rotor core is fixed on the rotating shaft through the central through hole;
the width of each permanent magnet in a group of permanent magnets in each stepped arc notch is the same, the magnetizing direction of each permanent magnet is perpendicular to the outer end face of each permanent magnet, the permanent magnets in each group of permanent magnets are alternately arranged along the circumferential direction N pole and S pole of the rotor core, and the arrangement modes of the permanent magnets in different groups are the same;
an air gap is reserved between the end face of the tail end of the stator tooth of the stator core part and the sheath; the sheath on the peripheral end face of the permanent magnet is made of non-magnetic material.
Compared with the prior art, the utility model has the beneficial effects that: the stator core part of the motor designed by the utility model comprises an amorphous alloy part and a silicon steel part, and the advantages of low high frequency loss of the amorphous alloy and high saturation magnetic density of the silicon steel are utilized, so that the high frequency loss of the stator core part is reduced, and the magnetic density in the amorphous alloy material is ensured not to exceed the saturation magnetic density of the amorphous alloy; the outer surface part corresponding to each magnetic pole of the rotor core is provided with a stepped arc notch, a group of segmented permanent magnets are arranged in the stepped arc notch, and the thickness of the central permanent magnet is maximum, the thicknesses of the two sides of the central permanent magnet are gradually reduced, so that the air gap magnetic flux density corresponding to each magnetic pole is sequentially reduced from the symmetrical shaft to the outside, the air gap magnetic flux density is more similar to a sine wave, high-frequency harmonic waves are effectively reduced, the total harmonic wave content of the air gap magnetic flux density and the air gap radial electromagnetic force density are reduced, and further, the torque pulsation and vibration noise during high-speed operation of the high-speed permanent magnet synchronous motor are reduced.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor according to the present utility model.
Fig. 2 is a schematic diagram illustrating the assembly of a rotor core and a permanent magnet of an embodiment of the permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor of the present utility model.
Fig. 3 is a schematic diagram illustrating assembly of a rotor core and a permanent magnet of another embodiment of a permanent magnet sinusoidal segment type high-performance high-speed surface-mounted permanent magnet synchronous motor according to the present utility model.
Fig. 4 is a schematic diagram showing the comparison of air gap magnetic density waveforms of a conventional high-speed surface-mounted permanent magnet synchronous motor (curve a) and a motor according to the present utility model in permanent magnet sinusoidal segments 3 (curve B), 5 (curve C), 7 (curve D) and 9 (curve E).
Fig. 5 is a schematic diagram showing the waveform harmonic analysis and comparison of air gap magnetic density of a traditional high-speed surface-mounted permanent magnet synchronous motor (curve a) and a motor according to the utility model in permanent magnet sinusoidal segments 3 (curve B), 5 (curve C), 7 (curve D) and 9 (curve E).
Fig. 6 is a schematic diagram showing the comparison of back electromotive force waveforms of a conventional high-speed surface-mounted permanent magnet synchronous motor (curve a) and a motor according to the present utility model in permanent magnet sinusoidal segments 3 (curve B), 5 (curve C), 7 (curve D) and 9 (curve E).
Fig. 7 is a schematic diagram showing the harmonic analysis and comparison of back electromotive force waveforms of a conventional high-speed surface-mounted permanent magnet synchronous motor (curve a) and a motor according to the present utility model in permanent magnet sinusoidal segments 3 (curve B), 5 (curve C), 7 (curve D) and 9 (curve E).
Fig. 8 is a schematic diagram showing the comparison of cogging torque between a conventional high-speed surface-mounted permanent magnet synchronous motor (curve a) and a motor according to the present utility model in permanent magnet sinusoidal segments 3 (curve B), 5 (curve C), 7 (curve D) and 9 (curve E).
Fig. 9 is a schematic diagram showing the torque ripple (curve B) of the motor according to the present utility model at different permanent magnet segment numbers with respect to the cogging torque peak value (curve a) at different permanent magnet segment numbers.
Fig. 10 is a schematic diagram showing the maximum vibration comparison between a conventional high-speed surface-mounted permanent magnet synchronous motor (curve a) and a sinusoidal segment 7 (curve B) of a motor permanent magnet according to the present utility model at 0-5000 Hz.
Fig. 11 is a graph showing the comparison of the maximum sound pressure level of a conventional high-speed surface-mounted permanent magnet synchronous motor (curve a) and the sinusoidal section 7 of the motor permanent magnet (curve B) of the present utility model at a distance of 50mm from the stator surface at 0-5000 Hz.
Detailed Description
Reference should be made to the accompanying drawings, which are to be understood as being exemplary examples of the utility model, which are within the scope of the claims, and which are to be construed as having a guiding significance for implementing the corresponding technical solutions by a person skilled in the art, and not as limiting the utility model. The utility model is further described below with reference to the accompanying drawings.
The utility model provides a permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor (motor for short), which comprises a stator core part, a winding, a rotor core, a rotating shaft, a permanent magnet and a sheath; the stator core part comprises an amorphous alloy part and a silicon steel part, wherein the amorphous alloy part is an annular stator yoke made of amorphous alloy materials through lamination and adhesion and N first stator teeth connected to the inner side surface of the annular stator yoke, the silicon steel part is N second stator teeth made of silicon steel through lamination and adhesion, the tail end face of the first stator teeth is matched with the top end face of the second stator teeth in size, and the two stator teeth are fixed together in an adhesion mode to form N stator teeth; the N stator teeth are wound with windings. The N stator teeth are wound with three-phase symmetrical windings.
The rotor core is positioned inside the stator core part, the widths (namely the lengths along the axial direction) of the rotor core and the stator core are the same, and the positions of the rotor core and the stator core are opposite; the outer surface of each magnetic pole of the annular rotor core is provided with the same step arc-shaped notch; the depth of the middle notch of the step arc notch is the largest, the two sides of the step arc notch are symmetrical, and the step position of the step arc notch gradually decreases from the two sides to the middle. A group of permanent magnets matched with the permanent magnets are arranged in each step arc notch, the peripheral end faces of the permanent magnets in all the step arc notches form a ring shape, the adjacent permanent magnets and the rotor core are fixed in an adhesive mode, and a sheath is sleeved on the peripheral end faces of all the permanent magnets, so that all the permanent magnets and the rotor core are fixed into a whole. The rotor core is fixed on the rotating shaft through the central through hole.
The thickness of each permanent magnet in a group of permanent magnets in each stepped arc notch is not less than 2mm, the width is the same, the magnetizing direction of each permanent magnet is perpendicular to the peripheral end face (namely along the radial direction of the rotor core), the permanent magnets in each group of permanent magnets are alternately arranged along the N pole and the S pole of the circumferential direction of the rotor core, and the arrangement modes of the permanent magnets in different groups are the same.
An air gap is reserved between the end face of the tail end of the stator tooth of the stator core part and the sheath, and the air gap is between 0.5mm and 0.8 mm.
The sheath on the peripheral end face of the permanent magnet is a fiber binding belt sheath made of non-magnetic carbon fiber materials.
The utility model has the innovation points that the stator core part structure and the rotor core structure of the traditional high-speed surface-mounted permanent magnet synchronous motor only use silicon steel materials, and the stator core part has high-frequency magnetic flux when in high-speed operation, so that the loss of the stator core part is very large. The permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor is characterized in that an amorphous alloy material is adopted to manufacture a stator yoke and part of stator teeth connected with the stator yoke, silicon steel is adopted to manufacture a stator tooth top and part of stator teeth connected with the stator tooth top, and the motor loss is reduced on the premise that the magnetic density of each construction of a stator core part does not exceed the saturated magnetic density by utilizing extremely low high-frequency loss of the amorphous alloy, high magnetic permeability and high saturated magnetic density of the silicon steel. The permanent magnet of the traditional high-speed surface-mounted permanent magnet synchronous motor is not placed on the surface of a rotor in a segmented mode, the air gap magnetic density waveform is close to a square wave, larger torque pulsation and vibration noise can be generated during high-speed operation, the permanent magnet of the permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor is divided into a plurality of segments, the thickness of the permanent magnet below each magnetic pole is sequentially reduced from the center of the magnetic pole to the outside, the air gap magnetic density sinusoidal is increased, and the torque pulsation and vibration noise during high-speed operation of the motor are reduced.
Example 1
The embodiment provides a permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor, which comprises a stator core part, a three-phase symmetrical winding 3, a rotor core 6, a rotating shaft 11, a permanent magnet and a sheath 4, wherein the permanent magnet is a permanent magnet; the stator core part comprises an amorphous alloy part 1 and a silicon steel part 2, wherein the amorphous alloy part 1 is an annular stator yoke made of amorphous alloy materials through lamination and adhesion, and 12 first stator teeth connected to the inner side surface of the annular stator yoke, the silicon steel part 2 is 12 second stator teeth made of silicon steel through lamination and adhesion, the tail end face of the first stator teeth is matched with the top end face of the second stator teeth in size, and the two stator teeth are fixed together in an adhesion mode to form 12 stator teeth; the three-phase symmetrical windings 3 are wound on the 12 stator teeth, so that a rotating magnetic field can be generated, and the magnetic field interacts with the rotor core 6, so that torque can be generated;
the rotor core 6 is positioned inside the stator core part, and the widths (i.e. the lengths along the axial direction) of the rotor core and the stator core are the same, and the positions of the rotor core and the stator core are opposite; the rotor core 6 is provided with 4 pairs of magnetic poles, and the outer surface corresponding to each magnetic pole of the annular rotor core 6 is provided with the same step arc-shaped notch; the depth of the middle notch of the step arc notch is the largest, the two sides of the step arc notch are symmetrical, and the step position of the step arc notch gradually decreases from the two sides to the middle.
Three steps are respectively arranged on two sides of the middle notch of each step arc notch, a group of permanent magnets matched with the step arc notch are arranged in each step arc notch, the peripheral end faces of the permanent magnets in all the step arc notches form a ring shape, the adjacent permanent magnets and the rotor core 6 are fixed in an adhesive mode, and a sheath is sleeved on the peripheral end faces of all the permanent magnets, so that all the permanent magnets and the rotor core are fixed into a whole. The rotor core 6 is fixed on the rotating shaft 11 through a central through hole thereof, so that the rotor core can drive the rotating shaft 11 to synchronously rotate.
The group of permanent magnets arranged in one stepped arc notch comprises 7 permanent magnets, namely 7 permanent magnet sinusoidal segments, specifically a center permanent magnet 7 of one permanent magnet sinusoidal segment, a second permanent magnet 8 of two permanent magnet sinusoidal segments, a third permanent magnet 9 of two permanent magnet sinusoidal segments and a fourth permanent magnet 10 of two permanent magnet sinusoidal segments.
The width of each permanent magnet is the same as the width of a stepped arc notch on the outer surface of the rotor, a central permanent magnet 7 of a permanent magnet sinusoidal section is arranged in a middle notch, second permanent magnets 8 of two permanent magnet sinusoidal sections are respectively arranged on two sides of the central permanent magnet 7 of the permanent magnet sinusoidal section, third permanent magnets 9 of two permanent magnet sinusoidal sections are respectively arranged on two sides of the second permanent magnets 8 of the permanent magnet sinusoidal section, fourth permanent magnets 10 of two permanent magnet sinusoidal sections are respectively arranged on two sides of the third permanent magnets 9 of the permanent magnet sinusoidal section, and the structure enables the air gap magnetic density wave of the motor to be more similar to a sine wave, and torque pulsation and vibration noise are lower during high-speed operation.
The thickness of the permanent magnets in a group of permanent magnets of each step arc notch is not less than 2mm, the magnetizing direction of each permanent magnet is perpendicular to the peripheral end face (namely along the radial direction of the rotor core), the permanent magnets in each group of permanent magnets are alternately arranged along the circumferential direction of the rotor core along the N pole and the S pole, and the arrangement modes of the permanent magnets in different groups are the same.
An air gap 5 is reserved between the end face of the tail end of the stator tooth of the stator core part and the sheath, and the air gap 5 is between 0.5mm and 0.8 mm.
In this embodiment, the rotor core has 4 pairs of magnetic poles, the permanent magnet on each magnetic pole is sinusoidal and divided into 7 sections, the width of each section of permanent magnet is the same, the fiber binding belt sheath is sleeved outside the permanent magnet, the fixing function is achieved, and the thickness of the fourth section of permanent magnet 10 of the sinusoidal section of the permanent magnet is greater than 2mm.
Example 2
The present embodiment provides a permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor, and the structure of each part of the motor in this embodiment is the same as that in embodiment 1, and is different in that a group of permanent magnets under each magnetic pole of rotor core 12 in this embodiment includes 5 permanent magnets, i.e. permanent magnet sinusoidal segmented 5 segments, and two steps are respectively disposed on two sides of a middle notch of a stepped arc notch of rotor core 12 correspondingly.
As shown in fig. 3, which is an assembly schematic diagram of a rotor core and a permanent magnet, the rotor part comprises a sheath 4, a rotor core 12, a central permanent magnet 13 of a permanent magnet sinusoidal segment, a second permanent magnet 14 of the permanent magnet sinusoidal segment, a third permanent magnet 15 of the permanent magnet sinusoidal segment, and a rotating shaft 11.
The rotor core 12 is provided with 4 pairs of magnetic poles, and the outer surface corresponding to each magnetic pole of the annular rotor core 12 is provided with the same step arc-shaped notch; the depth of the middle notch of the step arc notch is the largest, the two sides of the step arc notch are symmetrical, and the step position of the step arc notch gradually decreases from the two sides to the middle.
Two steps are respectively arranged on two sides of a middle notch of each step arc notch, a group of permanent magnets matched with the step arc notch are arranged in each step arc notch, the peripheral end faces of the permanent magnets in all the step arc notches form a ring shape, the adjacent permanent magnets and the rotor core 12 are fixed in an adhesive mode, and a sheath is sleeved on the peripheral end faces of all the permanent magnets to enable all the permanent magnets and the rotor core to be fixed into a whole. The rotor core 12 is fixed to the rotary shaft 11 through a central through hole thereof so that it can drive the rotary shaft 11 to rotate synchronously.
The group of permanent magnets arranged in one stepped arc notch comprises 5 permanent magnets, namely 5 permanent magnet sinusoidal segments, specifically a center permanent magnet 13 of one permanent magnet sinusoidal segment, a second permanent magnet 14 of two permanent magnet sinusoidal segments and a third permanent magnet 15 of two permanent magnet sinusoidal segments.
The width of the permanent magnet is the same as the width of the stepped arc notch on the outer surface of the rotor core, the central permanent magnet 13 of the permanent magnet sinusoidal section is arranged in the middle notch, the second permanent magnets 14 of the two permanent magnet sinusoidal sections are respectively arranged at two sides of the central permanent magnet 13 of the permanent magnet sinusoidal section, and the third permanent magnets 15 of the two permanent magnet sinusoidal sections are respectively arranged at two sides of the second permanent magnets 14 of the permanent magnet sinusoidal section.
The rotor core has 4 pairs of magnetic poles, the permanent magnet sinusoidal of every magnetic pole divides 5 sections, and each section permanent magnet width is the same, and fibre binding area sheath cover plays fixed effect in the permanent magnet outside, and permanent magnet sinusoidal sectional third section permanent magnet 15 thickness is greater than 2mm.
Example 3
The embodiment provides a permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor, wherein the structure of each part of the motor in the embodiment is the same as that in the embodiment 1, a rotor core is provided with 4 pairs of magnetic poles, and the outer surface corresponding to each magnetic pole of an annular rotor core is provided with the same step arc-shaped notch; the difference is that in this embodiment, a group of permanent magnets under each magnetic pole of the rotor core includes 9 permanent magnets, that is, the permanent magnets are sinusoidal and divided into 9 sections, and correspondingly, four steps are respectively arranged on two sides of a middle gap of the stepped arc gap of the rotor core.
Example 4
The embodiment provides a permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor, wherein the structure of each part of the motor in the embodiment is the same as that in the embodiment 1, a rotor core is provided with 4 pairs of magnetic poles, and the outer surface corresponding to each magnetic pole of an annular rotor core is provided with the same step arc-shaped notch; the difference is that in this embodiment, a group of permanent magnets under each magnetic pole of the rotor core includes 3 permanent magnets, that is, the permanent magnets are sinusoidal and divided into 3 sections, and corresponding, two sides of the middle notch of the stepped arc notch of the rotor core are respectively provided with a step.
The motors of examples 1-4 were tested for performance and a conventional high-speed surface-mounted permanent magnet synchronous motor was used as a reference.
Fig. 4 and fig. 5 show a comparison diagram of the air gap magnetic density waveform and harmonic analysis results of a conventional high-speed surface-mounted permanent magnet synchronous motor (i.e. permanent magnet is of equal thickness and is of curve a) and the motor of the utility model in permanent magnet sinusoidal section 3 (curve B), permanent magnet sinusoidal section 5 (curve C), permanent magnet sinusoidal section 7 (curve D) and permanent magnet sinusoidal section 9 (curve E); as is obvious from the graph, the increase of the number of sinusoidal segments of the permanent magnet can improve the waveform sine property of the air gap flux density and reduce the total harmonic distortion of the air gap flux density.
Fig. 6 and fig. 7 show a comparison diagram of back electromotive force waveforms and harmonic analysis results of a conventional high-speed surface-mounted permanent magnet synchronous motor (i.e., permanent magnet is of equal thickness, and is a curve a) and a motor of the present utility model in a permanent magnet sinusoidal segment 3 (curve B), a permanent magnet sinusoidal segment 5 (curve C), a permanent magnet sinusoidal segment 7 (curve D), and a permanent magnet sinusoidal segment 9 (curve E); as is evident from the figure, the increased number of sinusoidal segments of the permanent magnet can improve the sine of the back emf waveform and reduce the total harmonic distortion of the back emf.
Fig. 8 shows a schematic diagram of comparing cogging torque of a conventional high-speed surface-mounted permanent magnet synchronous motor (i.e., permanent magnet is of equal thickness, and is a curve a) with cogging torque of the motor according to the present utility model in a permanent magnet sinusoidal segment 3 (curve B), a permanent magnet sinusoidal segment 5 (curve C), a permanent magnet sinusoidal segment 7 (curve D), and a permanent magnet sinusoidal segment 9 (curve E); FIG. 9 shows a schematic of cogging torque peak (curve A) at different numbers of permanent magnet segments versus torque ripple (curve B) at different numbers of permanent magnet segments; as is apparent from the figure, an increase in the number of sinusoidal segments of the permanent magnet can reduce cogging torque and torque ripple at high speeds.
FIGS. 10 and 11 show a comparison of maximum vibration acceleration and maximum sound pressure level at 540mm from the motor surface for a motor with a permanent magnet that is not segmented at different frequencies (i.e., the permanent magnet is of equal thickness, curve A) and for the motor of example 1 (curve B); as is apparent from the figures, the present utility model can significantly reduce vibration noise.
The utility model relates to only the core component of a motor, the arrangement mode of a stator core part, a rotating shaft and a motor shell is not in the protection scope of the utility model, and as an installation mode, the stator core part is fixed in the motor base of the motor shell in an insulated U-shaped buckle or bonding mode, the rotating shaft is arranged on end covers on two sides of the motor base through shaft sleeves, the end covers are fixedly connected with the motor base, and the end covers provide support for the rotating shaft and do not influence the rotation of the rotating shaft.
The utility model is applicable to the prior art where it is not described.
Claims (9)
1. The high-performance high-speed surface-mounted permanent magnet synchronous motor with the sinusoidal segments of the permanent magnets is characterized by comprising a stator core part, windings, a rotor core, a rotating shaft, the permanent magnets and a sheath; the stator core part comprises an amorphous alloy part and a silicon steel part, wherein the amorphous alloy part is an annular stator yoke made of amorphous alloy materials through lamination and adhesion and N first stator teeth connected to the inner side surface of the annular stator yoke, the silicon steel part is N second stator teeth made of silicon steel through lamination and adhesion, the tail end face of the first stator teeth is matched with the top end face of the second stator teeth in size, and the two stator teeth are fixed together in an adhesion mode to form N stator teeth; windings are wound on the N stator teeth;
the rotor core is positioned inside the stator core part, the widths of the rotor core and the stator core are the same, and the positions of the rotor core and the stator core are opposite; the outer surface of each magnetic pole of the annular rotor core is provided with the same step arc-shaped notch; the depth of the middle notch of the step arc notch is maximum, the two sides of the step arc notch are symmetrical, and the step position of the step arc notch gradually decreases from the two sides to the middle; a group of permanent magnets matched with the stepped arc-shaped notch are arranged in each stepped arc-shaped notch, the peripheral end faces of the permanent magnets in all the stepped arc-shaped notches form a ring shape, the adjacent permanent magnets and the rotor core are fixed in an adhesive mode, and a sheath is sleeved on the peripheral end faces of all the permanent magnets, so that all the permanent magnets and the rotor core are fixed into a whole; the rotor core is fixed on the rotating shaft through the central through hole;
the width of each permanent magnet in a group of permanent magnets in each stepped arc notch is the same, the magnetizing direction of each permanent magnet is perpendicular to the outer end face of each permanent magnet, the permanent magnets in each group of permanent magnets are alternately arranged along the circumferential direction N pole and S pole of the rotor core, and the arrangement modes of the permanent magnets in different groups are the same;
an air gap is reserved between the end face of the tail end of the stator tooth of the stator core part and the sheath; the sheath on the peripheral end face of the permanent magnet is made of non-magnetic material.
2. The permanent magnet sinusoidally segmented high performance high speed surface mount permanent magnet synchronous motor of claim 1 wherein three phase symmetric windings are wound on N stator teeth.
3. A permanent magnet sinusoidally segmented high performance high speed surface mounted permanent magnet synchronous motor according to claim 1 wherein the air gap is between 0.5mm and 0.8 mm.
4. The permanent magnet sinusoidally segmented high performance high speed surface mounted permanent magnet synchronous motor of claim 1 wherein the jacket is made of carbon braze material.
5. The permanent magnet sinusoidally segmented high performance high speed surface mounted permanent magnet synchronous motor of claim 1 wherein 4 pairs of poles are provided on the rotor core.
6. The permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor according to claim 5, wherein three steps are respectively arranged on two sides of a middle notch of the stepped arc notch; a set of permanent magnets disposed within one of the stepped arcuate gaps comprised 7 permanent magnets.
7. The permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor according to claim 5, wherein two steps are respectively arranged on two sides of the middle notch of the stepped arc notch; a group of permanent magnets arranged in one stepped arc notch comprises 5 permanent magnets.
8. The permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor according to claim 5, wherein four steps are respectively arranged on two sides of a middle notch of the stepped arc notch; a group of permanent magnets arranged in one stepped arc notch comprises 9 permanent magnets.
9. A permanent magnet sinusoidally segmented high performance high speed surface mount permanent magnet synchronous motor according to any one of claims 1, 6, 7 and 8, wherein the thickness of each permanent magnet of a set of permanent magnets in each stepped arcuate gap is not less than 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321413564.9U CN220628980U (en) | 2023-06-06 | 2023-06-06 | Permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321413564.9U CN220628980U (en) | 2023-06-06 | 2023-06-06 | Permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220628980U true CN220628980U (en) | 2024-03-19 |
Family
ID=90231903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321413564.9U Active CN220628980U (en) | 2023-06-06 | 2023-06-06 | Permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220628980U (en) |
-
2023
- 2023-06-06 CN CN202321413564.9U patent/CN220628980U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109274240B (en) | Composite amorphous alloy axial flux motor | |
| CN201286055Y (en) | Salient pole permanent magnet synchronous motor | |
| EP2592721A2 (en) | Permanent magnet electrical rotating machine, wind power generating system, and a method of magnetizing a permanent magnet | |
| WO2004112217A2 (en) | Radial airgap, transverse flux motor | |
| EP1639689A2 (en) | Radial airgap, transverse flux motor | |
| CN110061603B (en) | Rotor magnetic circuit decoupling type high-speed hybrid excitation synchronous motor | |
| CN109194082B (en) | Amorphous alloy axial flux motor with wide field weakening speed expansion and low rotor loss | |
| CN100454729C (en) | Bidirectional hybrid excitation brushless electric machine | |
| CN113437849B (en) | Double-rotor single-stator axial magnetic flux hybrid excitation motor | |
| CN101436793A (en) | High power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile | |
| CN106787562A (en) | Alternately pole, mixed excitation directly drives vernier motor | |
| CN102005835A (en) | Halbach outer rotor doubly salient motor | |
| CN110838779B (en) | Mixed excitation wound rotor and mixed excitation wound synchronous motor | |
| CN109861412A (en) | Permanent magnetism top rake formula bearing-free flux switch permanent magnet motor | |
| CN211908613U (en) | Axial flux high-speed permanent magnet motor based on flux linkage sinusoidal permanent magnet | |
| CN101572467B (en) | Highly efficient high-speed permanent magnetic synchronous motor | |
| CN111541326A (en) | Halbach array magnetic gathering type permanent magnet memory motor | |
| CN220628980U (en) | Permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor | |
| CN108599493B (en) | Axial magnetic flux hybrid excitation switched reluctance motor for pure electric vehicle | |
| CN111641307B (en) | High-speed surface-embedded dual-rotor axial flux permanent magnet motor | |
| CN113437850B (en) | Double-stator single-rotor axial magnetic flux hybrid excitation motor | |
| CN114844262A (en) | Half magnetic bridge PMSM rotor, motor and vehicle | |
| CN116526718A (en) | Permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor | |
| CN111211659B (en) | Stator modular annular winding dual-rotor permanent magnet motor | |
| CN112615509A (en) | Double-permanent-magnet embedded permanent magnet synchronous motor structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |