CN220964422U - Permanent magnet synchronous motor - Google Patents
Permanent magnet synchronous motor Download PDFInfo
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- CN220964422U CN220964422U CN202322327661.2U CN202322327661U CN220964422U CN 220964422 U CN220964422 U CN 220964422U CN 202322327661 U CN202322327661 U CN 202322327661U CN 220964422 U CN220964422 U CN 220964422U
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 35
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052802 copper Inorganic materials 0.000 claims abstract description 13
- 239000010949 copper Substances 0.000 claims abstract description 13
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model provides a permanent magnet synchronous motor, which aims to solve the problem that the high-efficiency area for generating power of the motor and an automobile engine have large deviation in an economic operation area, particularly in an economic operation area of 2000-3000 rpm, and relates to the technical field of motors. The permanent magnet synchronous motor comprises a stator and a rotor, wherein a wire inserting groove is formed in the stator, flat copper wires are inserted in the wire inserting groove, the rotor comprises at least one section of iron core section, a plurality of magnetic pole groups are arranged on the iron core section, each magnetic pole group comprises two first permanent magnets in a straight shape and a second permanent magnet in a straight shape, the two first permanent magnets are respectively arranged in inner magnetic pole grooves on the iron core section and are arranged in a V-shaped structure, the second permanent magnets are arranged in outer magnetic pole grooves of the iron core section, 72 wire inserting grooves are formed in the number of the 72 magnetic pole groups, and the number of the flat copper wires inserted in the wire inserting groove is 8. The utility model can reduce the oil consumption of the engine.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a permanent magnet synchronous motor.
Background
In recent years, new energy automobiles are adopted to replace pure fuel automobiles, and due to limitation of the endurance mileage of the pure electric automobiles, development of efficient hybrid electric automobiles becomes a new choice. The current market is popular, and an automobile engine is adopted to directly drive a generator to generate electricity, and then the electric energy is provided for an automobile driving motor or a battery, so that the efficiency loss of a mechanical variable speed transmission system is reduced.
The efficiency of the permanent magnet synchronous motor after design and shaping can be regularly distributed along with the change of the rotating speed and the torque, and the automobile engine also has an economic operation rotating speed interval (about 2000-3000 rpm). In order to enable the high-efficiency area of the motor to be matched with the economic operation condition of the engine, the efficiency interval distribution condition of the motor needs to be considered, and the existing high-efficiency area of the motor in the market is deviated from the economic operation area of the automobile engine, so that the fuel consumption of the engine is higher.
The application number is 202210516040.6 chinese patent discloses a PMSM and rotor thereof, and the motor includes stator and rotor, the rotor sets up in the stator, is equipped with the air gap between rotor and the stator, is equipped with the wiring groove on the stator, and it has flat copper line to alternate in the wiring groove, and flat copper line is according to certain interval rule distributing type cross line, has seted up the open slot that communicates the air gap between stator and the rotor and width is less than the wiring groove width on the side that the wiring groove is close to the stator inboard. In order to improve the sine property of counter potential, the rotor of the motor comprises at least one section of iron core section, the iron core section is formed by connecting a plurality of rotor iron core pieces, a plurality of magnetic pole groups are arranged on each section of iron core section, two of the magnetic pole groups are first permanent magnets in a shape of a Chinese character 'I', the other one is a second permanent magnet in a shape of a Chinese character 'I', the two first permanent magnets are respectively arranged in inner magnetic pole grooves of the iron core section and are arranged in a V-shaped structure, a magnetic pole straight shaft which is axisymmetric relative to the two first permanent magnets is arranged between the two first permanent magnets, and magnetic isolation grooves are arranged at two ends of the inner magnetic pole grooves; the second permanent magnet is arranged in an outer magnetic pole groove on the iron core section and positioned between the V-shaped structures formed by the two first permanent magnets, the symmetry axis of the second permanent magnet is coincident with the magnetic pole straight axis, and the distance between the second permanent magnet and the outer peripheral surface of the rotor core piece is smaller than the distance between the first permanent magnet and the outer peripheral surface of the rotor core piece. The permanent magnet synchronous motor and the rotor thereof aim at the common pole slot matching of 48 slots and 8 poles, and are mainly used as a driving motor. When the device is used as a generator, the deviation between the high-efficiency area and the economic operation area of the automobile engine is large, and the device cannot meet the use requirement.
Disclosure of utility model
The technical problem to be solved by the utility model is to provide a permanent magnet synchronous motor so as to solve the problem that the high-efficiency area for the power generation work of the motor has large deviation from the economic operation area of an automobile engine, especially the economic operation area of 2000-3000 rpm.
The technical scheme adopted for solving the technical problems is as follows: the permanent magnet synchronous motor comprises a stator and a rotor, wherein the rotor is arranged in the stator, a wire inserting groove is formed in the stator, flat copper wires are inserted in the wire inserting groove, the rotor comprises at least one section of iron core section, a plurality of magnetic pole groups are arranged on the iron core section, each magnetic pole group comprises two first permanent magnets in a straight shape and a second permanent magnet in a straight shape, the two first permanent magnets are respectively arranged in inner magnetic pole grooves on the iron core section and are arranged in a V-shaped structure, the second permanent magnets are arranged in outer magnetic pole grooves of the iron core section, the symmetry axis of each second permanent magnet coincides with the magnetic pole straight axes of the two first permanent magnets, the number of the wire inserting grooves is 72, the number of the magnetic pole groups is 12, and the number of the flat copper wires inserted in the wire inserting groove is 8 layers.
Further, the distance from the side surface of the wire insertion groove close to the inner side of the stator to the inner side surface of the stator is H, H=a+ (0.13-0.3 mm), a is the thickness of the flat copper wire, and the length L of the flat copper wire positioned at the innermost side of the stator, bent towards the center direction of the stator, is staggered, and L is not more than H.
Further, the flat copper wire is distributed and jumped according to a winding rule with a pitch of 5 or 6.
Further, the open slot of the slot is of a gradual change structure with gradually reduced width from the inner end to the outer end, two sides of the open slot are provided with arc-shaped notches, the size of a slot shoulder angle alpha formed by the tangent line of the notch and the inner side surface of the stator is 10-35 degrees, and the open width b of the outer end of the open slot is 1-1.7 mm.
Further, the rotor comprises n sections of iron core sections, two adjacent sections of iron core sections are arranged in a staggered mode along the circumferential direction, the angle of the two adjacent sections of iron core sections staggered along the circumferential direction is (5/n) ° plus or minus 0.2 °, n is an integer, and n is more than or equal to 2.
Further, an included angle theta is formed between the two first permanent magnets, and the included angle theta is 100-108 degrees.
Further, the width of the outer magnetism isolating bridge of the inner magnetic pole groove is 0.7-1.2 mm.
Further, the width of the inner magnetism isolating bridge of the inner magnetic pole groove is 0.9-1.2 mm.
Further, the distance w between the two first permanent magnets and the near-core end of the center of the iron core section is 6-7 mm.
The beneficial effects of the utility model are as follows: the permanent magnet synchronous motor disclosed by the utility model is characterized in that on the basis of the existing permanent magnet synchronous motor, the number of the wire inserting grooves 11 is 72, the number of the magnetic pole groups is 12, and after the number of the flat copper wires 3 inserted in the wire inserting grooves 11 is 8 layers, the high-efficiency area of the motor is higher in contact with the economic operation area of an automobile engine, especially the economic operation area of 2000-3000 rpm, by matching with the V+one magnetic pole group structure, so that the oil consumption of the engine can be reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an enlarged schematic view at A of FIG. 1;
FIG. 3 is a schematic structural view of a rotor;
FIG. 4 is a schematic structural view of a rotor;
Fig. 5 is a schematic view of the arrangement of the innermost flat copper wire of the stator;
FIG. 6 is a waveform of motor torque using a conventional open slot;
FIG. 7 is a motor torque waveform employing the open slot configuration of the present utility model;
FIG. 8 is a conventional design air gap field harmonic;
FIG. 9 is an air gap field harmonic of the present utility model;
FIG. 10 is a conventional design no-load counter potential waveform;
FIG. 11 is an idling back emf waveform of the present utility model;
FIG. 12 is a conventional design torque ripple waveform;
Fig. 13 is a waveform diagram of torque ripple of the present utility model, showing:
FIG. 14 is a graph of actual effect of engine fuel consumption versus motor efficiency intervals of conventional construction;
FIG. 15 is a graph of engine fuel consumption versus motor efficiency intervals of the present application;
The figure shows: the stator 1, the rotor 2, the flat copper wire 3, the slot 11, the open slot 111, the notch 112, the core segment 21, the first permanent magnet 22, the second permanent magnet 23, the inner magnetic pole slot 24, the outer magnetic pole slot 25, the outer magnetic bridge 241, and the inner magnetic bridge 242.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
As shown in fig. 1 to 3, the permanent magnet synchronous motor of the utility model comprises a stator 1 and a rotor 2, wherein the rotor 2 is arranged in the stator 1, an air gap is arranged between the rotor 2 and the stator 1, a wire inserting groove 11 is arranged on the stator 1, a flat copper wire 3 is inserted in the wire inserting groove 11, an opening groove 111 which is communicated with the air gap between the stator and the rotor and has a width smaller than the width of the wire inserting groove is arranged on the side surface of the wire inserting groove 11, which is close to the inner side of the stator 1, and the rotor 2 comprises at least one section of iron core section 21. The iron core segment 21 can be formed by riveting a rotor iron core piece with the thickness of 0.2-0.5mm, and the material of the rotor iron core piece 11 is preferably silicon steel sheet. The iron core section 21 is provided with a plurality of magnetic pole groups, each magnetic pole group comprises two first permanent magnets 22 in a straight shape and a second permanent magnet 23 in a straight shape, the two first permanent magnets 22 are respectively arranged in an inner magnetic pole groove 24 on the iron core section 21 and are arranged in a V-shaped structure, the second permanent magnets 23 are arranged in an outer magnetic pole groove 25 of the iron core section 21 between the V-shaped structures formed by the two first permanent magnets, and the symmetry axes of the second permanent magnets are overlapped with the magnetic pole straight axes of the two first permanent magnets 22. The number of the wire inserting grooves 11 is 72, the number of the magnetic pole groups is 12, and the number of the flat copper wires 3 inserted in the wire inserting grooves 11 is 8.
Based on the existing permanent magnet synchronous motor, the permanent magnet synchronous motor has 72 wire inserting grooves 11, 12 magnetic pole groups and 8 layers of flat copper wires 3 inserted in the wire inserting grooves 11, and is matched with a V+one magnetic pole group structure, and experiments show that the high-efficiency area of the motor is higher in overlap ratio with an economic operation area of an automobile engine, particularly an economic operation area of 2000-3000 rpm.
Specifically, the flat copper wire 3 is distributed over the wire according to a winding rule with a pitch of 5 or 6. In fig. 5, the flat copper wires 3 are arranged in a wire-wound regular distribution type overline with a pitch of 5.
As shown in fig. 2, the distance between the side surface of the wire insertion slot 11 near the inner side of the stator 1 and the inner side surface of the stator 1 is H, where H may generally be set to any value greater than 0, in this embodiment of the present utility model, h=a+ (0.13-0.3 mm), a is the thickness of the flat copper wire 3, and the length L of the flat copper wire 3 located at the innermost side of the stator 1 bent toward the center of the stator 1 forms a dislocation, where L is not greater than H (see fig. 5). Setting H as h=a+ (0.13-0.3 mm), and bending the flat copper wire 3 positioned at the innermost side of the stator 1 towards the center direction of the stator 1 to form dislocation, wherein L is not greater than H, so that the flat copper wire of the stator can be bent towards the axis direction, thereby reducing the heights of two ends of the flat wire winding, reducing the volume of the motor, and avoiding interference on site when the motor rotor is assembled.
As shown in fig. 2, the opening slot 111 of the wire insertion slot 11 has a gradual change structure with gradually decreasing width from the inner end to the outer end, two sides of the opening slot 111 are provided with arc-shaped notches 112, a slot shoulder angle α formed by a tangent line of the notch 112 and the inner side surface of the stator 1 is 10 ° to 35 °, and the opening width b of the outer end of the opening slot 111 is 1 to 1.7mm. As shown in fig. 6 and 7, fig. 6 shows a motor torque waveform using a conventional open slot, and fig. 7 shows a motor torque waveform using an open slot structure of the present utility model, and it is apparent from the figure that by this feature arrangement, it is possible to reduce the magnetic flux loss, significantly reduce the cogging torque (the cogging torque decreases from about 1 to about 0.35), reduce the ac loss, and improve the motor power generation efficiency, thereby facilitating a more consistent motor efficiency zone and an engine efficiency zone.
In the present utility model, preferably, the rotor 2 includes n sections 21, two adjacent sections 21 are staggered circumferentially, the angle of staggering the two adjacent sections 21 circumferentially is (5/n) ° plus or minus 0.2 °, n is an integer, and n is not less than 2. The structure can lead the adjacent two sections of iron core sections 21 to be arranged with oblique poles of 5/n degrees plus or minus 0.2 degrees in a staggered way along the circumferential direction. The sectional mode can axially symmetrically divide the inclined pole (V-shaped inclined pole) according to the requirement on the axial force of the motor, and then the length of each section is 1/2 of the original length.
An included angle θ is formed between the two first permanent magnets 22, and the included angle θ between the two first permanent magnets 22 is usually required to be obtained through simulation experiments. When the rotor with the structure is adopted, an included angle theta is formed between the two first permanent magnets 22, and the performance is optimal when the included angle theta is 100-108 degrees.
The width of the magnetic isolation bridge, i.e., the outer magnetic isolation bridge 241, at the outer end of the inner magnetic pole slot 24 is generally 0.7-1.5mm, which is optimal for the manufacturability and the utilization ratio of the magnet, and the width of the outer magnetic isolation bridge 241 of the inner magnetic pole slot 24 is 0.7-1.2 mm. The width of the inner magnetic isolation bridge, that is, the width of the inner magnetic isolation bridge 242 at the inner end of the inner magnetic pole groove 24 is the same as that of the existing structure, the width of the inner magnetic isolation bridge 242 is 0.9-3mm (the value can be adjusted according to the actual rotor strength), and preferably, the utilization rate of the permanent magnet is optimal when the width of the inner magnetic isolation bridge 242 is 0.9-1.2 mm.
The spacing w between the two first permanent magnets 22 from the proximal end of the rotor center is typically found experimentally. When the rotor with the above structure is adopted, as shown in fig. 3, the performance is optimal when the distance w between the two first permanent magnets 22 and the near-center end of the center of the iron core segment 21 is 6-7mm, which is beneficial to enabling the high-efficiency area to be more consistent with the economic operation area of 2000-3000 rpm of the engine.
By adopting the inclined pole with the structure, the air gap harmonic waves are exactly offset, and the aim of improving the sine of the counter potential is fulfilled. The torque ripple generated by each segment balances each other, reducing the motor torque pulse. As shown in fig. 6 to 13, compared with the prior art, the test result shows that the air gap harmonic magnetic field of the permanent magnet synchronous motor is reduced, the sine degree is better, and the motor torque fluctuation, the cogging torque fluctuation and the noise are reduced. As shown in fig. 14 and 15, with the motor of the present utility model, the motor high efficiency region is more coincident with the economical operating region of the engine of 2000-3000 rpm, both of which are substantially completely coincident.
Claims (9)
1. Permanent magnet synchronous motor, including stator (1) and rotor (2), rotor (2) set up in stator (1), be equipped with wire insertion groove (11) on stator (1), insert wire insertion groove (11) are interior to be inserted with flat copper line (3), rotor (2) are including at least one section iron core section (21), be equipped with a plurality of magnetic pole group on iron core section (21), magnetic pole group includes two first permanent magnets of a style of calligraphy (22) and a style of calligraphy second permanent magnet (23), two first permanent magnet (22) are installed respectively in interior magnetic pole groove (24) on iron core section (21) and are arranged and are V type structural arrangement, second permanent magnet (23) are installed in outer magnetic pole groove (25) of iron core section (21), and the symmetry axis of self with two the straight-axis coincidence of magnetic pole of first permanent magnet (22), its characterized in that: the number of the wire inserting grooves (11) is 72, the number of the magnetic pole groups is 12, and the number of the flat copper wires (3) inserted in the wire inserting grooves (11) is 8.
2. The permanent magnet synchronous motor of claim 1 wherein: the distance between the side surface of the wire insertion groove (11) close to the inner side of the stator (1) and the inner side surface of the stator (1) is H, H=a+ (0.13-0.3 mm), a is the thickness of the flat copper wire (3), and the length L of the flat copper wire (3) positioned at the innermost side of the stator (1) bent towards the center direction of the stator (1) forms dislocation, wherein L is not more than H.
3. The permanent magnet synchronous motor of claim 1 wherein: the flat copper wires (3) are distributed and jumpers according to a winding rule with a pitch of 5 or 6.
4. A permanent magnet synchronous motor according to claim 1, 2 or 3, characterized in that: the opening groove (111) of the plug wire groove (11) is of a gradual change structure with gradually reduced width from the inner end to the outer end, arc-shaped notches (112) are formed in two sides of the opening groove (111), a groove shoulder angle alpha formed by a tangent line of the notches (112) and the inner side surface of the stator (1) in a surrounding mode is 10-35 degrees, and the opening width b of the outer end of the opening groove (111) is 1-1.7 mm.
5. The permanent magnet synchronous motor of claim 4 wherein: the rotor (2) comprises n sections of iron core sections (21), wherein two adjacent sections of iron core sections (21) are staggered in the circumferential direction, the angle of the two adjacent sections of iron core sections (21) staggered in the circumferential direction is (5/n) ° plus or minus 0.2 degrees, n is an integer, and n is more than or equal to 2.
6. A permanent magnet synchronous motor according to claim 1 or 5, characterized in that: an included angle theta is formed between the two first permanent magnets (22), and the included angle theta is 100-108 degrees.
7. The permanent magnet synchronous motor of claim 6 wherein: the width of the outer magnetism isolating bridge (241) of the inner magnetic pole groove (24) is 0.7-1.2 mm.
8. The permanent magnet synchronous motor of claim 7 wherein: the width of the inner magnetism isolating bridge (242) of the inner magnetic pole groove (24) is 0.9-1.2 mm.
9. The permanent magnet synchronous motor of claim 8 wherein: the distance w between the two first permanent magnets (22) and the near center end of the center of the iron core section (21) is 6-7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322327661.2U CN220964422U (en) | 2023-08-29 | 2023-08-29 | Permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322327661.2U CN220964422U (en) | 2023-08-29 | 2023-08-29 | Permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220964422U true CN220964422U (en) | 2024-05-14 |
Family
ID=90982591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322327661.2U Active CN220964422U (en) | 2023-08-29 | 2023-08-29 | Permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220964422U (en) |
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2023
- 2023-08-29 CN CN202322327661.2U patent/CN220964422U/en active Active
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