CN114362400A - Permanent magnet synchronous motor rotor punching sheet structure for electric motorcycle and rotor thereof - Google Patents
Permanent magnet synchronous motor rotor punching sheet structure for electric motorcycle and rotor thereof Download PDFInfo
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- CN114362400A CN114362400A CN202210064573.5A CN202210064573A CN114362400A CN 114362400 A CN114362400 A CN 114362400A CN 202210064573 A CN202210064573 A CN 202210064573A CN 114362400 A CN114362400 A CN 114362400A
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- 238000004080 punching Methods 0.000 title claims abstract description 34
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 23
- 230000005389 magnetism Effects 0.000 claims abstract description 74
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 230000001154 acute effect Effects 0.000 claims description 15
- 230000004907 flux Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000005347 demagnetization Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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Abstract
The invention discloses a permanent magnet synchronous motor rotor punching structure for an electric motorcycle, which comprises a punching body, wherein the punching body is divided into a plurality of sector areas with equal shapes and sizes, a slot group is arranged at the position, close to an arc edge, of each sector area, the slot group comprises an inner layer slot body and an outer layer slot body which are respectively used for mounting magnetic steel, and the outer layer slot body is arranged at one side, close to the arc edge, of the inner layer slot body; the inner layer groove body comprises an inner layer middle groove and inner layer side grooves arranged on two sides of the inner layer middle groove, the inner layer middle groove and the inner layer side grooves are rectangular, the inner layer middle groove is symmetrically arranged at the central line of the sector area, the two inner layer side grooves are symmetrically arranged on two sides of the inner layer middle groove by taking the central line of the sector area as the center, two side edges of the inner layer middle groove are respectively provided with an inner layer middle magnetism isolating groove, and one side edge of the inner layer side groove, far away from the inner layer middle groove, is provided with an inner layer side magnetism isolating groove; the outer layer groove body is symmetrically arranged on the central line of the sector area. The invention also discloses a permanent magnet synchronous motor rotor for the electric motorcycle.
Description
Technical Field
The invention relates to the technical field of motor equipment, in particular to a permanent magnet synchronous motor rotor punching sheet structure for an electric motorcycle and a rotor thereof.
Background
With the continuous deterioration of natural environment and the shortage of fossil energy supply, electric vehicles are an effective path for ensuring the mobility of human beings and realizing the sustainable development of the automobile industry while reducing the dependence on fossil fuels and environmental pollution. As a novel clean energy, the electric energy becomes the inevitable trend of future energy development, and the electric vehicle also inevitably replaces the traditional fuel automobile to become the leading vehicle of the new era. The electric vehicle comprises electric passenger vehicles, electric passenger cars, electric logistics vehicles, electric motorcycles, electric bicycles and other vehicles which use a power supply as main power. Compared with an electric automobile, the electric motorcycle is more convenient and smoother to travel, saves more energy and is lower in cost. Particularly, in the current urban center with traffic jam, the two-three line city with lower income cost and the urban traffic are the preferred choice for traveling.
However, in the design and practical application of most of the permanent magnet synchronous motor rotors for electric motorcycles at present, there are many problems that cannot be ignored, such as large motor leakage flux, low power factor, poor sine of back electromotive force, low efficiency, large vibration noise and small high-efficiency operation area.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a rotor punching structure of a permanent magnet synchronous motor for an electric motorcycle and a rotor thereof.
The technical scheme adopted by the invention is as follows:
a permanent magnet synchronous motor rotor punching structure for an electric motorcycle comprises a punching body, wherein the punching body is divided into a plurality of sector areas with equal shapes and sizes, a groove group is arranged at the position, close to an arc edge, of each sector area, the groove group comprises an inner layer groove body and an outer layer groove body, the inner layer groove bodies and the outer layer groove bodies are used for mounting magnetic steel respectively, and the outer layer groove bodies are arranged on one sides, close to the arc edge, of the inner layer groove bodies; the inner layer groove body comprises an inner layer middle groove and inner layer side grooves arranged on two sides of the inner layer middle groove, the inner layer middle groove and the inner layer side grooves are rectangular, the inner layer middle groove is symmetrically arranged at the central line of a sector area, the two inner layer side grooves are symmetrically arranged on two sides of the inner layer middle groove by taking the central line of the sector area as the center, the inner layer middle groove and the two inner layer side grooves are arranged in a V shape, the opening of the V shape formed by the two inner layer side grooves is positioned on one side of the inner layer middle groove close to the arc edge of the sector area, the two side edges of the inner layer middle groove are respectively provided with an inner layer middle magnetism isolating groove, a gap is formed between the inner layer side groove and the inner layer middle magnetism isolating groove, and one side edge of the inner layer side groove, far away from the inner layer middle groove, is provided with an inner layer side magnetism isolating groove; the outer layer groove body is symmetrically arranged on the central line of the sector area.
Preferably, the four corners of the inner layer middle groove are respectively provided with an inner layer middle convex groove protruding outwards, the protruding direction of the inner layer middle convex groove is consistent with the directions of the two side edges of the inner layer middle groove, and the inner layer middle convex groove is communicated with the inner layer middle groove.
Preferably, the inner layer middle magnetism isolating groove is arranged at one end of two side edges of the inner layer middle groove close to the arc edge of the sector area, the inner layer middle magnetism isolating groove is triangular, one side of the inner layer middle magnetism isolating groove is communicated with the inner layer middle groove, and an included angle between the side of the inner layer middle magnetism isolating groove and one side of the inner layer middle magnetism isolating groove close to the arc edge of the sector area is an acute angle.
Preferably, one side edge of the inner layer side groove close to the inner layer middle groove is parallel to one side edge of the other two edges of the inner layer middle magnetism isolating groove close to the arc edge of the sector area.
Preferably, the both corners department of a side that inlayer lateral part groove is close to inlayer middle part groove is equipped with outside bellied inlayer lateral part tongue respectively, the one end that fan-shaped district arc limit was kept away from to a side that inlayer lateral part groove was kept away from inlayer middle part groove is equipped with outside bellied inlayer lateral part tongue, the protruding direction of inlayer lateral part tongue is unanimous with the both sides limit direction in inlayer lateral part groove, inlayer lateral part tongue and inlayer lateral part groove intercommunication.
Preferably, the inner layer side magnetism-isolating groove is arranged at one side edge of the inner layer side groove far away from the inner layer middle groove and is located at one end of the side edge far away from the inner layer side convex groove of the side edge, the inner layer side magnetism-isolating groove is communicated with the inner layer side groove, and an included angle between one side of the inner layer side magnetism-isolating groove far away from the sector arc edge and the side edge of the inner layer middle groove is an acute angle at the communication position of the inner layer side magnetism-isolating groove and the inner layer side groove.
Preferably, the outer cell body includes outer middle part groove and locates the outer lateral part groove of outer middle part groove both sides, outer middle part groove is the central line department of locating the sector of rectangle and symmetry, the one end punishment that the both sides limit of outer middle part groove is close to the sector arc limit does not is equipped with outer middle part magnetism-isolating groove, outer middle part magnetism-isolating groove is triangle-shaped, one side and outer middle part groove intercommunication in outer middle part magnetism-isolating groove, just this limit in outer middle part magnetism-isolating groove and the other both sides in outer middle part magnetism-isolating groove are close to the contained angle between one side on sector arc limit for the acute angle, outer lateral part groove is triangle-shaped, and outer lateral part groove is close to outer middle part groove one side and outer middle part magnetism-isolating groove in the other both sides close to the sector arc limit between parallel arrangement, have the clearance between outer lateral part groove and the outer middle part magnetism-isolating groove.
Preferably, outer cell body includes outer middle part groove and locates the outer middle part magnetism isolating groove of outer middle part groove both sides, outer middle part groove is the central line department of locating the sector of rectangle and symmetry, the both corners department that outer middle part groove is close to one side of the sector centre of a circle is equipped with outside bellied outer middle part tongue respectively, the protruding direction of outer middle part tongue is unanimous with the both sides limit direction in outer middle part groove, outer middle part magnetism isolating groove locates the both corners department that outer middle part groove is close to one side of sector arc limit, outer middle part magnetism isolating groove is trapezoidal, and this trapezoidal one of them waist limit and outer middle part groove intercommunication, this trapezoidal shorter base is located one side that longer base is close to the sector arc limit, and the contained angle between this trapezoidal base and the one side that outer middle part groove is close to the sector arc limit is the obtuse angle.
Preferably, the outer groove body comprises two outer side grooves which are arranged in a V shape and are symmetrically arranged with the central line of the sector, the opening of the V shape faces the arc edge of the sector, the outer side grooves are rectangular, two corners of one side edge of each outer side groove close to the central line of the sector are respectively provided with an outer convex side convex groove, one end of one side edge of each outer side groove far away from the central line of the sector, close to the circle center of the sector, is provided with an outer side convex groove, the convex direction of each outer side convex groove is consistent with the directions of two side edges of each outer side groove, one end of one side edge of each outer side groove close to the central line of the sector, close to the arc edge of the sector, is provided with an outer middle magnetism isolating groove, the outer middle magnetism isolating grooves are triangular, one side of each outer middle magnetism isolating groove is communicated with the outer side grooves, and the side edge of the outer middle magnetism isolating groove is communicated with the other two side edges of the other middle magnetism isolating grooves, close to the arc edge of the sector The contained angle between the limit is the acute angle, one end department that sector central line was kept away from to outer lateral part groove is close to the sector arc limit is equipped with outer lateral part magnetism trap, outer lateral part magnetism trap is triangle-shaped, one side and the outer lateral part groove intercommunication in outer lateral part magnetism trap, just this limit of outer lateral part magnetism trap and the contained angle between the one side that is close to the sector arc limit in the other both sides in outer lateral part magnetism trap are the acute angle.
A permanent magnet synchronous motor rotor for an electric motorcycle is formed by overlapping a plurality of punching sheets with the permanent magnet synchronous motor rotor punching sheet structure for any electric motorcycle.
The invention has the beneficial effects that: the rotor air gap flux density manufactured by the rotor punching sheet structure is more sinusoidal, the harmonic content of the motor can be reduced, the efficiency of the motor can be improved, the reluctance torque of the motor can be increased, the output torque of the motor can be increased, and the field weakening and speed expanding capability of the motor can be improved.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic structural diagram of embodiment 1 of the present invention after magnetic steel assembly;
FIG. 3 is a schematic structural diagram of a single sector in example 1 of the present invention;
FIG. 4 is a schematic structural diagram of a single sector after magnetic steel is assembled in embodiment 1 of the present invention;
FIG. 5 is a schematic structural diagram of a single sector in example 2 of the present invention;
FIG. 6 is a schematic structural diagram of a single sector in example 3 of the present invention;
reference numerals: 10. the punching sheet body comprises a punching sheet body, 20, a sector area, 30, an inner layer middle groove, 31, an inner layer middle convex groove, 32, an inner layer middle magnetism isolating groove, 40, an inner layer side groove, 41, an inner layer side convex groove, 42, an inner layer side magnetism isolating groove, 50, an outer layer middle groove, 51, an outer layer middle convex groove, 52, an outer layer middle magnetism isolating groove, 60, an outer layer side groove, 61, an outer layer side convex groove, 62, an outer layer middle magnetism isolating groove, 63, an outer layer side magnetism isolating groove, 70 and magnetic steel.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-4, a permanent magnet synchronous motor rotor punching structure for an electric motorcycle comprises a punching body 10, wherein the punching body 10 is divided into a plurality of sector areas 20 with equal shapes and sizes, a slot group is arranged at a position, close to an arc edge, of each sector area 20, the slot group comprises an inner layer slot body and an outer layer slot body which are respectively used for mounting magnetic steel 70, and the outer layer slot body is arranged at one side, close to the arc edge, of each sector area 20; the inner layer tank body comprises an inner layer middle tank 30 and inner layer side tanks 40 arranged at both sides of the inner layer middle tank 30, the inner layer middle groove 30 and the inner layer side groove 40 are rectangular, the inner layer middle groove 30 is symmetrically arranged at the central line of the sector area 20, the two inner layer side grooves 40 are symmetrically arranged at the two sides of the inner layer middle groove 30 by taking the central line of the sector area 20 as the center, the inner layer middle groove 30 and the two inner layer side grooves 40 are arranged in a V shape, and the V-shaped opening formed by the two inner layer side grooves 40 is positioned at one side of the inner layer middle groove 30 close to the arc edge of the sector area 20, the two side edges of the inner layer middle groove 30 are respectively provided with an inner layer middle magnetism isolating groove 32, a gap is arranged between the inner layer side groove 40 and the inner layer middle magnetism isolating groove 32, an inner layer side magnetism isolating groove 42 is arranged on one side edge of the inner layer side groove 40, which is far away from the inner layer middle groove 30; the outer layer groove bodies are symmetrically arranged on the central line of the sector area 20.
Specifically, the four corners of the inner middle groove 30 are respectively provided with an inner middle convex groove 31 protruding outwards, the protruding direction of the inner middle convex groove 31 is consistent with the directions of the two sides of the inner middle groove 30, and the inner middle convex groove 31 is communicated with the inner middle groove 30.
Specifically, the inner layer middle magnetism isolating groove 32 is arranged at one end of two side edges of the inner layer middle groove 30 close to the arc edge of the sector area 20, the inner layer middle magnetism isolating groove 32 is triangular, one side of the inner layer middle magnetism isolating groove 32 is communicated with the inner layer middle groove 30, and an included angle between the side of the inner layer middle magnetism isolating groove 32 and one side of the other two sides of the inner layer middle magnetism isolating groove 32 close to the arc edge of the sector area 20 is an acute angle.
Specifically, one side of the inner layer side groove 40 close to the inner layer middle groove 30 is parallel to one side of the other two sides of the inner layer middle magnetism isolating groove 32 close to the arc side of the sector 20.
Specifically, the both corners department of a side that inlayer lateral part groove 40 is close to inlayer middle part groove 30 is equipped with outside bellied inlayer lateral part tongue 41 respectively, the one end that fan-shaped district 20 arc limit was kept away from to a side that inlayer lateral part groove 40 is kept away from inlayer middle part groove 30 is equipped with outside bellied inlayer lateral part tongue 41, the protruding direction of inlayer lateral part tongue 41 is unanimous with the both sides limit direction of inlayer lateral part groove 40, inlayer lateral part tongue 41 and inlayer lateral part groove 40 intercommunication.
Specifically, the inner layer side magnetism isolating groove 42 is arranged at one side edge of the inner layer side groove 40 far away from the inner layer middle groove 30 and is located at one end of the inner layer side convex groove 41 far away from the edge, the inner layer side magnetism isolating groove 42 is communicated with the inner layer side groove 40, and an included angle between one side of the inner layer side magnetism isolating groove 42 and the inner layer side groove 40 far away from the arc edge of the sector area 20 and the side edge of the inner layer middle groove 30 is an acute angle.
Specifically, the outer layer groove body comprises an outer layer middle groove 50 and outer layer side grooves 60 arranged at two sides of the outer layer middle groove 50, the outer layer middle groove 50 is rectangular and symmetrically arranged at the central line of the sector area 20, the two side edges of the outer layer middle groove 50 are respectively provided with an outer layer middle magnetism isolating groove 52 at one end close to the arc edge of the sector area 20, the outer layer middle magnetism isolating groove 52 is triangular, one side of the outer layer middle magnetism isolating groove 52 is communicated with the outer layer middle groove 50, and the angle between the side of the outer layer middle magnetism isolating groove 52 and one of the other two sides of the outer layer middle magnetism isolating groove 52 close to the arc side of the sector area 20 is an acute angle, the outer layer side groove 60 is triangular, and one side of the outer layer side groove 60 close to the outer layer middle groove 50 and one side of the other two sides of the outer layer middle magnetism-isolating groove 52 close to the arc side of the sector 20 are arranged in parallel, and a gap is formed between the outer layer side groove 60 and the outer layer middle magnetism-isolating groove 52.
The clearance between inlayer lateral part groove 40 and inlayer middle part magnetism-isolating groove 32 forms the magnetic bridge, can improve motor speed, increases the motor weak magnetism and expands fast ability, and magnet steel 70 passes through inlayer middle part groove 30, inlayer lateral part groove 40 and the fixed setting of outer middle part groove 50, and when the motor adjustment was rotated, inlayer middle part groove 30, inlayer lateral part groove 40 and outer middle part groove 50 can prevent that magnet steel 70 from removing.
In design, the width of the inner layer middle groove 30 is consistent with the width of the inner layer side groove 40, one side of the inner layer side groove 40 facing the inner layer middle groove 30 is provided with two inner layer side convex grooves 41, due to the existence of the inner layer side convex grooves 41, the length of the side is larger than the width of the middle part of the inner layer side groove 40, the length of one side of the inner layer middle magnetism isolating groove 32 corresponding to the inner layer side groove 40 is also larger than the width of the middle part of the inner layer middle groove 30, the length of the magnetic bridge formed by the gap between the inner layer side groove 40 and the inner layer middle magnetism isolating groove 32 is larger than the widths of the magnetic steel 70 installed in the inner layer side groove 40 and the inner layer middle groove 30, so that the motor has enough magnetic bridge strength when running at high rotating speed, meanwhile, the magnetic flux leakage of the magnetic steel 70 is reduced as much as possible, and the using amount of the magnetic steel 70 is saved.
The width of inlayer lateral part magnetism-isolating groove 42 is less than the width at inlayer lateral part groove 40 middle part, and the width of magnet steel 70 is great when so designing, and when motor stator tooth width is less, can adjust motor magnetic pole width and motor polar arc coefficient in a flexible way for reduce motor torque fluctuation when promoting the motor moment of torsion.
The width of outer middle groove 50 is less than the width of inlayer middle groove 30, reducible outer magnet steel 70 quantity, and outer magnet steel 70 is narrower simultaneously can reduce outer magnet steel 70's eddy current loss, promotes magnet steel 70's demagnetization ability. And a magnetic bridge is formed between one side of the outer-layer middle magnetism isolating groove 52 facing the outer-layer side groove 60 and the outer-layer side groove 60, so that the rotating speed of the motor can be increased, and the field weakening capability of the motor is improved. The outer side grooves 60 and the outer middle magnetism isolating grooves 52 can reduce magnetic flux leakage of the magnetic steel 70, and the using amount of the magnetic steel 70 is saved. Outer middle part magnetism-isolating groove 52 still can play the effect of adjustment towards piece magnetic field intensity saturation to make the air gap magnetic density more close sinusoidal, can effectively restrain motor higher harmonic, reduce motor torque fluctuation, reduce motor noise, promote motor efficiency.
Example 2
The embodiment is substantially the same as embodiment 1, except that the structure of the outer layer tank body is different, as shown in fig. 5, the outer layer tank body in this embodiment includes an outer layer middle tank 50 and outer layer middle magnetism isolating tanks 52 disposed at both sides of the outer layer middle tank 50, the outer layer middle tank 50 is rectangular and symmetrically disposed at the center line of the sector area 20, two corners of one side of the outer layer middle tank 50 near the center of the sector area 20 are respectively provided with an outer layer middle convex tank 51 protruding outwards, the protruding direction of the outer layer middle convex tank 51 is the same as the directions of both sides of the outer layer middle tank 50, the outer layer middle magnetism isolating tanks 52 are disposed at two corners of one side of the outer layer middle tank 50 near the arc edge of the sector area 20, the outer layer middle magnetism isolating tank 52 is trapezoidal, one waist edge of the trapezoidal shape is communicated with the outer layer middle tank 50, the shorter bottom edge of the trapezoidal shape is located at one side of the longer bottom edge near the arc edge of the sector area 20, the angle between the bottom of the trapezoid and the side of the outer layer middle slot 50 near the arc of sector 20 is obtuse.
The width of outer middle part groove 50 is less than the width of inlayer middle part groove 30, reducible outer magnet steel quantity, and outer magnet steel can reduce the eddy current loss of outer magnet steel more narrowly simultaneously, promotes the demagnetization ability of magnet steel. The magnetic flux leakage of the magnetic steel can be reduced by the outer side grooves, and the magnetic steel consumption is saved. Outer middle part magnetic isolation groove 52 can play the effect of adjustment towards piece magnetic field intensity saturation degree to make the air gap magnetic density more close sinusoidal, can effectively restrain motor higher harmonic, reduce motor torque fluctuation, reduce motor noise, promote motor efficiency.
Example 3
The present embodiment is substantially the same as embodiment 1, except that the structure of the outer layer tank body is different, as shown in fig. 6, the outer layer tank body in the present embodiment includes two outer layer side grooves 60 arranged in a "V" shape and symmetrically arranged with respect to the center line of the sector 20, the opening of the "V" shape faces the arc edge of the sector 20, the outer layer side grooves 60 are rectangular, two corners of one side of the outer layer side grooves 60 close to the center line of the sector 20 are respectively provided with an outer layer side convex groove 61 protruding outward, one end of one side of the outer layer side grooves 60 far from the center line of the sector 20 close to the center of the sector 20 is provided with an outer layer side convex groove 61, the protruding direction of the outer layer side convex groove 61 is the same as the direction of the two sides of the outer layer side grooves 60, one end of one side of the outer layer side grooves 60 close to the center line of the sector 20 close to the arc edge of the sector 20 is provided with an outer layer middle magnetism isolating groove 62, the outer layer middle magnetism isolating groove 62 is triangular, one side of the outer layer middle magnetism isolating groove 62 is communicated with the outer layer side groove 60, an included angle between the side of the outer layer middle magnetism isolating groove 62 and one side of the other two sides of the outer layer middle magnetism isolating groove 62, which is close to the arc side of the sector area 20, is an acute angle, one end, which is close to the arc side of the sector area 20, of one side of the outer layer side groove 60, which is far away from the central line of the sector area 20 is provided with the outer layer side magnetism isolating groove 63, the outer layer side magnetism isolating groove 63 is triangular, one side of the outer layer side magnetism isolating groove 63 is communicated with the outer layer side groove 60, and an included angle between the side of the outer layer side magnetism isolating groove 63 and one side of the other two sides of the outer layer side magnetism isolating groove 63, which is close to the arc side of the sector area 20 is an acute angle.
Form the magnetic bridge between two outer lateral part grooves 60, can promote the motor speed, increase the weak magnetic capacity of motor, and the width in outer lateral part groove 60 all is less than the width in inlayer middle part groove 30, reducible outer magnet steel quantity, outer magnet steel can reduce the eddy current loss of outer magnet steel more narrowly simultaneously, promotes the demagnetization ability of magnet steel. Two outer middle part magnetism-isolating grooves 62 one side relative are parallel to each other and set up, and length all is greater than the width in outer lateral part groove 60 for the length of magnetic bridge is longer, has sufficient magnetic bridge intensity when guaranteeing the high-speed operation of motor, reduces the magnet steel magnetic leakage as far as simultaneously, saves the magnet steel quantity. Outer lateral part magnetism-isolating groove 63 can play the effect of adjustment towards piece magnetic field intensity saturation degree to make the air gap magnetic density more close sinusoidal, can effectively restrain motor higher harmonic, reduce motor torque fluctuation, reduce motor noise, promote motor efficiency.
Example 4
A permanent magnet synchronous motor rotor for an electric motorcycle is formed by superposing a plurality of punching sheets of the permanent magnet synchronous motor rotor punching sheet structure for the electric motorcycle in any one of embodiments 1 to 3.
The rotor air gap flux density manufactured by the rotor punching sheet structure is more sinusoidal, the harmonic content of the motor can be reduced, the efficiency of the motor can be improved, the reluctance torque of the motor can be increased, the output torque of the motor can be increased, and the field weakening and speed expanding capability of the motor can be improved.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A permanent magnet synchronous motor rotor punching structure for an electric motorcycle is characterized by comprising a punching body, wherein the punching body is divided into a plurality of sector areas with equal shapes and sizes, a groove group is arranged at the position, close to an arc edge, of each sector area, the groove group comprises an inner layer groove body and an outer layer groove body, the inner layer groove bodies and the outer layer groove bodies are used for mounting magnetic steel respectively, and the outer layer groove bodies are arranged at one sides, close to the arc edge, of the inner layer groove bodies; the inner layer groove body comprises an inner layer middle groove and inner layer side grooves arranged on two sides of the inner layer middle groove, the inner layer middle groove and the inner layer side grooves are rectangular, the inner layer middle groove is symmetrically arranged at the central line of a sector area, the two inner layer side grooves are symmetrically arranged on two sides of the inner layer middle groove by taking the central line of the sector area as the center, the inner layer middle groove and the two inner layer side grooves are arranged in a V shape, the opening of the V shape formed by the two inner layer side grooves is positioned on one side of the inner layer middle groove close to the arc edge of the sector area, the two side edges of the inner layer middle groove are respectively provided with an inner layer middle magnetism isolating groove, a gap is formed between the inner layer side groove and the inner layer middle magnetism isolating groove, and one side edge of the inner layer side groove, far away from the inner layer middle groove, is provided with an inner layer side magnetism isolating groove; the outer layer groove body is symmetrically arranged on the central line of the sector area.
2. The rotor punching structure of the permanent magnet synchronous motor for the electric motorcycle according to claim 1, wherein the four corners of the inner layer middle groove are respectively provided with an inner layer middle convex groove protruding outwards, the protruding direction of the inner layer middle convex groove is consistent with the direction of the two side edges of the inner layer middle groove, and the inner layer middle convex groove is communicated with the inner layer middle groove.
3. The rotor punching structure of the permanent magnet synchronous motor for the electric motorcycle according to claim 2, wherein the inner layer middle magnetism-isolating groove is formed at one end of two side edges of the inner layer middle groove close to the arc edge of the sector area, the inner layer middle magnetism-isolating groove is triangular, one edge of the inner layer middle magnetism-isolating groove is communicated with the inner layer middle groove, and an included angle between the edge of the inner layer middle magnetism-isolating groove and one edge of the other two edges of the inner layer middle magnetism-isolating groove close to the arc edge of the sector area is an acute angle.
4. The rotor punching structure of the permanent magnet synchronous motor for the electric motorcycle according to claim 3, wherein one side of the inner layer side groove close to the inner layer middle groove is parallel to one side of the other two sides of the inner layer middle magnetism isolating groove close to the arc side of the sector area.
5. The rotor punching structure of the permanent magnet synchronous motor for the electric motorcycle according to claim 4, wherein two corners of one side of the inner layer side groove close to the inner layer middle groove are respectively provided with an inner layer side convex groove which protrudes outwards, one end of one side of the inner layer side groove far away from the inner layer middle groove far away from the arc edge of the sector area is provided with an inner layer side convex groove which protrudes outwards, the protruding direction of the inner layer side convex groove is consistent with the directions of two side edges of the inner layer side groove, and the inner layer side convex groove is communicated with the inner layer side groove.
6. The rotor punching structure of the permanent magnet synchronous motor for the electric motorcycle according to claim 5, wherein the inner layer side magnetism-isolating groove is formed in one side edge of the inner layer side groove, which is far away from the inner layer middle groove, and is located at one end of the inner layer side tongue groove, which is far away from the side edge, the inner layer side magnetism-isolating groove is communicated with the inner layer side groove, and an included angle formed between one side of the communicated position of the inner layer side magnetism-isolating groove and the inner layer side groove, which is far away from the arc edge of the sector area, and the side edge of the inner layer middle groove is an acute angle.
7. The rotor punching structure of the PMSM for the electric motorcycle according to claim 6, wherein the outer layer slot body includes an outer layer middle slot and outer layer side slots provided at both sides of the outer layer middle slot, the outer layer middle slot is rectangular and symmetrically provided at the center line of the sector, the outer layer middle magnetism-isolating slots are respectively provided at the ends of both sides of the outer layer middle slot near the arc edge of the sector, the outer layer middle magnetism-isolating slot is triangular, one side of the outer layer middle magnetism-isolating slot is communicated with the outer layer middle slot, and the included angle between the one side of the outer layer middle magnetism-isolating slot and the one side of the other two sides of the outer layer middle magnetism-isolating slot near the arc edge of the sector is an acute angle, the outer layer side slot is triangular, and one side of the outer layer side slot near the outer layer middle slot and one side of the other two sides of the outer layer middle magnetism-isolating slot near the arc edge of the sector are arranged in parallel, and a gap is formed between the outer layer side groove and the outer layer middle magnetism isolating groove.
8. The rotor punching structure of the permanent magnet synchronous motor for the electric motorcycle according to claim 6, the outer layer tank body comprises an outer layer middle tank and outer layer middle magnetism isolating tanks arranged at two sides of the outer layer middle tank, the outer layer middle groove is rectangular and symmetrically arranged at the central line of the sector area, two corners of one side of the outer layer middle groove close to the circle center of the sector area are respectively provided with an outer layer middle convex groove which is convex outwards, the convex direction of the middle convex groove of the outer layer is consistent with the directions of the two side edges of the middle groove of the outer layer, the middle magnetism isolating groove of the outer layer is arranged at the two corners of one side of the middle groove of the outer layer, which is close to the arc edge of the sector area, the middle magnetism isolating groove of the outer layer is trapezoidal, one waist edge of the trapezoid is communicated with the middle groove of the outer layer, the shorter bottom edge of the trapezoid is positioned at one side of the longer bottom edge close to the arc edge of the sector area, the included angle between the bottom edge of the trapezoid and one side edge of the middle groove of the outer layer, which is close to the arc edge of the sector area, is an obtuse angle.
9. The rotor punching structure of the permanent magnet synchronous motor for the electric motorcycle according to claim 6, wherein the outer layer slot body comprises two outer layer side slots which are arranged in a V shape and are symmetrically arranged with respect to the central line of the sector area, the opening of the V shape faces the arc edge of the sector area, the outer layer side slots are rectangular, two corners of one side of the outer layer side slot close to the central line of the sector area are respectively provided with an outer layer side convex slot which protrudes outwards, one end of one side of the outer layer side slot far away from the central line of the sector area close to the center of the sector area is provided with an outer layer side convex slot, the protruding direction of the outer layer side convex slot is consistent with the direction of two sides of the outer layer side slot, one end of one side of the outer layer side slot close to the central line of the sector area close to the arc edge of the sector area is provided with an outer layer middle magnetism isolating slot, the outer layer middle magnetism isolating slot is triangular, one side and outer lateral part groove intercommunication in outer middle part magnetism-isolating groove, just the contained angle between the one side that is close to the sector arc limit in this limit of outer middle part magnetism-isolating groove and the other both sides in outer middle part magnetism-isolating groove is the acute angle, one side that sector central line was kept away from in outer lateral part groove is close to the one end department on sector arc limit and is equipped with outer lateral part magnetism-isolating groove, outer lateral part magnetism-isolating groove is triangle-shaped, one side and outer lateral part groove intercommunication in outer lateral part magnetism-isolating groove, just contained angle between the one side that is close to the sector arc limit in this limit of outer lateral part magnetism-isolating groove and the other both sides in outer lateral part magnetism-isolating groove is the acute angle.
10. A permanent magnet synchronous motor rotor for an electric motorcycle is characterized by being formed by superposing a plurality of punching sheets with the permanent magnet synchronous motor rotor punching sheet structure for the electric motorcycle as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210064573.5A CN114362400A (en) | 2022-01-20 | 2022-01-20 | Permanent magnet synchronous motor rotor punching sheet structure for electric motorcycle and rotor thereof |
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| CN202210064573.5A CN114362400A (en) | 2022-01-20 | 2022-01-20 | Permanent magnet synchronous motor rotor punching sheet structure for electric motorcycle and rotor thereof |
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| CN109167449A (en) * | 2018-10-30 | 2019-01-08 | 上海元城汽车技术有限公司 | Motor rotor punching sheet and magneto |
| CN209692565U (en) * | 2019-05-24 | 2019-11-26 | 上海汽车变速器有限公司 | Permanent-magnetic synchronous motor rotor lamination structure |
| CN110729868A (en) * | 2019-09-24 | 2020-01-24 | 江苏迈吉易威电动科技有限公司 | Magnetic steel built-in type double-U-shaped fractional slot concentrated winding permanent magnet motor |
| CN110875655A (en) * | 2018-08-31 | 2020-03-10 | 比亚迪股份有限公司 | Motor rotor, motor and electric automobile |
| CN113241867A (en) * | 2021-06-30 | 2021-08-10 | 擎风电驱动科技(苏州)有限公司 | Permanent magnet synchronous motor rotor punching sheet structure and rotor thereof |
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2022
- 2022-01-20 CN CN202210064573.5A patent/CN114362400A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110875655A (en) * | 2018-08-31 | 2020-03-10 | 比亚迪股份有限公司 | Motor rotor, motor and electric automobile |
| CN109167449A (en) * | 2018-10-30 | 2019-01-08 | 上海元城汽车技术有限公司 | Motor rotor punching sheet and magneto |
| CN209692565U (en) * | 2019-05-24 | 2019-11-26 | 上海汽车变速器有限公司 | Permanent-magnetic synchronous motor rotor lamination structure |
| CN110729868A (en) * | 2019-09-24 | 2020-01-24 | 江苏迈吉易威电动科技有限公司 | Magnetic steel built-in type double-U-shaped fractional slot concentrated winding permanent magnet motor |
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