CN213093951U - High-strength magnetic-gathering motor rotor for electric vehicle - Google Patents
High-strength magnetic-gathering motor rotor for electric vehicle Download PDFInfo
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- CN213093951U CN213093951U CN201920339733.6U CN201920339733U CN213093951U CN 213093951 U CN213093951 U CN 213093951U CN 201920339733 U CN201920339733 U CN 201920339733U CN 213093951 U CN213093951 U CN 213093951U
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Abstract
The invention provides a high-strength magnetic concentration motor rotor for an electric vehicle, which comprises a permanent magnet magnetic steel sheet, an end rotor sheet, an N pole magnetic pole rotor sheet, a magnetic pole single sheet, an S pole magnetic pole rotor sheet, a non-magnetic rotor shaft and a pin for fixing a rotor silicon steel sheet. The structure that homopolar is connected has improved the mechanical strength of rotor to further improve the rotational speed of rotor, improve the power density of motor.
Description
Technical Field
The invention belongs to the field of motors for electric vehicles, comprises the field of whole low-speed permanent magnet brushless motors, and relates to a high-strength magnetism-gathering motor rotor for an electric vehicle.
Background
With the rapid development of electric vehicles, consumers have higher requirements for the driving experience of the whole vehicle. The existing electric vehicle motor generally uses a permanent magnet brushless motor, and the motor is made of rotor silicon steel sheets of electrodes in a thin and hollow mode in order to ensure the use efficiency. In order to improve the torque of the motor, the magnetic steel height of a permanent magnet can be only increased, and the radial type magnetism-gathering rotor has the common characteristics that the magnetic leakage of an outer circle magnetic bridge and an inner circle magnetic bridge is serious, and the rotor strength is low, as shown in the attached figure 1. If the strength is improved, the thickness of the magnetic bridge is increased, and the magnetic leakage is increased. If the magnetic leakage is reduced, the magnetic bridge is thinned, and the mechanical strength of the rotor is insufficient. The pair of children contradicts each other, and only two pests can meet each other, so that the pair of children is light and difficult to be taken out.
The structure finally causes the rotor strength of the motor to be reduced, and the overhigh magnetic steel causes the selling price of the product to be increased. Restricting the development of the motor.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention designs the high-strength magnetism-gathering motor rotor for the electric vehicle, which has lower cost and higher performance.
The invention is realized by the following technical scheme:
the invention discloses a high-strength magnetic-gathering motor rotor for an electric vehicle, which comprises: the permanent magnet rotor comprises a permanent magnet magnetic steel sheet, an end rotor sheet, an N-pole magnetic pole rotor sheet, a single magnetic pole sheet, an S-pole magnetic pole rotor sheet, a nonmagnetic rotor shaft and a pin for fixing a rotor silicon steel sheet;
a plurality of N-pole magnetic pole rotor sheets are stacked together, and a plurality of S-pole magnetic pole rotor sheets are stacked together; the N-pole magnetic pole rotor sheet and the S-pole magnetic pole rotor sheet are respectively provided with a plurality of blades.
The gaps of the adjacent blades of the N-pole magnetic pole rotor sheet are filled with single magnetic pole pieces to supplement the axial inter-pole gaps, and the gaps of the adjacent blades of the S-pole magnetic pole rotor sheet are also filled with single magnetic pole pieces.
The end rotor pieces include a front end rotor piece and a rear end rotor piece, which sandwich the N-pole magnetic pole rotor piece, the S-pole magnetic pole rotor piece, and the magnetic pole single piece in the middle.
The fixed rotor sheet rivets the spliced end rotor sheet, the N-pole magnetic pole rotor sheet, the S-pole magnetic pole rotor sheet and the magnetic pole single sheet into a whole by using pins, namely the silicon steel sheet rotor rotating core.
The permanent magnet magnetic steel sheet is pressed into the integral silicon steel sheet rotor core through a press machine, and the permanent magnet magnetic steel sheet is pressed into a gap between the N-pole magnetic pole rotor sheet and the magnetic pole single sheet and a gap between the S-pole magnetic pole rotor sheet and the magnetic pole single sheet along the axial direction.
And finally, pressing the nonmagnetic rotor shaft into a central circular hole of the rotating core of the silicon steel sheet rotor through a press to form a complete motor rotor.
A stack of N pole magnetic pole rotor sheets and magnetic pole single sheets thereof, and a stack of S pole magnetic pole rotor sheets and magnetic pole single sheets thereof rotating by a magnetic pole angle form a group of magnetic pole rotor sheets, and a plurality of groups of magnetic pole rotor sheets are arranged between the front end part rotor sheet and the rear end part rotor sheet.
The blade of the N-pole magnetic pole rotor piece and the blade of the S-pole magnetic pole rotor piece are arranged in a staggered mode, namely the blade of the N-pole magnetic pole rotor piece corresponds to the magnetic pole single piece at the gap of the adjacent blade of the S-pole magnetic pole rotor piece, and the blade of the S-pole magnetic pole rotor piece corresponds to the magnetic pole single piece at the gap of the adjacent blade of the N-pole magnetic pole rotor piece.
The magnetic pole single piece of the N magnetic pole rotor piece is longer than the magnetic pole single piece of the N magnetic pole rotor piece in the axial direction, and the magnetic pole single piece of the S magnetic pole rotor piece is longer than the magnetic pole single piece of the S magnetic pole rotor piece in the axial direction, so that the N pole side and the S pole side are in contact to form cross splicing.
The magnetic pole angle formed by the N-pole magnetic pole rotor sheet and the magnetic pole single sheet is 45 degrees different from the magnetic pole angle formed by the S-pole magnetic pole rotor sheet and the magnetic pole single sheet.
The invention has the beneficial effects that:
the high-strength magnetic-gathering motor rotor for the electric vehicle removes a magnetic bridge between an inner circle and an outer circle of the rotor, greatly reduces magnetic leakage, improves air gap flux density, and accordingly improves torque density of the motor. The structure that homopolar is connected has improved the mechanical strength of rotor to further improve the rotational speed of rotor, improve the power density of motor.
Drawings
Fig. 1, 2 and 3 are a front view, a left view and a perspective view of a conventional permanent magnet brushless motor for an electric vehicle, respectively.
Fig. 4 is an exploded view of the structure of the present invention.
Fig. 5, 6 and 7 are a front view, a left view and a perspective view of the assembled rotor of the present invention (for better embodying the rotor structure, the schematic view of the rotor shaft is not shown).
Fig. 8 is a schematic view of the assembly of parts and the interrelationship of the parts of the present invention.
Fig. 9 is a schematic axial cross-sectional view of the invention (with 2 sets of pole rotor sheets).
In the figure, (1) a nonmagnetic rotor shaft; (2) a permanent magnet magnetic steel sheet; (3) an end rotor sheet; (4) an N-pole magnetic pole rotor sheet; (5) a single magnetic pole piece; (6) an S-pole magnetic pole rotor sheet; (7) pins for fixing the rotor silicon steel sheet, and (8) gaps.
Detailed Description
Fig. 2 and 3 and 4 show an embodiment of the invention.
The invention discloses a high-strength magnetic-gathering motor rotor for an electric vehicle, which comprises: the rotor comprises a permanent magnet magnetic steel sheet (2), an end rotor sheet (3), an N-pole magnetic pole rotor sheet (4), a magnetic pole single sheet (5), an S-pole magnetic pole rotor sheet (6), a nonmagnetic rotor shaft (1) and a pin (7) for fixing a rotor silicon steel sheet;
a plurality of N-pole magnetic pole rotor sheets are stacked together, and a plurality of S-pole magnetic pole rotor sheets are stacked together; the N-pole magnetic pole rotor sheet and the S-pole magnetic pole rotor sheet are respectively provided with a plurality of blades.
The gaps of the adjacent blades of the N-pole magnetic pole rotor sheet are filled with single magnetic pole pieces to supplement the axial inter-pole gaps, and the gaps of the adjacent blades of the S-pole magnetic pole rotor sheet are also filled with single magnetic pole pieces.
The end rotor pieces include a front end rotor piece and a rear end rotor piece, which sandwich the N-pole magnetic pole rotor piece, the S-pole magnetic pole rotor piece, and the magnetic pole single piece in the middle.
The fixed rotor sheet rivets the spliced end rotor sheet, the N-pole magnetic pole rotor sheet, the S-pole magnetic pole rotor sheet and the magnetic pole single sheet into a whole by using pins, namely the silicon steel sheet rotor rotating core.
The permanent magnet magnetic steel sheet is pressed into the integral silicon steel sheet rotor core through a press machine, and the permanent magnet magnetic steel sheet is pressed into a gap between the N-pole magnetic pole rotor sheet and the magnetic pole single sheet and a gap between the S-pole magnetic pole rotor sheet and the magnetic pole single sheet along the axial direction.
And finally, pressing the nonmagnetic rotor shaft into a central circular hole of the rotating core of the silicon steel sheet rotor through a press to form a complete motor rotor.
A stack of N pole magnetic pole rotor sheets and magnetic pole single sheets thereof, and a stack of S pole magnetic pole rotor sheets and magnetic pole single sheets thereof rotating by a magnetic pole angle form a group of magnetic pole rotor sheets, and a plurality of groups of magnetic pole rotor sheets are arranged between the front end part rotor sheet and the rear end part rotor sheet.
The blade of the N-pole magnetic pole rotor piece and the blade of the S-pole magnetic pole rotor piece are arranged in a staggered mode, namely the blade of the N-pole magnetic pole rotor piece corresponds to a gap between adjacent blades of the S-pole magnetic pole rotor piece, and the blade of the S-pole magnetic pole rotor piece corresponds to a gap between adjacent blades of the N-pole magnetic pole rotor piece.
The magnetic pole single piece of the N magnetic pole rotor piece is longer than the magnetic pole single piece of the N magnetic pole rotor piece in the axial direction, and the magnetic pole single piece of the S magnetic pole rotor piece is longer than the magnetic pole single piece of the S magnetic pole rotor piece in the axial direction, so that the N pole side and the S pole side are in contact to form cross splicing.
The magnetic pole angle formed by the N-pole magnetic pole rotor sheet and the magnetic pole single sheet is 45 degrees different from the magnetic pole angle formed by the S-pole magnetic pole rotor sheet and the magnetic pole single sheet.
The front end rotor piece and the rear end rotor piece jointly fix N, S magnetic pole rotor pieces (4, 6) and a single magnetic pole piece (5) inside. Through holes through which pins (7) can pass are reserved on the end rotor sheet (3), the N-pole magnetic pole rotor sheet (4), the magnetic pole single sheet (5) and the S-pole magnetic pole rotor sheet (6) and are riveted together through the pins (7) in a cold pressing mode. Then the permanent magnet magnetic steel sheet (2) is cold-pressed into the silicon steel sheet rotor core through special pressure equipment. And finally, the nonmagnetic rotor shaft (1) is pressed into a central circular hole of the formed silicon steel sheet rotor core in a pressing mode to form a final finished motor rotor assembly.
And a gap for allowing the permanent magnet magnetic steel sheet (2) to pass through is reserved between the N-pole magnetic pole rotor sheet (4) and the magnetic pole single sheet (5). A gap for allowing the permanent magnet magnetic steel sheet (2) to pass through is also reserved between the S pole magnetic pole rotor sheet (6) and the magnetic pole single sheet (5), only the angle formed by the integral magnetic pole formed by the silicon steel sheet and the N pole magnetic pole rotor sheet (4) and the magnetic pole single sheet (5) is 45 degrees, namely the angle of the magnetic pole of the integral formed by inserting the N pole magnetic pole rotor sheet (4) and the magnetic pole single sheet (5) into the permanent magnet magnetic steel sheet (2) is 45 degrees different from the angle of the magnetic pole formed by inserting the S pole magnetic pole rotor sheet (6) and the magnetic pole single sheet (5) into the permanent magnet magnetic steel sheet (2).
The manufacturing process comprises the following steps: in the manufacturing process of the motor assembly, a simple tool is firstly made to fix and form the end rotor sheet (3), the N, S magnetic pole rotor sheets (4) and (6) and the magnetic pole single sheet (5) by using the pin (7). Then the nonmagnetic rotor shaft (1) and the permanent magnet magnetic steel sheet (2) are pressed into the silicon steel sheet rotor core and are spliced and molded.
According to the high-strength magnet-gathering motor rotor mechanism for the electric vehicle, 4 front end rotor sheets (3) are positioned at the front part of a rotor, 24 magnetic pole single sheets (5) (one pile) in gaps among 20N pole rotor sheets and blades of the N pole rotor sheets are attached to the back of the front end rotor sheets (3), and 20S pole rotor sheets (6) rotating by a magnetic pole angle and 24 magnetic pole single sheets (5) (one pile) in gaps among the blades of the S pole rotor sheets are arranged behind the front end rotor sheets. N, S the pole rotor sheet and its respective pole single sheet form a new combination mechanism, the new combination mechanisms are combined and overlapped, and finally four rear end rotor sheets (3) are put at the rear of the rotor. And the components are sequentially stacked according to the combination sequence, and are finally riveted together by using a pin (7) to form a complete rotor structure with a certain thickness.
The N magnetic pole rotor sheet (4) and the magnetic pole single sheet (5), the S magnetic pole rotor sheet (6) and the magnetic pole single sheet (5) form a whole and then have a staggered joint, namely the N magnetic pole rotor sheet faces the magnetic pole single sheet of the S magnetic pole rotor sheet, and the S magnetic pole rotor sheet faces the magnetic pole single sheet of the N magnetic pole rotor sheet, because the magnetic pole single sheet of the N magnetic pole rotor sheet is longer than the N magnetic pole rotor sheet in the axial direction, and the magnetic pole single sheet of the S magnetic pole rotor sheet is longer than the S magnetic pole rotor sheet in the axial direction, the N pole side and the S pole side are in contact with each other to form cross splicing, and the total strength of the rotor silicon steel sheet can be.
Gaps of concentric circles (namely gaps along the radius direction) exist between the N magnetic pole rotor sheet (4) and the magnetic pole single sheet (5) and between the S magnetic pole rotor sheet (6) and the magnetic pole single sheet (5), and the permanent magnet magnetic steel sheets (2) are filled in the gaps.
N, S the magnetic pole rotor sheets (4, 6) and the magnetic pole single sheet (5) have a gap (8) with the thickness of 4 magnetic pole single sheets (silicon steel sheets) in the axial space for locking the magnetism of the permanent magnet magnetic steel sheet (2) and preventing the magnetic leakage.
The end rotor sheets (3) provide positioning and fixing effects for the magnetic pole single sheets (5) at two ends, because N, S magnetic pole rotor sheets (4 and 6) are connected in the same pole, and two magnetic pole rotor sheets have larger gaps in the axial direction, the magnetic field of the permanent magnet magnetic steel sheet (2) can only be coupled through a stator magnetic circuit, the inner circle of the N, S magnetic pole rotor sheet can only play a role in mechanical connection, magnetic leakage is prevented, and the mechanical strength of a rotor assembly is increased.
The invention adopts a separated independent magnetic pole rotor structure. The structure that homopolar connection is adopted and different magnetic poles are separated breaks a magnetic bridge between two poles, greatly reduces magnetic leakage and ensures enough mechanical strength. The problems of magnetic flux leakage and mechanical strength are completely solved.
Claims (5)
1. The utility model provides a high strength gathers magnetism electric motor rotor for electric motor car which characterized in that: the method comprises the following steps: the permanent magnet rotor comprises a permanent magnet magnetic steel sheet, an end rotor sheet, an N-pole magnetic pole rotor sheet, a single magnetic pole sheet, an S-pole magnetic pole rotor sheet, a nonmagnetic rotor shaft and a pin for fixing a rotor silicon steel sheet;
a plurality of N-pole magnetic pole rotor sheets are stacked together, and a plurality of S-pole magnetic pole rotor sheets are stacked together; the N-pole magnetic pole rotor sheet and the S-pole magnetic pole rotor sheet are respectively provided with a plurality of blades;
gaps of adjacent blades of the N-pole magnetic pole rotor sheet are filled with single magnetic pole pieces to supplement axial inter-pole gaps, and gaps of adjacent blades of the S-pole magnetic pole rotor sheet are filled with single magnetic pole pieces;
the end rotor sheets comprise a front end rotor sheet and a rear end rotor sheet, and the N-pole magnetic pole rotor sheet, the S-pole magnetic pole rotor sheet and the magnetic pole single sheet are clamped in the middle positions by the front end rotor sheet and the rear end rotor sheet;
the fixed rotor sheet rivets the spliced end rotor sheet, the N-pole magnetic pole rotor sheet, the S-pole magnetic pole rotor sheet and the magnetic pole single sheet into a whole by using pins, namely the silicon steel sheet rotor rotating core;
the permanent magnet magnetic steel sheet is pressed into a gap between the N pole magnetic pole rotor sheet and the magnetic pole single sheet and a gap between the S pole magnetic pole rotor sheet and the magnetic pole single sheet along the axial direction;
the nonmagnetic rotor shaft is pressed into a central circular hole of the rotating core of the silicon steel sheet rotor through a press machine to form a complete motor rotor.
2. The high-strength flux-concentrating motor rotor for electric vehicles according to claim 1, characterized in that: a stack of N pole magnetic pole rotor sheets and magnetic pole single sheets thereof, and a stack of S pole magnetic pole rotor sheets and magnetic pole single sheets thereof rotating by a magnetic pole angle form a group of magnetic pole rotor sheets, and a plurality of groups of magnetic pole rotor sheets are arranged between the front end part rotor sheet and the rear end part rotor sheet.
3. The high-strength flux-concentrating motor rotor for electric vehicles according to claim 1, characterized in that: the blade of the N-pole magnetic pole rotor piece and the blade of the S-pole magnetic pole rotor piece are arranged in a staggered mode, namely the blade of the N-pole magnetic pole rotor piece corresponds to the magnetic pole single piece at the gap of the adjacent blade of the S-pole magnetic pole rotor piece, and the blade of the S-pole magnetic pole rotor piece corresponds to the magnetic pole single piece at the gap of the adjacent blade of the N-pole magnetic pole rotor piece.
4. The high-strength flux-concentrating motor rotor for electric vehicles according to claim 3, characterized in that: the magnetic pole single piece of the N magnetic pole rotor piece is longer than the magnetic pole single piece of the N magnetic pole rotor piece in the axial direction, and the magnetic pole single piece of the S magnetic pole rotor piece is longer than the magnetic pole single piece of the S magnetic pole rotor piece in the axial direction, so that the N pole side and the S pole side are in contact to form cross splicing.
5. The high-strength flux-concentrating motor rotor for electric vehicles according to claim 1, characterized in that: the magnetic pole angle formed by the N-pole magnetic pole rotor sheet and the magnetic pole single sheet is 45 degrees different from the magnetic pole angle formed by the S-pole magnetic pole rotor sheet and the magnetic pole single sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920339733.6U CN213093951U (en) | 2019-03-18 | 2019-03-18 | High-strength magnetic-gathering motor rotor for electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920339733.6U CN213093951U (en) | 2019-03-18 | 2019-03-18 | High-strength magnetic-gathering motor rotor for electric vehicle |
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| Publication Number | Publication Date |
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| CN213093951U true CN213093951U (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920339733.6U Active CN213093951U (en) | 2019-03-18 | 2019-03-18 | High-strength magnetic-gathering motor rotor for electric vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109873512A (en) * | 2019-03-18 | 2019-06-11 | 山东鲁阔车辆制造有限公司 | The electronic automobile-used poly- magneto rotor of high intensity |
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2019
- 2019-03-18 CN CN201920339733.6U patent/CN213093951U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109873512A (en) * | 2019-03-18 | 2019-06-11 | 山东鲁阔车辆制造有限公司 | The electronic automobile-used poly- magneto rotor of high intensity |
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