CN113489182A - High-speed permanent magnet motor rotor punching sheet structure - Google Patents
High-speed permanent magnet motor rotor punching sheet structure Download PDFInfo
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- CN113489182A CN113489182A CN202110565535.3A CN202110565535A CN113489182A CN 113489182 A CN113489182 A CN 113489182A CN 202110565535 A CN202110565535 A CN 202110565535A CN 113489182 A CN113489182 A CN 113489182A
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- rotor punching
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- strip
- shaped
- punching sheet
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- 238000004080 punching Methods 0.000 title claims abstract description 71
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 19
- 238000002955 isolation Methods 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A high-speed permanent magnet motor rotor punching structure comprises a first rotor punching and a second rotor punching, wherein the first rotor punching is a non-oriented silicon steel sheet, the second rotor punching is an oriented silicon steel sheet, a plurality of magnet mounting holes are uniformly distributed in the circumferential direction of the first rotor punching, a plurality of pairs of strip-shaped holes are uniformly distributed in the outer edge of the first rotor punching, the cross section of each pair of strip-shaped holes forms a V-shaped structure which expands along the radial direction, the second rotor punching is composed of a plurality of first sub-modules and a plurality of second sub-modules which are equal in number, the second sub-modules disconnect the communication of the bottoms of the strip-shaped holes of the V-shaped structure to form a magnetic isolation bridge structure, the rotor punching adopts a punching structure formed by mixing oriented silicon steel and non-oriented silicon steel, the requirements of a built-in high-speed permanent magnet motor on high power density and high rotation speed are met, and the rotor punching structure has the advantages of high mechanical structure strength, high rigidity and long service life, The magnetic leakage coefficient is small, the application requirements on a high-speed and high-power permanent magnet motor are effectively met, and the high-speed and high-power permanent magnet motor has better economical efficiency and reliability.
Description
Technical Field
The invention relates to the field of motors, in particular to a permanent magnet motor rotor punching technology, and specifically relates to a high-speed permanent magnet motor rotor punching structure.
Background
The permanent magnet motor has the advantages of high power density, high operation efficiency and the like, and is widely applied to the industry of new energy drive motors at present. Permanent magnet motors can be divided into surface-mounted permanent magnet motors, embedded permanent magnet motors and built-in permanent magnet motors according to the spatial geometric distribution of permanent magnets. The built-in permanent magnet motor is favored in new energy electric vehicle application because of the advantages of large torque density, wide flux weakening range, high operating efficiency and the like.
At present, the mechanical strength and the rigidity of a motor rotor are important technical indexes of a high-speed built-in permanent magnet motor. When the motor runs at a high speed, the magnetic isolation bridge is used as the most easily broken part of the rotor structure of the permanent magnet motor and mainly bears the action of centrifugal force. Meanwhile, the magnetic isolation bridge plays a role of preventing excessive magnetic leakage, so that the magnetic isolation bridge is required to have a slim size in terms of electromagnetic performance. And the magnetic isolation bridge with a long and thin size can generate larger stress under the action of centrifugal force due to small bearing area under the condition of high rotating speed, and the stress often exceeds the yield strength of non-oriented silicon steel materials, so that the strength of the whole rotor structure is insufficient, and the risk is brought to the rotor. And if the design of the magnetic isolation bridge with larger cross section area is adopted, although the strength can be satisfied, the magnetic performance can be weakened. With the development of the new energy motor industry and the higher requirement of high speed on the strength of the motor rotor, the traditional motor rotor punching structure cannot meet the requirements of the built-in permanent magnet motor rotor on high power density and high rotating speed.
Disclosure of Invention
The invention aims to provide a high-speed permanent magnet motor rotor punching structure, which adopts a punching structure formed by mixing oriented silicon steel and non-oriented silicon steel, gives play to the strength performance and the magnetic performance of materials, provides a built-in permanent magnet motor rotor punching structure with high mechanical strength and rigidity and relatively small magnetic leakage coefficient, meets the requirements of the built-in high-speed permanent magnet motor on high power density and high rotating speed, has the advantages of high mechanical structure strength and rigidity, long service life and small magnetic leakage coefficient, and meets the application requirements of the high-speed and high-power permanent magnet motor.
The invention relates to a high-speed permanent magnet motor rotor punching structure, which comprises a first rotor punching sheet and a second rotor punching sheet, wherein the first rotor punching sheet is arranged on an output shaft, the second rotor punching sheet is buckled with the first rotor punching sheet, the first rotor punching sheet is a non-oriented silicon steel sheet, the second rotor punching sheet is an oriented silicon steel sheet, a plurality of magnet mounting holes are uniformly distributed and formed in the circumferential direction of the first rotor punching sheet, a plurality of pairs of strip-shaped holes are uniformly distributed and formed in the outer edge of the first rotor punching sheet, the cross section of each pair of strip-shaped holes forms a V-shaped structure expanding along the radial direction, strip-shaped magnetic steel is arranged in each strip-shaped hole and each magnet mounting hole, the second rotor punching sheet is composed of a plurality of first sub-modules and a plurality of second sub-modules which are equal in number, the first sub-modules are uniformly distributed and connected to the outer circumference of the first rotor punching sheet through a buckle structure and are connected with the tops of the strip-shaped holes of the V-shaped structure, the second sub-modules are installed in the first rotor punching sheet in the radial direction through a buckle structure and located at the bottom of the V-shaped structure strip-shaped hole, and the second sub-modules are disconnected from the bottom of the V-shaped structure strip-shaped hole to form a magnetic isolation bridge structure.
Furthermore, the rotor punching sheets are four pairs of pole rotor punching sheets, three strip-shaped magnetic steels are arranged corresponding to each pole, and the number of the first sub-modules and the number of the second sub-modules are eight.
Furthermore, the second rotor punching sheet and the first rotor punching sheet are connected in a buckling mode through a concave-convex structure.
The working principle of the invention is as follows: in the design and manufacturing process of the rotor punching sheet, the design of the oriented silicon steel magnetic isolation bridge is adopted to replace a non-oriented silicon steel material, the effect that the width of the magnetic isolation bridge is increased and the electromagnetic performance is not influenced is achieved, on the other hand, the yield strength of the oriented silicon steel is larger than that of the non-oriented steel through a proper heat treatment process, and the rotor structure used by the rotor punching sheet is suitable for high rotating speed through the increase of the sectional area and the increase of the mechanical performance of the material.
Compared with the prior art, the invention has positive and obvious effect. The invention adopts the punching sheet structure of mixing the oriented silicon steel and the non-oriented silicon steel, gives play to the strength performance and the magnetic performance of the composite material, realizes the rotor punching sheet structure with high mechanical strength and rigidity and relatively smaller magnetic leakage coefficient, meets the requirements of the built-in high-speed permanent magnet motor on high power density and high rotating speed, has the advantages of high mechanical structure strength and rigidity, long service life and small magnetic leakage coefficient, effectively meets the application requirements on the high-rotating speed and high-power permanent magnet motor, and has better economy and reliability.
Drawings
Fig. 1 is a schematic view of the overall structure of a rotor sheet according to the present invention.
Fig. 2 is a schematic view of a partial structure of a rotor sheet according to the present invention.
Detailed Description
Example 1:
as shown in fig. 1 and fig. 2, the high-speed permanent magnet motor rotor punching structure of the invention includes a first rotor punching 1 mounted on an output shaft and a second rotor punching 2 fastened to the first rotor punching 1, the first rotor punching 1 is provided with lightening holes, the first rotor punching 1 is a non-oriented silicon steel sheet, the second rotor punching 2 is an oriented silicon steel sheet, a plurality of magnet mounting holes 101 are uniformly distributed on the circumference of the first rotor punching 1, a plurality of pairs of strip-shaped holes 102 are uniformly distributed on the outer edge of the first rotor punching 1, the cross section of each pair of strip-shaped holes 102 forms a V-shaped structure expanding along the radial direction, strip-shaped magnetic steels 103 are placed in the strip-shaped holes 102 and the magnet mounting holes 101, the second rotor punching 2 is composed of a plurality of first sub-modules 201 and a plurality of second sub-modules 202 equal in number, the first sub-modules 201 are uniformly distributed on the outer circumference of the first rotor punching 1 through a buckle structure, the sub-second sub-module 202 is installed in the first rotor punching sheet 1 along the radial direction and located at the bottom of the V-shaped structure strip-shaped hole 102 through a buckle structure, the sub-second sub-module 202 breaks communication of the bottom of the V-shaped structure strip-shaped hole 102 to form a magnetic isolation bridge structure, the magnetic isolation bridge structure is located on the second rotor punching sheet 2, the width of the magnetic isolation bridge structure is larger than that of the prior art, mechanical strength and rigidity of the rotor are improved, and due to the fact that the second rotor punching sheet 2 is made of the oriented silicon steel material, the electromagnetic performance of the whole rotor cannot be affected by the increase of the width.
Further, the rotor punching sheet is a four-pair-pole rotor punching sheet, three strip-shaped magnetic steels 103 are arranged corresponding to each pole, and the first sub-module 201 and the second sub-module 202 of the second rotor punching sheet 2 both have 8 identical structures.
Furthermore, the buckling connection mode of the second rotor punching sheet 2 and the first rotor punching sheet 1 is a concave-convex structure, and the installation process of the rotor can be flexibly adjusted according to the requirement by adopting the mode.
Claims (3)
1. The utility model provides a high-speed permanent-magnet machine rotor punching structure which characterized in that: the first rotor punching sheet is a non-oriented silicon steel sheet, the second rotor punching sheet is an oriented silicon steel sheet, a plurality of magnet mounting holes are uniformly distributed in the circumferential direction of the first rotor punching sheet, a plurality of pairs of strip-shaped holes are uniformly distributed at the outer edge of the first rotor punching sheet, the cross section of each pair of strip-shaped holes forms a V-shaped structure which expands along the radial direction, strip-shaped magnetic steel is arranged in each strip-shaped hole and each magnet mounting hole, the second rotor punching sheet is composed of a plurality of first sub-modules and a plurality of second sub-modules which are equal in number, the first sub-modules are uniformly distributed and connected to the outer circumference of the first rotor punching sheet through buckle structures and connected to the top of the V-shaped structure strip-shaped holes, and the second sub-modules are radially mounted in the first rotor punching sheet through the buckle structures and located at the bottoms of the V-shaped structure strip-shaped holes And at the position, the sub-second sub-module disconnects the communication of the bottoms of the strip-shaped holes of the V-shaped structure to form a magnetic isolation bridge structure.
2. The rotor sheet structure of the high-speed permanent magnet motor according to claim 1, wherein: the rotor punching sheet is a four-pair-pole rotor punching sheet, three strip-shaped magnetic steels are arranged corresponding to each pole, and the number of the first sub-modules and the number of the second sub-modules are eight.
3. The rotor sheet structure of the high-speed permanent magnet motor according to claim 1, wherein: the second rotor punching sheet and the first rotor punching sheet are connected in a buckling mode through a concave-convex structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110565535.3A CN113489182A (en) | 2021-05-24 | 2021-05-24 | High-speed permanent magnet motor rotor punching sheet structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110565535.3A CN113489182A (en) | 2021-05-24 | 2021-05-24 | High-speed permanent magnet motor rotor punching sheet structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113489182A true CN113489182A (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110565535.3A Pending CN113489182A (en) | 2021-05-24 | 2021-05-24 | High-speed permanent magnet motor rotor punching sheet structure |
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| CN (1) | CN113489182A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949185A (en) * | 2021-10-15 | 2022-01-18 | 浙江中车尚驰电气有限公司 | Rotor punching sheet compatible with high speed and low speed, rotor and motor thereof |
-
2021
- 2021-05-24 CN CN202110565535.3A patent/CN113489182A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949185A (en) * | 2021-10-15 | 2022-01-18 | 浙江中车尚驰电气有限公司 | Rotor punching sheet compatible with high speed and low speed, rotor and motor thereof |
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