CN112436687B - Magnetizing device and radial magnetizing method for arc-shaped magnetic shoe of permanent magnet motor - Google Patents
Magnetizing device and radial magnetizing method for arc-shaped magnetic shoe of permanent magnet motor Download PDFInfo
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- CN112436687B CN112436687B CN202011394767.9A CN202011394767A CN112436687B CN 112436687 B CN112436687 B CN 112436687B CN 202011394767 A CN202011394767 A CN 202011394767A CN 112436687 B CN112436687 B CN 112436687B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention provides a magnetizing device and a radial magnetizing method for a circular arc-shaped magnetic shoe of a permanent magnet motor, wherein the magnetizing device comprises an inner magnetic pole, an outer magnetic pole, a magnetic yoke ring, an exciting coil and a magnetizing power supply; the inner magnetic pole comprises a cylindrical middle part, the exciting coil is wound on the periphery of the cylindrical middle part of the inner magnetic pole, and two ends of the exciting coil are electrically connected with the magnetizing power supply; two ends of the inner magnetic pole face to one outer magnetic pole respectively, and a magnetizing space for placing a magnetic shoe to be magnetized is arranged between the end face of the inner magnetic pole and the end face of the opposite outer magnetic pole; the inner magnetic pole is positioned in the magnetic yoke ring, and one end of the outer magnetic pole, which is far away from the inner magnetic pole, is connected with the magnetic yoke ring. When magnetizing, the magnetic tile is placed in the magnetizing space and attached to the outer magnetic pole and the inner magnetic pole, and the magnetizing power supply is started to discharge instantly to generate a strong excitation magnetic field to complete the magnetizing. The invention can conveniently carry out radial magnetization on the arc-shaped magnetic shoe, so that the partially installed motor magnetic shoe can provide a more reasonably distributed magnetic field in the motor air gap, and the motor performance is improved.
Description
Technical Field
The invention relates to the technical field of processing and manufacturing of permanent magnet motors and parts thereof, in particular to a magnetizing device and a radial magnetizing method for arc-shaped magnetic shoes of a permanent magnet motor.
Background
In the permanent magnet motor, the magnetizing modes generally include thickness magnetizing (see fig. 5), radial magnetizing (see fig. 6), axial magnetizing and the like, wherein the axial magnetizing is not applied in the motor, the thickness magnetizing is simple, magnetic sheets or magnetic tiles are overlapped together, the sheets are separated by a plastic plate and wrapped into a long strip, the strip is placed in a magnetizing tunnel of a magnetizing machine, and the instant discharging of the magnetizing machine is completed. Radial magnetization is relatively troublesome, and basically, the radial magnetization is assembled into parts to perform integral magnetization, so that the production efficiency is low.
Referring to fig. 3 for the thickness-magnetized motor magnetic circuit and fig. 4 for the radial-magnetized motor magnetic circuit, it can be seen that, compared with the thickness-magnetized motor magnetic field, the radial-magnetized motor magnetic field (arc magnetic shoe motor) has a more reasonable distribution in the motor air gap, and the tangential force along the circumference of the rotor can be generated more, so that the efficiency is better. Therefore, in practical application, if the motor magnetic shoe for magnetizing in thickness can be changed into the magnetic shoe for magnetizing in radial direction, the performance of the motor can be improved, but the problem of production efficiency of radial magnetizing is always a limiting factor for selecting a radial magnetizing mode in practical application.
Disclosure of Invention
The invention aims to provide a magnetizing device and a radial magnetizing method for a permanent magnet motor arc-shaped magnetic shoe, which can conveniently and radially magnetize the arc-shaped magnetic shoe, so that the assembled motor magnetic shoe can provide a magnetic field with more reasonable distribution in a motor air gap, and the motor performance is improved.
The technical scheme adopted by the invention is as follows: a magnetizing device for a circular arc magnetic shoe of a permanent magnet motor comprises an inner magnetic pole, an outer magnetic pole, a magnetic yoke ring, an exciting coil and a magnetizing power supply;
the inner magnetic pole comprises a cylindrical middle part, the exciting coil is wound on the periphery of the cylindrical middle part of the inner magnetic pole, and two ends of the exciting coil are electrically connected with the magnetizing power supply;
two ends of the inner magnetic pole face to one outer magnetic pole respectively, and a magnetizing space for placing a magnetic shoe to be magnetized is arranged between the end face of the inner magnetic pole and the end face of the opposite outer magnetic pole;
the inner magnetic pole is positioned in the magnetic yoke ring, and one end of the outer magnetic pole, which is far away from the inner magnetic pole, is connected with the magnetic yoke ring.
In application, when the magnetic shoe needs to be magnetized, the magnetic shoe is placed in the magnetizing space and attached to the outer magnetic pole and the inner magnetic pole, and the magnetizing power supply is started to discharge instantly to generate a strong excitation magnetic field so as to complete radial magnetizing of the magnetic shoe. The magnetizing space can be set as required, and the magnetizing device can be suitable for magnetizing magnetic tiles with different quantities.
Optionally, the magnetizing device further includes air cylinders respectively disposed corresponding to the outer magnetic poles, and a free end of a piston rod of the air cylinder faces the outer magnetic poles to drive the outer magnetic poles to move toward an end of the inner magnetic pole.
Optionally, the cylinder is located outside the yoke ring, and one end of the outer magnetic pole, which is away from the inner magnetic pole, is connected to the inner ring of the yoke ring. When the piston rod of the cylinder extends, the magnetic yoke ring of the section connected with the outer magnetic pole is directly pushed, and then the outer magnetic pole on the inner side of the magnetic yoke ring is driven to move to the magnetizing space, so that the outer magnetic pole, the magnetic shoe and the inner magnetic pole can be reliably butted when magnetizing.
Optionally, the opposite end surfaces of the outer magnetic pole and the inner magnetic pole are arc surfaces and are respectively adapted to the shapes of the two surfaces of the circular arc magnetic shoe to be magnetized. The design can make the effective contact surface between the surface of the magnetic shoe to be magnetized and the inner and outer magnetic poles larger during magnetization, and provide a transmission path with a larger range for magnetic lines of force, thereby realizing higher magnetization efficiency.
Optionally, the two arc end faces of the inner magnetic pole, the arc end face of the outer magnetic pole facing the inner magnetic pole and the arc magnetic shoe to be magnetized have the same bending radian and are radially overlapped. Can realize higher magnetic force line conduction efficiency, thereby achieving better magnetizing efficiency.
Optionally, the yoke ring is circular or elliptical. Other closed loop shapes may also be selected.
The invention also provides a magnetizing method of the magnetizing device, which comprises the following steps:
respectively placing 2 groups of magnetic shoes into magnetizing spaces at two sides of an inner magnetic pole;
the outer magnetic pole is driven to move towards the inner magnetic pole direction by controlling the action of the air cylinder until the outer magnetic pole, the magnetic shoe and the inner magnetic pole are attached;
and starting the magnetizing power supply to discharge instantly to complete the magnetizing of the magnetic shoe.
Optionally, in each set of magnetic tiles, the number of the magnetic tiles is 1 or more, and a plurality of magnetic tiles are stacked in parallel.
Advantageous effects
In the magnetizing device, the inner magnetic pole, the outer magnetic pole and the magnetic yoke ring are structurally matched, so that a magnetizing space capable of radially magnetizing the magnetic shoe is realized, the magnetizing efficiency is high, meanwhile, the effective joint among the inner magnetic pole, the magnetic shoe and the outer magnetic pole can be ensured by combining the design of the air cylinder during magnetizing, a wider range of magnetic force line paths are provided, and the magnetizing effect is further improved. The magnetic shoe magnetized by the magnetizing device and the magnetizing method is assembled and used for the permanent magnet motor, so that a more reasonably distributed magnetic field can be provided in the air gap of the motor, and the performance of the motor is improved.
Drawings
FIG. 1 is a schematic view of an applied structure of a magnetizing apparatus according to the present invention;
FIG. 2 is a schematic view showing the structure of the inner magnetic pole, the outer magnetic pole, the yoke ring and the magnetic shoe during magnetizing in the magnetizing apparatus of the present invention;
FIG. 3 is a schematic view of a magnetizing magnetic circuit with a conventional thickness;
FIG. 4 is a schematic view of a conventional radial magnetizing magnetic circuit;
FIG. 5 is a schematic view of a conventional radial magnetization method;
fig. 6 is a schematic view illustrating a conventional thickness magnetizing method.
Detailed Description
The following further description is made in conjunction with the accompanying drawings and the specific embodiments.
Referring to fig. 1, the magnetizing device for the circular arc-shaped magnetic shoe of the permanent magnet motor of the present invention comprises an inner magnetic pole 2, an outer magnetic pole 3, a yoke ring 4, an exciting coil 5 and a magnetizing power supply 7; the inner magnetic pole comprises a cylindrical middle part, the exciting coil is wound on the periphery of the cylindrical middle part of the inner magnetic pole, and two ends of the exciting coil are electrically connected with the magnetizing power supply; two ends of the inner magnetic pole face to one outer magnetic pole respectively, and a magnetizing space for placing a magnetic shoe to be magnetized is arranged between the end face of the inner magnetic pole and the end face of the opposite outer magnetic pole; the inner magnetic pole is positioned in the magnetic yoke ring, and one end of the outer magnetic pole, which is deviated from the inner magnetic pole, is connected with the magnetic yoke ring.
In application, when the magnetic shoe needs to be magnetized, the magnetic shoe is placed in the magnetizing space and attached to the outer magnetic pole and the inner magnetic pole, and the magnetizing power supply is started to discharge instantly to generate a strong excitation magnetic field so as to complete radial magnetizing of the magnetic shoe. The magnetizing space can be set as required, and the magnetizing device can be suitable for magnetizing magnetic tiles with different quantities.
Examples
In the embodiment shown in fig. 1, the magnetizing apparatus includes an inner magnetic pole 2, an outer magnetic pole 3, a yoke ring 4, an exciting coil 5, a magnetizing power source 7, and a cylinder 6 disposed corresponding to each outer magnetic pole, wherein a free end of a cylinder rod of the cylinder faces the outer magnetic pole to drive the outer magnetic pole to move toward an end of the inner magnetic pole.
The cylinder is located the yoke ring outside, and the outer magnetic pole deviates from the inner magnetic pole's one end and connects in the inner ring of yoke ring. When the piston rod of the cylinder extends, the magnetic yoke ring of the section connected with the outer magnetic pole is directly pushed, and then the outer magnetic pole on the inner side of the magnetic yoke ring is driven to move to the magnetizing space, so that the outer magnetic pole, the magnetic shoe and the inner magnetic pole can be reliably butted when magnetizing.
In order to ensure that the two side surfaces of the magnetic shoe can be respectively and effectively attached to the end surfaces of the outer magnetic pole and the inner magnetic pole when the magnetic shoe is magnetized, and a wider magnetic line circulation path is allowed, in the embodiment: the opposite end surfaces of the inner magnetic pole and the outer magnetic pole are arc surfaces and are respectively adapted to the shapes of two surfaces of the circular arc magnetic shoe to be magnetized; preferably, the two arc end faces of the inner magnetic pole, the arc end face of the outer magnetic pole facing the inner magnetic pole and the arc magnetic shoe to be magnetized are consistent in bending radian and are radially overlapped. Can realize higher magnetic force line conduction efficiency, thereby achieving better magnetizing efficiency.
The magnetic yoke ring is circular or elliptical, and other closed ring shapes can be selected. The inner and outer magnetic poles can be replaced and matched according to the size requirement of the circular arc magnetic shoe, so that the magnetic shoe is suitable for radial magnetization of various circular arc magnetic shoes.
In consideration of the charging and discharging heating problem of the exciting coil, the exciting coil can be cooled by water cooling or air cooling according to the possible heating degree, namely, the magnetizing device is additionally provided with a water cooling or air cooling device. In order to fully excite the magnetic shoe, enough margin can be left for the exciting coil in design.
The magnetizing method using the magnetizing device comprises the following steps:
respectively placing 2 groups of magnetic shoes into magnetizing spaces at two sides of an inner magnetic pole; in each group of magnetic shoes, the number of the magnetic shoes is 1 or more, if the magnetic shoes are a plurality of magnetic shoes, the magnetic shoes are parallelly superposed between the outer arc surface of the inner magnetic pole and the inner arc surface of the outer magnetic pole in the same radian direction;
controlling the cylinder to act, butting against the yoke ring at the magnetic shoe, and driving the outer magnetic pole to move towards the inner magnetic pole so as to firmly attach the magnetic shoe to the two magnetic poles;
starting the magnetizing machine to discharge instantly to generate a strong excitation magnetic field, and completing the radial magnetizing of the circular arc magnetic shoe.
After the magnetizing is finished, the magnetic yoke ring is loosened to abut against the air cylinder, and the magnetic shoe is taken out by adopting a corresponding tool for production and use.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A magnetizing device for a circular arc-shaped magnetic shoe of a permanent magnet motor is characterized by comprising an inner magnetic pole, an outer magnetic pole, a yoke ring, an exciting coil and a magnetizing power supply;
the inner magnetic pole comprises a cylindrical middle part, the exciting coil is wound on the periphery of the cylindrical middle part of the inner magnetic pole, and two ends of the exciting coil are electrically connected with the magnetizing power supply;
two ends of the inner magnetic pole face to one outer magnetic pole respectively, and a magnetizing space for placing a magnetic shoe to be magnetized is arranged between the end face of the inner magnetic pole and the end face of the opposite outer magnetic pole; the opposite end surfaces of the outer magnetic pole and the inner magnetic pole are arc surfaces and are respectively adapted to the shapes of two surfaces of the circular arc magnetic shoe to be magnetized; the two arc end surfaces of the inner magnetic pole, the arc end surface of the outer magnetic pole facing the inner magnetic pole and the arc magnetic shoe to be magnetized have the same bending radian and are radially superposed;
the inner magnetic pole is positioned in the magnetic yoke ring, and one end of the outer magnetic pole, which is far away from the inner magnetic pole, is connected with the magnetic yoke ring;
the magnetic yoke is characterized by also comprising air cylinders which are respectively arranged corresponding to the outer magnetic poles, wherein the air cylinders are positioned outside the magnetic yoke ring, and one ends of the outer magnetic poles, which are far away from the inner magnetic poles, are connected to the inner ring of the magnetic yoke ring; the free end of the cylinder piston rod faces the outer magnetic pole so as to drive the outer magnetic pole to move towards the end part of the inner magnetic pole.
2. The device for magnetizing the circular arc-shaped magnetic shoe of the permanent magnet motor as claimed in claim 1, wherein the yoke ring is circular or elliptical.
3. A method for magnetizing a device for magnetizing a circular arc-shaped magnetic shoe of a permanent magnet motor according to claim 1 or 2, comprising:
respectively placing 2 groups of magnetic shoes into magnetizing spaces at two sides of an inner magnetic pole;
the outer magnetic pole is driven to move towards the inner magnetic pole direction by controlling the action of the air cylinder until the outer magnetic pole, the magnetic shoe and the inner magnetic pole are attached;
and starting the magnetizing power supply to discharge instantly to complete the magnetizing of the magnetic shoe.
4. The magnetizing method of claim 3, wherein the number of the magnetic tiles in each set of magnetic tiles is 1 or more, and a plurality of magnetic tiles are stacked side by side up and down.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011394767.9A CN112436687B (en) | 2020-12-03 | 2020-12-03 | Magnetizing device and radial magnetizing method for arc-shaped magnetic shoe of permanent magnet motor |
| PCT/CN2020/133772 WO2022116127A1 (en) | 2020-12-03 | 2020-12-04 | Magnetizing device for arc tile-shaped magnets of permanent magnet motor and radial magnetizing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011394767.9A CN112436687B (en) | 2020-12-03 | 2020-12-03 | Magnetizing device and radial magnetizing method for arc-shaped magnetic shoe of permanent magnet motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112436687A CN112436687A (en) | 2021-03-02 |
| CN112436687B true CN112436687B (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011394767.9A Active CN112436687B (en) | 2020-12-03 | 2020-12-03 | Magnetizing device and radial magnetizing method for arc-shaped magnetic shoe of permanent magnet motor |
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| Country | Link |
|---|---|
| CN (1) | CN112436687B (en) |
| WO (1) | WO2022116127A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115049027B (en) * | 2022-08-17 | 2022-11-11 | 深圳市恒拓高工业技术股份有限公司 | Method and device for identifying good motor products based on neural network |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1551286A (en) * | 1975-09-30 | 1979-08-30 | Bosch Gmbh Robert | Magnetizing devices for permanent magnets of electric motors |
| JPS55156309A (en) * | 1979-05-24 | 1980-12-05 | Matsushita Electric Ind Co Ltd | Magnetization of annular magnet |
| JPS5843167A (en) * | 1981-09-08 | 1983-03-12 | Mitsubishi Electric Corp | Magnetizing device for field assembly |
| JPS61189157A (en) * | 1985-02-15 | 1986-08-22 | Sanyo Electric Co Ltd | Magnet magnetizing device |
| US6813844B1 (en) * | 2002-03-08 | 2004-11-09 | Asm Automation Sensorik Messtechnick Gmbh | Magnetization of magnetic measuring bodies |
| CN105469929A (en) * | 2015-12-04 | 2016-04-06 | 重庆智仁发电设备有限责任公司 | Rotor core tile-shaped magnet magnetizing apparatus for direct current motor |
-
2020
- 2020-12-03 CN CN202011394767.9A patent/CN112436687B/en active Active
- 2020-12-04 WO PCT/CN2020/133772 patent/WO2022116127A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1551286A (en) * | 1975-09-30 | 1979-08-30 | Bosch Gmbh Robert | Magnetizing devices for permanent magnets of electric motors |
| JPS55156309A (en) * | 1979-05-24 | 1980-12-05 | Matsushita Electric Ind Co Ltd | Magnetization of annular magnet |
| JPS5843167A (en) * | 1981-09-08 | 1983-03-12 | Mitsubishi Electric Corp | Magnetizing device for field assembly |
| JPS61189157A (en) * | 1985-02-15 | 1986-08-22 | Sanyo Electric Co Ltd | Magnet magnetizing device |
| US6813844B1 (en) * | 2002-03-08 | 2004-11-09 | Asm Automation Sensorik Messtechnick Gmbh | Magnetization of magnetic measuring bodies |
| CN105469929A (en) * | 2015-12-04 | 2016-04-06 | 重庆智仁发电设备有限责任公司 | Rotor core tile-shaped magnet magnetizing apparatus for direct current motor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022116127A1 (en) | 2022-06-09 |
| CN112436687A (en) | 2021-03-02 |
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