CN209913593U - Permanent magnet rotor with herringbone magnetic poles - Google Patents
Permanent magnet rotor with herringbone magnetic poles Download PDFInfo
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- CN209913593U CN209913593U CN201921064551.9U CN201921064551U CN209913593U CN 209913593 U CN209913593 U CN 209913593U CN 201921064551 U CN201921064551 U CN 201921064551U CN 209913593 U CN209913593 U CN 209913593U
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Abstract
The utility model provides a permanent magnet rotor with chevron shape magnetic pole, includes that a plurality of appearances are tile form permanent magnet, the yoke of cylinder, the clamp plate of parallelogram, its characterized in that: the tile-shaped permanent magnet of the front-section parallelogram and the tile-shaped permanent magnet of the rear-section parallelogram have the same polarity, the tile-shaped permanent magnet of the front-section parallelogram and the tile-shaped permanent magnet of the rear-section parallelogram are connected to form a herringbone magnetic pole, the polarities of the herringbone magnetic poles adjacent in the circumferential direction are opposite, the two adjacent herringbone magnetic poles are separated by a pressing plate, oblique planes are processed on the tile-shaped permanent magnet of the parallelogram along the axial two sides, the two sides of the pressing plate are processed into inclined planes, and a screw radially penetrates through the magnetic yoke to be connected with the pressing plate so as to fix the outer arc surface of the pressing plate on. Compared with the prior art, the utility model. The method has the advantages of eliminating the cogging torque, reducing the ripple torque, along with convenient processing, low cost and reliable work.
Description
Technical Field
The utility model relates to a motor technology.
Background
The permanent magnet motor with the outer rotor structure has a simple structure, so that the permanent magnet rotor with the outer rotor structure is very widely applied, for example: synchronous hauler of permanent magnetism, in-wheel motor, aerogenerator etc. the permanent magnet of outer rotor structure is the tile form usually, and the outer disc of permanent magnet is hugged closely with the interior disc of yoke, for eliminating tooth's socket torque, reducing ripple torque and noise reduction, all makes the permanent magnet oblique utmost point usually to bond the interior disc at the yoke with oblique utmost point permanent magnet with glue, the problem that this kind of rotor exists is:
1. when the axial size of the rotor is larger, the axial size of the tile-shaped permanent magnet is larger, the processing is inconvenient, and the manufacturability is poor;
2. once the glue fails or ages for a long time, the permanent magnet is easy to fall off.
Chinese patent 2013101947127 proposes a magnetic pole structure of an external rotor permanent magnet generator, because the structure is formed by a front section rotor and a rear section rotor, the front section rotor adopts a plurality of parallelogram's permanent magnet to install side by side, form the oblique pole of constituteing by the polylith permanent magnet, the rear section rotor adopts polylith parallelogram's permanent magnet to install side by side equally, the front and rear two sections rotor permanent magnet incline opposite direction, make the magnetic pole form humanoid structure after the combination, the problem such as tooth's socket torque, torque ripple and noise has been solved to this structure, but this structure still has following problem:
1. the rotors are divided into front and rear two sections of rotors which must be concentric, so that a strict centering device is required to ensure that the rotors have complex structures
2. Each magnetic pole is composed of a plurality of parallelogram permanent magnets, the division bar for compressing the permanent magnets is long, a plurality of mounting holes are processed, a plurality of screw holes are also formed on the corresponding rotor magnetic yoke, in order to ensure that the division bar can attach the plurality of parallelogram permanent magnets, the plurality of screw holes corresponding to each magnetic pole are required to be strictly controlled in the circumferential direction, in addition, the number of processing holes is large, the precision requirement is high, and the processing difficulty is large;
3. the requirement on circumferential positioning of the front and rear rotors is high, otherwise, the front and rear magnetic poles cannot be aligned, and the symmetrical herringbone magnetic poles cannot be formed.
Therefore, the structure is not suitable for the outer rotor structure permanent magnet motor with small volume, light weight and cost requirements, and is only suitable for large-scale generators with large volume, thereby limiting the application field of the technology.
Disclosure of Invention
The invention aims to provide a permanent magnet rotor with herringbone magnetic poles, which not only eliminates the cogging torque and reduces the pulsation torque, but also has the advantages of convenient processing, low cost and reliable work.
The utility model discloses a realize like this: including a plurality of appearances for parallelogram's tile form permanent magnet, the yoke of cylinder, clamp plate, the outer arc laminating of tile form permanent magnet is on the arc surface in the yoke of cylinder, and the tile form permanent magnet that is located a parallelogram of anterior segment and the tile form permanent magnet axial that is located a parallelogram of back end make up into a magnetic pole, and the several magnetic pole evenly sets up its characterized in that along the circumferencial direction of the yoke inner chamber of cylinder: the tile-shaped permanent magnet of the front parallelogram and the tile-shaped permanent magnet of the rear parallelogram have the same polarity, the tile-shaped permanent magnet of the front parallelogram and the tile-shaped permanent magnet of the rear parallelogram are connected to form a herringbone magnetic pole, the polarities of the herringbone magnetic poles adjacent in the circumferential direction are opposite, two adjacent herringbone magnetic poles are separated by a pressing plate positioned at the rear section and a pressing plate positioned at the front section, the tile-shaped permanent magnet of the parallelogram is provided with oblique planes along the axial two sides, the two sides of the pressing plate are processed into inclined planes matched with the oblique planes of the tile-shaped permanent magnets of the parallelogram, the inclined planes of the pressing plate are tightly attached to the inclined planes of the tile-shaped permanent magnets of the adjacent parallelogram, and a screw radially penetrates through the magnet yoke to be connected with the pressing plate so as to fix the outer.
Compared with the prior art, the invention has the following beneficial effects:
1. the herringbone magnetic poles can reduce the cogging torque, the pulsation torque, the electromagnetic noise and the vibration of the motor, and the output counter electromotive force waveform is closer to a sine wave, thereby being more beneficial to debugging of a controller;
2. the two pieces of magnetic steel form a herringbone structure and are completely symmetrical, the two screws penetrating through the magnetic yoke and connected with the pressing plate are in the same position in the circumferential direction and are in a straight line in the axial direction, only the indexing of the magnetic pole needs to be considered during processing, the dislocation of the two screw holes does not need to be considered, and the processing is simple and convenient and has low cost;
3. a plurality of pieces of magnetic steel are adopted for a single magnetic pole, and the axial size of the permanent magnet rotor can be increased, so that the permanent magnet is more convenient to process and has good manufacturability;
4. mechanical fixation, no glue aging problem and good reliability.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a half sectional view of the present invention;
FIG. 3 is a quarter section A-A of FIG. 2;
FIG. 4 is an enlarged partial view of FIG. 1;
FIG. 5 is a front structure view of the front and rear permanent magnet assembly of the present invention;
fig. 6 is a structure view of the pressing plate of the present invention.
Description of the sequence numbers
The magnetic yoke comprises a magnetic yoke 1, a tile-shaped permanent magnet 2 of a front section S-pole parallelogram, a tile-shaped permanent magnet 3 of a rear section S-pole parallelogram, a tile-shaped permanent magnet 4 of a front section N-pole parallelogram, a tile-shaped permanent magnet 5 of a rear section N-pole parallelogram, a pressing plate 6, a screw 7, a tile-shaped permanent magnet oblique cutting surface 2a of an N-pole parallelogram, a tile-shaped permanent magnet oblique cutting surface 4a of an S-pole parallelogram, an oblique surface 6a of the pressing plate and a screw hole 6b of the pressing plate 6.
Examples
The invention will now be described in further detail with reference to the accompanying drawings and examples:
referring to fig. 1 to 4, a permanent magnet rotor with herringbone magnetic poles includes a plurality of tile-shaped permanent magnets 2, 3, 4, 5 with parallelogram shape, a cylindrical magnetic yoke 1, and a pressing plate 6, wherein the outer arc surfaces of the tile-shaped permanent magnets 2, 3, 4, 5 are attached to the inner arc surface of the cylindrical magnetic yoke 1, and the permanent magnet rotor is characterized in that: the magnetic pole is formed by axially combining tile-shaped permanent magnets 2 and 4 of a front-section parallelogram and tile-shaped permanent magnets 3 and 5 of a rear-section parallelogram, the tile-shaped permanent magnets 2 and 4 of the front-section parallelogram are the same in polarity as the tile-shaped permanent magnets 3 and 5 of the rear-section parallelogram, the end faces of the tile-shaped permanent magnets 2 and 4 of the front-section parallelogram and the tile-shaped permanent magnets 3 and 5 of the rear-section parallelogram are connected to form a herringbone magnetic pole, the polarities of the herringbone magnetic poles adjacent in the circumferential direction are opposite (for example, the polarity of the herringbone magnetic pole formed by one tile-shaped permanent magnet 2 of the front-section S-pole parallelogram and the tile-shaped permanent magnet 3 of the rear-section S-pole parallelogram is S-pole, the polarity of the herringbone magnetic pole formed by the tile-shaped permanent magnet 3 of the front-section N-pole parallelogram and the tile-shaped permanent magnet 5 of the rear-section N-pole parallelogram is N-pole), and two adjacent herringbone magnetic poles are separated The oblique planes (the oblique planes 2a of the tile-shaped permanent magnets of the N-pole parallelogram and the oblique planes 4a of the tile-shaped permanent magnets of the S-pole parallelogram) are processed on two sides of the parallelogram 2, 3, 4 and 5 along the axial direction, the oblique planes 6a matched with the oblique planes 2a and 4a of the tile-shaped permanent magnets of the parallelogram 6 are processed on two sides of the pressing plate 6, the oblique plane of the pressing plate 6a is tightly attached to the oblique planes 2a and 4a of the tile-shaped permanent magnets 2, 3, 4 and 5 of the adjacent parallelogram, and the screw 7 radially penetrates through the magnet yoke 1 to be screwed in the screw hole 6b of the pressing plate 6 to be connected with the pressing plate 6 so as to fix the outer arc surface of the pressing plate 6 on the inner arc.
Claims (1)
1. The utility model provides a permanent magnet rotor with chevron magnetic pole, includes that a plurality of appearances are parallelogram's tile form permanent magnet, the yoke of cylinder, clamp plate, and the outer arc surface laminating of tile form permanent magnet is on the arc surface in the yoke of cylinder, and the tile form permanent magnet that is located a parallelogram of anterior segment and the tile form permanent magnet axial that is located a parallelogram of back end make up into a magnetic pole, and the several magnetic pole evenly sets up its characterized in that along the circumferencial direction of the yoke inner chamber of cylinder: the tile-shaped permanent magnet of the front parallelogram and the tile-shaped permanent magnet of the rear parallelogram have the same polarity, the tile-shaped permanent magnet of the front parallelogram and the tile-shaped permanent magnet of the rear parallelogram are connected to form a herringbone magnetic pole, the polarities of the herringbone magnetic poles adjacent in the circumferential direction are opposite, two adjacent herringbone magnetic poles are separated by a pressing plate positioned at the rear section and a pressing plate positioned at the front section, the tile-shaped permanent magnet of the parallelogram is provided with oblique planes along the axial two sides, the two sides of the pressing plate are processed into inclined planes matched with the oblique planes of the tile-shaped permanent magnets of the parallelogram, the inclined planes of the pressing plate are tightly attached to the inclined planes of the tile-shaped permanent magnets of the adjacent parallelogram, and a screw radially penetrates through the magnet yoke to be connected with the pressing plate so as to fix the outer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921064551.9U CN209913593U (en) | 2019-07-09 | 2019-07-09 | Permanent magnet rotor with herringbone magnetic poles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921064551.9U CN209913593U (en) | 2019-07-09 | 2019-07-09 | Permanent magnet rotor with herringbone magnetic poles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209913593U true CN209913593U (en) | 2020-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921064551.9U Active CN209913593U (en) | 2019-07-09 | 2019-07-09 | Permanent magnet rotor with herringbone magnetic poles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209913593U (en) |
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2019
- 2019-07-09 CN CN201921064551.9U patent/CN209913593U/en active Active
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