CN104158328A - Motor and motor rotor thereof - Google Patents
Motor and motor rotor thereof Download PDFInfo
- Publication number
- CN104158328A CN104158328A CN201410441472.0A CN201410441472A CN104158328A CN 104158328 A CN104158328 A CN 104158328A CN 201410441472 A CN201410441472 A CN 201410441472A CN 104158328 A CN104158328 A CN 104158328A
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- magnet steel
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- rotor core
- rotor
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Abstract
The invention provides a motor and a motor rotor of the motor. The motor rotor comprises a rotor core, wherein magnetic steel grooves are formed in the rotor core, and magnetic steel is arranged in the magnetic steel grooves. The motor rotor further comprises a snap spring used for limiting the magnetic steel in the magnetic steel grooves, a clamping groove is formed in the end of the rotor core, the clamping groove comprises a clamping connection portion located in the rotor core and a penetrate-out portion extending out of the end of the rotor core from the two ends of the clamping connection portion, a buckle portion matched with the clamping groove is arranged on the snap spring, and the snap spring is fixed to the rotor core through matched connection between the buckle portion and the clamping groove. The motor rotor is simple in structure, the snap spring is reliably fixed, thus, the pressing action of the snap spring on the magnetic steel can be guaranteed, the magnetic steel is better fixed, and the problem that in the prior art, magnetic steel is poorly fixed by a motor rotor is effectively solved.
Description
Technical field
The present invention relates to machine field, more specifically, relate to a kind of motor and rotor thereof.
Background technology
Common magneto has asynchronous starting magneto and frequency conversion permanent magnet motor two classes, and magneto, because having good runnability and higher efficiency, is used in refrigerant compressor widely.At present, the rotor of asynchronous starting magneto and frequency conversion permanent magnet motor adopts baffle plate to fix magnet steel mostly.
But, adopt the mode of baffle plate to carry out spacing effect to magnet steel poor, and need to use the supporting elements such as rivet when baffle plate is installed, increase cost and operating time; And in the time that magnet steel magnetic weakens, magnet steel can cannot be changed because of the effect of blocking of baffle plate.In addition, in the time adopting hot jacket to assemble, high temperature can cause magnet steel magnetic to weaken, and magnet steel cannot be changed in addition, thereby the service behaviour of motor is impacted.
The rotor structure of the fixing Alnico magneto of a kind of jump ring is disclosed in prior art, its rotor core 2 is socketed on bent axle 1, the counterbore end of rotor core 2 adopts the method for cast aluminium that magnet steel is blocked completely, form a kind of complete totally enclosed seam mode, it is spacing that the other end adopts the mode of jump ring 4 to carry out the magnet steel 3 in magnet steel groove 6, or two ends all adopt the mode of jump ring 4 to carry out spacing to the magnet steel 3 in magnet steel groove 6; Wherein, jump ring 4 is fastened in the jump-ring slot 5 on rotor core 2.
But the above-mentioned limit method to magnet steel has following defect:
(1) radian of the jump-ring slot 5 in this scheme is greater than the radian of jump ring 4, after jump ring 4 installations, easily rotate twisting, and the place of the notch of jump-ring slot 5 is comparatively weak, easily collapse limit, and then cause jump ring 4 to come off from jump-ring slot 5, thereby it is poor to adopt the effect in this way jump ring 4 being fixed, cannot ensure be fixedly the installed with effect of jump ring 3 to magnet steel 3, make the fixed effect of magnet steel 3 poor.
(2) jump-ring slot 5 of placing jump ring 4 in this scheme need to be processed one by one after casting aluminum rotor completes, consuming time so longer, and in clamping rotor, easily causes the cylindrical distortion of rotor.
(3) adopt this scheme to carry out jump ring 4 spacing, in the time changing magnet steel 3, very inconvenient.
(4) when this scheme has adopted totally enclosed seam mode, cast aluminium is too much, causes the required starting current of motor larger, and starting resistor is higher, electric motor starting poor-performing,
(5) adopted totally enclosed seam mode can make leakage field serious, the utilance of magnetite reduces greatly, has increased magnetite cost, is unfavorable for reducing motor volume.
Summary of the invention
The present invention aims to provide a kind of motor and rotor thereof, with the rotor that solves prior art to the poor problem of the fixed effect of magnet steel.
For solving the problems of the technologies described above, according to an aspect of the present invention, a kind of rotor is provided, comprise rotor core, on rotor core, be provided with magnet steel groove, in magnet steel groove, be provided with magnet steel, rotor also comprises the spacing magnet steel jump ring in magnet steel groove, the end of rotor core is provided with draw-in groove, and draw-in groove comprises that the two ends of the He Cong Access Division, Access Division that is positioned at rotor core extend the portion that passes of the end of rotor core; On jump ring, be provided with the clamping part matching with draw-in groove, and jump ring being fixedly connected on rotor core by clamping part and draw-in groove.
Further, draw-in groove and clamping part are U-shaped structure.
Further, the lateral cross section of jump ring is U-shaped structure, and on two sides of jump ring, be provided with clamping part, and draw-in groove is arranged on the both sides of the axis of rotor core symmetrically, and clamping part on two sides of jump ring is arranged in the draw-in groove of axis both sides correspondingly.
Further, the two ends of each side of jump ring are pressed on respectively on different magnet steel.
Further, on rotor core, be provided with counter sink, and draw-in groove extends towards the axis direction away from rotor core from the sidewall of counter sink.
Further, a side that passes the axis away from rotor core of portion is provided with circular arc chamfering.
Further, on the free end of jump ring, be provided with holding ring, and holding ring arranges towards the inner side of jump ring.
Further, jump ring is arranged on one end of rotor core, and the notch place of the magnet steel groove of the other end of rotor core is provided with spacing lug, spacing lug from a sidewall of magnet steel groove extend towards another sidewall of magnet steel groove.
Further, on magnet steel groove, be provided with multiple spacing lugs, and multiple spacing lug is along the circumferential setting of magnet steel groove.
According to another aspect of the present invention, provide a kind of motor, comprised motor stator and be arranged on the rotor in motor stator, rotor is above-mentioned rotor.
Further, draw-in groove is arranged on one end of rotor core, and the aperture area of the notch of the magnet steel groove of the other end of rotor core is less than the face area of magnet steel.
On jump ring in rotor in the present invention, be provided with clamping part, the end of rotor core is provided with the draw-in groove matching with clamping part, and draw-in groove comprises that the two ends of the He Cong Access Division, Access Division that is positioned at rotor core extend the portion that passes of the end of rotor core, like this, after jump ring is arranged on rotor core, its clamping part is connected in draw-in groove, and stretch out from the portion of passing of draw-in groove at the two ends of clamping part, and then realize the effective of jump ring fixed, improve the stability fixing to jump ring, prevented that it from deviating from the process of working rotor from draw-in groove.
Visible, simple in structure, the fixing reliably jump ring of the rotor in the present invention, and then can ensure the be installed with effect of jump ring to magnet steel, and improve the fixed effect to magnet steel, effectively solve rotor of the prior art to the poor problem of the fixed effect of magnet steel.
Brief description of the drawings
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 has schematically shown the vertical view of rotor of the prior art;
Fig. 2 has schematically shown the vertical view of the rotor in the present invention;
Fig. 3 has schematically shown the A-A cutaway view in Fig. 2;
Fig. 4 has schematically shown the enlarged drawing of the clamping part of the jump ring in Fig. 3;
Fig. 5 has schematically shown the enlarged drawing of the draw-in groove in Fig. 2;
Fig. 6 has schematically shown the vertical view of jump ring normal condition;
Fig. 7 has schematically shown vertical view when jump ring is compressed to be installed;
Fig. 8 has schematically shown the end view of jump ring;
Fig. 9 has schematically shown the structural representation of the technique nose end of the rotor core in an embodiment; And
Figure 10 schematically shown in another embodiment the structural representation of technique nose end of rotor core.
Reference numeral in figure: 1, bent axle; 2, rotor core; 3, magnet steel; 4, jump ring; 5, jump-ring slot; 6, magnet steel groove; 10, rotor core; 11, draw-in groove; 12, counter sink; 13, Access Division; 14, pass portion; 15, circular arc chamfering; 16, fabrication hole; 21, magnet steel groove; 22, magnet steel; 23, spacing lug; 30, jump ring; 31, clamping part; 32, side; 33, holding ring; 40, mouse cage.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
According to an aspect of the present invention, a kind of rotor is provided, please refer to Fig. 2 to Fig. 9, this rotor comprises rotor core 10, on rotor core 10, be provided with magnet steel groove 21, be provided with magnet steel 22 in magnet steel groove 21, rotor also comprises spacing magnet steel 22 jump ring 30 in magnet steel groove 21, the end of rotor core 10 is provided with draw-in groove 11, and draw-in groove 11 comprises that the two ends of the 13He Cong Access Division, Access Division 13 that is positioned at rotor core 10 extend the portion that passes 14 of the end of rotor core 10; On jump ring 30, be provided with the clamping part 31 matching with draw-in groove 11, and jump ring 30 being fixedly connected on rotor core 10 by clamping part 31 and draw-in groove 11.
On jump ring 30 in rotor in the present invention, be provided with clamping part 31, the end of rotor core 10 is provided with the draw-in groove 11 matching with clamping part 31, and draw-in groove 11 comprises that the two ends of the 13He Cong Access Division, Access Division 13 that is positioned at rotor core 10 extend the portion that passes 14 of the end of rotor core 10, like this, after jump ring 30 is arranged on rotor core 10, its clamping part 31 is connected in draw-in groove 11, and stretch out from the portion that passes 14 of draw-in groove 11 at the two ends of clamping part 31, and then realize the effective of jump ring 30 fixed, improve the stability fixing to jump ring 30, prevent that it from deviating from the process of working rotor from draw-in groove 11.
Visible, simple in structure, the fixing reliably jump ring 30 of the rotor in the present invention, and then can ensure the be installed with effect of jump ring 30 to magnet steel 22, and improve the fixed effect to magnet steel 22, effectively solve rotor of the prior art to the poor problem of the fixed effect of magnet steel 22.
Preferably, as shown in Figure 3 and Figure 4, draw-in groove 11 and clamping part 31 are U-shaped structure.This structure can improve draw-in groove 11 and the stability that clamping part 31 is connected, and clamping part 31 is not easy from the interior disengaging of draw-in groove 11.
Preferably, as shown in Figure 6 and Figure 7, the lateral cross section of jump ring 30 is U-shaped structure, and be provided with clamping part 31 on two sides 32 of jump ring 30, and draw-in groove 11 is arranged on the both sides of the axis of rotor core 10 symmetrically, and clamping part 31 on two sides 32 of jump ring 30 is arranged in the draw-in groove 11 of axis both sides correspondingly.Like this, all block and be set in draw-in groove 11 by two sides 32 that make jump ring 30, can improve the fixed effect of jump ring 30, and then improve the fixed effect of jump ring 30 to magnet steel 22.Preferably, the Access Division 13 of draw-in groove 11 is vertical with the diametric(al) of rotor core 10 at the bearing of trend of the cross section of rotor core 10.
Preferably, the two ends of each side 32 of jump ring 30 are pressed on respectively on different magnet steel 22.In this application, on rotor core 10, be provided with four magnet steel 22, the axis setting of these magnet steel 22 surrounding rotor iron cores 10, like this, the two ends of the each side 32 by making jump ring 30 are pressed on respectively on different magnet steel 22, can ensure that this jump ring 30 all forms to all magnet steel 22 effect that is installed with.
Preferably, on rotor core 10, be provided with counter sink 12, and draw-in groove 11 extends towards the axis direction away from rotor core 10 from the sidewall of counter sink 12.By counter sink 12 is set, and draw-in groove 11 is communicated with counter sink 12, can makes jump ring 20 be installed to more easily in draw-in groove 11.
In this application, one end with counter sink 12 of rotor core 10 is countersunk head nose end, and the one end with fabrication hole 16 is technique nose end.Preferably, having symmetrical 11, two draw-in grooves 11 of draw-in groove for fixing jump ring 30 at the countersunk head nose end of rotor core 10 is arranged on two sidewalls of counter sink 12.
In the time of assembling, first magnet steel 22 is inserted in magnet steel groove 21 from the counterbore end of rotor core 10 according to correct pole orientation, then utilize Circlip tongs or directly with hand, jump ring 30 inwardly pushed, making jump ring 30 to internal strain, attaching it in the draw-in groove 11 of rotor core 10 counterbore ends.
Preferably, a side that passes the axis away from rotor core 10 of portion 14 is provided with circular arc chamfering 15 in invention.The clamping part 31 that can ensure jump ring 30 is set so all the time in draw-in groove 11, prevents that it is from the interior disengaging of draw-in groove 11.Preferably, circular arc chamfering 15 is arranged on a side of the close counter sink 12 of the portion of passing 14.Setting can effectively prevent that jump ring 30 from skidding off because slightly rotating from draw-in groove 11 in rotor operation process like this, and slips in counter sink 12.
Preferably, on the free end of jump ring 30, be provided with holding ring 33, and holding ring 33 arranges towards the inner side of jump ring 30.For ease of installing, go out holding ring 33 in the tip designs of jump ring 30, like this, just Circlip tongs is clamped in holding ring 33 places.
In this application, jump ring 30 is chosen the good elastomeric material of rigidity (as 65Mn) conventionally, and its diameter D1 span is 0.8～1.6mm, ensures that jump ring 30 possesses enough intensity and can be stuck in draw-in groove 11 and do not come off.The radial direction that jump ring 30 is installed adopts Flexible Design, and after installing, the size of the monolateral angle that departs from origin-location of jump ring 30 should be between 4 °～10 °, and Fig. 7 represents the state after jump ring is installed.Jump ring 30 is installed axial direction and is adopted equally Flexible Design, and the size of the initial angle of horizontal direction is between 4 °～10 °, and the height of clamping part 31 is 4～7 times of jump rings, 30 diameter D1, the jump ring diameter D1 that the chamfer radius of the bottom of clamping part 31 is less than 2 times; The jump ring diameter D1 that the opening length of draw-in groove 11 is greater than 2 times, the jump ring diameter D1 that the height on the top of Access Division 13 is greater than 1.5 times, the size that passes the width of portion 14 is the jump ring diameter D1 of 1.5～2.5 times, the jump ring diameter D1 that Access Division 13 is greater than 1.5 times along the extension degree of depth of rotor radial direction.
Preferably, jump ring 30 is arranged on one end of rotor core 10, and the notch place of the magnet steel groove 21 of the other end of rotor core 10 is provided with spacing lug 23, spacing lug 23 from a sidewall of magnet steel groove 21 extend towards another sidewall of magnet steel groove 21.Preferably, spacing lug 23 is arranged on the notch place of the magnet steel groove 21 with countersunk head nose end of rotor core 10, and like this, magnet steel groove 21 forms a kind of fixing structure of half opening.
Preferably, on magnet steel groove 21, be provided with multiple spacing lugs 23, and multiple spacing lug 23 is along the circumferential setting of magnet steel groove 21.Preferably, the total length of spacing lug 23 is not less than the axial length of the magnet steel 22 of 0.1 times, and the width of spacing lug 23 is the radial width of the magnet steel 22 of 0.3～0.8 times.Preferably, the countersunk head nose end of rotor core 10 is provided with mouse cage 40.
In this application, as shown in figure 10, during to rotor core 10 punching, go out 2～6 spacing lugs 23 in the magnet steel groove 21 edge punching of last 1～5 silicon steel sheet of rotor core 10 technique nose ends, form the fixing structure of another kind of half opening.When assembling, first magnet steel 22 is inserted in magnet steel groove 21 from the countersunk head nose end of rotor core 10 according to correct pole orientation, then utilize Circlip tongs or directly with hand, jump ring 30 inwardly pushed, make jump ring 30 to internal strain, attach it in the draw-in groove 11 of countersunk head nose end of rotor core 10, magnet steel 22 is owing to being subject to the acting in conjunction of spacing lug 23 and jump ring 30, and then is fixed, thereby can prevent that magnet steel 22 from moving in running.
Preferably, as shown in Figure 9, jump ring 30 is arranged on one end of rotor core 10, and the aperture area of the notch of the magnet steel groove 21 of the other end of rotor core 10 is less than the face area of magnet steel 22.Like this, just can form the fixing structure of half bayonet socket, and then make one end away from jump ring 30 of magnet steel 22 be supported on this notch place.
In this application, rotor core 10 is formed by multiple silicon steel sheet stacks, and the magnet steel groove 21 of entirety is made up of jointly the magnet steel groove 21 on each silicon steel sheet.The shape of the magnet steel groove 21 of last 1～5 silicon steel sheet of technique nose end (one end away from jump ring 30 of rotor core 10) is changed, make the length of the magnet steel groove 21 on last 1～5 silicon steel sheet be less than the length of the magnet steel groove 21 on other silicon chips, and then the fixing structure of formation half opening, like this, the end of magnet steel 22 is subject to the supporting role of last 1～5 silicon steel sheet of technique nose end, be subject to the effect of jump ring 30 at countersunk head nose end, thereby be fixed, avoided magnet steel 22 to be moved in running.As shown in Figure 9, on the end face of the technique nose end of rotor core 10, the length of the magnet steel groove 21 on last 1-5 sheet silicon steel sheet is less than the cross-section lengths of magnet steel 22, L1, L2 are respectively the two ends of magnet steel groove 21 on last 1-5 sheet silicon steel sheet and the distance between the corresponding two ends of magnet steel 22, for the ease of dismounting magnet steel 22, and ensureing the supporting role of silicon steel sheet to magnet steel 22, the size of L1, L2 is chosen for the cross-section lengths of the magnet steel 22 of 0.1～0.3 times.
Visible, in the present invention, adopt the fixing structure of half opening to carry out jump ring 30 spacing, in the time changing magnet steel 22, very convenient; And, reduce cast aluminium, reduce the required starting current of motor, starting resistor is lower, electric motor starting better performances; In addition, adopt the seam mode of half opening can make leakage field alleviate, the utilance of magnet steel improves greatly, has reduced magnet steel cost, is conducive to reduce motor volume.
According to another aspect of the present invention, provide a kind of motor, comprised motor stator and be arranged on the rotor in motor stator, rotor is above-mentioned rotor.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. a rotor, comprise rotor core (10), on described rotor core (10), be provided with magnet steel groove (21), in described magnet steel groove (21), be provided with magnet steel (22), described rotor also comprises spacing described magnet steel (22) jump ring (30) in described magnet steel groove (21), it is characterized in that:
The end of described rotor core (10) is provided with draw-in groove (11), and described draw-in groove (11) comprises the portion that passes (14) that is positioned at the Access Division (13) of described rotor core (10) and extends the end of described rotor core (10) from the two ends of described Access Division (13);
On described jump ring (30), be provided with the clamping part (31) matching with described draw-in groove (11), and described jump ring (30) being fixedly connected on described rotor core (10) by described clamping part (31) and described draw-in groove (11).
2. rotor according to claim 1, is characterized in that, described draw-in groove (11) and described clamping part (31) are U-shaped structure.
3. rotor according to claim 1, it is characterized in that, the lateral cross section of described jump ring (30) is U-shaped structure, and be provided with described clamping part (31) on two sides (32) of described jump ring (30), and described draw-in groove (11) is arranged on the both sides of the axis of described rotor core (10) symmetrically, and described clamping part (31) on two sides (32) of described jump ring (30) is arranged in the described draw-in groove (11) of described axis both sides correspondingly.
4. rotor according to claim 3, is characterized in that, the two ends of each side (32) of described jump ring (30) are pressed on respectively on different described magnet steel (22).
5. rotor according to claim 1, it is characterized in that, on described rotor core (10), be provided with counter sink (12), and described draw-in groove (11) extends towards the axis direction away from described rotor core (10) from the sidewall of described counter sink (12).
6. rotor according to claim 5, is characterized in that, described in pass the axis away from described rotor core (10) of portion (14) a side be provided with circular arc chamfering (15).
7. rotor according to claim 1, it is characterized in that, on the free end of described jump ring (30), be provided with holding ring (33), and described holding ring (33) arranges towards the inner side of described jump ring (30).
8. rotor according to claim 1, it is characterized in that, described jump ring (30) is arranged on one end of described rotor core (10), and the notch place of the described magnet steel groove (21) of the other end of described rotor core (10) is provided with spacing lug (23), described spacing lug (23) extends towards another sidewall of described magnet steel groove (21) from a sidewall of described magnet steel groove (21).
9. rotor according to claim 8, it is characterized in that, on described magnet steel groove (21), be provided with multiple described spacing lugs (23), and described multiple spacing lugs (23) are along the circumferential setting of described magnet steel groove (21).
10. rotor according to claim 1, it is characterized in that, described jump ring (30) is arranged on one end of described rotor core (10), and the aperture area of the notch of the described magnet steel groove (21) of the other end of described rotor core (10) is less than the face area of described magnet steel (22).
11. 1 kinds of motors, comprise motor stator and are arranged on the rotor in described motor stator, it is characterized in that, described rotor is the rotor described in any one in claim 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441472.0A CN104158328B (en) | 2014-09-01 | Motor and rotor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441472.0A CN104158328B (en) | 2014-09-01 | Motor and rotor thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104158328A true CN104158328A (en) | 2014-11-19 |
| CN104158328B CN104158328B (en) | 2017-01-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045958A (en) * | 2022-06-02 | 2022-09-13 | 浙江锋龙电气股份有限公司 | Magneto with high magnetic permeability |
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| CN2845280Y (en) * | 2005-11-12 | 2006-12-06 | 杨百昌 | Permanent magnetic rotor with magnet fixed by clamping spring |
| CN201278477Y (en) * | 2008-08-11 | 2009-07-22 | 隆鑫工业有限公司 | Rotor of permanent magnet generator |
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| CN201758313U (en) * | 2010-01-15 | 2011-03-09 | 浙江京马电机有限公司 | Motor rotor |
| CN102130554A (en) * | 2011-03-15 | 2011-07-20 | 哈尔滨工业大学 | Pole mechanical fixing structure of permanent magnet motor |
| CN202183658U (en) * | 2011-08-17 | 2012-04-04 | 浙江迪贝电气股份有限公司 | Magnetic tile fixing structure of permanent magnet motor rotor |
| CN103928997A (en) * | 2012-11-06 | 2014-07-16 | 米沃奇电动工具公司 | Electric Motor For Power Tool |
| CN204068480U (en) * | 2014-09-01 | 2014-12-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor and rotor thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4636107A (en) * | 1982-03-30 | 1987-01-13 | Plus Manufacturing Co., Inc. | Reformed in place resilient retention springs |
| CN2845280Y (en) * | 2005-11-12 | 2006-12-06 | 杨百昌 | Permanent magnetic rotor with magnet fixed by clamping spring |
| CN201278477Y (en) * | 2008-08-11 | 2009-07-22 | 隆鑫工业有限公司 | Rotor of permanent magnet generator |
| CN201466832U (en) * | 2009-05-12 | 2010-05-12 | 许晓华 | Magnetic steel fixing structure of brushless motor rotor |
| CN201758313U (en) * | 2010-01-15 | 2011-03-09 | 浙江京马电机有限公司 | Motor rotor |
| CN102130554A (en) * | 2011-03-15 | 2011-07-20 | 哈尔滨工业大学 | Pole mechanical fixing structure of permanent magnet motor |
| CN202183658U (en) * | 2011-08-17 | 2012-04-04 | 浙江迪贝电气股份有限公司 | Magnetic tile fixing structure of permanent magnet motor rotor |
| CN103928997A (en) * | 2012-11-06 | 2014-07-16 | 米沃奇电动工具公司 | Electric Motor For Power Tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045958A (en) * | 2022-06-02 | 2022-09-13 | 浙江锋龙电气股份有限公司 | Magneto with high magnetic permeability |
| CN115045958B (en) * | 2022-06-02 | 2024-05-03 | 浙江锋龙电气股份有限公司 | Magneto with high magnetic permeability |
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