TWI849869B - Magnetic gear magnetic ring - Google Patents

Abstract

A magnetic gear magnetic adjustment ring is suitable for installation between an outer rotor and an inner rotor of the magnetic gear, and comprises a magnetic core seat, a plurality of magnetic adjustment cores, and a cladding made of carbon fiber material. The magnetic core seat is formed in one piece, and comprises two end rings, a middle column connected to the end rings and made of carbon fiber material, and a plurality of annular ribs extending outward from the outer surface of the middle column and defining a plurality of magnetic core slots together with the end rings and the middle column. Each of the magnetic adjustment cores is arranged in a respective magnetic core slot and is limited by the cladding. The present invention uses carbon fiber material to form the center column and the cladding, and integrally forms the magnetic core seat, thereby reducing weight and improving structural strength, thereby increasing the upper limit of the rotation speed of the magnetic gear and improving operating performance.

Description

Magnetic gear magnetic ring

The present invention relates to a magnetic gear, and in particular to a magnetic gear magnetic tuning ring comprising carbon fiber material.

The existing concentric magnetic gear includes an inner rotor, a magnetic adjustment ring, and an outer rotor. The inner rotor and the outer rotor both include a plurality of permanent magnets arranged at intervals around the inner rotor. The magnetic adjustment ring includes a plurality of iron core slots arranged at intervals around the inner rotor, and a plurality of magnetic adjustment iron cores respectively arranged in the iron core slots. In order to reduce the weight of the magnetic gear, the magnetic adjustment ring is formed in one piece with epoxy resin.

When the inner rotor or the outer rotor rotates at a relative speed relative to the magnetic tuning ring, the magnetic cores are affected by the magnetic force and generate a torque away from the core slots. When the relative speed is too high, the magnetic cores are affected by the torque and drive the magnetic tuning ring to deform or separate from the magnetic tuning ring, causing damage to the magnetic gear.

If the structural strength of the magnetic tuning ring can be further improved while taking into account lightweighting, the magnetic gear will be able to withstand a higher rotation speed, thereby improving the performance of the magnetic gear.

Therefore, an object of the present invention is to provide a magnetic tuning ring having a higher structural strength and being suitable for magnetic gears with higher rotation speeds.

Therefore, the magnetic gear of the present invention includes an outer rotor and an inner rotor concentric with the outer rotor. The magnetic gear magnetic ring is suitable for installation between the outer rotor and the inner rotor, and includes a magnetic core seat, a plurality of magnetic cores, and a covering.

The magnetic core seat is formed in one piece and includes two end rings spaced apart along the extension direction of an axis, a middle column portion connected to the end rings, and a plurality of annular rib portions connected to the middle column portion and defining a plurality of magnetic core slots together with the end rings and the middle column portion. The middle column portion is made of carbon fiber material and has an inner surface surrounding the axis and defining a through hole, and an outer surface opposite to the inner surface. The through hole is suitable for the inner rotor to pass through. The annular rib portions extend outward from the outer surface of the middle column portion and are spaced apart around the axis. The opening of each magnetic core slot faces outward and is located between two adjacent annular rib portions.

The magnetic cores are made of soft magnetic material. Each magnetic core is arranged in a respective magnetic core slot.

The covering piece is made of carbon fiber material, surrounds the outer surface of the magnetic core seat, and limits the isotropic magnetic core to the magnetic core slots.

The effect of the present invention is that the weight of the magnetic core seat is reduced by the middle column portion made of carbon fiber material, and the end ring portions and the ring rib portions are formed as a whole to improve the structural strength. The carbon fiber material covering is then matched to resist the torque that drives the magnetic core to separate when the inner and outer rotors rotate at high speed, so that the magnetic gear can withstand a higher rotation speed and has the advantages of better performance and better structural reliability.

Referring to FIG. 1 and FIG. 2 , an embodiment of the magnetic gear magnetic adjustment ring of the present invention is suitable for being installed between an outer rotor (not shown) and an inner rotor (not shown), and is concentric with the outer rotor and the inner rotor to form the magnetic gear. Since the inner rotor and the outer rotor are not the technical features of the present invention, and those with ordinary knowledge in the field can infer the expanded details based on the above description, no further description is given.

The magnetic tuning ring includes a magnetic core base 1 , a plurality of magnetic tuning cores 2 , and a covering member 3 .

The magnetic core base 1 is formed in one piece and includes two end rings 11 spaced apart along the extending direction of an axis L, a middle column 12 connected to the end rings 11, a plurality of annular ribs 13 connecting the middle column 12 and the end rings 11, and a plurality of partitions 14 connecting the middle column 12 and the annular ribs 13. The end rings 11, the middle column 12, the annular ribs 13 and the partitions 14 together define a plurality of magnetic core slots 10.

It should be noted that when the core base 1 is assembled in a non-integral manner, the concentricity is affected by the assembly tolerance between different components. Therefore, the integrally formed core base 1 has higher structural strength and concentricity than the conventional non-integral formed core base.

Referring to FIG. 2 and FIG. 3 , in the present embodiment, each of the end ring portions 11 is formed by stacking two stacking layers 110a and one stacking layer 110b along the extension direction of the axis L. Each of the end ring portions 11 has a plurality of screw holes 112 which are arranged at intervals around the axis L and extend from a side surface 111 along the extension direction of the axis L. The present embodiment can be arranged inside the magnetic gear through a plurality of bolts (not shown) screwed into the screw holes 112. In addition, the screw holes 112 can also be used to screw in a plurality of counterweights (not shown) of different weights to balance the present embodiment without being eccentric to the axis L, thereby improving the precision of the magnetic gear.

The stacking layers 110a are made of metal material. The stacking layers 110b are made of carbon fiber material and are located between the stacking layers 110a. Since metal material has ductility, when the stacking layers 110a made of metal material and the stacking layers 110b made of carbon fiber material are stacked to form the end ring portion 11, the toughness of the end ring portion 11 can be increased, and the end ring portion 11 can be prevented from being broken when the screw holes 112 are processed, which has the advantage of reducing the difficulty of processing. In addition, the stacked layer 110b made of carbon fiber material can reduce the eddy current generated by the end ring portion 11, thereby avoiding heat generation and improving the performance of the magnetic gear.

It should be noted that the number of the stacking layers 110a is not limited to two, and in other variations, it may be one, three, or more than three. The number of the stacking layers 110b is not limited to one, and in other variations, it may be two, or more than two. As long as one of the stacking layers 110a is made of metal material, the remaining stacking layers 110b are made of carbon fiber material.

3 to 5 , the center column 12 is made of carbon fiber material and has an inner surface 121 surrounding the axis L and defining a through hole 120, and an outer surface 122 opposite to the inner surface 121. The through hole 120 is suitable for the inner rotor to pass through.

The annular ribs 13 extend outward from the outer surface 122 of the center column 12 and are arranged at intervals around the axis L. Each of the annular ribs 13 has a structural layer 131 extending outward from the center column 12, and a reinforcing layer 132 covering the structural layer 131. In this embodiment, the structural layer 131 is made of epoxy resin material, which has the advantages of being easier to manufacture and lower cost, and lighter weight. The reinforcing layer 132 is made of carbon fiber material, so it can enhance the structural strength of the covering structural layer 131.

It should be noted that the structural layer 131 is not limited to being made of epoxy resin. In other variations, the structural layer 131 can also be made of glass fiber, plastic or carbon fiber materials, and after being covered with the reinforcement layer 132, it can also have both high structural strength and light weight.

The partitions 14 extend outward from the outer surface 122 of the central column 12. The opening of each core slot 10 faces outward and is located between two adjacent ring ribs 13. The core slots 10 are arranged into several rows of core slot areas 10a along the extension direction of the axis L. Each core slot area 10a is located between the end rings 11 and is divided by the corresponding partitions 14 to form two core slots 10. In other variations, each core slot area 10a can also be divided into three or more core slots 10 by two or more partitions 14.

In this embodiment, the partitions 14 are made of carbon fiber material and are formed integrally with the center column 12, but in other variations, each of the partitions 14 may also have a structural layer made of epoxy resin, glass fiber, plastic or carbon fiber material, and a reinforcing layer made of carbon fiber material and covering the structural layer, like each of the annular ribs 13. In other variations, the partitions 14 may not be provided, and each of the core slot areas 10a may only have one core slot 10, but the present embodiment can further improve the structural strength of the core base 1 by providing the partitions 14.

In other variations, each row of core slots 10 can be separated in other ways, such as by using a mesh structure or a honeycomb structure to separate the core slots 10. Or, in a variation in which only one core slot 10 is provided in each core slot area 10a, a plurality of shorter tuning cores 2 are provided in each core slot 10 along the extending direction of the axis L, and each tuning core 2 is coated with carbon fiber as a means of separating the tuning cores 2, and a plurality of tuning cores 2 can also be provided in each core slot area 10a.

In addition, in other variations, the core slots 10 can also be arranged into several circles of core slot sections 10b around the axis L. Each core slot section 10b is composed of several core slots 10. One of the core slot sections 10b is adjacent to one of the end rings 11, and another core slot section 10b is adjacent to another end ring 11. Each core slot section 10b is offset from another adjacent core slot section 10b along the direction around the axis L. For example, in the variation of arranging the core slot sections 10b into two circles as shown in FIG6, each core slot section 10b is slightly offset from another core slot section 10b, and every two adjacent core slots 10 in the extending direction of the axis L are separated by a partition 14. By staggering the core slots 10, the cogging torque of the magnetic gear can be reduced, thereby reducing the noise and vibration generated by the magnetic gear during operation, thereby improving the performance of the magnetic gear.

2 to 4 , the tunable magnetic cores 2 are made of soft magnetic materials. Each tunable magnetic core 2 is disposed in a respective magnetic core slot 10 .

It should be noted that the soft magnetic material is a metal or other magnetic material with low coercivity, such as silicon steel, pure iron, iron-cobalt alloy, or iron-nickel alloy, or a soft magnet made of ferrite, such as manganese-zinc ferrite or nickel-zinc ferrite.

In this embodiment, each of the magnetic cores 2 is formed by stacking a plurality of magnetic plates 21 along the extension direction of the axis L. The magnetic plates 21 are silicon steel plates in this embodiment. By stacking a plurality of silicon steel plates along the extension direction of the axis L, the magnetic core 2 can reduce the generation of eddy current compared to an integrally formed iron core, thereby reducing energy consumption and heat generation, and thus has the advantage of further improving the performance of the magnetic gear. The magnetic plates 21 can be stacked by self-adhesion, welding, riveting, riveting points, or other stacking methods.

Through the above description, the advantages of the above embodiments can be summarized as follows:

1. The weight of the magnetic core seat 1 is reduced by the middle column portion 12 made of carbon fiber material, and the end ring portions 11 and the annular rib portions 13 are integrally formed to improve the structural strength. The carbon fiber covering member 3 is used to resist the torque of the magnetic core 2 being driven away when the inner and outer rotors rotate at high speed, so that the magnetic gear can withstand a higher speed and has the advantage of higher performance. In addition, the integrally formed magnetic core seat 1 has higher structural strength and concentricity than the conventional non-integrally formed magnetic core seat.

2. The stacking layer 110a made of metal material and the stacking layer 110b made of carbon fiber material can reduce weight and improve structural strength, avoid the end ring part 11 from breaking when processing the screw holes 112, and have the advantage of reducing the difficulty of processing. The screw holes 112 can also be used for balance correction, which has the advantage of improving the precision of the magnetic gear. The stacking layer 110b made of carbon fiber material can also reduce the eddy current generated by the end ring part 11, thereby avoiding heat and improving the performance of the magnetic gear.

3. By combining the structural layer 131 made of epoxy resin material and the reinforcing layer 132 made of carbon fiber material in each annular rib 13, the annular ribs 13 have the advantages of being easier to manufacture and lower in cost, and lighter in weight, while also having the advantage of high structural strength.

4. By arranging the core slots 10 in several rows along the extension direction of the axis L, and each row of core slots 10 is separated by a corresponding partition 14, the structural strength of the core base 1 can be further improved by the partitions 14. When the core slots 10 are arranged in several circles around the extension direction of the axis L and are staggered with each other, the cogging torque of the magnetic gear can be reduced, thereby achieving the advantages of reducing noise and vibration and improving performance.

5. Since each magnetic tuning core 2 is formed by stacking a plurality of magnetic tuning sheets 21, the generation of eddy current can be reduced compared to an integrally formed iron core, thereby reducing energy consumption and heat generation, and thus having the advantage of further improving the performance of the magnetic gear.

However, the above is only an example of the implementation of the present invention, and it cannot be used to limit the scope of the implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope of the patent of the present invention.

1: Core seat 10: Core slot 10a, 10b: Core slot area 11: End ring 110a, 110b: Stacking layer 111: Side surface 112: Screw hole 12: Center column 120: Perforation 121: Inner surface 122: Outer surface 13: Ring rib 131: Structural layer 132: Reinforcement layer 14: Partition 2: Adjustment core 21: Adjustment sheet 3: Covering L: Axis

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a three-dimensional diagram illustrating an embodiment of the magnetic gear magnetic tuning ring of the present invention; FIG. 2 is an incomplete three-dimensional exploded diagram of the embodiment, omitting a covering member; FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1; FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3; FIG. 5 is a partial enlarged schematic diagram of FIG. 4; and FIG. 6 is a three-dimensional schematic diagram illustrating the variation of a magnetic core seat.

1: Magnetic core seat

10: Magnetic core slot

10a: Magnetic core slot area

11: End ring

111: Side

112: screw hole

12: Middle column

120: Perforation

121: Inner surface

122: External surface

13: Rib ring

14: Partition

2: Adjust the magnetic core

21: Magnetic adjustment plate

L: axis

Claims (10)

A magnetic gear magnetic adjustment ring, the magnetic gear includes an outer rotor and an inner rotor concentric with the outer rotor, the magnetic adjustment ring is suitable for installation between the outer rotor and the inner rotor, and includes: A magnetic core seat, formed in one piece, and comprising two end rings spaced apart along the extension direction of an axis, a middle column connected to the end rings, and several annular ribs connected to the middle column and defining several magnetic core slots together with the end rings and the middle column. The middle column is made of carbon fiber material and has an inner surface surrounding the axis and defining a through hole, and an outer surface opposite to the inner surface. The through hole is suitable for the inner rotor to pass through. The annular ribs extend outward from the outer surface of the middle column and are spaced around the axis. The opening of each magnetic core slot faces outward and is located between two adjacent annular ribs. A number of magnetic cores, made of ferromagnetic material, each of which is arranged in a respective magnetic core slot; and A covering member, made of carbon fiber material, surrounds the outer surface of the core base and limits the isotropic magnetic core to the core slots. A magnetic gear magnetic tuning ring as described in claim 1, wherein each of the annular ribs has a structural layer extending outward from the central column portion, and a reinforcement layer covering the structural layer, and the reinforcement layer is made of carbon fiber material. A magnetic gear magnetic tuning ring as described in claim 2, wherein the structural layer is made of epoxy resin, glass fiber, plastic or carbon fiber material. A magnetic gear magnetic tuning ring as described in claim 1, wherein each end ring portion has a plurality of stacked layers, at least one of the stacked layers is made of metal material, and the remaining stacked layers are made of carbon fiber material. A magnetic gear magnetic tuning ring as described in claim 4, wherein each end ring portion has a plurality of screw holes spaced around the axis and extending from one side along the extension direction of the axis. A magnetic gear magnetic tuning ring as described in claim 1, wherein each magnetic tuning core is formed by stacking a plurality of magnetic tuning plates. A magnetic gear magnetic tuning ring as described in claim 1, wherein the core slots are arranged into several rows of core slot areas along the extension direction of the axis, each of the core slot areas is located between the end ring portions and is composed of several core slots. A magnetic gear magnetic tuning ring as described in claim 1, wherein the core slots are arranged around the axis into a plurality of core slot zones, each of the core slot zones is composed of a plurality of core slots, one of the core slot zones is adjacent to one of the end ring portions, and another of the core slot zones is adjacent to another of the end ring portions, and each of the core slot zones is offset from another adjacent core slot zone along the direction around the axis. A magnetic gear magnetic tuning ring as described in claim 7 or 8, wherein the core seat further includes a plurality of partitions extending outward from the outer surface of the middle column portion and connected to the annular rib portions, and the partitions, the end ring portions, the middle column portion and the annular rib portions jointly define the core slots. A magnetic gear magnetic tuning ring as described in claim 1, wherein the outer surface is an arc surface, and each of the magnetic core slots extends outward from the outer surface.

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