TWI786814B - A wireless power transmission device for rotating led display - Google Patents

Abstract

The present invention is a wireless power transmission device for rotating LED display. It receives an alternating current power. The wireless power transmission device includes an outer stator and an inner rotor. The outer stator includes a housing space formed by a housing that can accommodate the outer the stator coil is electrically connected to the alternating current power. In addition, the inner rotor includes a cylindrical accommodating space for arranging the inner rotor coil, and conducts heat generated by the outer stator and the inner rotor through at least one heat dissipation fin element, the two ends of the inner rotor are fixed by the bearing element so that it can be fixed and rotated. Finally, the cooling fan generates convection through the blower to effectively dissipate heat, so as to achieve the effect of wirelessly transmitting power to the rotating LED display, and also through convection heat dissipation. Solve the overheating problem caused by wireless power transmission devices.

Description

A wireless power transmission device and assembly method for a rotating LED display

The present invention relates to a wireless power transmission device for a rotating LED display, especially a wireless power transmission device with an outer stator, an inner rotor, heat dissipation fin elements, bearing elements and a heat dissipation fan.

With the rapid development of science and technology, LED is used as a light source to display almost everywhere in daily life. From the development of LED signboards to the most common liquid crystal displays, LED displays are used. At present, a special LED rotating display has also been developed. The remaining characteristics, only a few LED lights can present the graphics and text to be expressed, and can be viewed from 180° in all directions, no matter what angle people stand on the front. At present, the available LED rotating displays on the market are powered by slip rings, so that the display body can be rotated, and the LEDs can emit light according to the settings to display patterns or texts. This novel visual effect can achieve publicity and The function of marketing.

However, conventional LED rotating displays can only be powered through slip rings, which also limits the application of conventional LED rotating displays in disguise, such as static and fixed applications such as store billboards and signboards, which lack changes and limit the application of LED displays. field of development is possible pity. Therefore, how to provide a rotating display that can transmit power infinitely to the LED and has a good heat dissipation effect, in addition to being easy to assemble and quicker to use, is an issue and focus that those with ordinary knowledge in the field should think about.

One purpose of the present invention is to provide heat dissipation fins and heat dissipation fans to effectively dissipate the heat generated by the outer stator (with ventilation holes) and the inner rotor through convection.

Another object of the present invention is to provide an assembly method of a slip ring device. The outer stator coil and the inner rotor coil are placed through the individual accommodation grooves formed by the outer stator housing and the inner rotor cylinder, which can effectively maintain the fixation and prevent falling off.

The wireless power transmission device for rotating the LED display of the present invention uses an external motor to connect the inner rotor to generate rotation. The wireless power transmission device includes an outer stator, an inner rotor, at least one cooling fin element and a cooling fan. The outer stator includes an outer stator casing and an outer stator coil. The outer stator casing has an accommodating space, and an inner side of the outer stator casing forms an outer stator coil accommodating groove surrounding the outer stator casing. The outer stator coil is arranged in the outer stator coil accommodating groove, and is electrically connected to the AC power supply. The inner rotor includes an inner rotor cylinder and an inner rotor coil. An inner rotor coil accommodating slot is formed on the outer side of the inner rotor cylinder, and the inner rotor cylinder is arranged in the accommodating space of the outer stator casing. The inner rotor coil is arranged in the inner rotor coil accommodation slot. The cooling fin elements are arranged in the accommodating space of the outer stator shell, and respectively contact one end of the inner rotor cylinder, and provide heat generated by the inner rotor. The heat dissipation fan is arranged at one end of the outer stator casing and covers the heat dissipation fin element for convection heat dissipation of the heat conducted by the fins and the heat generated by the outer stator and the inner rotor.

The above-mentioned wireless power transmission device, including two bearing components, are respectively corresponding to Both ends of the inner rotor cylinder are arranged in the accommodating space of the outer stator housing, and the inner rotor cylinder is kept fixed and rotates in the accommodating space of the outer stator housing.

The wireless power transmission device mentioned above, wherein the outer stator housing is a metal housing, wherein the outer stator housing includes an upper housing part and a lower housing part, and the upper housing part and the lower housing part are opposite to the outer stator coil And combined with each other, the outer stator coil is maintained and fixed in the outer stator coil accommodating groove jointly formed by the upper casing part and the lower casing part.

The wireless power transmission device mentioned above, wherein the inner rotor cylinder is a metal cylinder, wherein the inner rotor cylinder includes an upper cylinder part and a lower cylinder part, and the upper cylinder part and the lower cylinder part are opposite to each other. The rotor coils are combined with each other, so that the inner rotor coil is maintained and fixed in the inner rotor coil accommodating slot formed by the upper cylindrical part and the lower cylindrical part.

The wireless power transmission device mentioned above, wherein the heat dissipation fin elements respectively include two heat dissipation fin bodies and a plurality of heat dissipation fins, the heat dissipation fin body system conducts heat and contacts one end of the inner rotor cylinder, and the heat dissipation fins are connected to the heat dissipation The body of the fins diverges equidistantly from the plane.

A method for assembling a wireless power transmission device for rotating an LED display. The wireless power transmission device is rotated by an external motor connected to an inner rotor, including an outer stator, an inner rotor, at least one cooling fin element and a cooling fan, The outer stator includes an outer stator casing and an outer stator coil, the outer stator casing has a housing space, and the inner side of the outer stator casing forms an outer stator coil accommodating around the outer stator casing slot, the outer stator coil is electrically connected to the AC power supply, the inner rotor includes an inner rotor cylinder and an inner rotor coil, the outer side of the inner rotor cylinder forms an inner rotor coil surrounding the inner rotor cylinder The accommodating slot, wherein the assembling method includes the following steps: a) the outer stator coil is arranged in the outer stator coil accommodating slot, and the inner rotor coil is arranged in the outer stator coil accommodating slot; b) the inner rotor cylinder is arranged in the accommodation space of the outer stator housing; c) the cooling fin element is arranged in the accommodation space of the outer stator housing, and respectively contacts two sides of the inner rotor cylinder end, and conduct the heat generated by the inner rotor; and d) the cooling fan is arranged at one end of the inner rotor cylinder, and covers the cooling fin element, for convective cooling of the heat conducted by the fin and the outer stator and The inner rotor generates heat.

In the assembly method mentioned above, the wireless power transmission device further includes two bearing elements, wherein step b) further includes a step b1) the bearing elements respectively correspond to the two ends of the inner rotor cylinder and are arranged on the outer stator casing The accommodation space of the outer stator housing, and the inner rotor cylinder remains fixed and rotates in the accommodation space of the outer stator housing.

The above-mentioned assembly method, wherein the outer stator housing is a metal housing, wherein the outer stator housing includes an upper housing part and a lower housing part, the assembly method further includes a step e) before the step a) The casing part and the lower casing part are opposite to the outer stator coil and combined with each other, so that the outer stator coil is maintained and fixed in the outer stator coil accommodating groove jointly formed by the upper casing part and the lower casing part.

The above-mentioned assembly method, wherein the inner rotor cylinder is a metal cylinder, wherein the inner rotor cylinder includes an upper cylinder part and a lower cylinder part, and the assembly method further includes a step e' before step a) ), the upper cylinder part and the lower cylinder part are opposite to the inner rotor coil and combined with each other, so that the inner rotor coil is maintained and fixed in the inner rotor coil accommodating groove jointly formed by the upper cylinder part and the lower cylinder part.

In the above-mentioned assembly method, wherein the heat dissipation fin elements respectively include two heat dissipation fin bodies and a plurality of heat dissipation fins, and the heat dissipation fins are connected to the heat dissipation fin bodies and spread out equidistantly from the plane, step d further includes A step d1) heat conduction of the heat dissipation fin body contacts one end of the inner rotor cylinder.

10: Wireless power transmission device

100: Outer stator

101: Upper shell parts

102: Lower shell parts

103: Outer stator coil accommodation slot

110: Outer stator housing

111:Accommodating space

120: Outer stator coil

200: inner rotor

201: upper column parts

202: lower column parts

203: Inner rotor coil accommodation slot

210: inner rotor cylinder

220: inner rotor coil

300: cooling fin element

310: cooling fin body

311: heat sink

400: Bearing components

500: cooling fan

a, b, b1, c, d, d1, e, e': assembly method steps

Figure 1 is a schematic diagram of a wireless power transmission device for a rotating LED display of the present invention; Figure 2 is a cross-sectional view of a wireless power transmission device for a rotating LED display; Figure 3 is a schematic diagram of the present invention An exploded view of the wireless power transmission device for rotating LED displays; Figure 4A and Figure 4B are schematic diagrams of the cooling fan of the present invention; Figure 5 is a schematic diagram of a wireless power transmission device for rotating LED displays Flow chart of the steps of the assembly method;

The present invention is a wireless power transmission device for rotating LED displays. It accepts an AC power supply and conducts power through non-contact electromagnetic induction. The wireless power transmission device includes an outer stator, and the outer stator includes a housing formed by a casing. The space can accommodate the outer stator coil so that it can be electrically connected to the AC power supply, and has ventilation holes on the outside. In addition, the wireless power transmission device also includes an inner rotor. The inner rotor includes an accommodation space formed by a cylinder, which can The inner rotor coil is provided, and the heat generated by the inner rotor is conducted through at least one heat dissipation fin element, and the heat dissipation is effectively dissipated by the cooling fan through blowing air to generate convection, so as to achieve the effect of wirelessly transmitting power to the rotating LED display. The problem of overheating of the wireless power transmission device can be solved through an effective heat dissipation method.

Please refer to FIG. 1 , which is a schematic diagram of a wireless power transmission device for a rotating LED display according to the present invention. The present invention is a wireless power transmission device 10 for rotating an LED display, which receives an AC power source to generate rotation. The wireless power transmission device 10 includes an outer stator 100, an inner rotor 200, at least one cooling fin element 300, and two bearing elements 400 and a cooling fan 500, assembled by These structures can constitute the wireless power transmission device 10 , and each structure of the wireless power transmission device 10 will be fully explained and illustrated below.

Please continue to refer to FIG. 2 , which is a cross-sectional view of a wireless power transmission device for a rotating LED display. The outer stator 100 includes an outer stator shell 110 and an outer stator coil 120 . The outer stator housing 110 has an accommodating space 111. The inner side of the outer stator housing 110 forms an outer stator coil accommodating groove 103 surrounding the outer stator housing 110. The outer stator housing 110 is a combination of silicon steel sheets. The metal casing is formed, and has a ventilation hole (as shown in Figures 2 and 3) penetrating in the direction of extension on the outer side, wherein the outer stator casing 110 includes an upper casing part 101 and a lower casing part 102, the upper casing part 101 and the lower casing part 102 The casing part 101 and the lower casing part 102 are opposed to the outer stator coil 120 and combined with each other, so that the outer stator coil 120 is maintained and fixed in the outer stator coil accommodating groove jointly formed by the upper casing part 101 and the lower casing part 102 103. To put it simply, the outer stator 100 has an outer stator housing 110 and has an accommodation space. The inner side of the outer stator housing 110 has an outer stator coil accommodation slot 103 for accommodating the outer stator coil 120 . The outer stator coil 120, in addition, the outer stator casing 110 is a metal casing composed of silicon steel sheets, and includes an upper casing part 101 and a lower casing part 102, wherein the upper casing part 101 and the lower casing The component 102 is combined with the outer stator coil 120 to keep the outer stator coil 120 fixed in the outer stator coil accommodating groove 103 .

The outer stator coil 120 is disposed in the outer stator coil accommodating slot 103 and is electrically connected to an AC power source. In detail, the outer stator coil 120 is suitable to be arranged in the outer stator coil accommodating groove 103 composed of the upper housing part 101 and the lower housing part 102, since the upper housing part 101 and the lower housing part 102 are relatively outer The stator coils 120 are combined with each other so that the outer stator coils 120 are kept fixed in the outer stator coil accommodating groove 103 and are not easy to fall off, so that the outer stator coils 120 can be electrically connected to an AC power source to be energized.

The inner rotor 200 includes an inner rotor cylinder 210 and an inner rotor coil 220 . The outer side of the inner rotor cylinder 210 is formed with an inner rotor coil accommodating groove 203 surrounding the inner rotor cylinder 210, and the inner rotor The cylinder 210 is set in the accommodation space 111 of the outer stator housing 110, and the inner rotor cylinder 210 is a metal cylinder composed of a silicon steel sheet, wherein the inner rotor cylinder 210 includes an upper cylinder part 201 and a lower cylinder Part 202, the upper cylindrical part and 201 lower cylindrical part 202 are opposed to the inner rotor coil 220 and combined with each other, so that the inner rotor coil 220 is maintained and fixed on the inner rotor coil formed by the upper cylindrical part 201 and the lower cylindrical part 202 accommodating groove 203 . In detail, the inner rotor 200 includes an inner rotor cylinder 210, which is composed of an upper cylinder part 201 and a lower cylinder part 202, and the inner rotor cylinder 210 is arranged in the accommodation space 111 of the outer stator housing 110 , wherein the upper cylinder part 201 and the lower cylinder part 202 are formed opposite to the inner rotor coil 220 and combined with each other, so that the inner rotor coil 220 can be kept fixed in the inner rotor coil accommodating groove 203 and is not easy to fall off.

Please continue to refer to FIG. 3 , which is an exploded view of the wireless power transmission device for rotating LED displays of the present invention. At least one cooling fin element 300 is disposed in the accommodating space 111 of the outer stator housing 110 , and contacts one end of the inner rotor cylinder 210 respectively, and conducts heat generated by the inner rotor 200 . To further illustrate, the wireless power transmission device 10 has at least one heat dissipation fin element 300, which is arranged in the accommodation space 111 of the outer stator housing 110, and respectively contacts one end of the inner rotor cylinder 210, and the heat dissipation fin element 300 is used for conduction The heat energy generated by the inner rotor 200, the heat dissipation fin element 300 respectively includes a heat dissipation fin body 310 and a plurality of heat dissipation fins 311, the heat dissipation fin body 310 is in contact with one end of the inner rotor cylinder 210, and the heat dissipation The fins 311 are connected to the heat dissipation fin body 310 and spread out equidistantly from the plane.

Therefore, when the outer stator coil 120 receives AC power, it conducts to the inner rotor coil 220 through non-contact electromagnetic induction to provide power for the LED display. The external motor provides the rotational power of the internal stator and LED display, and makes the blade fan rotate to generate airflow and heat dissipation.

The wireless power transmission device 10 further includes two bearing elements 400, which respectively correspond to the two ends of the inner rotor cylinder 210 and are arranged in the accommodating space 111 of the outer stator housing 110, so that the inner rotor cylinder 210 can be kept fixed and fixed in the outer stator housing. Rotate in the accommodation space 111 of the body 110 . In simple terms, the 400 series of bearing components are respectively Corresponding to both ends of the inner rotor cylinder 210 and arranged in the accommodation space 111 of the outer stator housing 110, the inner rotor cylinder 210 can be kept fixed, and these bearing elements 400 can be accommodated in the outer stator housing 110 The rotation in the space 111 is convenient to drive the cooling fin element 300 and the cooling fan 500 to rotate to dissipate heat.

Please refer to FIG. 4A and FIG. 4B . FIG. 4A and FIG. 4B are schematic diagrams of the cooling fan of the present invention. The heat dissipation fan 500 is disposed at one end of the outer stator housing 110 and covers the heat dissipation fin element 300 for the convection heat dissipation fin element 300 to conduct the heat generated by the inner rotor 200 . To put it simply, the heat dissipation fan 500 is the main heat dissipation element of the wireless power transmission device 10. The heat dissipation fan 500 is arranged on the inner rotor 200, one end of the heat dissipation fin element 300, and covers the outer stator housing 110 to dissipate heat. The fan 500 is used to provide wind power to generate convection, so as to dissipate the heat energy generated by the outer stator 100 and the inner rotor 200 , and dissipate the heat conducted by the cooling fin element 300 .

Please continue to refer to FIG. 5 . FIG. 5 is a flow chart showing the steps of an assembly method for a wireless power transmission device for a rotating LED display. The present invention also provides an assembly method for a wireless power transmission device 10 for rotating an LED display. The wireless power transmission device 10 receives an AC power source to generate rotation, and includes an outer stator 100, an inner rotor 200, and at least one cooling fin element 310 and a cooling fan 400, the outer stator 100 includes an outer stator housing 110 and an outer stator coil 120, the outer stator housing 110 has an accommodating space 111, and the inner side of the sub housing 110 forms a circle around the outer stator housing The outer stator coil accommodation groove 103 of the body 100, the outer stator coil 120 is connected to the AC power supply, the inner rotor 200, an inner rotor cylinder 210 and an inner rotor coil 220, and the outer side of the inner rotor cylinder 210 is formed with a ring surrounding the inner rotor The inner rotor coil accommodating groove 211 of the cylinder 210 will be explained and illustrated in detail below regarding the assembly method and steps of the wireless power transmission device 10 .

In step a, the outer stator coil 120 is placed in the outer stator coil accommodation slot 103 , and the inner rotor coil 220 is placed in the inner rotor coil accommodation slot 203 . To put it simply, in step a, the outer stator coil 120 and the inner rotor coil 220 are respectively disposed in their respective coil accommodating slots, so as to maintain the fixation. Step b, inner rotor column The body 210 is disposed in the accommodation space 111 of the outer stator case 110 . In detail, in this step, the inner rotor cylinder 210 is disposed in the accommodating space 111 of the outer stator housing 110 to form a fixation. Wherein step b further includes a step b1, step b1 means that these bearing elements 400 respectively correspond to the two ends of the inner rotor cylinder 210 and are arranged in the accommodating space 111 of the outer stator housing 110, and are maintained by the inner rotor cylinder 210 It is fixed and rotates in the accommodation space 111 of the outer stator housing 110 . To further explain, in step b1, the bearing elements 400 are respectively arranged on both ends of the corresponding inner rotor cylinder 210, and are arranged in the accommodation space 111 of the outer stator housing 110, which not only can maintain and fix the inner rotor cylinder 210 , it is also possible to make the bearing element 400 rotate in the accommodating space 111 of the outer stator housing 110 .

Then continue to step c, step c is to arrange the heat dissipation fin element 300 in the accommodation space 111 of the outer stator housing 110, and contact one end of the inner rotor cylinder 210 respectively, and conduct the heat generated by the outer stator 100 and the inner rotor 200 . Further explaining step c, the heat dissipation fin element 300 is arranged in the accommodation space 111 of the outer stator housing 110, and one end of the inner rotor cylinder 210 is respectively contacted so that the heat dissipation fin element 300 conducts heat dissipation from the outer stator 100 and the inner rotor 200. The generated heat is used to achieve the effect of heat dissipation.

Then continue to step d, step d is to arrange the heat dissipation fan 500 on the inner rotor 200, one end of the heat dissipation fin element 300, and cover the outer stator housing 110 for convection and heat dissipation of the heat conducted by the fins and the inner The heat generated by the rotor 200. In simple terms, in step d, the heat dissipation fan 500 is disposed on the inner rotor 200, one end of the heat dissipation fin element 300, and covers the outer stator housing 110, and the heat dissipation fan 500 can convect and dissipate the heat conducted by the fins. The heat generated by the inner rotor 200 achieves the effect of effectively dissipating heat through wind convection. The step d further includes a step d1, and the step d1 is to arrange one end of the cooling fin body 310 corresponding to the inner rotor cylinder 210 . In detail, the step d1 is to heat-conduct the fin body 310 into contact with one end of the inner rotor cylinder 210 so as to dissipate the heat generated by the outer stator 100 and the inner rotor 200 through convection heat dissipation.

The assembly method of the wireless power transmission device 10 has a step e before performing step a, and step e) is to assemble the upper casing part 101 and the lower casing part 102 relative to the outer stator coil 120, so that the outer stator coil 120 is The outer stator coil accommodating groove 103 formed jointly by the upper housing part 101 and the lower housing part 102 is maintained and fixed. To further illustrate, to place the outer stator coil 120 before the outer stator coil accommodating slot 103, it is necessary to complete the combination of the upper casing part 101 and the lower casing part 102 of the outer stator casing 110 with respect to the outer stator coil 120, so that The outer stator coil 120 can be placed and fixed only after the outer stator coil accommodating groove 103 is formed. In addition, before performing step a, a step e' needs to be performed first. Step e' is to align the upper cylinder part 201 and the lower cylinder part 202 with the inner rotor coil 220 and combine them with each other, so that the inner rotor coil 220 is kept fixed on the upper The cylindrical part 201 and the lower cylindrical part 202 jointly form an inner rotor coil accommodating groove 203 . In simple terms, step e' is to combine the upper cylinder part 201 and the lower cylinder part 202 of the inner rotor cylinder 210 with respect to the inner rotor coil 220 to form an inner rotor coil accommodating slot 203 for accommodating the inner rotor coil 220 After the combination is completed, the inner rotor coil 220 can be placed in the inner rotor coil accommodating groove 203 to keep it fixed. By executing the above-mentioned assembling method of the wireless power transmission device 10 , the wireless power transmission device 10 can be completed.

The wireless power transmission device 10 of the present invention provides power to the rotating LED display through a wireless transmission method, thereby replacing the problems of many limitations of the previous wired power supply method. A heat dissipation fin element 310 conducts the heat generated by the outer stator 100 and the inner rotor 200, and the cooling fan 500 effectively dissipates heat through convection through blowing, so as to supply power to the rotating LED display through wireless transmission. In addition, it can also effectively Heat dissipation solves the problem of overheating of wireless power transmission devices.

In addition, the present invention also provides an assembly method of the wireless power transmission device 10, by making the cylindrical part 201 and the lower cylindrical part 202 opposite to the inner rotor coil 220 and combining with each other, the inner rotor coil 220 is kept fixed on the upper The inner rotor line jointly formed by the cylindrical part 201 and the lower cylindrical part 202 Then the upper housing part 101 and the lower housing part 102 are combined with each other relative to the outer stator coil 120, so that the outer stator coil 120 is maintained and fixed on the upper housing part 101 and the lower housing part 102 The co-formed outer stator coil accommodating groove 103 enables the outer stator coil 120 and the inner rotor coil 220 to be firmly installed in the inner rotor coil accommodating groove 203 and the outer stator coil accommodating groove 103, and then the inner rotor column Body 210 is set in the accommodating space 111 of the outer stator housing 110 to form a fixed position, and then bearing elements 400 are respectively arranged at both ends of the corresponding inner rotor cylinder 210, and are set in the accommodating space 111 of the outer stator housing 110 , this action can not only maintain and fix the inner rotor cylinder 210, but also enable the bearing element 400 to rotate in the accommodation space 111 of the outer stator housing 110, and then install the cooling fin element 300 on the outer stator housing 110 The accommodating space 111 is in contact with one end of the inner rotor cylinder 210 respectively. In addition, the heat dissipation fan 500 is arranged on one end of the outer stator housing 110 and covers the heat dissipation fin element 300, and finally the heat dissipation fin body 310 is in thermal contact with the inner One end of the rotor cylinder 210 is used to dissipate the heat generated by the outer stator 100 and the inner rotor 200 through wind convection heat dissipation, so as to achieve the purpose of wind convection to dissipate heat energy, and to quickly assemble and stabilize each component and structure The effect.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be defined by the scope of the appended patent application.

10: Wireless power transmission device

110: Outer stator housing

500: cooling fan

Claims (8)

A wireless power transmission device for a rotating LED display, which accepts an AC power source and conducts power through non-contact electromagnetic induction. The wireless power transmission device includes: an outer stator, which includes: an outer stator shell with An accommodating space and a plurality of ventilation holes penetrating in the direction of extension, an outer stator coil accommodating groove surrounding the outer stator housing is formed on the inner side of the outer stator housing; and an outer stator coil is arranged on The outer stator coil accommodation slot is electrically connected to the AC power supply; an inner rotor, the inner rotor includes: an inner rotor cylinder, the outer side of the inner rotor cylinder forms an inner rotor cylinder surrounding the inner rotor cylinder a rotor coil accommodating slot, and the inner rotor column system is arranged in the accommodating space of the outer stator housing; and an inner rotor coil, and the inner rotor coil is arranged in the inner rotor coil accommodating slot; two cooling fins a component is arranged in the accommodating space of the outer stator housing, contacts each end of the inner rotor cylinder, and conducts the heat generated by the inner rotor; and a cooling fan is arranged on the inner rotor, And cover the cooling fin element for convection cooling the heat conducted by the fin and the heat generated by the outer stator and the inner rotor; wherein the inner rotor cylinder is a metal cylinder, and the inner rotor cylinder includes an upper cylinder part and a lower cylinder part, the upper cylinder part and the lower cylinder part are mutually combined towards the inner rotor coil, so that the inner rotor coil is maintained fixed on the upper cylinder part and the lower cylinder part The inner rotor coil accommodating groove is formed. The wireless power transmission device as described in Claim 1 further includes two bearing elements, which are respectively corresponding to the two ends of the inner rotor cylinder and arranged in the accommodation space of the outer stator casing, and are used for the inner rotor cylinder The body remains fixed and rotates in the accommodating space of the outer stator housing. The wireless power transmission device as claimed in claim 1, wherein the outer stator housing is a metal housing, wherein the outer stator housing includes an upper housing part and a lower housing part, the upper housing part and the lower housing The body part is opposed to the outer stator coil and combined with each other, so that the outer stator coil is maintained and fixed in the outer stator coil accommodating groove jointly formed by the upper case part and the lower case part. The wireless power transmission device as claimed in claim 1, wherein the heat dissipation fin element includes a heat dissipation fin body and a plurality of heat dissipation fins, the heat dissipation fin body is arranged corresponding to one end of the inner rotor cylinder, and the heat dissipation fins It is connected to the body of the cooling fins and spreads out equidistantly. A method for assembling a wireless power transmission device for a rotating LED display. The wireless power transmission device accepts an AC power source and conducts power through non-contact electromagnetic induction. It includes an outer stator, an inner rotor, two cooling fin elements and A heat dissipation fan, the outer stator includes an outer stator shell and an outer stator coil, the outer stator shell has an accommodating space and a plurality of ventilation holes penetrating in the extending direction, the inner side of the outer stator shell forms An outer stator coil accommodating slot surrounding the outer stator casing, the outer stator coil is electrically connected to the AC power supply, the inner rotor includes an inner rotor cylinder and an inner rotor coil, the outer rotor cylinder of the inner rotor a ring formed on the side The inner rotor coil accommodating groove around the inner rotor cylinder, the inner rotor cylinder is a metal cylinder, the inner rotor cylinder includes an upper cylinder part and a lower cylinder part, wherein the assembly method includes the following steps: e ') The upper cylinder part and the lower cylinder part are opposed to and combined with each other towards the inner rotor coil, so that the inner rotor coil is maintained and fixed on the inner rotor coil formed by the upper cylinder part and the lower cylinder part accommodating slot; a) the outer stator coil is set in the outer stator coil accommodating slot, the inner rotor coil is set in the inner stator coil accommodating slot; b) the inner rotor cylinder is set in the inner rotor coil accommodating slot ; c) the heat dissipation fin element is arranged in the accommodation space of the outer stator housing, and contacts each end of the inner rotor cylinder, and conducts the heat generated by the inner rotor; and d) the heat dissipation fan is arranged in One end of the inner rotor cylinder covers the cooling fin element for convective cooling of the heat conducted by the fin and the heat generated by the inner rotor. The assembly method as described in claim 5, wherein the wireless power transmission device further includes two bearing elements, wherein the step b) further includes a step b1) the bearing elements respectively correspond to the two ends of the inner rotor cylinder and It is arranged in the accommodating space of the outer stator housing, and is used for the inner rotor cylinder to maintain fixed and rotate in the accommodating space of the outer stator housing. The assembly method as described in claim 5, wherein the outer stator casing is a metal casing, wherein the outer stator casing includes an upper casing part and a lower casing part, and the assembly method further includes a step a) previous step e) the upper housing part and the lower housing part relative to the outer stator wire The coils are combined with each other, so that the outer stator coil is maintained and fixed in the outer stator coil accommodating groove jointly formed by the upper housing part and the lower housing part. The assembly method as described in claim 5, wherein the heat dissipation fin element includes a heat dissipation fin body and a plurality of heat dissipation fins, and these heat dissipation fins are connected to the heat dissipation fin body and spread out equidistantly, the step d is further Including a step d1) the cooling fin body is arranged corresponding to one end of the inner rotor cylinder.

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