TWI422123B - An axial flux winding device and a motor including the axial flux winding device - Google Patents

Description

Axial flux winding device and motor including the same

The present invention relates to a winding device and a motor including the same, and more particularly to an axial flux winding device and a motor including the same.

The conventional inner rotor thin motor and the thin vibration motor (refer to US Pat. No. 6,417,589 and US Pat. No. 6,479,914) are mostly radial magnetic flux and have a structure with a core winding. Then, in order to make the motor thinner, the inner rotor thin motor is mostly designed with axial magnetic flux and no core (refer to US 6,534,886, US 7,157,823 and US 6,005,324). Among them, US 6,534,886 discloses a design that uses axial magnetic flux and no iron core to thin the motor vibration motor. In US Pat. No. 7,157,823, the arrangement of the concentrated winding winding coil and the line wiring on the thin vibration motor circuit board is further miniaturized.

The inner rotor thin motor adopts the axial magnetic flux design, which can effectively thin the motor. However, since the magnet has only one side corresponding winding with suction, only one single-sided stator provides magnetic conduction, and there is bearing wear and low efficiency. problem. In order to improve the disadvantage that the magnet has only one side to generate suction, the inner rotor and the axial flux thin motor can adopt a sandwich structure of double-sided winding (refer to US 6,940,206). Such an axial flux thin motor having a double-sided winding structure, whether using a winding coil configuration design or applying a winding circuit to a circuit board design, requires a double-sided winding circuit, so that two sides are required. The line connection design between the winding lines.

Therefore, it is necessary to provide an innovative and progressive axial flux winding device and a motor including the axial flux winding device to solve the above problems.

The invention provides an axial flux winding device for being disposed on opposite sides of a rotor. The axial flux winding device includes a flexible substrate and a winding set. The flexible substrate has at least two carrier plates and at least one bridge portion. The at least two carrier plates are located on opposite sides of the rotor, and the at least one bridge portion connects the at least two carrier plates. The winding group has at least two winding units and at least one internal line connecting the at least two winding units, each winding unit is disposed on a corresponding carrier and has at least one winding structure, wherein the at least one internal line is located at the At least one bridge.

The invention further provides an axial flux motor comprising a rotor, a housing and the axial flux winding arrangement described above. The rotor has a shaft. The carrier on at least one side of the rotor has a uniform aperture for the shaft to pass through. The housing has a base and a cover, and the rotating shaft passes through the through hole at least and is disposed on the base such that the winding device is located between the base and the cover.

The winding group and the flexible substrate can be implemented in the same process, which simplifies the line distribution of the axial flux winding device, the manufacturing process, and improves the problem of additional wiring connection between the winding units. Therefore, the reuse of resources is reduced, the cost is reduced, the motor circuit structure is stabilized, and the space is thinned to save space. Moreover, through the design and configuration of the axial flux winding device of the present invention, the concentrated winding or distributed winding effect can be achieved, and the winding group can be a multi-layer structure, so that the number of turns of the winding can be increased. Furthermore, the axial flux winding device of the present invention can effectively simplify the assembly process of the axial flux motor, and can be bent and flexed on opposite sides of the rotor, so that the size of the axial flux motor can be made. Miniaturization.

1 is a schematic exploded view of an axial flux winding device according to a preferred embodiment of the present invention; FIG. 2 is a schematic view showing a rotor of the present invention; and FIG. 3 is a view showing the axial flux winding device of the present invention disposed on opposite sides of a rotor. Schematic diagram. Referring to FIG. 1, FIG. 2 and FIG. 3, the axial flux winding device 1 of the present invention is disposed on opposite sides of a rotor 2. The axial flux winding device 1 includes a flexible substrate 11 and a winding set 12. It should be noted that the rotor 2 can also be an eccentric rotor (as shown in Figure 4) depending on the application requirements (e.g., vibration).

The flexible substrate 11 has at least two carrier plates and at least one bridge portion. The at least two carrier plates are located on opposite sides of the rotor 2. The at least one bridge portion connects the at least two carrier plates. Preferably, the flexible substrate 11 is a flexible printed circuit board. In the embodiment, the flexible substrate 11 includes two carrier plates 111, a bridge portion 112 and an outer extension portion 113. The outer extension portion 113 is connected to one of the carrier plates 111. Here, after the flexible substrate 11 is unfolded, the carrier plates 111 are arranged in series (as shown in FIG. 1).

The winding group 12 has at least two winding units and at least one internal line connecting the at least two winding units, each winding unit being disposed on a corresponding carrier and having at least one winding structure. In this embodiment, the winding group 12 has two winding units 121, an internal line 122 and an external line 123. Each winding unit 121 is disposed on the corresponding carrier plate 111 and has six winding structures 124. The internal line 122 is located at the bridge portion 112, and the external line 123 is disposed on the outer extension portion 113. It should be noted that each of the winding units 121 may have the same winding structure, or each of the winding units 121 may have a different winding structure.

The winding units 121 are disposed at least on one side of the flexible substrate 11. It can be understood that if the winding group 12 has more winding units and internal lines, the winding units 121 can be disposed on opposite sides of the flexible substrate 11 and, in addition, those skilled in the art. It can also be understood that the flexible substrate 11 can be a multi-layer board structure for a plurality of winding units and internal wiring. In this embodiment, the winding units 121 are disposed on the opposite sides of the flexible substrate 11 adjacent to the rotor 2 . It can be understood that the winding units 121 can be disposed on opposite sides of the flexible substrate 11 away from the rotor 2, that is, the winding units 121 are disposed on the flexible substrate 11 after bending. The outer surface.

In addition, referring to FIG. 5 and FIG. 6, in different applications, the flexible substrate 11 may include a first number of carrier boards and a plurality of bridge portions, and the winding group 12 includes the first number of winding units. And the same number of internal lines as the bridges, preferably, the first number is an even number greater than 2, and each half of the first number of carrier and winding units are respectively layered on a rotor On the opposite side, but not limited thereto, the number of carrier plates and winding units located on opposite sides of the rotor may be different. It is to be noted that after the flexible substrate 11 is unfolded, the carrier plates may be arranged in a tandem or array.

For example, in FIG. 5, the flexible substrate 11 of the axial flux winding device 1 includes four (first number) carrier plates 111 and three bridge portions 112, and the axial flux winding device 1 The winding group 12 includes four winding units 121. After the axial flux winding device 1 is deployed, the carrier plates 111 are arranged in series, and the axial flux winding device 1 is appropriately folded. After (for example, after folding, the two end portions are respectively folded back), each two (one-half first number) carrier plate 111 and two winding units 121 are respectively disposed on opposite sides of the rotor 2 (Setting manner can refer to FIG. 3); in FIG. 6, the flexible substrate 11 of the axial flux winding device 1 includes six (first number) carrier plates 111 and five bridge portions 112, and The winding group 12 of the axial flux winding device 1 includes six winding units 121. After the axial flux winding device 1 is deployed, the carrier plates 111 are arranged in an array, and the axial flux windings are arranged. After the device 1 is properly folded (for example, after folding, the two end portions are respectively refolded twice), every three (one-half first number) carrier plate 111 and three winding units 121 are They are respectively disposed on opposite sides of the rotor 2 (refer to FIG. 3 for setting manner).

The rotor 2 in the above embodiment has a structure of a shaft hole 22 (refer to Fig. 2), and it is emphasized that in other applications, the rotor 2 of the present invention may have a shaft 21 (refer to Figs. 7 and 8). The carrier plate 111 on at least one side of the rotor 2 has a constant hole 114 for the rotating shaft 21 to pass through. For example, referring to FIG. 7, the rotating shaft 21 is axially disposed on one side of the rotor 2. The carrier 111 on the side of the rotor 2 has a constant hole 114, and the carrier 111 on the other side of the rotor 2 does not have a through hole, the rotating shaft 21 is disposed through the through hole 114, such that the axial flux winding device 1 is disposed on opposite sides of the rotor 2; or referring to FIG. 8, or the rotating shaft 21 is axially disposed on the rotor 2 On opposite sides, the carrier plates 111 on opposite sides of the rotor 2 have through holes 114, and the rotating shafts 21 are respectively passed through the through holes 114 such that the axial flux winding device 1 is disposed on the opposite side of the rotor 2. side.

In application, the axial flux winding device 1 of the present invention can be widely applied to a micro fan motor, a hard disk or a CD spindle motor, a mobile phone vibrator, a micro pump, a micro generator, a heat dissipation module, and has a thin shape. Motor electronics.

Figure 9 shows an exploded view of an axial flux motor in accordance with a preferred embodiment of the present invention. Referring to FIGS. 1, 3 and 9, the axial flux motor 3 includes a rotor 2, a housing 31 and an axial flux winding device 1. The axial flux winding device 1 is the axial flux winding device 1 shown in FIG. 3 and will not be described again. In the present embodiment, a shaft 21 is provided in the shaft hole 22 of the rotor 2. The carrier plate 111 on at least one side of the rotor 2 has a constant hole 114 through which the rotating shaft 21 is bored.

In this embodiment, the rotating shaft 21 is axially disposed on opposite sides of the rotor 2 through the shaft hole 22 . It can be understood that the rotor 2 can also be as shown in FIG. 7 or FIG. 8 , and the rotating shaft 21 is axially disposed on the rotor 2 formed on one side or opposite sides.

Each carrier plate 111 has a uniform aperture 114 that corresponds to the shaft aperture 22. The housing 31 has a base 311 and a cover 312. The shaft 21 is disposed through the shaft hole 22 and the through holes 114 are disposed on the base 311 and the cover 312, so that the base 311 and the base 311 After the cover 312 is combined, the winding device 1 is located between the base 311 and the cover 312.

In the present embodiment, the axial flux motor 3 includes the axial flux winding device 1 shown in FIG. 3, however, it can be understood that the axial flux motor 3 can also have an eccentricity as shown in FIG. An axial flux motor of the axial flux winding device 1 of the rotor 2. Alternatively, the axial flux motor 3 may also be an axial flux motor having an axial flux winding device 1 of the winding assembly 12 of FIG. 5 or FIG. 6, and the rotor 2 may be FIG. 2 or Rotor 2 shown in 4.

Referring to FIG. 7 and FIG. 10, if the rotating shaft 21 is axially disposed on one side of the rotor 2 (close to the base 311), the carrier 111 on the side of the rotor 2 has a constant hole 114 in the rotor 2. The carrier plate 111 on the other side does not need to have a through hole, and the rotating shaft 21 passes through the through hole 114 and is disposed on the base 311 such that the axial flux winding device 1 is disposed on the rotor 2 Two sides, and the axial flux winding device 1 is located between the base 311 and the cover 312.

In the present invention, the winding group 12 and the flexible substrate 11 can be applied to the same printed circuit board in the same process, which simplifies the line distribution, the manufacturing process, and the improvement of the axial flux winding device 1. The problem of additional line connection between the winding units 121 is required, so that the reuse of resources is reduced, the cost is reduced, the structure of the motor circuit is stabilized, and the space is thinned to save space. Moreover, through the design and configuration of the axial flux winding device 1 of the present invention, a concentrated winding or distributed winding effect can be achieved, and the winding group 12 can have a multi-layer structure, so that the number of turns of the winding can be increased. Furthermore, the axial flux winding device 1 of the present invention can effectively simplify the assembly process of the axial flux motor 3, and can be bent and flexed on opposite sides of the rotor 2, so that the axial flux can be made The size of the motor 3 is miniaturized.

The above embodiments are merely illustrative of the principles and effects of the invention and are not intended to limit the invention. Therefore, those skilled in the art can make modifications and changes to the above embodiments without departing from the spirit of the invention. The scope of the invention should be as set forth in the appended claims.

1. . . Axial flux winding device of the invention

2. . . Rotor

3. . . Axial flux motor of the present invention

11. . . Flexible substrate

12. . . Winding group

twenty one. . . Rotating shaft

twenty two. . . Shaft hole

31. . . case

111. . . Carrier board

112. . . Bridge

113. . . External extension

114. . . Through hole

121. . . Winding unit

122. . . Internal line

123. . . External line

124. . . Winding structure

311. . . Pedestal

312. . . Cover

1 is a schematic exploded view showing an axial flux winding device of a preferred embodiment of the present invention;

Figure 2 shows a schematic view of a rotor of the present invention;

3 is a schematic view showing the axial flux winding device of the present invention disposed on opposite sides of the rotor;

Figure 4 shows a schematic view of an eccentric rotor of the present invention;

Figure 5 is a schematic view showing the winding group arranged in series after the expansion of the present invention;

Figure 6 is a schematic view showing the winding group arranged in an array after the development of the present invention;

Figure 7 is a cross-sectional view showing another aspect of the axial flux winding device of the present invention;

Figure 8 is a cross-sectional view showing still another aspect of the axial flux winding device of the present invention;

Figure 9 shows an exploded view of an axial flux motor in accordance with a preferred embodiment of the present invention;

Figure 10 is a cross-sectional view showing an axial flux motor in accordance with another embodiment of the present invention.

1. . . Axial flux winding device of the invention

2. . . Rotor

111. . . Carrier board

112. . . Bridge

113. . . External extension

114. . . Through hole

Claims (29)

An axial flux winding device is disposed on opposite sides of a rotor, the axial flux winding device comprising: a flexible substrate having at least two carrier plates and at least one bridge portion, the at least two carrier plates being located And opposite sides of the rotor, the at least one bridge portion is connected to the at least two carrier boards; and a winding group has at least two winding units and at least one internal line connecting the at least two winding units, each winding unit is disposed And corresponding to the carrier board and having at least one winding structure, the at least one internal circuit is located at the at least one bridge portion. The axial flux winding device of claim 1, wherein the flexible substrate is a flexible printed circuit board. The axial flux winding device of claim 1, wherein the flexible substrate further comprises an outer extension portion connected to one of the carrier plates, the winding group further comprising an external circuit, the external circuit is disposed on The outer extension. The axial flux winding device of claim 1, wherein the flexible substrate comprises a first number of carrier plates and a plurality of bridge portions, the winding group comprising the first number of winding units and The same number of internal lines are equal to the bridge portion, the first number is an even number greater than 2, and each half of the first number of carrier plates and winding units are respectively layered on opposite sides of the rotor. The axial flux winding device of claim 4, wherein the carrier plates are arranged in series after the flexible substrate is unfolded. An axial flux winding device according to claim 4, wherein the flexible substrate exhibits After opening, the carrier plates are arranged in an array. The axial flux winding device of claim 1, wherein the winding units are disposed at least on one side of the flexible substrate. The axial flux winding device of claim 7, wherein the winding units are disposed on the opposite sides of the flexible substrate adjacent to the rotor. The axial flux winding device of claim 7, wherein the winding units are disposed on opposite sides of the flexible substrate away from the rotor. The axial flux winding device of claim 1, wherein the winding units are disposed on opposite sides of the flexible substrate. The axial flux winding device of claim 1, wherein each of the winding units has the same winding structure. The axial flux winding device of claim 1, wherein each of the winding units has a different winding structure. The axial flux winding device of claim 1 is further disposed on opposite sides of an eccentric rotor. The axial flux winding device of claim 1, which is applied to a micro fan motor, a hard disk or a CD spindle motor, a mobile phone vibrator, a micro pump, a micro generator, and an electronic product having a thin motor. An axial flux motor comprising: a rotor having a rotating shaft; and an axial flux winding device disposed on opposite sides of the rotor, the axial flux winding device comprising: a flexible substrate having at least a second carrier plate and at least one bridge portion, the at least two carrier plates being located on opposite sides of the rotor, at least The carrier plate on one side has a uniform hole for the shaft to pass through, the at least one bridge portion connects the at least two carrier plates; a winding group has at least two winding units and at least one internal line connecting the at least two winding units, Each of the winding units is disposed on the corresponding carrier and has at least one winding structure, the at least one internal circuit is located at the at least one bridge portion; and a housing having a base and a cover, the rotating shaft at least The through hole is disposed on the base such that the winding device is located between the base and the cover. The axial flux motor of claim 15, wherein the flexible substrate is a flexible printed circuit board. The axial flux motor of claim 15, wherein the flexible substrate further comprises an outer extension portion, the outer extension portion is connected to one of the carrier plates, and the winding group further comprises an external circuit, wherein the external circuit is disposed External extension. The axial flux motor of claim 15, wherein the flexible substrate comprises a first number of carrier plates and a plurality of bridge portions, the winding group comprising the first number of winding units and the same The bridge has the same number of internal lines, the first number being an even number greater than 2, and each half of the first number of carrier and winding units are respectively disposed on opposite sides of the rotor. The axial flux motor of claim 18, wherein the carrier plates are arranged in series after deployment of the flexible substrate. The axial flux motor of claim 18, wherein the carrier plates are arranged in an array after the flexible substrate is unfolded. An axial flux motor as claimed in claim 15, wherein the winding unit is configured On one side of the flexible substrate. The axial flux motor of claim 21, wherein the winding units are disposed on the opposite side of the flexible substrate adjacent to the rotor. The axial flux motor of claim 21, wherein the winding units are disposed on opposite sides of the flexible substrate away from the rotor. The axial flux motor of claim 15, wherein the winding units are disposed on opposite sides of the flexible substrate. An axial flux motor as claimed in claim 15, wherein each of the winding units has the same winding configuration. An axial flux motor as claimed in claim 15, wherein each of the winding units has a different winding configuration. The axial flux motor of claim 15, wherein the rotor is an eccentric rotor. The axial flux motor of claim 15, wherein the shaft is disposed on opposite sides of the rotor, and the carrier plates on opposite sides of the rotor have consistent holes, and the rotating shafts respectively pass through the through holes Provided on the base and the cover such that the winding device is located between the base and the cover. The axial flux motor of claim 15 is a micro fan motor, a hard disk or a CD spindle motor, a mobile phone vibrator, a micro pump, a micro generator, a heat dissipation module rotating device, and a thin motor of an electronic product.