TWI632763B - Motor and electromagnetic interference protection device for motor - Google Patents

Abstract

The invention relates to a motor and an electromagnetic interference protection device for the motor. The motor includes a base, a shaft tube, a subset, a rotor set, a circuit board, a conductive element, and an extension grounding device. The shaft tube is disposed on the base. The stator set is disposed on an outer circumference of the shaft tube. The rotor set is rotatably disposed on the shaft tube. The circuit board is disposed on an outer circumference of the shaft tube and electrically connected to the stator group, the circuit board having at least one ground end. The conductive component is electrically connected to the at least one ground. The extension grounding device is disposed on the base and electrically connected to the conductive element. Electrically connecting the grounding end of the circuit board and the extending grounding device to extend the ground of the circuit board to the extended grounding device, improve the grounding effect, and utilize the extended grounding device with a larger range and area It can improve the effect of electromagnetic interference protection.

Description

Motor and electromagnetic interference protection device for motor

[0001] The present invention relates to a motor and an electromagnetic interference protection device for the motor.

[0002] It is known that the electromagnetic interference protection of the motor is poor, and components or devices adjacent to the motor are likely to suffer electromagnetic interference, which may cause the components or devices of the adjacent motor to operate abnormally.

[0003] The present invention provides a motor. In one embodiment, the motor includes a base, a shaft tube, a certain subgroup, a rotor group, a circuit board, a conductive element, and an extended grounding device. The shaft tube is disposed on the base. The stator group is disposed on the outer periphery of the shaft tube. The rotor group is rotatably disposed on the shaft tube. The circuit board is disposed on the outer periphery of the shaft tube and is electrically connected to the stator group. The circuit board has at least one ground terminal. The conductive element is electrically connected to the at least one ground terminal. The extended grounding device is disposed on the base, and is electrically connected to the conductive element. [0004] The present invention provides an electromagnetic interference protection device for a motor. In one embodiment, the electromagnetic interference protection device includes: a base, a circuit board, a conductive element, and an extended grounding device. The base includes a first surface and a second surface, and the second surface is opposite to the first surface. The circuit board is disposed on the first surface of the base, and the circuit board has at least one ground terminal. The conductive element is electrically connected to the at least one ground terminal. The extended grounding device is disposed on the base, and is electrically connected to the conductive element. [0005] By using the motor and the electromagnetic interference protection device of the present invention, the conductive element is electrically connected to the ground terminal of the circuit board and the extended grounding device, so that the grounding of the circuit board can be extended to the extended grounding device to enhance Grounding effect, and the extended grounding device with a larger range and area can improve the effect of electromagnetic interference protection.

[0010] FIG. 1 shows an exploded view of the motor of the present invention. FIG. 2 is a schematic cross-sectional view of a motor according to the present invention. With reference to FIG. 1 and FIG. 2, the motor 10 of the present invention has electromagnetic interference protection, which can prevent components adjacent to the motor from being subjected to electromagnetic interference. The motor 10 includes a base 11, a shaft tube 12, a certain sub-group 13, a rotor group 14, a circuit board 15, a conductive element 16, and an extended grounding device 17. [0011] In an embodiment, the base 11 includes a first surface 111 and a second surface 112, and the second surface 112 is opposite to the first surface 111. The shaft tube 12 is disposed on the base 11, and the shaft tube 12 is disposed on the first surface 111 of the base 11. In one embodiment, the shaft tube 12 is a metal shaft tube. [0012] The stator group 13 is disposed on the outer periphery of the shaft tube 12. The rotor group 14 is rotatably disposed on the shaft tube 12. The rotor group 14 includes a motor case 141, a permanent magnet 142 and a central shaft 143. The central shaft 143 is rotatably disposed in the shaft tube 12. The permanent magnet 142 is disposed inside the motor case 141. [0013] The circuit board 15 is disposed on the outer periphery of the shaft tube 12, and is electrically connected to the stator group 13. The circuit board 15 has at least one ground end 151. In addition, the circuit board 15 is disposed in a direction of the first surface 111 of the base 11. [0014] The conductive element 16 is electrically connected to the at least one ground terminal 151. The extended grounding device 17 is disposed on the base 11 and is electrically connected to the conductive element 16. In one embodiment, the conductive element 16 is a conductive elastic sheet that can be flexibly bent to electrically connect the ground terminal 151 and the extended grounding device 17 of the circuit board 15. In one embodiment, the conductive element 16 is in the shape of an "8", and the two ends of the conductive element 16 are elastically movable and not fixed. Therefore, the conductive element can be elastically compressed according to the different setting heights of the circuit board 15. 16 to enable the conductive element 16 to be electrically connected to the ground terminal 151 of the circuit board 15 and the extended grounding device 17 smoothly. [0015] The conductive element 16 is electrically connected to the ground terminal 151 of the circuit board 15 and the extended grounding device 17, so that the ground of the circuit board 15 can be extended to the extended grounding device 17, to improve the grounding effect, and to make use of The large-scale and large-area extension grounding device 17 can improve the effect of electromagnetic interference protection. [0016] In an embodiment, the extended grounding device 17 includes at least two conductive materials, the conductivity of which is different, for example: silver, copper, gold, aluminum, or iron, and the conductivity of copper is greater than that of iron. Conductivity. In one embodiment, the conductive element 16 contacts one of the conductive materials of the extended grounding device 17, and the conductive material (for example, copper) in contact with it has a higher conductivity than the other conductive materials of the extended grounding device 17 (for example: Iron) has high electrical conductivity. In one embodiment, the extended grounding device 17 includes at least one copper block 171 and a metal plate 172, and the conductive element 16 contacts the at least one copper block 171. The metal plate 172 may be an iron plate. The at least one copper block 171 is disposed in the metal plate 172, and the conductive element 16 may also be copper. Since the conductivity of copper is greater than that of iron, using the conductive element 16 and at least one copper block 171 can improve Electrical conductivity and conductive effect of the ground terminal 151 of the circuit board 15 to the extended grounding device 17. [0017] In an embodiment, the at least one copper block 171 may be combined with the metal plate 172 by punching, and the thickness of the at least one copper block 171 may be the same as the thickness of the metal plate 172, so that the at least one copper block The surface of 171 is flush with the surface of the metal plate 172. In an embodiment, the thickness of the at least one copper block 171 may be smaller than the thickness of the metal plate 172, or the surface of the at least one copper block 171 is slightly concaved than the surface of the metal plate 172, so that the conductive element 16 can contact The at least one copper block 171 restricts the position of the conductive element 16 to prevent the conductive element 16 from moving. [0018] In an embodiment, the extended grounding device 17 is disposed on the second surface 112. The base 11 further includes a receiving groove 113 disposed on the second surface 112 for receiving the extended grounding device 17. The receiving groove 113 has a ring shape, and is matched with the shape of the extension grounding device 17. [0019] In an embodiment, the extension grounding device 17 further includes a central hole 173 and a plurality of extensions 174. The central hole 173 is used to receive the shaft tube 12, and the extensions 174 are formed by the metal plate. 172 extends outward, and is used to be combined with the base 11 for injection molding. In one embodiment, the extensions 174 may have at least one hole, which is advantageous for forming and bonding with the base 11 by injection molding, so as to make the bonding more stable. [0020] FIG. 3 is a schematic diagram showing a combination of an extended grounding device and a base of the present invention. With reference to FIG. 1 and FIG. 3, in an embodiment, the base 11 further includes a through hole 114. Part of the through hole 114 is located at a relative position of the receiving groove 113, that is, a part of the receiving groove 113 is penetrated by the part of the through hole 114. When the extension grounding device 17 is combined with the base 11 and is disposed in the receiving groove 113, part of the extension grounding device 17 may be viewed from the first surface 111 of the base 11 toward the first surface 111. The direction is exposed to be electrically connected to the conductive element 16. In an embodiment, the exposed portion of the extended grounding device 17 on the first surface includes the at least one copper block 171, so that the conductive element 16 can be in contact with and electrically connected to the at least one copper block. [0021] In an embodiment, the extended grounding device 17 further includes a notch 175, which is located at a relative position of the part of the through hole 114. Through the gap 175, a plurality of external terminals (not shown) of the circuit board 15 can be exposed on the second surface 112 of the base 11. The external terminals are connected to a plurality of connection wires (not shown in the figure). (Shown) to the outside world. Therefore, the use of the notch 175 can facilitate the operator to change the connection lead. [0022] In an embodiment, the base 11 further includes a wire groove 115 disposed on the second surface 112 and connected to the through hole 114 for receiving the connecting wires of the circuit board 15 to avoid connecting wires. Exposed and damaged. [0023] In one embodiment, the shaft tube 12 is a metal shaft tube and is disposed in the extended grounding device 17, that is, the shaft tube 12 is disposed in the center hole 173 of the extended grounding device 17. The shaft tube 12 is electrically connected to the extended grounding device 17, which can increase the grounding area and range to improve the grounding effect and further improve the effect of electromagnetic interference protection. [0024] FIG. 4 shows a schematic diagram of the shaft tube and the extended grounding device integrally formed according to the present invention. Referring to FIG. 4, in an embodiment, the shaft tube is a metal shaft tube, and is integrally formed with the extension grounding device 27. Therefore, the extended grounding device 27 includes a shaft tube portion 271 and a metal plate 272. The shaft tube portion 271 can be used as a shaft tube, and a central shaft of a rotor group of the motor is rotatably disposed in the shaft tube portion 271. The extended grounding device 27 further includes a copper block 273 disposed on the metal plate 272. [0025] With reference to FIG. 1 and FIG. 4, in one embodiment, the conductive element 16 can be electrically connected to the ground terminal 151 of the circuit board 15 to the shaft tube portion 271 of the extended grounding device 27. Similarly, The grounding of the circuit board 15 can be extended to the extended grounding device 27, which has the effect of improving the grounding effect and the protection of electromagnetic interference. [0026] Please refer to FIG. 1 again. In one embodiment, the present invention provides an electromagnetic interference protection device for a motor. The electromagnetic interference protection device includes a base 11, a circuit board 15, a conductive element 16, and an extended grounding device 17. By using the electromagnetic interference protection device, the conductive element 16 is electrically connected to the ground terminal 151 of the circuit board 15 and the extended ground device 17, so that the ground of the circuit board 15 can be extended to the extended ground device 17 to improve the grounding effect. The use of the extended grounding device 17 with a larger range and area can improve the effect of electromagnetic interference protection. [0027] The above embodiments are only for explaining the principle of the present invention and its effects, but not for limiting the present invention. Modifications and changes made by those skilled in the art to the above embodiments still do not violate the spirit of the present invention. The scope of rights of the present invention should be listed in the scope of patent application described later.

10‧‧‧ Motor

11‧‧‧ base

12‧‧‧ shaft tube

13‧‧‧Stator set

14‧‧‧rotor set

15‧‧‧Circuit Board

16‧‧‧ conductive element

17‧‧‧ Extended Grounding Device

27‧‧‧ Extended Grounding Device

111‧‧‧first surface

112‧‧‧Second surface

113‧‧‧Receiving trough

114‧‧‧through hole

115‧‧‧ trunking

141‧‧‧Motor housing

142‧‧‧Permanent magnet

143‧‧‧center axis

151‧‧‧ Ground

171‧‧‧copper

172‧‧‧Metal plate

173‧‧‧Center hole

174‧‧‧ extension

175‧‧‧ gap

271‧‧‧Shaft Tube Department

272‧‧‧metal plate

273‧‧‧copper

[0006] FIG. 1 shows an exploded schematic view of the motor of the present invention; [0007] FIG. 2 shows a schematic cross-sectional view of the motor of the present invention; [0008] FIG. 3 shows a schematic view of the extension grounding device of the present invention combined with a base; and [0009] FIG. 4 shows a schematic diagram of the shaft tube and the extension grounding device integrally formed according to the present invention.

Claims (25)

A motor includes: a base; a shaft tube provided on the base; a certain subgroup provided on the outer periphery of the shaft tube; a rotor group rotatably provided on the shaft tube; a circuit board provided on the shaft The circuit board has at least one ground terminal; a conductive element electrically connected to the at least one ground terminal; and an extended grounding device disposed on the base and electrically connected to the conductor Element; wherein the shaft tube is a metal shaft tube and is integrally formed with the extension grounding device. A motor includes: a base; a shaft tube provided on the base; a certain subgroup provided on the outer periphery of the shaft tube; a rotor group rotatably provided on the shaft tube; a circuit board provided on the shaft The circuit board has at least one ground terminal; a conductive element electrically connected to the at least one ground terminal; and an extended grounding device disposed on the base and electrically connected to the conductor Element; wherein the shaft tube is a metal shaft tube, is disposed on the extended grounding device, and is electrically connected to the extended grounding device. For example, the motors of items 1 and 2, wherein the extended grounding device includes at least two conductive materials, and the conductivity of the at least two conductive materials is different. For example, the motor of claim 3, wherein the conductive element contacts one of the conductive materials of the extended grounding device, and the conductivity of the conductive material in contact is higher than that of the other conductive material of the extended grounding device. The motor of claim 4, wherein the extended grounding device includes at least one copper block and a metal plate, and the conductive element contacts the at least one copper block. A motor includes: a base; a shaft tube provided on the base; a certain subgroup provided on the outer periphery of the shaft tube; a rotor group rotatably provided on the shaft tube; a circuit board provided on the shaft The outer periphery of the tube is electrically connected to the stator group, the circuit board has at least one ground end; a conductive element is electrically connected to the at least one ground end, the conductive element is a conductive spring piece; and an extended grounding device is provided at The base is electrically connected to the conductive element. For example, the motor of item 6, wherein the conductive element is "8". A motor includes: a base; a shaft tube provided on the base; a certain subgroup provided on the outer periphery of the shaft tube; a rotor group rotatably provided on the shaft tube; a circuit board provided on the shaft The circuit board has at least one ground terminal; a conductive element electrically connected to the at least one ground terminal; and an extended grounding device disposed on the base and electrically connected to the conductor Component; wherein the base includes a first surface and a second surface, the second surface is opposite to the first surface, the circuit board is disposed on the first surface, and the extension grounding device is disposed on the second surface, the The base further includes a receiving groove disposed on the second surface for receiving the extended grounding device. If the motor of item 8 is requested, the extension grounding device further includes a center hole and a plurality of extensions, the center hole is used to receive the shaft tube, and the extensions are extended outward to connect with the base Seat shot package molding combined. According to the motor of claim 8, wherein the base further includes a through hole, a part of the through hole is located at a relative position of the receiving groove, so that part of the extended grounding device is exposed in a direction toward the first surface. The motor according to item 10, wherein the extension grounding device further comprises a gap, which is located at a relative position of the through hole of the part. For example, the motor of claim 10, wherein the base further includes a wire groove, which is disposed on the second surface and connected to the through hole for receiving a plurality of connection wires of the circuit board. An electromagnetic interference protection device for a motor includes: a base including a first surface and a second surface, the second surface being opposite to the first surface; and a circuit board disposed on the first surface of the base. A surface, the circuit board has at least one ground end; a conductive element electrically connected to the at least one ground end; an extended grounding device disposed on the base to electrically connect the conductive element; and a shaft tube disposed on the The base, the shaft tube is a metal shaft tube, is disposed on the extended grounding device, and is electrically connected to the extended grounding device. For example, the electromagnetic interference protection device for a motor according to item 13, wherein the shaft tube and the extension grounding device are integrally manufactured. For example, the electromagnetic interference protection device for a motor according to claim 13 and 14, wherein the extended grounding device further includes at least two conductive materials, and the conductivity of the at least two conductive materials is different. For example, the electromagnetic interference protection device for a motor according to item 15, wherein the conductive element contacts one of the conductive materials of the extended grounding device, and the conductive material in contact with the conductive material is more conductive than the other conductive material of the extended grounding device. The conductivity is high. The electromagnetic interference protection device for a motor according to claim 16, wherein the extended grounding device includes at least one copper block and a metal plate, and the conductive element contacts the at least one copper block. An electromagnetic interference protection device for a motor includes: a base including a first surface and a second surface, the second surface being opposite to the first surface; and a circuit board disposed on the first surface of the base. A surface, the circuit board has at least one ground end; a conductive element electrically connected to the at least one ground end, the conductive element is a conductive spring sheet; and an extended grounding device is disposed on the base and is electrically connected to the base Conductive element. For example, the electromagnetic interference protection device for a motor according to item 18, wherein the conductive element is "8". An electromagnetic interference protection device for a motor includes: a base including a first surface and a second surface, the second surface being opposite to the first surface; and a circuit board disposed on the first surface of the base. A surface, the circuit board has at least one ground terminal; a conductive element electrically connected to the at least one ground terminal; and an extended grounding device disposed on the base and electrically connected to the conductive element, the extended grounding device is disposed on The second surface. For example, the electromagnetic interference protection device for a motor according to claim 20, wherein the base further includes a receiving groove provided on the second surface for receiving the extended grounding device. For example, the electromagnetic interference protection device for a motor according to item 21, wherein the extension grounding device further has a center hole and a plurality of extensions, and the center hole is used to receive the shaft tube, and the extensions are outward Extended for combining with the base to shoot the package. For example, the electromagnetic interference protection device for a motor according to item 21, wherein the base further includes a through hole, and a part of the through hole is located at a relative position of the receiving groove, so that part of the extended grounding device is directed toward the first surface. Revealed. For example, the electromagnetic interference protection device for a motor according to item 23, wherein the extended grounding device further includes a gap, which is located at a relative position of the through hole of the part. For example, the electromagnetic interference protection device for a motor according to item 23, wherein the base further includes a wire groove, which is disposed on the second surface and connected to the through hole for receiving a plurality of connection wires of the circuit board.