CN111987862A - Electric machine with electrostatic discharge protection - Google Patents

Abstract

The invention relates to a motor with electrostatic discharge protection. The motor with electrostatic discharge protection of the present invention includes: a base, a shaft tube, a stator group and a rotor group. The shaft tube is arranged on the base. The rotor set is rotatably arranged on the shaft tube. The stator group is arranged on the outer periphery of the shaft tube. The stator group includes a circuit board. The circuit board has at least one electronic component and at least one grounding section. The at least one grounding section is arranged around the at least one electronic component. Utilizing the at least one grounding section, the electrostatic arc can be discharged through the at least one grounding section. The electrostatic arc will not damage the at least one electronic component and circuit of the circuit board, allowing the motor to operate normally and improving electrostatic discharge protection. ability.

Description

Electric motors with electrostatic discharge protection

The present invention is a divisional application of the invention patent application with the application date of August 5, 2016, the application number is "201610635453.0", and the invention name is "motor with electrostatic discharge protection".

technical field

The present invention relates to a motor with electrostatic discharge protection.

Background technique

Existing motors include circuit boards to control the operation of the motors. When part of the surface of the circuit board of the motor is exposed to the outside world, static electricity is likely to generate arcs to the circuit board of the motor, which may cause damage to the electronic components of the circuit board and the problem that the motor cannot run.

SUMMARY OF THE INVENTION

The present invention provides a motor with electrostatic discharge protection. In one embodiment, the motor with electrostatic discharge protection of the present invention includes: a base, a shaft tube, a stator group and a rotor group. The shaft tube is arranged on the base. The rotor group is rotatably arranged on the shaft tube. The stator group is arranged on the outer periphery of the shaft tube, and the stator group includes a circuit board, the circuit board has at least one electronic component and at least one grounding section, and the at least one grounding section is arranged around the at least one electronic component; the circuit The board further includes a first surface and a second surface; the at least one grounding section is disposed on the peripheral edge of the first surface of the circuit board; the at least one grounding section has at least one breakpoint, and the second surface is located The relative position of the at least one break point is not provided with electronic components or solder joints.

By using the at least one grounding section, the electrostatic arc can be discharged through the at least one grounding section, and the electrostatic arc will not damage the at least one electronic component and circuit of the circuit board, so that the motor can run normally, and the protection against electrostatic discharge can be improved. ability.

Description of drawings

FIG. 1 shows a schematic cross-sectional view of an embodiment of a motor with electrostatic discharge protection according to the present invention;

FIG. 2 shows a schematic diagram of the first side of an embodiment of the circuit board of the motor of the present invention;

FIG. 3 shows a schematic diagram of the second side of an embodiment of the circuit board of the motor of the present invention;

FIG. 4 shows a schematic diagram of the first side of an embodiment of the circuit board of the motor of the present invention;

FIG. 5 shows a schematic cross-sectional view of an embodiment of a motor with electrostatic discharge protection according to the present invention; and

FIG. 6 shows a schematic cross-sectional view of an embodiment of a motor with electrostatic discharge protection according to the present invention.

Description of the symbols in the drawings:

10 Motors with electrostatic discharge protection

11 Pedestal

12 Axle Tube

13 stator group

14 Rotor set

15 circuit boards

25 circuit boards

30 Motors with electrostatic discharge protection

35 circuit boards

40 Motors with electrostatic discharge protection

41 Pedestal

42 Axle Tube

43 stator group

44 Rotor set

45 circuit boards

111 Ring Wall

123 Bearings

132 Winding sleeve

133 Coils

134 Magnetic sheet

141 Motor housing

142 Center shaft

143 Permanent magnets

151 Electronic Components

152 Ground section

153 first side

154 Second side

156 Breakpoints

253 first side

252, 257, 258 Ground Section

261, 262 Breakpoints

351 Electronic Components

352 Ground Section

353 first side

354 Second side

423 Bearings

441 Motor housing

442 Center shaft

443 Permanent Magnets

451 Electronic Components

452 Ground Section

453 first side

454 Second side

455 Coil

Detailed ways

FIG. 1 shows a schematic cross-sectional view of an embodiment of a motor with electrostatic discharge protection according to the present invention. FIG. 2 shows a schematic diagram of a first side of an embodiment of a circuit board of a motor of the present invention. FIG. 3 shows a schematic diagram of the second side of an embodiment of the circuit board of the motor of the present invention. Referring to FIG. 1 to FIG. 3 , the motor 10 with electrostatic discharge protection of the present invention can be applied to fans and the like. The motor 10 with electrostatic discharge protection according to the present invention includes: a base 11 , a shaft tube 12 , a stator group 13 and a rotor group 14 .

The shaft tube 12 is disposed on the base 11 . In one embodiment, at least one bearing 123 is disposed in the axle tube 12 , and the at least one bearing 123 is provided with an axle hole. The stator group 13 is disposed on the outer periphery of the shaft tube 12 . The stator assembly 13 includes a winding sleeve 132 , a coil 133 and at least one magnetic conductive sheet 134 . The coil 133 is wound around the winding sleeve 132 , and the at least one magnetic conductive sheet 134 is combined with the winding sleeve 132 . In one embodiment, the at least one magnetic conductive element 134 may be a silicon steel sheet or other magnetic conductive element.

The rotor set 14 is rotatably disposed on the shaft tube 12 . The rotor set 14 has a motor casing 141 , a central shaft 142 and a permanent magnet 143 . The central shaft 142 is rotatably disposed in the shaft tube 12 , and the central shaft 142 is disposed in the shaft hole of the at least one bearing 123 . The permanent magnet 143 is disposed inside the motor casing 141 .

The stator assembly 13 includes a circuit board 15 . The circuit board 15 is disposed on the outer periphery of the shaft tube 12 and is electrically connected to the coil 133 of the stator assembly 13 . The circuit board 15 has at least one electronic component 151 and at least one grounding section 152 , and the at least one grounding section 152 is disposed around the at least one electronic component 151 . The at least one grounding section 152 is a conductive section. In one embodiment, the at least one grounding section 152 is copper foil or other conductive materials. By using the at least one grounding section 152, the electrostatic arc can be discharged to the grounding end through the at least one grounding section 152, and the at least one electronic component 151 and the circuit of the circuit board 15 will not be damaged, so that the motor can operate normally and improve the Capability of electrostatic discharge protection.

The circuit board 15 further includes a first surface 153 and a second surface 154 , and the at least one ground section 152 is disposed on at least one of the first surface 153 and the second surface 154 . In one embodiment, the at least one ground segment 152 is disposed on the first surface 153 of the circuit board 15 . Wherein, the first surface 153 of the circuit board 15 faces upward. The base 11 includes a ring wall 111 , part of the circuit board 15 is disposed in the ring wall 111 , the first surface 153 of the circuit board 15 is exposed outside a top of the ring wall 111 , and the circuit board 15 is The second surface 154 is under the top of the ring wall 111 , that is, the second surface 154 of the circuit board 15 is hidden within the ring wall 111 . Therefore, the second surface 154 of the circuit board 15 will not be damaged by electrostatic discharge, so the at least one ground section 152 may be disposed on the first surface 153 of the circuit board 15 .

In one embodiment, the at least one electronic component 151 may include an integrated circuit, a resistor, a capacitor, or an inductor, or the like. The integrated circuit may be a CMOS (Complementary Metal Oxide Semiconductor) or the like, and since CMOS is sensitive to static electricity, electrostatic protection is particularly required. The at least one electronic component 151 is disposed on the second surface 154 of the circuit board 15 . The at least one grounding section 152 is disposed on the outer peripheral edge of the first surface 153 of the circuit board 15 . Therefore, when an electrostatic arc is generated, the electrostatic arc will first contact the at least one grounding section 152 and cause the electrostatic arc to be generated. Discharged through the at least one grounding section 152 , the electrostatic arc will not contact the at least one electronic element 151 and the circuit of the circuit board 15 , and will not damage the at least one electronic element 151 and the circuit of the circuit board 15 . The at least one ground section 152 is electrically connected to a power supply negative pole (—), and the power supply negative pole can be a ground terminal. The power supply negative electrode can be disposed on the second surface 154 of the circuit board 15 , and the at least one ground section 152 of the first surface 153 can be electrically connected to the power supply negative electrode of the second surface 154 through a through hole.

In one embodiment, the at least one grounding section 152 of the first surface 153 of the circuit board 15 has at least one break point 156 , and the second surface 154 is not provided with electrons at the relative position of the at least one break point 156 components or solder joints. In the embodiment of FIG. 2 , the at least one ground section 152 of the first surface 153 of the circuit board 15 has a break point 156 .

Referring to FIG. 4 , there is shown a schematic diagram of a first side of an embodiment of a circuit board for a motor of the present invention. The first surface 253 of the circuit board 25 has a plurality of ground segments 252 , 257 , 258 , and a plurality of breakpoints 261 , 262 between the ground segments 252 , 257 , 258 .

Referring to FIG. 5 , it shows a schematic cross-sectional view of an embodiment of a motor with electrostatic discharge protection according to the present invention. Compared to the embodiment of FIG. 1 , the same elements are given the same element numbers in the embodiment of FIG. 5 . Figures 1 and 5 show motors with radial air gaps. The motor 30 with electrostatic discharge protection of the present invention includes: a base 11 , a shaft tube 12 , a stator group 13 and a rotor group 14 .

The stator group 13 includes a circuit board 35 . In one embodiment, the first surface 353 and the second surface 354 of the circuit board 35 are exposed outside the top of the ring wall 111 , and the at least one ground section 352 is disposed on the first surface of the circuit board 35 . The surface 353 and the second surface 354 , that is, the first surface 353 and the second surface 354 both have the at least one grounding section 352 . Since the first surface 353 and the second surface 354 of the circuit board 35 are exposed outside the top of the ring wall 111 , both the first surface 353 and the second surface 354 of the circuit board 35 may be subject to electrostatic discharge. Therefore, the first surface 353 and the second surface 354 are both provided with the at least one grounding section 352, so that the at least one electronic component 351 on the first surface 353 and the second surface 354 of the circuit board 35 and the The wiring will not be damaged by electrostatic discharge.

Referring to FIG. 6 , it shows a schematic cross-sectional view of an embodiment of a motor with electrostatic discharge protection according to the present invention. Figure 6 shows a motor with an axial air gap. The motor 40 with electrostatic discharge protection according to the present invention includes: a base 41 , a shaft tube 42 , a stator group 43 and a rotor group 44 . The shaft tube 42 is disposed on the base 41 . In one embodiment, the shaft tube 42 and the base 41 are integrally formed. At least one bearing 423 is disposed in the shaft tube 42, and the at least one bearing 423 is provided with a shaft hole.

The rotor set 44 is rotatably disposed on the shaft tube 42 . The rotor set 44 has a motor casing 441 , a central shaft 442 and a permanent magnet 443 . The central shaft 442 is rotatably disposed in the shaft tube 42 , and the central shaft 442 is disposed in the shaft hole of the at least one bearing 423 . The permanent magnet 443 is disposed inside the motor casing 441 and faces the stator group 43 in the axial direction.

The stator group 43 is disposed on the outer periphery of the shaft tube 42 . The stator group 43 includes a circuit board 45 . The circuit board 45 has at least one electronic component 451 , at least one grounding section 452 and at least one coil 455 . The at least one grounding section 452 is disposed around the at least one electronic element 451 and the at least one coil 455 . The at least one coil 455 is disposed on the first surface 453 of the circuit board 45 and is axially opposite to the permanent magnet 443 . The at least one coil 455 may be disposed on the first surface 453 of the circuit board 45 after being wound, or the at least one coil 455 may be formed on the first surface 453 of the circuit board 45 by electroforming or etching process, For example: printed coils. The at least one electronic component 451 can be disposed on the first surface 453 or the second surface 454 of the circuit board 45 .

In one embodiment, the first surface 453 and the second surface 454 of the circuit board 45 are exposed outside the base 41 , and the at least one ground section 452 is disposed on the first surface 453 of the circuit board 45 . And the second surface 454 , that is, the first surface 453 and the second surface 454 both have the at least one grounding section 452 . The at least one ground section 452 is disposed on the peripheral edges of the first surface 453 and the second surface 454 of the circuit board 45 , so that the at least one of the first surface 453 and the second surface 454 of the circuit board 45 The coil 455 and the at least one electronic component 451 and the circuit are not damaged by electrostatic discharge.

Experimental results show that, in the existing circuit board without the at least one grounding section, in the electrostatic discharge test, when the static electricity reaches 10KV, the electronic components in the existing circuit board will be damaged. Using the motor with electrostatic discharge protection of the present invention, in the electrostatic discharge test, when the static electricity reaches 15KV, the electronic components in the circuit board of the present invention will not be damaged, and the ability of electrostatic discharge protection is greatly improved.

The above-mentioned embodiments are only to illustrate the principle and effect of the present invention, but not to limit 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 the right of the present invention should be set forth in the scope of the claims.

Claims (7)

1. An electric machine with electrostatic discharge protection, comprising:

a base;

a shaft tube arranged on the base;

a rotor set rotatably disposed on the shaft tube; and

the stator set is arranged on the periphery of the shaft tube and comprises a circuit board, the circuit board is provided with at least one electronic element and at least one grounding section, and the at least one grounding section is arranged on the periphery of the at least one electronic element;

the circuit board further comprises a first surface and a second surface, and the at least one grounding section is arranged on the peripheral edge of the first surface of the circuit board; the at least one grounding section is provided with at least one breakpoint, and no electronic element or welding spot is arranged at the relative position of the second surface at the at least one breakpoint;

wherein the base comprises a ring wall, and part of the circuit board is arranged in the ring wall;

the first surface and the second surface of the circuit board are exposed outside the top of the annular wall, and the at least one grounding section is arranged on the first surface and the second surface of the circuit board.

2. The motor of claim 1, wherein the at least one ground segment is electrically connected to a negative power supply.

3. The motor of claim 1, wherein the stator assembly further comprises a winding sleeve, a coil wound around the winding sleeve, and a plurality of magnetic conductive plates coupled to the winding sleeve.

4. The motor of claim 1, wherein the rotor assembly comprises a motor housing, a central shaft rotatably disposed in the shaft tube, and a permanent magnet disposed inside the motor housing.

5. The electric machine of claim 1, wherein the at least one ground segment is copper foil.

6. The motor of claim 1, wherein the stator assembly further comprises at least one coil disposed on the circuit board.

7. The motor of claim 1, wherein the shaft tube is integrally formed with the base.

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