CN111987862A - Electric machine with electrostatic discharge protection - Google Patents
Electric machine with electrostatic discharge protection Download PDFInfo
- Publication number
- CN111987862A CN111987862A CN202010783090.1A CN202010783090A CN111987862A CN 111987862 A CN111987862 A CN 111987862A CN 202010783090 A CN202010783090 A CN 202010783090A CN 111987862 A CN111987862 A CN 111987862A
- Authority
- CN
- China
- Prior art keywords
- circuit board
- motor
- shaft tube
- grounding section
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000011889 copper foil Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005323 electroforming Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The invention relates to a motor with electrostatic discharge protection. The motor with electrostatic discharge protection of the present invention comprises: a base, a shaft tube, a stator set and a rotor set. The shaft tube is arranged on the base. The rotor set is rotatably disposed on the shaft tube. 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. By using the at least one grounding section, the electrostatic arc can be discharged through the at least one grounding section, the electrostatic arc can not damage the at least one electronic element and the circuit of the circuit board, the motor can normally run, and the electrostatic discharge protection capability is improved.
Description
The invention relates to a divisional application of an invention patent application with the application number of 201610635453.0 and the name of 'a motor with electrostatic discharge protection', which is filed on 2016, 08, 05.
Technical Field
The invention relates to a motor with electrostatic discharge protection.
Background
Existing motors include a circuit board to control the operation of the motor. When part of the surface of the circuit board of the motor is exposed to the outside, static electricity easily generates electric arcs to the circuit board of the motor, and the problems that electronic components of the circuit board are damaged and the motor cannot run are caused.
Disclosure of Invention
The invention provides a motor with electrostatic discharge protection. In one embodiment, the motor with electrostatic discharge protection of the present invention comprises: a base, a shaft tube, a stator set and a rotor set. The shaft tube is arranged on the base. The rotor set is rotatably disposed on the shaft tube. 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; 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 on the second surface at the position opposite to the at least one breakpoint.
By using the at least one grounding section, the electrostatic arc can be discharged through the at least one grounding section, the electrostatic arc can not damage the at least one electronic element and the circuit of the circuit board, the motor can normally run, and the electrostatic discharge protection capability is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of an electric machine with ESD protection in accordance with the present invention;
FIG. 2 is a schematic diagram of a first side of one embodiment of a circuit board of the motor of the present invention;
FIG. 3 is a schematic diagram of a second side of a circuit board of the motor according to one embodiment of the present invention;
FIG. 4 is a schematic diagram of a first side of an embodiment of a circuit board of the motor of the present invention;
FIG. 5 is a schematic cross-sectional view of an embodiment of an electric machine with ESD protection in accordance with the present invention; and
FIG. 6 is a cross-sectional view of an electrical machine with ESD protection according to an embodiment of the present invention.
Description of the symbols of the drawings:
10 electric machine with electrostatic discharge protection
11 base
12 axle tube
13 stator group
14 rotor set
15 circuit board
25 circuit board
30 electric machine with electrostatic discharge protection
35 circuit board
40 electric machine with electrostatic discharge protection
41 base
42 shaft tube
43 stator group
44 rotor set
45 circuit board
111 circular wall
123 bearing
132 winding sleeve
133 coil
134 magnetic conducting plate
141 motor casing
142 center axis
143 permanent magnet
151 electronic component
152 ground segment
153 first side
154 second side
156 breakpoint
253 first side
252. 257, 258 ground segment
261. 262 breakpoint
351 electronic element
352 ground section
353 first face
354 second side
423 bearing
441 motor case
442 center axis
443 permanent magnet
451 electronic element
452 ground segment
453 first side
454 second side
455 coil
Detailed Description
FIG. 1 is a cross-sectional view of an embodiment of an electrical machine with ESD protection according to the present invention. Fig. 2 shows a schematic view of a first side of an embodiment of a circuit board of the motor of the present invention. Fig. 3 is a schematic diagram of a second side of a circuit board of the motor according to an embodiment of the present invention. Referring to fig. 1 to 3, the motor 10 with esd protection of the present invention can be applied to a fan. The motor 10 with electrostatic discharge protection of the present invention comprises: a base 11, a shaft 12, a stator set 13 and a rotor set 14.
The shaft tube 12 is disposed on the base 11. In one embodiment, at least one bearing 123 is disposed in the shaft tube 12, and the at least one bearing 123 has a shaft hole. The stator assembly 13 is disposed on the outer circumference of the shaft tube 12. The stator assembly 13 includes a winding sleeve 132, a coil 133 and at least one magnetic conductive plate 134. The coil 133 is wound around the winding sleeve 132, and the at least one magnetic conductive plate 134 is combined with the winding sleeve 132. In one embodiment, the at least one magnetic conductive member 134 may be a silicon steel plate or other magnetic conductive element.
The rotor set 14 is rotatably disposed on the shaft tube 12. The rotor assembly 14 has a motor case 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 case 141.
The stator assembly 13 includes a circuit board 15, and the circuit board 15 is disposed on the outer periphery of the shaft tube 12 and 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 segment 152, and the at least one grounding segment 152 is disposed around the at least one electronic component 151. The at least one grounding segment 152 is a conductive segment, and in one embodiment, the at least one grounding segment 152 is a copper foil or other conductive material. 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 without damaging the at least one electronic component 151 and the circuit of the circuit board 15, so that the motor can operate normally, and the electrostatic discharge protection capability is improved.
The circuit board 15 further includes a first surface 153 and a second surface 154, and the at least one grounding segment 152 is disposed on at least one of the first surface 153 and the second surface 154. In one embodiment, the at least one grounding 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 circular wall 111, a portion of the circuit board 15 is disposed in the circular wall 111, the first side 153 of the circuit board 15 is exposed outside a top portion of the circular wall 111, and the second side 154 of the circuit board 15 is under the top portion of the circular wall 111, i.e., the second side 154 of the circuit board 15 is hidden in the circular wall 111. Therefore, the second surface 154 of the circuit board 15 is not damaged by the electrostatic discharge, and the at least one grounding segment 152 is 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, 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 at an outer peripheral edge of the first surface 153 of the circuit board 15, so that when an electrostatic arc is generated, the electrostatic arc contacts the at least one grounding section 152 first and discharges through the at least one grounding section 152, and thus the electrostatic arc does not contact the at least one electronic component 151 and the circuit of the circuit board 15 and does not damage the at least one electronic component 151 and the circuit of the circuit board 15. The at least one ground segment 152 is electrically connected to a negative power terminal, which can be a ground terminal. The negative power supply electrode can be disposed on the second surface 154 of the circuit board 15, and the at least one grounding segment 152 of the first surface 153 can be electrically connected to the negative power supply electrode of the second surface 154 by a via.
In one embodiment, the at least one grounding segment 152 of the first surface 153 of the circuit board 15 has at least one disconnection point 156, and no electronic component or solder joint is disposed on the second surface 154 at a position opposite to the at least one disconnection point 156. In the embodiment of fig. 2, the at least one ground segment 152 of the first side 153 of the circuit board 15 has a disconnection point 156.
Referring to fig. 4, a schematic diagram of a first side of an embodiment of a circuit board of the motor of the present invention is shown. The first surface 253 of the circuit board 25 has a plurality of grounding sections 252, 257, 258, and a plurality of disconnection points 261, 262 are formed between the grounding sections 252, 257, 258.
Referring to fig. 5, a cross-sectional view of an embodiment of the motor with esd protection of the present invention is shown. Like elements in the embodiment of FIG. 5 are numbered the same as compared to the embodiment of FIG. 1. Fig. 1 and 5 show radial air gap machines. The motor 30 with electrostatic discharge protection of the present invention comprises: a base 11, a shaft 12, a stator set 13 and a rotor set 14.
The stator assembly 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 from the top of the annular wall 111, and the at least one grounding segment 352 is disposed on the first surface 353 and the second surface 354 of the circuit board 35, that is, the first surface 353 and the second surface 354 both have the at least one grounding segment 352. Since the first surface 353 and the second surface 354 of the circuit board 35 are exposed outside the top portion of the annular wall 111, both the first surface 353 and the second surface 354 of the circuit board 35 may be damaged by the electrostatic discharge, and therefore the at least one grounding section 352 is disposed on both the first surface 353 and the second surface 354 of the circuit board 35, so that the at least one electronic component 351 and the circuit of the first surface 353 and the second surface 354 of the circuit board 35 are not damaged by the electrostatic discharge.
Referring to fig. 6, a cross-sectional view of an embodiment of the motor with esd protection of the present invention is shown. Fig. 6 shows an axial air gap machine. The motor with electrostatic discharge protection 40 of the present invention comprises: a base 41, a shaft tube 42, a stator set 43 and a rotor set 44. The axle tube 42 is disposed on the base 41. In one embodiment, the shaft tube 42 is integrally formed with the base 41. At least one bearing 423 is disposed in the shaft tube 42, and the at least one bearing 423 has a shaft hole.
The rotor set 44 is rotatably disposed on the shaft tube 42. The rotor set 44 has a motor housing 441, a center 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 housing 441 and axially faces the stator assembly 43.
The stator set 43 is disposed on the outer circumference of the shaft tube 42. The stator pack 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 component 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, axially opposite to the permanent magnet 443. The at least one coil 455 may be wound and disposed on the first surface 453 of the circuit board 45, or the at least one coil 455 may be formed on the first surface 453 of the circuit board 45 by an electroforming or etching process, for example: and printing the coil. 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 side 453 and the second side 454 of the circuit board 45 are exposed out of the base 41, and the at least one grounding section 452 is disposed on the first side 453 and the second side 454 of the circuit board 45, that is, the first side 453 and the second side 454 have the at least one grounding section 452. The at least one grounding section 452 is disposed at the peripheral edge of the first surface 453 and the second surface 454 of the circuit board 45, so that the at least one coil 455, the at least one electronic component 451, and the circuit of the first surface 453 and the second surface 454 of the circuit board 45 are not damaged by the esd.
The experimental results show that the conventional circuit board without the at least one grounding section can cause the damage of the electronic components in the conventional circuit board when the static electricity reaches 10KV in the esd test. By using the motor with electrostatic discharge protection, in an electrostatic discharge test, when the static reaches 15KV, the electronic elements in the circuit board can not be damaged, and the electrostatic discharge protection capability is greatly improved.
The above embodiments are merely illustrative of the principles and effects of the present invention, and do not limit the present invention. Modifications and variations of the above-described embodiments may be made by those skilled in the art without departing from the spirit of the invention. The scope of the claims of the present invention should be determined by reference to the appended 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.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105118825A TWI606674B (en) | 2016-06-15 | 2016-06-15 | Electrostatic discharge protection motor |
| TW105118825 | 2016-06-15 | ||
| CN201610635453.0A CN107516976A (en) | 2016-06-15 | 2016-08-05 | Electric machine with electrostatic discharge protection |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610635453.0A Division CN107516976A (en) | 2016-06-15 | 2016-08-05 | Electric machine with electrostatic discharge protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111987862A true CN111987862A (en) | 2020-11-24 |
Family
ID=60721536
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610635453.0A Pending CN107516976A (en) | 2016-06-15 | 2016-08-05 | Electric machine with electrostatic discharge protection |
| CN202010783090.1A Pending CN111987862A (en) | 2016-06-15 | 2016-08-05 | Electric machine with electrostatic discharge protection |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610635453.0A Pending CN107516976A (en) | 2016-06-15 | 2016-08-05 | Electric machine with electrostatic discharge protection |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN107516976A (en) |
| TW (1) | TWI606674B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI690135B (en) * | 2018-04-09 | 2020-04-01 | 建準電機工業股份有限公司 | Motor and electromagnetic interference protection device for motor |
| WO2021212471A1 (en) * | 2020-04-24 | 2021-10-28 | 深圳市大疆创新科技有限公司 | Gimbal motor electro-static protection method, gimbal drive apparatus, and grounding elastic piece thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2544457Y (en) * | 2002-02-04 | 2003-04-09 | 金学高 | Brusbless dc motor |
| CN1522103A (en) * | 2003-02-14 | 2004-08-18 | 盛群半导体股份有限公司 | Electrostatic protection structure on circuit board and method thereof |
| CN201303461Y (en) * | 2008-11-25 | 2009-09-02 | 英业达股份有限公司 | Layout structure for preventing electrostatic discharge and electromagnetic interference |
| CN204517613U (en) * | 2015-02-11 | 2015-07-29 | 建准电机工业股份有限公司 | External rotor motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100544542C (en) * | 2004-12-09 | 2009-09-23 | 鸿富锦精密工业（深圳）有限公司 | Prevent the printed circuit board (PCB) of static discharge |
| CN201444722U (en) * | 2009-03-18 | 2010-04-28 | 群光电子股份有限公司 | Circuit board structure |
| CN202772736U (en) * | 2012-09-13 | 2013-03-06 | 奇鋐科技股份有限公司 | Motor protection structure |
| CN103152975B (en) * | 2013-02-28 | 2016-02-03 | 江苏惠通集团有限责任公司 | The printed circuit board (PCB) of wall surface switch |
| CN204157158U (en) * | 2014-10-22 | 2015-02-11 | 茂丞科技股份有限公司 | There is the electronic installation of electrostatic protection |
-
2016
- 2016-06-15 TW TW105118825A patent/TWI606674B/en active
- 2016-08-05 CN CN201610635453.0A patent/CN107516976A/en active Pending
- 2016-08-05 CN CN202010783090.1A patent/CN111987862A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2544457Y (en) * | 2002-02-04 | 2003-04-09 | 金学高 | Brusbless dc motor |
| CN1522103A (en) * | 2003-02-14 | 2004-08-18 | 盛群半导体股份有限公司 | Electrostatic protection structure on circuit board and method thereof |
| CN201303461Y (en) * | 2008-11-25 | 2009-09-02 | 英业达股份有限公司 | Layout structure for preventing electrostatic discharge and electromagnetic interference |
| CN204517613U (en) * | 2015-02-11 | 2015-07-29 | 建准电机工业股份有限公司 | External rotor motor |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201743542A (en) | 2017-12-16 |
| CN107516976A (en) | 2017-12-26 |
| TWI606674B (en) | 2017-11-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201124 |