CN107437869A - Suppress EMC circuit structure, motor and electrical equipment - Google Patents
Suppress EMC circuit structure, motor and electrical equipment Download PDFInfo
- Publication number
- CN107437869A CN107437869A CN201710917223.8A CN201710917223A CN107437869A CN 107437869 A CN107437869 A CN 107437869A CN 201710917223 A CN201710917223 A CN 201710917223A CN 107437869 A CN107437869 A CN 107437869A
- Authority
- CN
- China
- Prior art keywords
- motor
- emc
- circuit structure
- controller
- capacitance
- 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
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
- H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention discloses a kind of suppression EMC circuit structure, motor and electrical equipment.The circuit structure of the suppression EMC, is arranged in motor, and the motor includes the conductive electric motor end cap of energy, built-in controller and dc source, and the circuit structure of the suppression EMC includes：Set in the controller, the Y capacitance that the first pin is connected with the negative pole of the dc source；First end is connected with the second pin of Y capacitance, the low-impedance conductor that the second end is connected with the electric motor end cap.Technical scheme provided by the invention, it can apply in the less motor of internal idle space is caused because of built-in controller, so as to effectively avoid the motor EMC of built-in controller exceeded.
Description
Technical field
The present invention relates to improve EMC (Electro Magnetic Compatibility, Electro Magnetic Compatibility) technical field,
More particularly to a kind of suppression EMC circuit structure, motor and electrical equipment.
Background technology
EMC refers to that equipment or system meet the requirements operation not to any equipment production in its environment in its electromagnetic environment
The ability of raw intolerable electromagnetic interference.Therefore, EMC includes the requirement of two aspects：On the one hand refer to that equipment is normally being transported
To electromagnetic interference caused by the environment of place no more than certain limit value during row；On the other hand refer to utensil to place environment
Present in electromagnetic interference there is a certain degree of immunity to interference, i.e. electromagnetic susceptibility.
In the prior art, generally by increasing EMC filtering devices, optimizing EMC filtering devices parameter to improve EMC, such as root
Different size magnet ring, X electric capacity or common and differential mode inductor are used according to different frequency sections.
It is this but the size of general EMC suppression devices is larger, is limited by device appearance and size, internal structure of motor
Improvement mode can not be applied in the less motor of internal idle space is caused because of built-in controller, so that built-in controller
Motor EMC is easily exceeded.
The content of the invention
In view of this, the invention provides a kind of suppression EMC circuit structure, motor and electrical equipment, can apply because in
Putting controller causes in the less motor of internal idle space, so as to effectively avoid the motor EMC of built-in controller exceeded.
To achieve the above object, the present invention provides following technical scheme：
A kind of suppression EMC circuit structure, is arranged in motor, and the motor includes electric motor end cap, built-in that can be conductive
Controller and dc source, the circuit structure of the suppression EMC includes：
Set in the controller, the Y capacitance that the first pin is connected with the negative pole of the dc source；
First end is connected with the second pin of Y capacitance, the low-impedance conductor that the second end is connected with the electric motor end cap.
Further, provided after the just extremely described controller rectification alternating current of the dc source, or by positioned at described
Outside motor, the mainboard of electrical equipment provide.
Further, the low-impedance conductor includes：
Conducting strip, power line, conductive tape or conductive bar.
Further, the electric motor end cap is metal end.
Further, the Y capacitance is the specifications parameter Y capacitance corresponding with the EMC interfering frequencies of motor.
A kind of motor, including：
Above-mentioned suppression EMC described in any one circuit structure.
Further, the motor includes：
Plastic package brushless direct current motor.
A kind of electrical equipment, including：
Above-mentioned motor described in any one.
Further, the electrical equipment includes：
Air-conditioning.
Understand that compared with prior art, the invention provides a kind of suppression EMC circuit knot via above-mentioned technical scheme
Structure, motor and electrical equipment.Using suppression EMC provided by the invention circuit structure, the EMC interference signals of controller flow to direct current
During source negative pole (i.e. the reference ground of dc source), by Y capacitance, low-impedance conductor and electric motor end cap, provided for such EMC interference
One low-impedance path.When EMC interference signals flow to DC power cathode (i.e. the reference ground of dc source) path, with Y
The suitable EMC interference signals of capacitor resonance frequency can pass through Y capacitance, low-impedance conductor flow direction motor end cap substantially.Due to motor
There is parasitic capacitance in end cap, flow direction motor end cap with controller, the power device of controller, machine winding, motor plastic package material
EMC interference signals are returned to the controller of motor by parasitic capacitance, so as to avoid the control of EMC interference signal outflow motors
Device processed, while the loop flowing that EMC interference signals are formed in Y capacitance, low-impedance conductor, electric motor end cap, parasitic capacitance, controller
In be gradually consumed in the form of heating, so as to avoid motor EMC interference it is exceeded.Suppression EMC provided by the invention electricity
Line structure, it is only necessary to increase Y capacitance in the controller of motor, and increase low-impedance conductor in motor to connect Y capacitance
And electric motor end cap, the space very little of the two shared motor internal.Therefore, using suppression EMC provided by the invention circuit knot
Structure, it can apply in the less motor of internal idle space is caused because of built-in controller, so as to effectively avoid built-in controller
Motor EMC it is exceeded.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of structure chart of suppression EMC circuit structure provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Mode is applied to be described in further detail prior art and the present invention.
Embodiment
Referring to Fig. 1, Fig. 1 is a kind of structure chart of suppression EMC circuit structure provided in an embodiment of the present invention.
As shown in figure 1, suppression EMC provided in an embodiment of the present invention circuit structure is arranged in motor, the motor bag
The conductive electric motor end cap 1 of energy, built-in controller 2 and dc source 3 are included, wherein, suppression EMC's provided in an embodiment of the present invention
Circuit structure, including：
It is arranged in the controller 2, the Y capacitance 4 that the first pin is connected with the negative pole of the dc source 3；
First end is connected with the second pin of Y capacitance 4, and the Low ESR that the second end is connected with the electric motor end cap 1 is led
Body 5.
Optionally, provided after the just extremely described controller rectification alternating current of the dc source, or, by positioned at described
Outside motor, the mainboard of electrical equipment provide, such as by being provided positioned at the mainboard of outside motor, air-conditioning.
Optionally, the low-impedance conductor includes：
Conducting strip, power line, conductive tape or conductive bar etc., the present invention this is not limited, as long as space-consuming compared with
Small low-impedance conductor can use.
Optionally, the electric motor end cap is metal end.
Optionally, the motor can be plastic package brushless direct current motor, and no ground wire, plastic package brushless direct current motor both ends have
Metal end.
Optionally, the Y capacitance is the specifications parameter Y capacitance corresponding with the EMC interfering frequencies of motor, so that EMC
Interference signal is more easily by Y capacitance.Optionally, the specifications parameter of the Y capacitance is corresponding with the EMC interfering frequencies of motor,
Refer to that the resonance dot frequency of the Y capacitance is close or equal with the EMC interfering frequencies of motor.Wherein, the capacity of Y capacitance determines
Its resonance dot frequency.Optionally, Y electricity of the range of capacity in the range of 100pF (pico farad) to 10000pF (pico farad) can be selected
Hold, such as Y capacitance of 1000pF, 2200pF, 4700pF or 10000pF regular size.
Optionally, being connected between power cathode, Y capacitance and low-impedance conductor can be weldingly fixed on by pcb board circuit
On pcb board, it can also be realized by wire jumper or other connected modes；Low-impedance conductor is connected with end cap to be designed by interference
(connection) or riveting, compression casting connection, one can also be formed by certain form processing and end cap, such as welding or dispensing are consolidated
It is fixed.
When electrical power is started working, machine winding current or voltage signal are to straight by switching device by certain algorithm
Stream power supply, which is modulated, to be formed.High dV/dt, di/dt are produced in the pipe course of work is switched, causes the EMC of controller to disturb
Signal.
Using suppression EMC provided in an embodiment of the present invention circuit structure, the EMC interference signals of controller flow to direct current
During source negative pole (i.e. the reference ground of dc source), by Y capacitance, low-impedance conductor and electric motor end cap, provided for such EMC interference
One low-impedance path.When EMC interference signals flow to DC power cathode (i.e. the reference ground of dc source) path, with Y
The suitable EMC interference signals of capacitor resonance frequency can pass through Y capacitance, low-impedance conductor flow direction motor end cap substantially.Due to motor
There is parasitic capacitance in end cap, flow direction motor end cap with controller, the power device of controller, machine winding, motor plastic package material
EMC interference signals are returned to the controller of motor by parasitic capacitance, so as to avoid the control of EMC interference signal outflow motors
Device processed, while the loop flowing that EMC interference signals are formed in Y capacitance, low-impedance conductor, electric motor end cap, parasitic capacitance, controller
In be gradually consumed in the form of heating, so as to avoid motor EMC interference it is exceeded.
Also, suppression EMC provided in an embodiment of the present invention circuit structure, it is only necessary to increase Y in the controller of motor
Electric capacity, and increase low-impedance conductor in motor to connect Y capacitance and electric motor end cap, the space of the two shared motor internal
Very little.
Therefore, using suppression EMC provided in an embodiment of the present invention circuit structure, can apply because built-in controller is led
Cause in the less motor of internal idle space, so as to effectively avoid the motor EMC of built-in controller exceeded.
In addition, using suppression EMC provided in an embodiment of the present invention circuit structure, EMC interference signals can be blocked from electricity
Source line passes, i.e. realizes from source and EMC is effectively suppressed, EMC inhibitions are more preferable, so as to significantly change
Kind motor EMC, improves (electrical equipment for including motor) product overall performance, additionally it is possible to be advantageous to improve motor and (motor pair
The electrical equipment answered) matching degree of mainboard, so as to reduce electrical equipment complete machine EMC rectification difficulty, shortens the complete machine construction cycle.
In addition, the circuit structure using suppression EMC provided in an embodiment of the present invention, it is not necessary to use expensive EMC wave filters
Part, so as to effectively save cost.
Further, the embodiment of the present invention also provides a kind of motor, and the motor includes any one suppression described above
EMC circuit structure.
Optionally, the motor includes：
Plastic package brushless direct current motor.
Further, the embodiment of the present invention also provides a kind of electrical equipment, and the electrical equipment includes any one motor described above.
Optionally, the electrical equipment is air-conditioning, including domestic air conditioning, business air conditioner etc..It is it is, of course, understood that described
Electrical equipment can also be known other kinds of electrical equipment, and the present embodiment repeats no more.
Understand that compared with prior art, the invention provides a kind of suppression EMC circuit knot via above-mentioned technical scheme
Structure, motor and electrical equipment.Using suppression EMC provided by the invention circuit structure, the EMC interference signals of controller flow to direct current
During source negative pole (i.e. the reference ground of dc source), by Y capacitance, low-impedance conductor and electric motor end cap, provided for such EMC interference
One low-impedance path.When EMC interference signals flow to DC power cathode (i.e. the reference ground of dc source) path, with Y
The suitable EMC interference signals of capacitor resonance frequency can pass through Y capacitance, low-impedance conductor flow direction motor end cap substantially.Due to motor
There is parasitic capacitance in end cap, flow direction motor end cap with controller, the power device of controller, machine winding, motor plastic package material
EMC interference signals are returned to the controller of motor by parasitic capacitance, so as to avoid the control of EMC interference signal outflow motors
Device processed, while the loop flowing that EMC interference signals are formed in Y capacitance, low-impedance conductor, electric motor end cap, parasitic capacitance, controller
In be gradually consumed in the form of heating, so as to avoid motor EMC interference it is exceeded.Suppression EMC provided by the invention electricity
Line structure, it is only necessary to increase Y capacitance in the controller of motor, and increase low-impedance conductor in motor to connect Y capacitance
And electric motor end cap, the space very little of the two shared motor internal.Therefore, using suppression EMC provided by the invention circuit knot
Structure, it can apply in the less motor of internal idle space is caused because of built-in controller, so as to effectively avoid built-in controller
Motor EMC it is exceeded.
In addition, using suppression EMC provided in an embodiment of the present invention circuit structure, EMC interference signals can be blocked from electricity
Source line passes, i.e. realizes from source and EMC is effectively suppressed, EMC inhibitions are more preferable, so as to significantly change
Kind motor EMC, improves (electrical equipment for including motor) product overall performance, additionally it is possible to be advantageous to improve motor and (motor pair
The electrical equipment answered) matching degree of mainboard, so as to reduce electrical equipment complete machine EMC rectification difficulty, shortens the complete machine construction cycle.
In addition, the circuit structure using suppression EMC provided in an embodiment of the present invention, it is not necessary to use expensive EMC wave filters
Part, so as to effectively save cost.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of elements not only include that
A little key elements, but also the other element including being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except other identical element in the process including the key element, method, article or equipment being also present.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (9)
1. a kind of suppression EMC circuit structure, is arranged in motor, it is characterised in that the motor includes motor that can be conductive
End cap, built-in controller and dc source, the circuit structure of the suppression EMC include：
Set in the controller, the Y capacitance that the first pin is connected with the negative pole of the dc source；
First end is connected with the second pin of Y capacitance, the low-impedance conductor that the second end is connected with the electric motor end cap.
2. suppression EMC according to claim 1 circuit structure, it is characterised in that the just extremely institute of the dc source
There is provided after stating controller rectification alternating current, or by the mainboard offer positioned at the outside motor, electrical equipment.
3. suppression EMC according to claim 1 circuit structure, it is characterised in that the low-impedance conductor includes：
Conducting strip, power line, conductive tape or conductive bar.
4. suppression EMC according to claim 1 circuit structure, it is characterised in that the electric motor end cap is metal end.
5. suppression EMC according to claim 1 circuit structure, it is characterised in that the Y capacitance is specifications parameter and electricity
The corresponding Y capacitance of the EMC interfering frequencies of machine.
A kind of 6. motor, it is characterised in that including：
The circuit structure of suppression EMC described in any one of Claims 1 to 5.
7. motor according to claim 6, it is characterised in that the motor includes：
Plastic package brushless direct current motor.
A kind of 8. electrical equipment, it is characterised in that including：
Motor described in claim 6 or 7.
9. electrical equipment according to claim 8, it is characterised in that the electrical equipment includes：
Air-conditioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710917223.8A CN107437869A (en) | 2017-09-30 | 2017-09-30 | Suppress EMC circuit structure, motor and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710917223.8A CN107437869A (en) | 2017-09-30 | 2017-09-30 | Suppress EMC circuit structure, motor and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107437869A true CN107437869A (en) | 2017-12-05 |
Family
ID=60461959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710917223.8A Pending CN107437869A (en) | 2017-09-30 | 2017-09-30 | Suppress EMC circuit structure, motor and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107437869A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111200342A (en) * | 2018-11-19 | 2020-05-26 | 广东美的白色家电技术创新中心有限公司 | System for restraining electromagnetic interference of direct current motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7019425B2 (en) * | 2003-07-23 | 2006-03-28 | Sintertechnik Gmbh | Device for noise suppressing of small electric motors |
| JP2011250545A (en) * | 2010-05-25 | 2011-12-08 | Mitsubishi Electric Corp | Dc motor and fan |
| CN104716773A (en) * | 2013-12-11 | 2015-06-17 | Lg伊诺特有限公司 | Motor |
| CN206226219U (en) * | 2016-11-17 | 2017-06-06 | 刘粤闽 | A kind of direct current micromotor with EMC filter bands |
-
2017
- 2017-09-30 CN CN201710917223.8A patent/CN107437869A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7019425B2 (en) * | 2003-07-23 | 2006-03-28 | Sintertechnik Gmbh | Device for noise suppressing of small electric motors |
| JP2011250545A (en) * | 2010-05-25 | 2011-12-08 | Mitsubishi Electric Corp | Dc motor and fan |
| CN104716773A (en) * | 2013-12-11 | 2015-06-17 | Lg伊诺特有限公司 | Motor |
| CN206226219U (en) * | 2016-11-17 | 2017-06-06 | 刘粤闽 | A kind of direct current micromotor with EMC filter bands |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111200342A (en) * | 2018-11-19 | 2020-05-26 | 广东美的白色家电技术创新中心有限公司 | System for restraining electromagnetic interference of direct current motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9571058B2 (en) | Drive output harmonic mitigation devices and methods of use thereof | |
| CN106655528A (en) | ECPT (Electric-field Coupled Power Transfer) system based on bilateral LC networks and parameter designing method thereof | |
| CN101651408A (en) | Filtering module inhibiting common mode noise and differential mode noise | |
| CN206743047U (en) | The electromagnetic interference suppression circuit of frequency-changeable compressor in air conditioner and air conditioner | |
| US11601047B2 (en) | Electrical control assembly and electrical device | |
| CN203554276U (en) | Output filter circuit of sine wave vehicular inverter, and sine wave vehicular inverter | |
| CN111490638B (en) | Electric control assembly and electrical equipment | |
| CN107437869A (en) | Suppress EMC circuit structure, motor and electrical equipment | |
| CN101860193B (en) | Power factor correction circuit | |
| CN209516921U (en) | The common-mode interference suppression circuit of air-conditioning | |
| CN206313657U (en) | EMC filter circuit and electromagnetism stove | |
| CN206149135U (en) | EMC filter circuit and electromagnetism stove | |
| CN106602850B (en) | A kind of power supply ripple suppression circuit and method from coupling | |
| CN204334316U (en) | Reduce the device of switching circuit electromagnetic noise | |
| WO2020103276A1 (en) | System for inhibiting electromagnetic interference of refrigerant radiator and household appliance | |
| CN203933388U (en) | A kind of for suppressing electromagnetic interference filter circuit and the air conditioner of resonance peak | |
| CN208797779U (en) | Electrically-controlled component and electrical equipment | |
| CN208939773U (en) | A kind of circuit structure, motor and electric appliance | |
| CN107878237A (en) | A kind of electric tractor wireless charging device | |
| CN206595891U (en) | Household electrical appliance and its electromagnetic interference suppression circuit | |
| CN207819687U (en) | A kind of motor of automatic elimination pulsating current | |
| CN209516920U (en) | Inhibit the air-conditioning frequency conversion system of common mode interference | |
| CN207416595U (en) | A kind of electric tractor wireless charging device | |
| CN202384923U (en) | DC (direct current) motor filtering circuit | |
| CN202617396U (en) | Induction cooker circuit |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171205 |
|
| RJ01 | Rejection of invention patent application after publication |