CN105092993B - Detect the method and measuring system of power supply adaptor - Google Patents
Detect the method and measuring system of power supply adaptor Download PDFInfo
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- CN105092993B CN105092993B CN201410154846.0A CN201410154846A CN105092993B CN 105092993 B CN105092993 B CN 105092993B CN 201410154846 A CN201410154846 A CN 201410154846A CN 105092993 B CN105092993 B CN 105092993B
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Abstract
The invention discloses a kind of methods and measuring system for detecting power supply adaptor, the method of detection power supply adaptor includes: to acquire the radiofrequency signal of the direct current output port of power supply adaptor, and the radiofrequency signal is for measuring interference of the power supply adaptor to computer telecommunication port.The measuring system of detection power supply adaptor includes: coupling decoupling network, and the end EUT connects the DC output end of power supply adaptor；EMI receiver, rf inputs connect the RF output end of the coupling decoupling network；Fictitious load connects the end AE of the coupling decoupling network；And artificial mains network, connect the ac input end of the power supply adaptor.The present invention can carry out accurate interference voltage measurement to the power supply adaptor of notebook, can predict the test result of telecommunication port of the power supply adapter for notebook computer product when arranging in pairs or groups laptop well.
Description
Technical field
The present invention relates to the electromagnetic interference measurement, EMI measurement technical field of laptop more particularly to a kind of sides of power supply adaptor
Method and measuring system.
Background technique
Present laptop is more more and more universal, gradually instead of the status of desktop personal computer, laptop
Electromagnetic interference problem also increasingly cause to pay close attention to, wherein the Conduction Interference of telecommunication port is exactly one of them.Laptop
Belong to Information Technology Equipment, according to CISPR22:2008 to the radio interference limit value of Information Technology Equipment and wanting for measurement method
It asks, to measure the Conduction Interference of telecommunication port, and measurement result will be lower than limit value as defined in CISPR22:2008.But it is existing
The interference voltage of notebook telecommunication port is tested, since laptop and notebook host are not usually that the same manufacturer is raw
It produces, power supply adaptor can not usually obtain the laptop of respective model early period in product development, often in development late stage
It is real just to cause that telecommunication port interference is exceeded to be tested to the power supply adaptor of notebook with Qualify Phase, it can be to the market of product
Importing will cause greatly to impact, therefore the manufacturer of power supply adaptor needs a kind of test method to be used to assess DC output end
It is exceeded whether mouth can cause telecommunication port.
Summary of the invention
The purpose of the present invention is to provide a kind of methods and measuring system for detecting power supply adaptor, to suitable to power supply
The DC output end mouth interference voltage of orchestration measures, and avoids development late stage from matching Qualify Phase in fact and just finds that power supply adaptor draws
It is exceeded to send out telecommunication port interference, causes the problem of the production cost increases.
The invention discloses a kind of methods for detecting power supply adaptor, wherein the direct current including acquiring power supply adaptor is defeated
The radiofrequency signal of exit port, the radiofrequency signal is for measuring interference of the power supply adaptor to computer telecommunication port.
An embodiment of the method for power supply adaptor is detected according to the present invention, wherein the radiofrequency signal is being measured
It is preceding to pass through calibration and compensation.
An embodiment of the method for power supply adaptor is detected according to the present invention, wherein the method, which is in, simulates the electricity
Source adapter connect with computer and carries out in normal operative condition.
An embodiment of the method for power supply adaptor is detected according to the present invention, wherein including: will using coupling decoupling network
The DC output end radiofrequency signal of the power supply adaptor is coupled；It is received using EMI receiver and decouples net through the coupling
Radiofrequency signal after network coupling；The power supply adaptor is set to be in simulation working condition using fictitious load；Use artificial power supply
Network is powered to the power supply adaptor.
The present invention is a kind of for implementing the measuring system of the method for above-mentioned detection power supply adaptor, wherein includes: that coupling is gone
Coupling network, the end EUT connect the DC output end of power supply adaptor；EMI receiver, rf inputs connect coupling decoupling
The RF output end of network；Fictitious load connects the end AE of the coupling decoupling network；And artificial mains network, connect the electricity
The ac input end of source adapter.
An embodiment of measuring system according to the present invention, wherein the end AE of the coupling decoupling network has internal decoupling electricity
Road, the interference of the fictitious load is isolated.
An embodiment of measuring system according to the present invention, wherein the EMI receiver includes the quasi-peak detector and average value
Wave detector.
An embodiment of measuring system according to the present invention, wherein the artificial mains network is V-type artificial mains network.
An embodiment of measuring system according to the present invention, wherein the RF output end of the coupling decoupling network connects with the EMI
It is connected between the rf inputs of receipts machine by a coaxial cable.
An embodiment of measuring system according to the present invention, wherein further include with reference to earth plate, the coupling decoupling network, mould
Quasi- load, artificial mains network and the power supply adaptor are arranged in this with reference on earth plate.
An embodiment of measuring system according to the present invention, wherein the coupling decoupling network, the fictitious load, the artificial electricity
Source network and the power supply adaptor are greater than etc. at the Edge Distance of the projection with reference to the earth plate edge with reference to earth plate
In 0.5m.
An embodiment of measuring system according to the present invention, wherein the power supply adaptor is on insulating stand and is set as away from this
With reference to vertical range 30cm to the 50cm of earth plate, the horizontal distance for exchanging end to the artificial mains network of the power supply adaptor
Horizontal distance for 70cm to 90cm, DC output end to the coupling decoupling network of the power supply adaptor is 70cm to 90cm.
An embodiment of measuring system according to the present invention, wherein the power supply adaptor away from this with reference to earth plate it is vertical away from
From for 40cm, the horizontal distance of exchange end to the artificial mains network of the power supply adaptor are 80cm, the power supply adaptor
The horizontal distance of DC output end to the coupling decoupling network is 80cm.
To sum up, the present invention carries out accurate interference voltage measurement by the power supply adaptor to notebook, can be pre- well
See the test result of telecommunication port of the power supply adapter for notebook computer product when arranging in pairs or groups laptop, it is suitable in power supply in this way
Voltage measuring value can be disturbed according to DC output end dry in the case where no laptop during orchestration research and development of products
Predict whether telecommunication port measured value meets the requirements of the standard, if not meeting standard requirements can reach by applying Improving Measurements
To standard requirements, its later period is enable to be up to standard smoothly when measuring telecommunication port.
Detailed description of the invention
Fig. 1 show the structural schematic diagram of the measuring system of detection power supply adaptor；
Fig. 2~Fig. 4 is respectively the telecommunication port conduction interference of three laptops and the direct current output of power supply adaptor
The experiment curv figure of port.
Specific embodiment
Present inventor has found telecommunication port in the telecommunication port Conduction Interference of actual measurement laptop
The AC/DC power supply adaptor that Conduction Interference and laptop are arranged in pairs or groups has much relations, and the power supply adaptor for arranging in pairs or groups different is surveyed
Difference is very big sometimes for test result.The electricity of power supply adaptor is found by the principle analysis to notebook telecommunication port Conduction Interference
Magnetic disturbance signal can be delivered to the telecommunication port of notebook by the DC output end oral instructions of adapter, become and cause notebook electric
Believe the underproof key factor of port test.Therefore the application especially have developed a kind of power supply adaptor DC output end oral instructions lead it is dry
Disturb voltage measurement system and method.
According to the method for above-mentioned analysis detection power supply adaptor of the invention, the DC output end of power supply adaptor is acquired
The radiofrequency signal of mouth, and radiofrequency signal is the interference for measuring power supply adaptor to computer telecommunication port.Further to
It says, for more accurately the radiofrequency signal of the direct current output port of power supply adaptor is acquired and is analyzed, needs in radio frequency
Signal is calibrated and is compensated before being measured.
Fig. 1 show the structure chart of the measuring system of the method for detection power supply adaptor, further illustrates as shown in connection with fig. 1
The measuring system of the method for power supply adaptor is detected, interference voltage measuring system packet is led in power supply adaptor DC output end oral instructions
Include: coupling decoupling network 4(Coupling Decoupling Network), fictitious load 5, artificial mains network 1(Line
Impedance Stabilization Network) and EMI receiver 3.
With reference to Fig. 1, measuring system includes: that artificial mains network 1 connect power adaptation with the connection structure of power supply adaptor 2
The ac input end of device 2, to provide electric power to power supply adaptor 2.The DC output end connection coupling decoupling net of power supply adaptor 2
The end EUT of network 4, the rf inputs of the RF output end connection EMI receiver 3 of coupling decoupling network 4, couples decoupling network 4
The end AE connect fictitious load 5.Coupling decoupling network 4 couples the DC output end radiofrequency signal of power supply adaptor 2.
The working principle of interference voltage measuring system is led below with reference to Fig. 1 summary power supply adaptor DC output end oral instructions,
Artificial mains network 1 provides AC power source, load of the fictitious load 5 as simulation laptop, one to power supply adaptor 2
As for simulation notebook power consumption load.The end EUT of the DC output end connection coupling decoupling network 4 of power supply adaptor 2, coupling
The end AE of decoupling network 4 connects fictitious load 5.The radio frequency for coupling the RF output end connection EMI receiver 3 of decoupling network 4 is defeated
Enter end.The level for the interference signal that the measurement coupling decoupling network 4 of EMI receiver 3 is coupled out.In general, EMI receiver 3
It should include the quasi-peak detector and average reading detector, to be respectively used for measuring the quasi-peak value and average value of interference signal.Into one
Step, the end AE of coupling decoupling network 4 has internal decoupling circuit, the interference of the generation of fictitious load 5 is isolated.Coupling decoupling net
The earth impedance of network 4 is 150 Ω, and it is steady to measure impedance used in the telecommunication port of laptop measurement with artificial mains network
The common mode interference signal earth impedance for determining network is identical.The RF output port of artificial mains network 1 terminates the impedance of 50 Ω.
For an embodiment, artificial mains network can select V-type artificial mains network.
For the accuracy for guaranteeing test, measuring system should simulate the power supply adaptor and connect with computer and in normal work
Make to be tested in situation.Specifically arrangement includes:
With further reference to Fig. 1, entire measuring system is arranged on 6 on a reference earth plate, in entire measuring system
The edge of the projecting edge distance reference ground connection plate 6 of each equipment at least should be 0.5m.In order to guarantee the direct current of power supply adaptor 2
Interference level of the output port Conduction Interference measurement result as far as possible with direct current output port when practical collocation laptop
It is close, the direct current output port measurement of power supply adaptor 2 arrange introduced common mode environment need as far as possible with telecommunication port
Common mode environment in measurement arrangement is close, therefore referring to the method for arranging of telecommunication port in CISPR22:2008 standard, design is straight
Output port test arrangement is flowed, as shown in Figure 1, power supply adaptor 2 is placed on the non-conductive desk 7 of 40cm high, artificial power supply
Network 1, which is fixed on, keeps good earth with reference on ground connection plate 6.The ac input end of power supply adaptor 2 is to artificial mains network 1
Horizontal distance be 80cm, redundance can be bundled into 8 words if length is more than 80cm by the power supply line of power supply adaptor 2
The harness of shape.The direct current output of power supply adaptor 2 terminates to the port EUT of coupling decoupling network 4；Coupling decoupling network 4 is penetrated
Frequency output end can be connected to the rf inputs of EMI receiver 3 by the coaxial cable 10 of 50 Ω；Couple decoupling network 4
AE terminates fictitious load 5；Coupling decoupling network 4 is fixed on reference on earth plate 6, and keeps good earth.Power supply adaptor 2
The horizontal distance of direct current output port to coupling decoupling network 4 is 80cm, if the direct current output line length of power supply adaptor 2 is super
It crosses 80cm and is then bundled into 8-shaped harness.
Certainly, above-mentioned distance values are only preferable example, and are not immobilized.Actually those skilled in the art
Above-mentioned distance values can also slightly be adjusted, maintain it in a certain range, for example, power supply adaptor 2 is to reference
The vertical range of earth plate 6 is between 30cm to 50cm, the water of the ac input end of power supply adaptor 2 to artificial mains network 1
For flat distance between 70cm to 90cm, the horizontal distance of DC output end to the coupling decoupling network 4 of power supply adaptor 2 is 70cm
To between 90cm.
In order to verify detection power supply adaptor method prediction validity that telecommunication port conduction interference is influenced, can be with
It takes 3 power supply adaptors as sample, is first arranged in pairs or groups respectively respective laptop with the telecommunication port measurement method of notebook,
And being total to for power supply adaptor 150kHz~30MHz is measured respectively with the method laptop of not arranging in pairs or groups of detection power supply adaptor
Mould disturbance voltage, Fig. 2~Fig. 4 be respectively three laptops telecommunication port conduction interference and power supply adaptor direct current it is defeated
The experiment curv figure of exit port, the A in Fig. 2~Fig. 4 represent the measurement result curve of telecommunication port, and B represents direct current output port
Measurement result curve, the available following result of comparison from Fig. 2~Fig. 4: (1) among 150KHz~5MHzs, measurement
Obtained direct current output port common mode disturbance voltage is all larger than telecommunication port common mode disturbance voltage value, and the measurement of two methods
The trend of curve is very consistent with shape；(2) there are some narrowband harassing and wrecking signals, amplitude in the result that telecommunication port measures
Higher than the measured value of direct current output port, it is that laptop itself generates that signal is harassed in these narrowbands, with power adaptation
Device is not related.
The method that result can be seen that detection power supply adaptor from above can be used for predicting that telecommunication port common mode is disturbed
The accordance disturbed.As long as the measured value of the direct current output port obtained with the method for detection power supply adaptor is passed less than telecommunication port
The limit value requirement of harassing and wrecking is led, then also the same when later period power supply adaptor arranges in pairs or groups upper laptop progress telecommunication port measurement
It is able to satisfy the requirement of telecommunication port measurement limit value., whereas if the conduction interference of direct current output port exceeds the biography of telecommunication port
Leading limit of disturbance, then this power supply adaptor collocation laptop is that be likely to result in telecommunication port conducted emission test unqualified.
The method of detection power supply adaptor can be effectively predicted the manufacturer of power supply adaptor and have practical value.
To sum up, the present invention carries out accurate interference voltage measurement by the power supply adaptor to notebook, can be pre- well
See the test result of telecommunication port of the power supply adapter for notebook computer product when arranging in pairs or groups laptop, it is suitable in power supply in this way
Voltage measuring value can be disturbed according to DC output end dry in the case where no laptop during orchestration research and development of products
Predict whether telecommunication port measured value meets the requirements of the standard, if not meeting standard requirements can reach by applying Improving Measurements
To standard requirements, its later period is enable to be up to standard smoothly when measuring telecommunication port.
Technical solution of the present invention has been disclosed by preferred embodiment as above.Artisan will appreciate that not taking off
It changes and retouches made by the case where from the revealed scope and spirit of the present invention of appended claims of the invention, belongs to
Within scope of protection of the claims of the invention.
Claims (11)
1. a kind of method for detecting power supply adaptor characterized by comprising
The radiofrequency signal of the direct current output port of power supply adaptor is acquired, the radiofrequency signal is for measuring the power supply adaptor
Interference to computer telecommunication port, and the method is connect with computer and normal work in simulating the power supply adaptor
Make to carry out in situation；
The DC output end radiofrequency signal of the power supply adaptor is coupled using coupling decoupling network；
The radiofrequency signal after the coupling decoupling network coupling is received using EMI receiver；
The power supply adaptor is set to be in simulation working condition using fictitious load；And
It is powered using artificial mains network to the power supply adaptor.
2. the method as described in claim 1, which is characterized in that the radiofrequency signal by calibration and is mended before being measured
It repays.
3. a kind of measuring system for implementing such as any one of claims 1 to 2 the method characterized by comprising
Decoupling network is coupled, the end EUT connects the DC output end of power supply adaptor；
EMI receiver, rf inputs connect the RF output end of the coupling decoupling network；
Fictitious load connects the end AE of the coupling decoupling network；And
Artificial mains network connects the ac input end of the power supply adaptor.
4. measuring system as claimed in claim 3, which is characterized in that the end AE of the coupling decoupling network has internal decoupling electricity
Road, the interference of the fictitious load is isolated.
5. measuring system as claimed in claim 3, which is characterized in that the EMI receiver includes the quasi-peak detector and is averaged
It is worth wave detector.
6. measuring system as claimed in claim 3, which is characterized in that the artificial mains network is V-type artificial mains network.
7. measuring system as claimed in claim 3, which is characterized in that the RF output end of the coupling decoupling network and the EMI
It is connected between the rf inputs of receiver by a coaxial cable.
8. measuring system as claimed in claim 3, which is characterized in that further include with reference to earth plate, the coupling decoupling network, mould
Quasi- load, artificial mains network and the power supply adaptor are arranged in this with reference on earth plate.
9. measuring system as claimed in claim 8, which is characterized in that the coupling decoupling network, the fictitious load, the artificial electricity
Source network and the power supply adaptor are greater than etc. at the Edge Distance of the projection with reference to the earth plate edge with reference to earth plate
In 0.5m.
10. measuring system as claimed in claim 8, which is characterized in that the power supply adaptor on insulating stand and be set as away from
This refer to earth plate vertical range 30cm to 50cm, the power supply adaptor exchange end to the artificial mains network level away from
It is arrived from the horizontal distance for 70cm to 90cm, DC output end to the coupling decoupling network of the power supply adaptor for 70cm
90cm。
11. measuring system as claimed in claim 10, which is characterized in that the power supply adaptor is away from this with reference to the vertical of earth plate
Distance is 40cm, and the horizontal distance of exchange end to the artificial mains network of the power supply adaptor are 80cm, the power supply adaptor
DC output end to the coupling decoupling network horizontal distance be 80cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410154846.0A CN105092993B (en) | 2014-04-17 | 2014-04-17 | Detect the method and measuring system of power supply adaptor |
| TW103121655A TWI601963B (en) | 2014-04-17 | 2014-06-24 | Detecting method of power adapter and measuring system |
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| CN201410154846.0A CN105092993B (en) | 2014-04-17 | 2014-04-17 | Detect the method and measuring system of power supply adaptor |
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| CN105092993A CN105092993A (en) | 2015-11-25 |
| CN105092993B true CN105092993B (en) | 2019-03-29 |
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| CN111025075B (en) * | 2020-01-14 | 2022-06-21 | 浙江吉利汽车研究院有限公司 | Electromagnetic disturbance test system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313868A (en) * | 2010-07-07 | 2012-01-11 | 鸿富锦精密工业（深圳）有限公司 | Telecommunication end measuring device |
| CN202351353U (en) * | 2011-12-14 | 2012-07-25 | 天津天维移动通讯终端检测有限公司 | Electro-magnetic interference detecting system for power line conduction |
| CN102914755A (en) * | 2011-08-03 | 2013-02-06 | 鸿富锦精密工业（深圳）有限公司 | Electromagnetic interference self-checking system and use method thereof |
| CN103018596A (en) * | 2012-11-30 | 2013-04-03 | 重庆长安汽车股份有限公司 | Electromagnetic interference testing system and electromagnetic interference testing method for direct-current converter |
-
2014
- 2014-04-17 CN CN201410154846.0A patent/CN105092993B/en active Active
- 2014-06-24 TW TW103121655A patent/TWI601963B/en active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313868A (en) * | 2010-07-07 | 2012-01-11 | 鸿富锦精密工业（深圳）有限公司 | Telecommunication end measuring device |
| CN102914755A (en) * | 2011-08-03 | 2013-02-06 | 鸿富锦精密工业（深圳）有限公司 | Electromagnetic interference self-checking system and use method thereof |
| CN202351353U (en) * | 2011-12-14 | 2012-07-25 | 天津天维移动通讯终端检测有限公司 | Electro-magnetic interference detecting system for power line conduction |
| CN103018596A (en) * | 2012-11-30 | 2013-04-03 | 重庆长安汽车股份有限公司 | Electromagnetic interference testing system and electromagnetic interference testing method for direct-current converter |
Non-Patent Citations (2)
| Title |
|---|
| 电信端传导共模骚扰测试问答;李思雄;《电子质量》;20101231(第12期);第65-67页 |
| 电信端口共模骚扰测试及ISN性能要求;王铮 等;《安全与电磁兼容》;20030831(第4期);第30-34页 |
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| Publication number | Publication date |
|---|---|
| TWI601963B (en) | 2017-10-11 |
| CN105092993A (en) | 2015-11-25 |
| TW201541096A (en) | 2015-11-01 |
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Effective date of registration: 20210108 Address after: 215200 no.1688, Jiangxing East Road, Wujiang Economic and Technological Development Zone, Wujiang City, Suzhou City, Jiangsu Province Patentee after: Delta Electronics (Jiangsu) Ltd. Address before: 215200 no.1688, Jiangxing East Road, Wujiang Economic Development Zone, Jiangsu Province Patentee before: DELTA ELECTRONICS COMPONENTS (WUJIANG) Ltd. |
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