CN108845275A - Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers - Google Patents
Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers Download PDFInfo
- Publication number
- CN108845275A CN108845275A CN201810929736.5A CN201810929736A CN108845275A CN 108845275 A CN108845275 A CN 108845275A CN 201810929736 A CN201810929736 A CN 201810929736A CN 108845275 A CN108845275 A CN 108845275A
- Authority
- CN
- China
- Prior art keywords
- power supply
- switching power
- capacitor
- low pressure
- electromagnetism
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
The present invention provides the Switching Power Supply high-low pressure coupling attenuation characteristic test systems clamped based on electromagnetism, including being mounted on the indoor signal source G1 of shielding, the signal source G1 is connected to electromagnetism pincers through power amplification circuit and signal attenuator T1, one end of the electromagnetism pincers is connected to Switching Power Supply G2, the other end is connected to AC impedance stabilizing circuit, the AC impedance stabilizing circuit is connected to Switching Power Supply G2, the anode and cathode of the Switching Power Supply G2 is connected to DC impedance stabilizing circuit, resistance R7 is connected between the DC impedance stabilizing circuit, the DC impedance stabilizing circuit is connected to receiver.Switching Power Supply high-low pressure coupling attenuation characteristic test system of the present invention based on electromagnetism pincers, structure is simple, clear principle, versatile using the common test equipment being easy to get, it is ensured that the repeatability and consistency of test.
Description
Technical field
The invention belongs to technical field of electromagnetic compatibility measurement, more particularly, to a kind of Switching Power Supply height based on electromagnetism pincers
Press coupling attenuation characteristic test system.
Background technique
Switching Power Supply is widely used in industrial environment, can be by 220V AC conversion at the direct current of 12V or 5V.
Output voltage stabilization, small power consumption, voltage stabilized range is wide, these advantages are that linear power supply does not have.Thus set in railway, instrument
The industries such as standby, LED illumination obtain many applications.
When Switching Power Supply works, the on-off of power tube causes the voltage and current of circuit quickly to change, and causes larger voltage
Change rate du/dt and current changing rate di/dt, and then generate strong electromagnetic disturbance.This illustrates that the switching voltage of work is one
A interference source, the interference that it is generated can lead to connected or equipment working performance nearby decline.In addition, Switching Power Supply is equally
It is the path of harassing and wrecking transmission.It is made of inside Switching Power Supply electronic component, some passive devices, such as resistance, inductance, capacitor meeting
It is flowed to harassing and wrecking and access is provided.Power tube, diode not on conduct when, internal junction capacity equally exists.Junction capacity exists
Impedance when high frequency is lower, provides path for high frequency harassing and wrecking.In addition, the near field between element, between element and shell, harness is felt
Answer effect that can equally transmit harassing and wrecking energy.Due to these paths, being present in the on high-tension side interference of Switching Power Supply can be by opening
Powered-down source is coupled to low-voltage load side, influences the normal work of load.Although the interference of coupling has certain decaying, still
There is a possibility that generation interference.This influence can be described with high-low pressure coupling attenuation characteristic (Ac), and Ac is bigger, show switch electricity
The ability of source coupling attenuation is stronger, and the isolation of high-low pressure is higher；It is on the contrary then illustrate that the ability of coupling attenuation is weaker, high-low pressure
Isolation is lower.There is presently no the test macros about Switching Power Supply high-low pressure coupling attenuation.
Summary of the invention
In view of this, the present invention is directed to propose a kind of Switching Power Supply high-low pressure coupling attenuation characteristic test based on electromagnetism pincers
System is tested simultaneously with the test for realizing Switching Power Supply high-low pressure coupling attenuation characteristic in 0.15MHz~30MHz frequency range
The electrical isolation degree of Switching Power Supply high-voltage alternating side and low-voltage direct side.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers, including be mounted in screened room
Signal source G1, power amplification circuit, signal attenuator T1, electromagnetism pincers, Switching Power Supply G2, DC impedance stabilizing circuit, exchange
Impedance stabilization circuit and receiver, the signal source G1 are connected to institute through the power amplification circuit and the signal attenuator T1
The both ends of electromagnetism pincers are stated, one end of the electromagnetism pincers is connected to the firewire of the Switching Power Supply G2, and the other end is connected to the friendship
Flow impedance stabilizing circuit, the AC impedance stabilizing circuit are connected to the zero curve of the Switching Power Supply G2, the Switching Power Supply G2
Output end is connected to the DC impedance stabilizing circuit, and the DC impedance stabilizing circuit is connected to the receiver.
Further, the power amplification circuit includes power amplifier U1, the positive input of the power amplifier U1
End and negative input are connected to the both ends of the signal source G1 through resistance R3, resistance R1 respectively, the power amplifier U1's
Resistance R2 is connected between negative input and output end, the output end of the power amplifier U1 is connected to the signal attenuator
T1。
Further, the AC impedance stabilizing circuit includes capacitor C1, capacitor C2, inductance L1 and inductance L2, the electricity
One end of sense L2 is connected to the zero curve of the Switching Power Supply G2, and the other end is grounded through the capacitor C2, resistance R5, the inductance L1
One end be connected to electromagnetism pincers, the other end is grounded through the capacitor C1, resistance R4.
Further, the DC impedance stabilizing circuit include capacitor C3, capacitor C4, capacitor C5, capacitor C6, inductance L3 and
Inductance L4, one end of the inductance L3 are connected to the positive output line of the Switching Power Supply G2, are grounded after the capacitor C4, separately
One end respectively after the capacitor C3 and resistance R6 ground connection ground connection, be connected to through resistance R7 one end of the inductance L4, the electricity
The common end of the sense L4 and resistance R7 is grounded after the capacitor C5 and resistance R8, and the other end of the inductance L4 is connected to institute
It states the negative output line of Switching Power Supply G2, be grounded after the capacitor C6, the resistance R6 is in parallel with the receiver.
Further, the model CIT-10 of the signal source.
Further, the specification of the signal attenuator T1 is 6dB attenuator.
Further, the model EMCL-20 of the electromagnetism pincers.
Further, the model ESL3 of the receiver.
Further, the resistance value of the R7 is 50 Ω.
Compared with the existing technology, the Switching Power Supply high-low pressure coupling attenuation characteristic test of the present invention based on electromagnetism pincers
System has the advantage that：
(1) the Switching Power Supply high-low pressure coupling attenuation characteristic test system of the present invention based on electromagnetism pincers, structure letter
Single, clear principle, using the common test equipment being easy to get, cost of implementation is lower, versatile, has very strong popularizing action,
The test equipment of standard can guarantee the repeatability and consistency of test.
(2) the Switching Power Supply high-low pressure coupling attenuation characteristic test system of the present invention based on electromagnetism pincers, electromagnetism pincers
Capacitive coupling and inductive coupled the case where can be very good interference and coupling inlet wire beam in simulating practical service environment so that test
The test result of system is more accurate.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers described in the embodiment of the present invention
Circuit diagram.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Based on the Switching Power Supply high-low pressure coupling attenuation characteristic test system of electromagnetism pincers, as shown in Figure 1, including being mounted on screen
Cover indoor signal source G1, power amplification circuit, signal attenuator T1, electromagnetism pincers, the stable electricity of Switching Power Supply G2, DC impedance
Road, AC impedance stabilizing circuit and receiver, the signal source G1 is through the power amplification circuit and the signal attenuator T1
The both ends of the electromagnetism pincers are connected to, one end of the electromagnetism pincers is connected to the firewire of the Switching Power Supply G2, other end connection
To the AC impedance stabilizing circuit, the AC impedance stabilizing circuit is connected to the zero curve of the Switching Power Supply G2, described to open
Powered-down source G2 output end is connected to the DC impedance stabilizing circuit, and the DC impedance stabilizing circuit is connected to the reception
Machine, the system understand Switching Power Supply for testing Switching Power Supply high-low pressure coupling attenuation characteristic in 0.15MHz~30MHz frequency range
The electrical isolation degree of high-voltage alternating side and low-voltage direct side.
The power amplification circuit includes power amplifier U1, and the positive input and negative sense of the power amplifier U1 is defeated
Enter the both ends that end is connected to the signal source G1 through resistance R3, resistance R1 respectively, the negative input of the power amplifier U1
Resistance R2 is connected between output end, the output end of the power amplifier U1 is connected to the signal attenuator T1.
The AC impedance stabilizing circuit includes capacitor C1, capacitor C2, inductance L1 and inductance L2, one end of the inductance L2
It is connected to the zero curve of the Switching Power Supply G2, the other end is grounded through the capacitor C2, resistance R5, one end connection of the inductance L1
It is clamped to the electromagnetism, the other end is grounded through the capacitor C1, resistance R4, and AC impedance stabilizing circuit provides one in test frequency range
The stabilization impedance of a 50 Ω, is effectively ensured the consistency of test；There is filter action simultaneously.
The DC impedance stabilizing circuit includes capacitor C3, capacitor C4, capacitor C5, capacitor C6, inductance L3 and inductance L4, institute
The one end for stating inductance L3 is connected to the positive output line of the Switching Power Supply G2, is grounded after the capacitor C4, other end difference
After the capacitor C3 and resistance R6 ground connection ground connection, be connected to through resistance R7 one end of the inductance L4, the inductance L4 and institute
The common end for stating resistance R7 is grounded after the capacitor C5 and resistance R8, and the other end of the inductance L4 is connected to the switch electricity
The negative output line of source G2 is grounded after the capacitor C6, and the resistance R6 is in parallel with the receiver.
The model CIT-10 of the signal source.
The specification of the signal attenuator T1 is 6dB attenuator.
The model EMCL-20 of the electromagnetism pincers.
The model ESL3 of the receiver.
The resistance value of the R7 is 50 Ω, the actual loading for analog switched power supply G2.
The working principle of Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers is：
Signal source G1 generates the test signal of small magnitude, and test signal amplifies by power amplification circuit and signal attenuator
Output is clamped to electromagnetism after T2 decaying matching, and generates voltage V in the high-voltage alternating side of Switching Power Supply G2input=1V (120dB μ V)
With test signal.Electronic component and parasitic parameter inside Switching Power Supply G2 provide circulation path for test signal, therefore test
Signal can be coupled through Switching Power Supply G2.DC impedance stabilizing circuit can extract the test signal of low-voltage direct side.High pressure
The test signal of exchange side has certain decaying after passing through Switching Power Supply G2, measures DC impedance stabilizing circuit using receiver
Test signal amplitude (V after the decaying of outputoutput)；
Ac=Vinput-VoutputFormula 1
Utilize the high-low pressure coupling attenuation coefficient of the available Switching Power Supply of formula 1；
High-low pressure coupling attenuation coefficient for assess in 0.15MHz~30MHz frequency range Switching Power Supply G2 high-voltage alternating side and
The electrical isolation degree of low-voltage direct side.High-low pressure coupling attenuation coefficient is bigger, and the signal for being coupled through Switching Power Supply is smaller, instead
It is then bigger.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. the Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers, it is characterised in that：Including being mounted on screen
Cover indoor signal source G1, power amplification circuit, signal attenuator T1, electromagnetism pincers, the stable electricity of Switching Power Supply G2, DC impedance
Road, AC impedance stabilizing circuit and receiver, the signal source G1 is through the power amplification circuit and the signal attenuator T1
The both ends of the electromagnetism pincers are connected to, one end of the electromagnetism pincers is connected to the firewire of the Switching Power Supply G2, other end connection
To the AC impedance stabilizing circuit, the AC impedance stabilizing circuit is connected to the zero curve of the Switching Power Supply G2, described to open
Powered-down source G2 output end is connected to the DC impedance stabilizing circuit, and the DC impedance stabilizing circuit is connected to the reception
Machine.
2. the Switching Power Supply high-low pressure coupling attenuation characteristic test system according to claim 1 based on electromagnetism pincers, special
Sign is：The power amplification circuit includes power amplifier U1, and the positive input and negative sense of the power amplifier U1 is defeated
Enter the both ends that end is connected to the signal source G1 through resistance R3, resistance R1 respectively, the negative input of the power amplifier U1
Resistance R2 is connected between output end, the output end of the power amplifier U1 is connected to the signal attenuator T1.
3. the Switching Power Supply high-low pressure coupling attenuation characteristic test system according to claim 1 based on electromagnetism pincers, special
Sign is：The AC impedance stabilizing circuit includes capacitor C1, capacitor C2, inductance L1 and inductance L2, one end of the inductance L2
It is connected to the zero curve of the Switching Power Supply G2, the other end is grounded through the capacitor C2, resistance R5, one end connection of the inductance L1
It is clamped to the electromagnetism, the other end is grounded through the capacitor C1, resistance R4.
4. the Switching Power Supply high-low pressure coupling attenuation characteristic test system according to claim 1 based on electromagnetism pincers, special
Sign is：The DC impedance stabilizing circuit includes capacitor C3, capacitor C4, capacitor C5, capacitor C6, inductance L3 and inductance L4, institute
The one end for stating inductance L3 is connected to the positive output line of the Switching Power Supply G2, is grounded after the capacitor C4, other end difference
After the capacitor C3 and resistance R6 ground connection ground connection, be connected to through resistance R7 one end of the inductance L4, the inductance L4 and institute
The common end for stating resistance R7 is grounded after the capacitor C5 and resistance R8, and the other end of the inductance L4 is connected to the switch electricity
The negative output line of source G2 is grounded after the capacitor C6, and the resistance R6 is in parallel with the receiver.
5. the Switching Power Supply high-low pressure coupling attenuation characteristic test system according to claim 1 based on electromagnetism pincers, special
Sign is：The model CIT-10 of the signal source.
6. the Switching Power Supply high-low pressure coupling attenuation characteristic test system according to claim 1 based on electromagnetism pincers, special
Sign is：The specification of the signal attenuator T1 is 6dB attenuator.
7. the Switching Power Supply high-low pressure coupling attenuation characteristic test system according to claim 1 based on electromagnetism pincers, special
Sign is：The model EMCL-20 of the electromagnetism pincers.
8. the Switching Power Supply high-low pressure coupling attenuation characteristic test system according to claim 1 based on electromagnetism pincers, special
Sign is：The model ESL3 of the receiver.
9. the Switching Power Supply high-low pressure coupling attenuation characteristic test system according to claim 4 based on electromagnetism pincers, special
Sign is：The resistance value of the R7 is 50 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810929736.5A CN108845275A (en) | 2018-08-15 | 2018-08-15 | Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810929736.5A CN108845275A (en) | 2018-08-15 | 2018-08-15 | Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108845275A true CN108845275A (en) | 2018-11-20 |
Family
ID=64189147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810929736.5A Pending CN108845275A (en) | 2018-08-15 | 2018-08-15 | Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108845275A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248138A (en) * | 2013-05-28 | 2013-08-14 | 东南大学 | Power tracking control device and method for mobile equipment wireless power supply system |
| CN103713166A (en) * | 2013-11-07 | 2014-04-09 | 威凯检测技术有限公司 | Lamp product electromagnetic compatibility test standard sample |
| CN104265542A (en) * | 2014-10-17 | 2015-01-07 | 天津市新阳汽车电子有限公司 | Production ignition coil small voltage detector |
| CN204231341U (en) * | 2014-11-14 | 2015-03-25 | 北京泛在互联科技有限公司 | A kind of voltage Power Line Carrier Channel comprehensive test device |
| CN108287283A (en) * | 2018-02-05 | 2018-07-17 | 天津理工大学 | The test equipment and conducted immunity test method of a kind of impedance loop under industrial environment |
| CN208795828U (en) * | 2018-08-15 | 2019-04-26 | 中汽研（常州）汽车工程研究院有限公司 | Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers |
-
2018
- 2018-08-15 CN CN201810929736.5A patent/CN108845275A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248138A (en) * | 2013-05-28 | 2013-08-14 | 东南大学 | Power tracking control device and method for mobile equipment wireless power supply system |
| CN103713166A (en) * | 2013-11-07 | 2014-04-09 | 威凯检测技术有限公司 | Lamp product electromagnetic compatibility test standard sample |
| CN104265542A (en) * | 2014-10-17 | 2015-01-07 | 天津市新阳汽车电子有限公司 | Production ignition coil small voltage detector |
| CN204231341U (en) * | 2014-11-14 | 2015-03-25 | 北京泛在互联科技有限公司 | A kind of voltage Power Line Carrier Channel comprehensive test device |
| CN108287283A (en) * | 2018-02-05 | 2018-07-17 | 天津理工大学 | The test equipment and conducted immunity test method of a kind of impedance loop under industrial environment |
| CN208795828U (en) * | 2018-08-15 | 2019-04-26 | 中汽研（常州）汽车工程研究院有限公司 | Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers |
Non-Patent Citations (2)
| Title |
|---|
| 周宇奎: "电动汽车高压部件耦合衰减的测试方法", 安全与电磁兼容, no. 4, pages 16 - 18 * |
| 杨亮: "固定灭火系统控制装置传导骚扰抗扰度测试研究", 消防科学与技术, vol. 27, no. 1, pages 1 - 4 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102882365B (en) | A kind of earthing method for adaptor power supplies | |
| CN100427957C (en) | Device and method for measuring internal impedance of noise source of switch power supply EMI | |
| CN105223425B (en) | Automatically system is destaticed | |
| CN101010874A (en) | Active electromagnetic interference filter circuit for suppressing a line conducted interference signal | |
| US11951851B2 (en) | Switching device for a coil | |
| CN104678189A (en) | EMI-filter-based electromagnetic interference noise measuring and suppressing system | |
| CN208795828U (en) | Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers | |
| CN103713166B (en) | A kind of light fixture EMC testing standard sample | |
| CN104807537A (en) | Noise sensor | |
| CN108845275A (en) | Switching Power Supply high-low pressure coupling attenuation characteristic test system based on electromagnetism pincers | |
| CN108008173B (en) | Alternating current-direct current superposition testing device | |
| CN108458742A (en) | A kind of railway contact line detection signal transmitting apparatus and method | |
| CN208795829U (en) | A kind of test macro of the Switching Power Supply high-low pressure coupling attenuation characteristic based on capacitor | |
| CN103701454A (en) | Interface circuit for motor controller of hybrid power bus | |
| CN204993052U (en) | EMC wave filter | |
| CN108845276A (en) | A kind of test macro of the Switching Power Supply high-low pressure coupling attenuation characteristic based on capacitor | |
| CN107328488A (en) | Combined type trans system based on electric field induction | |
| CN203249946U (en) | Three-phase keyboard type electric energy meter | |
| CN108828465A (en) | A kind of test method of Switching Power Supply high-low pressure coupling attenuation characteristic | |
| CN204575747U (en) | Equipment ground impedance self-checking circuit | |
| CN202127357U (en) | Adapter power source device | |
| CN202757980U (en) | Analog signal isolation detection circuit | |
| CN112433086A (en) | Terminal voltage measurement network of split type air conditioner interconnection line | |
| CN217360098U (en) | Isolated dielectric state detection circuit and electric device adopting same | |
| Zhu | EMC in power electronics and PCB design |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190111 Address after: Room 227, No. 18 Xinya Road, Wujin National High-tech Industrial Development Zone, Changzhou City, Jiangsu Province Applicant after: Bari (Changzhou) Automotive Engineering Research Institute Co. Ltd. Applicant after: China Automotive Technology Research Center Co., Ltd. Address before: 300457 TEDA MSD-B1-1907, 62 Second Avenue, Binhai New Area Development Zone, Tianjin Applicant before: Bari (Tianjin) Automotive Engineering Research Institute Co. Ltd. Applicant before: China Automotive Technology Research Center Co., Ltd. |
|
| TA01 | Transfer of patent application right |