CN203811648U - Standard sample for testing electromagnetic compatibility of lamp product - Google Patents
Standard sample for testing electromagnetic compatibility of lamp product Download PDFInfo
- Publication number
- CN203811648U CN203811648U CN201320701017.0U CN201320701017U CN203811648U CN 203811648 U CN203811648 U CN 203811648U CN 201320701017 U CN201320701017 U CN 201320701017U CN 203811648 U CN203811648 U CN 203811648U
- Authority
- CN
- China
- Prior art keywords
- circuit
- electric capacity
- power
- output terminal
- ground connection
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a standard sample for testing the electromagnetic compatibility of a lamp product, and the standard sample comprises an LC filter circuit, a power circuit, a crystal oscillator circuit, a frequency dividing circuit, a high-pass amplification circuit, a broadband amplification circuit, an impedance matching circuit, and an LC coupling circuit. The LC filter circuit is used for the low-pass filtering of an alternating-current power supply. A power circuit is used for converting an alternating current signal after filtering into a direct current signal, and supplying the direct current signal to a subsequent circuit chip. The crystal oscillator circuit and the frequency dividing circuit generate pulse signals with specific time intervals. The high-pass amplification circuit is used for the amplifying of the pulse signals, and comb-shaped pulse signals with flat amplitude-frequency curves are obtained after being amplified by the high-pass amplification circuit. The impedance matching circuit achieves the impedance matching of the high-pass amplification circuit with the LC coupling circuit. The LC coupling circuit enables the pulse signals to serve as disturbance signals which are coupled to an alternating-current power end. The standard sample provided by the utility model can generate the specific comb-shaped disturbance signals with noticeable characteristics, and enables the specific comb-shaped disturbance signals to be coupled to the alternating-current power end, thereby bringing convenience to a test system through a CDN method for measurement.
Description
Technical field
The utility model is a kind of standard model of light fixture EMC test.
Background technology
The CDN(decoupling network that is coupled) method is a kind of independent solution of carrying out light fixture product EMC emission test.At present, verify the consistance of CDN method measurement result with standard light fixture sample.Existing standard light fixture sample is made up of fluorescent light and ballast resistor, utilizes high pressure that moment that ballast resistor engages at alternating current switch produces fluorescent lamp lighting, verifies the consistance of CDN method test result by measuring the disturbance voltage of ballast resistor input end.The deficiency of existing standard light fixture sample is:
The first, what standard light fixture sample produced is to be not intended to harass signal, and harassing and wrecking signal does not have obvious feature, and its frequency stability and range stability poor, be difficult to ensure reliability and the consistance of CDN method proficiency testing;
The second, the frequency spectrum of the harassing and wrecking signal of standard light fixture product is narrower, cannot cover the test frequency range (30-300MHz) of CDN law regulation, and examination system is comprehensively used the harassing and wrecking characteristic in frequency range;
The 3rd, standard light fixture sample volume is large, carry out experimental comparison between each laboratory time, and the transport being unfavorable for and circulation;
Utility model content
The purpose of this utility model is to provide the standard model of a kind of light fixture EMC test, and this sample can produce pectination harassing and wrecking signal that feature significantly has a mind to and by this harassing and wrecking signal coupling stream power end that backcrosses, facilitate CDN method test macro to measure.
The purpose of this utility model is to realize by following technical measures:
A kind of light fixture EMC testing standard sample, described standard model comprises LC filtering circuit, power circuit, crystal oscillating circuit, frequency dividing circuit, high pass amplifying circuit, wideband amplification circuit, impedance matching circuit and LC coupled circuit, the input end incoming transport power supply of described LC filtering circuit, the input end of described power circuit is connected with described LC filtering circuit output terminal, the output terminal of power circuit respectively with crystal oscillating circuit, frequency dividing circuit, the power input of high pass amplifying circuit and wideband amplification circuit is connected, described crystal oscillating circuit output terminal passes through frequency dividing circuit successively, high pass amplifying circuit, wideband amplification circuit, impedance matching circuit and LC coupled circuit are connected to the coupled end of described LC filtering circuit, described LC filtering circuit carries out low-pass filtering to AC power, described power circuit changes filtered ac signal into direct current signal and offers subsequent conditioning circuit chip, crystal oscillating circuit and frequency dividing circuit produce the pulse signal at fixed time interval, the amplitude of high pass amplifying circuit pulse signals is amplified, the smooth pectination pulse signal of amplitude-frequency curve obtaining after wideband amplification circuit amplifies, impedance matching circuit is realized the impedance matching of wideband amplification circuit and LC coupled circuit, LC coupled circuit is using pulse signal as harassing and wrecking signal coupling to alternating current source.
For the ease of the carrying out of light fixture EMC test, and avoid continuing to produce having a mind to harass signal, described standard model also comprises switch; Described standard model accesses described AC power by this switch.
As the preferred implementation of the utility model LC filtering circuit, described LC filtering circuit comprises the first electric capacity, the second electric capacity, the 3rd electric capacity and wave filter; Two input ends of described wave filter are as the input end of described LC filtering circuit, described the first electric capacity is connected between two input ends of described wave filter, two output terminals of described wave filter are as the output terminal of described LC filtering circuit, one of them output terminal is by the second capacity earth, and another output terminal is by the 3rd capacity earth.
As a kind of embodiment of the utility model power circuit, described power circuit comprises transformer, rectifier bridge, the 4th electric capacity, the 5th electric capacity and three terminal regulator; The former limit winding of described transformer is connected with described LC filtering circuit output terminal as the input end of power circuit, the secondary winding two ends of transformer are connected with the positive and negative ac input end of rectifier bridge respectively, the positive direct-current output terminal of described rectifier bridge is by the 4th capacity earth, the negative direct ground connection of DC output end, the input end of described three terminal regulator is connected with the positive direct-current output terminal of described rectifier bridge, output terminal is as the DC output end of described power circuit and by the 5th capacity earth, the direct ground connection of earth terminal of described three terminal regulator.
As the preferred implementation of the utility model frequency dividing circuit, it is 4081 frequency division chip that described frequency dividing circuit is selected model.
As the preferred implementation of the utility model high pass amplifying circuit, described high pass amplifying circuit comprises the 8th electric capacity, the 9th electric capacity, the 4th resistance, the 5th resistance, the 6th resistance and triode; The 8th electric capacity is connected to the emitter of described triode as the input end of described high pass amplifying circuit, described transistor base is connected to the DC output end of described power circuit by the 4th resistance, simultaneously by the 5th resistance eutral grounding, the emitter of described triode is by the 6th resistance eutral grounding, by the 9th capacity earth, the collector of described triode is as the output terminal of described high pass amplifying circuit simultaneously.
As the preferred implementation of the utility model wideband amplification circuit, described wideband amplification circuit comprise the tenth electric capacity, wideband high-frequency amplification chip and transformer; One end of the former limit winding of described transformer is connected with the DC output end of described power circuit, the other end is connected with the output terminal of described high pass amplifying circuit, the direct ground connection in one end of the secondary winding of described transformer, the other end is connected to the amplifying signal input pin of described amplification chip by the tenth electric capacity, the power input of described amplification chip is connected with the DC output end of described power circuit, and described amplification chip is provided with as the feedback output end of described high pass amplifying circuit with for the harassing and wrecking signal output part of the negative adapter of external BNC.
As the preferred implementation of the utility model impedance filtering circuit, described impedance matching circuit comprises the 7th resistance and the 8th resistance; The 7th resistance is connected between the input end and output terminal of described impedance matching circuit, and described impedance matching circuit passes through the 8th resistance eutral grounding at input end.
As the preferred implementation of the utility model LC coupled circuit, described LC coupled circuit comprises the 11 electric capacity, and the 11 electric capacity described in it is connected between input end and output terminal.
Compared with prior art, the utlity model has following beneficial effect:
The utility model produces stable pulse signal by crystal oscillating circuit, and by frequency dividing circuit, produced pulse signal is adjusted to the pulse signal at certain frequency interval, high pass amplifying circuit paired pulses amplitude is amplified, wideband amplification circuit makes the amplitude-frequency characteristic of pulse signal more smooth, and impedance matching circuit and coupled circuit return using the pulse signal of moulding as harassing and wrecking signal coupling to the input end of standard model.Make the harassing and wrecking characteristic of standard model there is stability height and the comprehensive feature of covering frequence.
Like this, prior art is to utilize standard light fixture sample to carry out the checking of CDN method, the harassing and wrecking signal producing transmits for being not intended to, and the utility model is that the fixing pectination of frequency and amplitude has a mind to harass signal what carry out producing when CDN method is verified, the feature of harassing and wrecking signal is obvious, and by impedance matching circuit and coupled circuit by the harassing and wrecking stream power end that backcrosses that is coupled.The harassing and wrecking signal that the utility model produces has good frequency stability and range stability, can cover the whole examination frequency range of CDN method, has greatly improved the checking validity of CDN method test macro.The utility model can carry out the checking of CDN method easily, and the cycle verification of carrying out system for the electromagnetic compatibility testing laboratory that is correlated with provides necessary technique guarantee.
Attached caption
Below in conjunction with accompanying drawing table and specific embodiment, the utility model is described in further detail:
Fig. 1 is the schematic block circuit diagram of standard model of the present utility model;
Fig. 2 is the circuit theory diagrams of the utility model preferred implementation;
Fig. 3 is CDN method test philosophy figure;
Fig. 4 is the harassing and wrecking signal of test while carrying out the checking of CDN method with traditional standard light fixture sample;
Fig. 5 is the harassing and wrecking signal of test while carrying out the checking of CDN method with standard model of the present utility model.
Embodiment
As depicted in figs. 1 and 2, the preferential embodiment of the utility model light fixture EMC testing standard sample comprises K switch 1a, K1b, LC filtering circuit A1, power circuit A2, crystal oscillating circuit A3, frequency dividing circuit A4, high pass amplifying circuit A5, wideband amplification circuit A6, impedance matching circuit A7 and LC coupled circuit A8, the input end incoming transport power supply of described LC filtering circuit A1, the input end of described power circuit A3 is connected with described LC filtering circuit A1 output terminal, the output terminal of power circuit A3 respectively with crystal oscillating circuit A4, frequency dividing circuit A5, high pass amplifying circuit A6 is connected with the power input of wideband amplification circuit A7, described crystal oscillating circuit A3 output terminal is successively by frequency dividing circuit A4, high pass amplifying circuit A5, wideband amplification circuit A6, impedance matching circuit A7 and LC coupled circuit A8 are connected to the coupled end of described LC filtering circuit A1, described LC filtering circuit A1 carries out low-pass filtering to AC power, described power circuit A2 changes filtered ac signal into direct current signal and offers subsequent conditioning circuit chip, crystal oscillating circuit A3 and frequency dividing circuit A4 produce the pulse signal at fixed time interval, the amplitude of high pass amplifying circuit A5 pulse signals is amplified, wideband amplification circuit A6 makes the amplitude-frequency curve of the pectination pulse signal after amplification more smooth, impedance matching circuit A7 realizes the impedance matching of wideband amplification circuit A6 and LC coupled circuit A8, pulse signal is coupled to alternating current source by LC coupled circuit A8.
Above-mentioned LC coupled circuit A1 comprises the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3 and wave filter L1; Two input ends of described wave filter L1 are as the input end of described LC filtering circuit A1, described the first capacitor C 1 is connected between two input ends of described wave filter L1, two output terminals of described wave filter L1 are as the output terminal of described LC filtering circuit A1, one of them output terminal is by the second capacitor C 2 ground connection, and another output terminal is by the 3rd capacitor C 3 ground connection.
Above-mentioned power circuit A2 comprises transformer B1, rectifier bridge D1, the 4th capacitor C 4, three terminal regulator Ic1 and the 5th capacitor C 5, the former limit winding of described transformer B1 is connected with described LC filtering circuit A1 output terminal as the input end of power circuit A2, the secondary winding two ends of transformer B1 respectively with rectifier bridge D1 just, negative ac input end is connected, the positive direct-current output terminal of described rectifier bridge D1 is by the 4th capacitor C 4 ground connection, the negative direct ground connection of DC output end, the input end of described three terminal regulator Ic1 is connected with the positive direct-current output terminal of described rectifier bridge D1, output terminal is as the DC output end of described power circuit A2 and by the 5th capacitor C 5 ground connection, the direct ground connection of earth terminal of described three terminal regulator Ic1.
Above-mentioned crystal oscillating circuit A3 comprises crystal oscillator JT1, the 6th capacitor C 6, the 7th capacitor C 7, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first diode D2, the second diode D3 and chip 4060Ic2, one end of described crystal oscillator JT1 is by the 6th capacitor C 6 ground connection, the other end is by the 7th capacitor C 7 ground connection, described the first resistance R 3 is connected with crystal oscillator JT1 two ends respectively, the pin one 1 of described chip 4060Ic2 is by the 6th capacitor C 6 ground connection, pin one 0 is by the 7th capacitor C 7 ground connection, pin one 2 is by the second resistance R 2 ground connection, the direct ground connection of pin 8, pin one 6 connects the DC output end of described power circuit A2, pin one 4 is connected with the negative electrode of the second diode D3, pin 6 is connected with the negative electrode of the first diode D2, the positive electrode of described the first diode D2 and the second diode D3 is connected to the DC output end of described power circuit A2 by the 3rd resistance R 3.
Above-mentioned frequency dividing circuit A4 comprises chip 4081Ic3; The pin one 4 of described chip 4081Ic3 is connected with the DC output end of described power circuit A2, the direct ground connection of pin 7, and pin 4 and 10 links together as the output terminal of described frequency dividing circuit A4, and pin 3,5,6,8,9 links together.
Above-mentioned high pass amplifying circuit A5 comprises the 8th capacitor C 8, the nine capacitor C 9, the four resistance R 4, the five resistance R 5, the six resistance R 6 and triode 9018T1; The 8th capacitor C 8 is connected to the emitter of described triode 9018T1 as the input end of described high pass amplifying circuit A5, described triode 9018T1 base stage is connected to the DC output end of described power circuit A2 by the 4th resistance R 4, simultaneously by the 5th resistance R 5 ground connection, the emitter of described triode 9018T1 is by the 6th resistance R 6 ground connection, by the 9th capacitor C 9 ground connection, the collector of described triode 9018T1 is as the output terminal of described high pass amplifying circuit A5 simultaneously.
Above-mentioned wideband amplification circuit A6 comprises the tenth capacitor C 10,8620D type bandwidth High frequency amplification chip M1 and transformer L2; One end of the former limit winding of described transformer L2 is connected with the DC output end of described power circuit A2, the other end is connected with the output terminal of described high pass amplifying circuit A5, the direct ground connection in one end of the secondary winding of described transformer L2, the other end is connected to the pin one of described chip M1 by the tenth capacitor C 10, the pin two of described chip M1 is connected with the DC output end of described power circuit A2, the direct ground connection of pin 3, pin 4 is as the test port output of BNC adapter, and pin 5 is as the output terminal of described high pass amplifying circuit A5.
Above-mentioned impedance matching circuit A7 comprises the 7th resistance R 7 and the 8th resistance R 8; The 7th resistance R 7 is connected between the input end and output terminal of described impedance matching circuit A7, and described impedance matching circuit A7 passes through the 8th resistance R 8 ground connection at input end.
Above-mentioned LC coupled circuit A8 comprises that the 11 capacitor C 11, the 11 capacitor C 11 are connected between input end and output terminal.
The principle of work of the utility model standard model is described as follows:
LC filtering circuit A1: be used for AC power V1 to carry out low-pass filtering, the high-frequency signal in AC power is filtered out, then signal after filtering is complete is exported to power circuit A2.
Power circuit A2: the AC signal step-down that LC filtering circuit A1 is exported is also converted into the required d. c. voltage signal of subsequent conditioning circuit chip VCC.Referring to Fig. 1 and Fig. 2, its principle is: the alternating voltage of LC filtering circuit A1 output is reduced to the alternating voltage of 15V through step-down transformer B1, at the sinusoidal wave peak point through rectifier bridge D1 output peak point and AC power, corresponding and its cycle is the signal of this sinusoidal wave semiperiod, obtain the envelope of signal after rectification by discharging and recharging of capacitor C 5, again by the 12V DC voltage of three grades of stabilivolt 7812 stable outputs, for subsequent conditioning circuit chip provides stable VCC.
Crystal oscillating circuit A3 and frequency dividing circuit A4: crystal oscillating circuit A3 is for generation of a pulse signal, and frequency dividing circuit A2 is for obtaining the pulse signal of lower frequency from the higher pulse signal of frequency.
High pass amplifying circuit A5: for the pulse amplitude of frequency dividing circuit A4 output terminal is amplified.Referring to Fig. 1 and Fig. 2, its principle is: capacitor C 8 is carried out high-pass filtering processing to the pulse signal of frequency dividing circuit A4 output, then by triode T1, the amplitude of filtered pulse signal is amplified to output.
Wideband amplification circuit A6: for the pulse signal of high pass amplifying circuit A5 output being carried out to high and low frequency compensation on frequency domain, so that the amplitude versus frequency characteristic of the pulse signal after amplifying is more smooth.
Impedance matching circuit A7 and LC coupled circuit A8: impedance matching circuit A7 is for realizing the impedance matching between wideband amplification circuit A6 and LC coupled circuit A8, and LC coupled circuit A8 is for being coupled to alternating current source by pulse signal.
K switch 1a and K2b: when tester utilizes standard model of the present utility model to test, by of short duration closure this K switch 1a and K2b, can control criterion be coupled in the AC power break-make of pulse signal of sample, and don't as for making standard model cause damage because of switching electricity repeatedly.
Fig. 3 is the test philosophy schematic diagram of CDN method, standard model is connected to AC power by CDN, the measurement output terminal of CDN is connected on measuring receiver by attenuator, with the quasi-peak detector of 120kHz bandwidth being measured by the radio frequency output voltage of CDN, Fig. 4 is the disturbance voltage peak value measuring while carrying out the checking of CDN method with standard light fixture sample, as can be seen from the figure harass signal without obvious characteristic, following table one marks the disturbance voltage quasi-peak value on Frequency point for Fig. 4, Fig. 5 is the disturbance voltage peak value measuring while using this utility model to carry out the checking of CDN method, as can be seen from the figure harass signal and be pectination, frequency interval between peak-to-peak is fixed, and all equal 10MHz, following table two marks the disturbance voltage quasi-peak value on Frequency point for Fig. 5.
Table one
Table two
The utility model does not limit to and above-mentioned embodiment; according to foregoing; according to ordinary skill knowledge and the customary means of this area; do not departing under the above-mentioned basic fundamental thought of the utility model prerequisite; the utility model can also be made equivalent modifications, replacement or the change of other various ways, all drops among protection domain of the present utility model.
Claims (9)
1. a light fixture EMC testing standard sample, is characterized in that: described standard model comprise LC filtering circuit (A1), power circuit (A2), crystal oscillating circuit (A3), frequency dividing circuit (A4), high pass amplifying circuit (A5), wideband amplification circuit (A6), impedance matching circuit (A7) and LC coupled circuit (A8), the input end incoming transport power supply of described LC filtering circuit (A1), the input end of described power circuit (A3) is connected with described LC filtering circuit (A1) output terminal, the output terminal of power circuit (A3) respectively with crystal oscillating circuit (A4), frequency dividing circuit (A5), high pass amplifying circuit (A6) is connected with the power input of wideband amplification circuit (A7), described crystal oscillating circuit (A3) output terminal is successively by frequency dividing circuit (A4), high pass amplifying circuit (A5), wideband amplification circuit (A6), impedance matching circuit (A7) and LC coupled circuit (A8) are connected to the coupled end of described LC filtering circuit (A1), described LC filtering circuit (A1) carries out low-pass filtering to AC power, described power circuit (A2) changes filtered ac signal into d. c. voltage signal and offers subsequent conditioning circuit, crystal oscillating circuit (A3) and frequency dividing circuit (A4) produce the pulse signal at assigned frequency interval, the amplitude of high pass amplifying circuit (A5) pulse signals is amplified, the smooth pectination pulse signal of acquisition amplitude-frequency curve after wideband amplification circuit (A6) amplifies, impedance matching circuit (A7) is realized the impedance matching of wideband amplification circuit (A6) and LC coupled circuit (A8), LC coupled circuit (A8) is using pectination pulse signal as harassing and wrecking signal coupling to alternating current source.
2. light fixture EMC testing standard sample according to claim 1, it is characterized in that: described standard model also comprises power switch (K1a) and (K1b), wherein power switch (K1a) is connected to the phase line of AC power, and power switch (K1b) is connected to the zero line of AC power; The input end of described LC filtering circuit (A1) by this power switch (K1a) and (K1b) accesses described AC power.
3. light fixture EMC testing standard sample according to claim 2, is characterized in that: described LC filtering circuit (A1) comprises the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3) and wave filter (L1); Two input ends of described wave filter (L1) are as the input end of described LC filtering circuit (A1), described the first electric capacity (C1) is connected between two input ends of described wave filter (L1), two output terminals of described wave filter (L1) are as the output terminal of described LC filtering circuit (A1), one of them output terminal is by the second electric capacity (C2) ground connection, and another output terminal is by the 3rd electric capacity (C3) ground connection.
4. light fixture EMC testing standard sample according to claim 3, is characterized in that: described power circuit (A2) comprises transformer (B1), rectifier bridge (D1), the 4th electric capacity (C5), the 5th electric capacity (C6) and three terminal regulator (Ic1), the former limit winding of described transformer (B1) is connected with described LC filtering circuit (A1) output terminal as the input end of power circuit (A2), the secondary winding two ends of transformer (B1) respectively with rectifier bridge (D1) just, negative ac input end is connected, the positive direct-current output terminal of described rectifier bridge (D1) is by the 4th electric capacity (C5) ground connection, the negative direct ground connection of DC output end, the input end of described three terminal regulator (Ic1) is connected with the positive direct-current output terminal of described rectifier bridge (D1), output terminal is as the DC output end of described power circuit (A2) and by the 5th electric capacity (C6) ground connection, the direct ground connection of earth terminal of described three terminal regulator (Ic1).
5. light fixture EMC testing standard sample according to claim 4, is characterized in that: it is 4081 frequency division chip that described frequency dividing circuit (A4) is selected model.
6. light fixture EMC testing standard sample according to claim 5, it is characterized in that: described high pass amplifying circuit (A5) comprises the 8th electric capacity (C9) the 9th electric capacity (C10), the 4th resistance (R6), the 5th resistance (R7), the 6th resistance (R8) and triode (T1); The 8th electric capacity (C9) is connected to the emitter of described triode (T1) as the input end of described high pass amplifying circuit (A5), described triode (T1) base stage is connected to the DC output end of described power circuit (A2) by the 4th resistance (R6), simultaneously by the 5th resistance (R7) ground connection, the emitter of described triode (T1) is by the 6th resistance (R8) ground connection, by the 9th electric capacity (C10) ground connection, the collector of described triode (T1) is as the output terminal of described high pass amplifying circuit (A5) simultaneously.
7. light fixture EMC testing standard sample according to claim 6, is characterized in that: described wideband amplification circuit (A6) comprise the tenth electric capacity (C11), wideband high-frequency amplification chip (M1) and transformer (L2), one end of the former limit winding of described transformer (L2) is connected with the DC output end of described power circuit (A2), the other end is connected with the output terminal of described high pass amplifying circuit (A5), the direct ground connection in one end of the secondary winding of described transformer (L2), the other end is connected to the amplifying signal input pin of described wideband high-frequency amplification chip (M1) by the tenth electric capacity (C11), the power input of described amplification chip (M1) is connected with the DC output end of described power circuit (A2), described amplification chip is provided with as the feedback output end of described high pass amplifying circuit (A5) with for the harassing and wrecking signal output part of the negative adapter of external BNC.
8. light fixture EMC testing standard sample according to claim 7, is characterized in that: described impedance matching circuit (A7) comprises the 7th resistance (R1) and the 8th resistance (R2); The 7th resistance (R1) is connected between the input end and output terminal of described impedance matching circuit (A7), and described impedance matching circuit (A7) passes through the 8th resistance (R2) ground connection at input end.
9. light fixture EMC testing standard sample according to claim 8, is characterized in that: described LC coupled circuit (A8) comprises the 11 electric capacity (C4), and the 11 electric capacity (C4) is connected between input end and output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320701017.0U CN203811648U (en) | 2013-11-07 | 2013-11-07 | Standard sample for testing electromagnetic compatibility of lamp product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320701017.0U CN203811648U (en) | 2013-11-07 | 2013-11-07 | Standard sample for testing electromagnetic compatibility of lamp product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203811648U true CN203811648U (en) | 2014-09-03 |
Family
ID=51450381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320701017.0U Withdrawn - After Issue CN203811648U (en) | 2013-11-07 | 2013-11-07 | Standard sample for testing electromagnetic compatibility of lamp product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203811648U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110907718A (en) * | 2019-10-29 | 2020-03-24 | 威凯检测技术有限公司 | Electromagnetic compatibility radiation disturbance standard sample for lighting product |
-
2013
- 2013-11-07 CN CN201320701017.0U patent/CN203811648U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103713166B (en) * | 2013-11-07 | 2016-05-11 | 威凯检测技术有限公司 | A kind of light fixture EMC testing standard sample |
| CN110907718A (en) * | 2019-10-29 | 2020-03-24 | 威凯检测技术有限公司 | Electromagnetic compatibility radiation disturbance standard sample for lighting product |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103713166B (en) | A kind of light fixture EMC testing standard sample | |
| CN106546938A (en) | A kind of anti-DC component of current transformer and test even system | |
| CN101393255A (en) | Verifying apparatus for zinc oxide arrester tester | |
| CN104459396A (en) | Converter valve voltage-sharing testing instrument | |
| CN103513136A (en) | Transformer transmission characteristic test device and method | |
| CN202177692U (en) | Lightning arrester counter comprehensive calibration device | |
| CN108089091B (en) | Current transformer secondary wiring polarity measuring device and measuring instrument | |
| CN203811648U (en) | Standard sample for testing electromagnetic compatibility of lamp product | |
| CN204855627U (en) | Isolated alternating voltage sampling circuit | |
| CN204855631U (en) | Alternating current virtual value detection circuitry | |
| CN103018573B (en) | Field measurement system for dielectric loss value of crosslinked polyethylene power cable | |
| CN203310990U (en) | On-site accuracy verification device for 750 kV current transformer | |
| CN204515117U (en) | A kind of detection device for voltage mutual inductor adopting broad frequency signal source | |
| CN201697982U (en) | Multifunctional household appliance maintenance comprehensive testing instrument | |
| CN106841818A (en) | A kind of inductance measurement device based on resonance principle | |
| CN201289525Y (en) | Checkout device for zinc oxide lightning arrester tester | |
| CN208140868U (en) | Infrared direct current high voltage generating device | |
| CN106646051A (en) | Lightning arrester testing device and lightning arrester testing method | |
| CN203465372U (en) | Once through-flow three-phase simultaneous measurement detector for transformer station device | |
| CN204633468U (en) | A kind of area user identification zone device of multimode manner | |
| CN211043510U (en) | Impedance measuring device for grid-connected inverter | |
| CN207488479U (en) | A kind of current transformer detecting system | |
| CN102937665A (en) | Modulation direct-current voltage transformer | |
| CN202735413U (en) | Onsite measurement system of dielectric loss value of crosslinked polyethylene power cable | |
| CN106059374A (en) | Pure sine wave inverter with voltage sampling isolation function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140903 Effective date of abandoning: 20160511 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140903 Effective date of abandoning: 20160511 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |