CN104678203A - Electromagnetic compatibility detection device for current transformer - Google Patents
Electromagnetic compatibility detection device for current transformer Download PDFInfo
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- CN104678203A CN104678203A CN201310629376.4A CN201310629376A CN104678203A CN 104678203 A CN104678203 A CN 104678203A CN 201310629376 A CN201310629376 A CN 201310629376A CN 104678203 A CN104678203 A CN 104678203A
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Abstract
The invention provides an electromagnetic compatibility detection device for a current transformer. The electromagnetic compatibility detection device comprises an semi-anechoic chamber and filters, wherein the current transformer is arranged in a sealed space formed by the semi-anechoic chamber, the filters are arranged outside the sealed space and are electrically connected with input and/or output power supply wires and/or signal wires of the current transformer, the filters comprise a direct current two-wire input filter, an alternating current three-phase three-wire input filter, a direct current two-wire output filter and an alternating current three-phase three-wire output filter, in addition, the rated voltage of the filters is equal to or greater than 1000V, and the rated current is equal to or greater than 1000A. The electromagnetic compatibility detection device for the current transformer provided by the invention has the advantages that through the arrangement of the filters, the introduction of external noise is avoided, and the shielding performance of the semi-anechoic chamber is ensured, so that the traction current transformer can carry out normal electromagnetic compatibility detection in the semi-anechoic chamber.
Description
Technical field
The present invention relates to electric and electronic technical field, particularly relate to a kind of current transformer electromagnetic compatibility pick-up unit.
Background technology
Along with formulation and the compulsory execution of domestic and international increasing EMC Directive, specification, standard, the electromagnetic compatibility problem of Electrical and Electronic product is subject to the attention of national governments and domestic and international manufacturer day by day.Semi-anechoic chamber carries out electromagnetic compatibility research, the basis of improving electromagnetic compatibility technology and requisite scientific method.
Semi-anechoic chamber, also known as electromagnetic compatible dark chamber, it is on the basis of electromagnetic shielding chamber, and on inwall four wall and top board, dress pastes electromagnetic wave absorbent material, and ground is desirable reflecting surface, thus the test condition of simulation open area test site.Because wall no reflection events ripple exists, therefore test with receiving at radiation-emitting, the precision of measurement is higher, is popular in more satisfactory electromagnetic compatibility detection place both at home and abroad at present.
Semi-anechoic chamber requires shielding properties and strictly, for avoiding that the noise of outside is introduced semi-anechoic chamber, all inputs through darkroom shield, out-put supply line and signal wire all need to carry out filtering.
In prior art, by arranging Conventional filters on the input of equipment to be detected, out-put supply line and signal wire, avoid the noise of outside to introduce semi-anechoic chamber.
But there is following shortcoming in prior art: because the traction convertor constrained input ceiling voltage of motor train unit and locomotive is more than 1000V, electric current is more than 1000A, by the restriction of Conventional compact performance of filter and parameter, traction convertor cannot carry out normal electromagnetic compatibility detection in semi-anechoic chamber.
Summary of the invention
The invention provides a kind of current transformer electromagnetic compatibility pick-up unit, in order to solve the restriction being subject to Conventional compact performance of filter and parameter existed in prior art, traction convertor cannot enter in semi-anechoic chamber the problem of carrying out normal electromagnetic compatibility detection.
The invention provides a kind of current transformer electromagnetic compatibility pick-up unit, comprise: semi-anechoic chamber and wave filter, current transformer is arranged in the confined space of described semi-anechoic chamber formation, it is outer and be electrically connected with the input of described current transformer and/or out-put supply line and/or signal wire that described wave filter is arranged at described confined space, and described wave filter comprises:
Direct current two line input filter, AC three-phase three line input filter, direct current two line output filter and/or AC three-phase three line output filter, and the rated voltage of described wave filter is equal to, or greater than 1000V, rated current is equal to, or greater than 1000A.
Current transformer electromagnetic compatibility pick-up unit provided by the invention, 1000V is equal to, or greater than by the outside upper rated voltage that arranges of confined space formed at semi-anechoic chamber, rated current is equal to, or greater than 1000A, and direct current two line filter be electrically connected with the input of current transformer and/or out-put supply line and/or signal wire and/or AC three-phase three line filter, avoid the introducing of external noise, ensure that the shielding properties of semi-anechoic chamber, make traction convertor can carry out normal electromagnetic compatibility detection in semi-anechoic chamber.
Accompanying drawing explanation
Fig. 1 is the structural representation of a current transformer electromagnetic compatibility pick-up unit provided by the invention embodiment;
Fig. 2 is the structural representation of another embodiment of current transformer electromagnetic compatibility pick-up unit provided by the invention;
Fig. 3 is the circuit theory diagrams of DC1800V/1500A wave filter;
Fig. 4 is the circuit theory diagrams of AC1100V/1200A wave filter.
Embodiment
Below by specific embodiment and accompanying drawing, technical scheme of the present invention is described in further detail.
Fig. 1 is the structural representation of a current transformer electromagnetic compatibility pick-up unit provided by the invention embodiment.As shown in Figure 1, this device specifically can comprise: semi-anechoic chamber 11 and wave filter 12, current transformer 13 is arranged in the confined space that semi-anechoic chamber 11 forms, and it is outer and be electrically connected with the input of current transformer 13 and/or out-put supply line and/or signal wire that wave filter 12 is arranged at confined space.Wherein, wave filter 12 specifically can comprise:
Direct current two line input filter 14, AC three-phase three line input filter 15, direct current two line output filter 16 and AC three-phase three line output filter 17, and the rated voltage of wave filter is equal to, or greater than 1000V, rated current is equal to, or greater than 1000A.
Concrete, different with operating mode according to the classification of current transformer, configure corresponding direct current two line filter or AC three-phase three line filter.In Fig. 1, the input power cord of direct current two line input filter 14 and current transformer 13 and/or signal wire are electrically connected; AC three-phase three line input filter 15 is also electrically connected with the input power cord of current transformer 13 and/or signal wire; One in two direct current two line output filters 16 is electrically connected with the out-put supply line of current transformer 13 and/or signal wire, and another is electrically connected with braking resistor with the DC chopped-wave of current transformer 13; Out-put supply line and/or the signal wire of AC three-phase three line output filter 17 and current transformer 13 are electrically connected.
For meeting the requirement of current transformer 13 pairs of wave filter 12 performances and parameter, the rated voltage of the wave filter 12 in Fig. 2 is equal to or is greater than 1000V, rated current is equal to or is greater than 1000A, to ensure that the normal operating characteristic of current transformer 13 is not by the impact of wave filter 12.
The current transformer electromagnetic compatibility pick-up unit that the present embodiment provides, 1000V is equal to, or greater than by the outside upper rated voltage that arranges of confined space formed at semi-anechoic chamber, rated current is equal to, or greater than 1000A, and direct current two line filter be electrically connected with the input of current transformer and/or out-put supply line and/or signal wire and/or AC three-phase three line filter, avoid the introducing of external noise, ensure that the shielding properties of semi-anechoic chamber, make traction convertor can carry out normal electromagnetic compatibility detection in semi-anechoic chamber.
Fig. 2 is the structural representation of another embodiment of electromagnetic compatibility pick-up unit provided by the invention.As shown in Figure 2, it is 1800V that the direct current two line input filter 14 in embodiment illustrated in fig. 1 is specifically as follows rated voltage, and rated current is the DC1800V/1500A wave filter 21 of 1500A.
Further, it is 2200V that the AC three-phase three line input filter 15 in embodiment illustrated in fig. 1 is specifically as follows rated voltage, and rated current is the AC2200V/2000A wave filter 22 of 2000A.
Further, it is 3000V that direct current two line output filter 16 in embodiment illustrated in fig. 1 is specifically as follows rated voltage, rated current is the DC3000V/800A wave filter 23 of 800A, and rated voltage is 1800V, and rated current is the DC1800V/1500A wave filter 24 of 1500A.
Further, it is 1100V that the AC three-phase three line output filter 17 in embodiment illustrated in fig. 1 is specifically as follows rated voltage, and rated current is the AC1100V/1200A wave filter 25 of 1200A.
Further, the wave filter 12 in embodiment illustrated in fig. 1 specifically can comprise ultracrystallite ring common mode inductance and metallized polypropylene electric capacity.
Wherein, the insertion loss of common mode inductance is arranged according to the operating characteristic of current transformer.
Concrete, the output waveform of current transformer 13 can be made close to the actual working state of current transformer 13 by the insertion loss of common mode inductance in adjustment wave filter 12 and internal circuit, namely under the prerequisite ensureing semi-anechoic chamber shielding properties, do not affect again the normal operating characteristic of current transformer, make traction convertor can carry out normal electromagnetic compatibility detection in semi-anechoic chamber.
Below using DC1800V/1500A wave filter as input filter, AC1100V/1200A wave filter is as output filter, and building pilot system with light rail traction convertor is example:
1, DC1800V/1500A wave filter
Table 1 is the characteristic of DC1800V/1500A wave filter.As shown in table 1, the rated voltage of DC1800V/1500A wave filter is direct current 1800Vdc, rated current is 1500A, frequency is 0, power-supplying forms is direct current two line, the insertion loss of common mode inductance is 100KHz-18GHz>100dB, for the input end of current transformer, as input filter.
The characteristic of table 1 DC1800V/1500A wave filter
Fig. 3 is the circuit theory diagrams of DC1800V/1500A wave filter.As shown in Figure 3, DC1800V/1500A wave filter comprises two ultracrystallite ring common mode inductances L1, L2, nine metallized polypropylene electric capacity C1-C9.Wherein, the parameter of common mode inductance and electric capacity is specific as follows:
（1）L1、L2
L1=L2 >=2 × 180uH(common mode inductance, ultracrystallite ring H160 × 90 × 30 2,1 circle, two groups)
（2）C1、C2、C8、C9
C1=C2=C8=C9=5.6uF(electric capacity, metallized polypropylene electric capacity 1.8kVdc-0.1uF six parallel connections+metallized polypropylene electric capacity 660Vac/1kVdc-10uF bis-series connection)
（3）C5、C6
C5=C6=5uF(electric capacity, metallized polypropylene electric capacity 660Vac/1kVdc-10uF bis-series connection)
（4）C3、C4、C7
C3=C4=C7=5uF(electric capacity, metallized polypropylene electric capacity 660Vac/1kVdc-10uF bis-series connection)
2, AC1100V/1200A wave filter
Table 2 is the characteristic of AC1100V/1200A wave filter.As shown in table 2, the rated voltage of AC1100V/1200A wave filter is direct current 1100Vac, and rated current is 1200A, frequency is 0-300Hz, and power-supplying forms is AC three-phase three line, and the insertion loss of common mode inductance is, for between the output terminal of current transformer and traction electric machine, as output filter.
The characteristic of table 2 AC1100V/1200A wave filter
Fig. 4 is the circuit theory diagrams of AC1100V/1200A wave filter.As shown in Figure 4, AC1100V/1200A wave filter comprises a ultracrystallite ring common mode inductance L3, six metallized polypropylene electric capacity C10-C15.Wherein, the parameter of common mode inductance and electric capacity is specific as follows:
（1）L3
L3 >=3 × 500uH(common mode inductance, ultracrystallite ring H195 × 125 × 200,1 circle, three groups)
（2）C10-C15
C10=C11=C12=C13=C14=C15=1500pF(electric capacity, metallized polypropylene electric capacity 3kVac-250pF six parallel connections)
3, test findings
Adopt above-mentioned DC1800V/1500A wave filter as input filter, AC1100V/1200A wave filter is as output filter, operating characteristic before testing the filtered operating characteristic of current transformer that obtains and current transformer filtering compared, result as shown in Table 3 and Table 4.
Table 3 is the forward and backward pulling figure contrast of current transformer filtering.As shown in table 3, the forward and backward pulling figure of current transformer filtering is basically identical, and namely adopt above-mentioned DC1800V/1500A wave filter as input filter, AC1100V/1200A wave filter, as output filter, does not produce a very large impact the pulling figure of current transformer.
Table 4 is the forward and backward braking characteristic contrast of current transformer filtering.As shown in table 4, the forward and backward braking characteristic of current transformer filtering is basically identical, and namely adopt above-mentioned DC1800V/1500A wave filter as input filter, AC1100V/1200A wave filter, as output filter, does not produce a very large impact the braking characteristic of current transformer.
The forward and backward pulling figure contrast of table 3 current transformer filtering
The forward and backward braking characteristic contrast of table 4 current transformer filtering
Note: "/" represents braking power and exceeds braking resistor power, therefore tests and does not carry out.
Can be found out by the forward and backward operating characteristic of current transformer filtering (traction characteristics and braking characteristic) contrast, the forward and backward operating characteristic of current transformer filtering is basically identical, namely adopt above-mentioned DC1800V/1500A wave filter as input filter, AC1100V/1200A wave filter is as output filter, under the prerequisite ensureing semi-anechoic chamber shielding properties, do not affect again the normal operating characteristic of current transformer, make traction convertor can carry out normal electromagnetic compatibility detection in semi-anechoic chamber.
The current transformer electromagnetic compatibility pick-up unit that the present embodiment provides, 1000V is equal to, or greater than by the outside upper rated voltage that arranges of confined space formed at semi-anechoic chamber, rated current is equal to, or greater than 1000A, and direct current two line filter be electrically connected with the input of current transformer and/or out-put supply line and/or signal wire and/or AC three-phase three line filter, avoid the introducing of external noise, under the prerequisite ensureing semi-anechoic chamber shielding properties, do not affect again the normal operating characteristic of current transformer, make traction convertor can carry out normal electromagnetic compatibility detection in semi-anechoic chamber.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a current transformer electromagnetic compatibility pick-up unit, comprise: semi-anechoic chamber and wave filter, current transformer is arranged in the confined space of described semi-anechoic chamber formation, it is outer and be electrically connected with the input of described current transformer and/or out-put supply line and/or signal wire that described wave filter is arranged at described confined space, it is characterized in that, described wave filter comprises:
Direct current two line input filter, AC three-phase three line input filter, direct current two line output filter and AC three-phase three line output filter, and the rated voltage of described wave filter is equal to, or greater than 1000V, rated current is equal to, or greater than 1000A.
2. device according to claim 1, is characterized in that, described direct current two line input filter is rated voltage is 1800V, and rated current is the DC1800V/1500A wave filter of 1500A.
3. device according to claim 1 and 2, is characterized in that, described AC three-phase three line input filter is rated voltage is 2200V, and rated current is the AC2200V/2000A wave filter of 2000A.
4. device according to claim 1 and 2, it is characterized in that, described direct current two line output filter is rated voltage is 3000V, and rated current is the DC3000V/800A wave filter of 800A, be 1800V with rated voltage, rated current is the DC1800V/1500A wave filter of 1500A.
5. device according to claim 1 and 2, is characterized in that, described AC three-phase three line output filter is rated voltage is 1100V, and rated current is the AC1100V/1200A wave filter of 1200A.
6. device according to claim 1 and 2, is characterized in that, described wave filter comprises ultracrystallite ring common mode inductance and metallized polypropylene electric capacity.
7. device according to claim 6, is characterized in that, the insertion loss of described common mode inductance is arranged according to the operating characteristic of described current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310629376.4A CN104678203A (en) | 2013-11-28 | 2013-11-28 | Electromagnetic compatibility detection device for current transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310629376.4A CN104678203A (en) | 2013-11-28 | 2013-11-28 | Electromagnetic compatibility detection device for current transformer |
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| CN104678203A true CN104678203A (en) | 2015-06-03 |
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| CN201310629376.4A Pending CN104678203A (en) | 2013-11-28 | 2013-11-28 | Electromagnetic compatibility detection device for current transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124869A (en) * | 2016-08-31 | 2016-11-16 | 卢俊文 | A kind of rail vehicle and track circuit emc testing system |
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| US4884171A (en) * | 1988-12-15 | 1989-11-28 | Howell Instruments | Electromagnetic interference shielding device for a portable aircraft engine tester |
| CN102435786A (en) * | 2011-09-08 | 2012-05-02 | 中国西电电气股份有限公司 | Turntable device with heavy-current output used for anechoic chamber |
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2013
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Patent Citations (3)
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|---|---|---|---|---|
| US4884171A (en) * | 1988-12-15 | 1989-11-28 | Howell Instruments | Electromagnetic interference shielding device for a portable aircraft engine tester |
| CN102435786A (en) * | 2011-09-08 | 2012-05-02 | 中国西电电气股份有限公司 | Turntable device with heavy-current output used for anechoic chamber |
| CN202713154U (en) * | 2012-05-28 | 2013-01-30 | 航天长峰朝阳电源有限公司 | Off-line low loss low peak secondary synchronous power supply |
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| 易红等: "中频发电机对检测装置的干扰剖析及EMI滤波器的实现", 《电子技术》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124869A (en) * | 2016-08-31 | 2016-11-16 | 卢俊文 | A kind of rail vehicle and track circuit emc testing system |
| CN106124869B (en) * | 2016-08-31 | 2019-09-10 | 卢俊文 | A kind of rail vehicle and track circuit electromagnetic compatibility testing system |
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Address after: 116045 Liaoning province Dalian City Lushun Economic Development Zone Dalian Hao Yang No. 1 North Street Applicant after: CRRC DALIAN ELECTRIC TRACTION R & D CENTER CO., LTD. Address before: 116045 Liaoning province Dalian City Lushun Economic Development Zone Dalian Hao Yang No. 1 North Street Applicant before: Co., Ltd of Bei Che Dalian Electric Traction R & D Center |
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Application publication date: 20150603 |