CN204067022U - Comprehensive error compensation type instrument transformer - Google Patents
Comprehensive error compensation type instrument transformer Download PDFInfo
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- CN204067022U CN204067022U CN201420474709.0U CN201420474709U CN204067022U CN 204067022 U CN204067022 U CN 204067022U CN 201420474709 U CN201420474709 U CN 201420474709U CN 204067022 U CN204067022 U CN 204067022U
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Abstract
The utility model discloses a kind of comprehensive error compensation type instrument transformer, it comprises secondary coil, and this secondary coil comprises at least two iron core axis of winding side by side and be arranged in parallel; Described iron core winding includes main iron core and is nested with the auxiliary iron core outside this main iron core, this main iron core, auxiliary iron core are wound with some wire turns that one whole group of line is formed, and this wire turn comprises the first groups of turns be wound on main iron core and the second groups of turns be wrapped on main iron core and auxiliary iron core; Described auxiliary iron core is provided with short-circuited conducting sleeve; The secondary of described two iron core windings also tie is parallel with electric capacity; Described whole group of line comprises many parallel conducting wires, one of them wire than all the other wires at described main iron core or/and a few circle or many circles on auxiliary iron core.This utility model structure is simple, reasonable in design, and production technology is simple, improves qualification rate and the accuracy class of product, and properties of product are stablized.
Description
Technical field
The utility model belongs to instrument transformer technical field, be specifically related to a kind of can the instrument transformer of comprehensive error compensation type.
Background technology
Instrument transformer is the general name of current transformer and voltage transformer, can be low-voltage by high-voltage variable, big current becomes small area analysis, for measuring or protection system.High voltage or big current scaling transformation are mainly become normal low voltage (100V) or standard small area analysis (5A or 1A by its function; all refer to rated value), to realize standardization, the miniaturization of measuring instrument, proterctive equipment and automatic control equipment.Meanwhile, instrument transformer also can be used to separate high-voltage system, to ensure the safety of the person or equipment.
Current instrument transformer generally adopts ordinary silicon steel disc to roll into annular core, due to ordinary silicon steel plate iron core initial time permeability lower, when primary side current is less, the induced current error of current transformer is very large, low precision, along with the increase of primary side current, induced current error just reduces gradually.Be 200/5A to 100/5A for current ratio, and even 75/5A is compared with the current transformer of small dimension, when primary side current is less, the error of current transformer is often very large, the accuracy class of current transformer is made to be difficult to improve, therefore on ordinary silicon steel plate iron core with the small area analysis of commonsense method coiling than the accuracy class of current transformer generally all below 1 grade, offset-type current transformer as described in license CN103366938A, main iron core and auxiliary iron core mixing coiling is adopted to realize compensating magnetic shunt, secondary combined short-circuited conducting sleeve carries out short circuited turn compensation again, the class of accuracy that current transformer is measured significantly improves, whole product processes is simple, and improve qualification rate and the accuracy class of product, properties of product are stablized, the high-tension current inductor that capacitor and for example described in the patent No. 92218871.8 compensates, it is by outlet terminal parallel connection one capacitor in secondary winding, produce the idle component in a condenser current compensation exciting current thus, obtain good error compensation effect, for another the adjustable mutual-inductor described in patent No. CN87202550U, it regulates ratio error and the phase angle error of instrument transformer by the method for adjusting resistance, electric capacity, the change compensation number of turn, etc.
Although above-mentioned innovative product achieves the certain error compensate function of instrument transformer, in practice, its compensation effect also has certain room for promotion, and it is perfect that namely the utility model carries out improvement on this basis.
Summary of the invention
For above-mentioned weak point of the prior art, the utility model aims to provide a kind of comprehensive error compensation type instrument transformer, and structure is simple, reasonable in design, and production technology is simple, improves qualification rate and the accuracy class of product, and properties of product are stablized.
To achieve these goals, the technical solution of the utility model: a kind of comprehensive error compensation type instrument transformer, it comprises secondary coil, and this secondary coil comprises at least two iron core axis of winding side by side and be arranged in parallel; Described iron core winding includes main iron core and is nested with the auxiliary iron core outside this main iron core, this main iron core, auxiliary iron core are wound with some wire turns that one whole group of line is formed, and this wire turn comprises the first groups of turns be wound on main iron core and the second groups of turns be wrapped on main iron core and auxiliary iron core; Described auxiliary iron core is provided with short-circuited conducting sleeve; The secondary of described two iron core windings also tie is parallel with electric capacity; Described whole group of line comprises many parallel conducting wires, one of them wire than all the other wires at described main iron core or/and a few circle or many circles on auxiliary iron core.
Further, described main iron core is ultracrystallite; Described auxiliary iron core is that 2 ~ 4 circle silicon steel sheets roll and form; Insulation crimped paper is wrapped with at described main iron core; Polyester film is wrapped with at described auxiliary iron core; The fine copper wire composition of described short-circuited conducting sleeve to be soft copper sheet or 2 ~ 3 circle diameters be 0.5mm, it is inclined cross on two adjacent turns on described main iron core and auxiliary iron core, and this short-circuited conducting sleeve is across on the arbitrary or whole winding on described iron core winding.
The beneficial effects of the utility model: the iron core winding in parallel be set up in parallel by least two axis forms twin coil or multi-coil compensates, improve the number of ampere turns of instrument transformer; Outside main iron core, be nested with auxiliary iron core, by the magnetic shunt compensation of auxiliary iron core, even up the error curve of instrument transformer; Short circuited turn compensation is formed, adjustment phase difference by short-circuited conducting sleeve; Carry out capacitance compensation by shunt capacitance, phase difference error is finely tuned; Finally, compensated by fractional turns and adjust current error.Whole instrument transformer structure is simple, reasonable in design, production technology is simple, and it carries out comprehensive compensation in conjunction with fractional turns compensation, the compensation of little iron core, magnetic shunt compensation, capacitance compensation, short circuited turn compensation to secondary coil, improve qualification rate and the accuracy class of product, and properties of product are stablized.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation sketch of the present utility model;
Fig. 2 is the structural representation sketch of single iron core winding in Fig. 1.
Embodiment
The utility model is further described below in conjunction with specific embodiment and accompanying drawing.
A comprehensive error compensation type instrument transformer described as shown in Figure 1, Figure 2, it comprises secondary coil, and this secondary coil comprises at least two iron core windings 1,2 axially side by side and be arranged in parallel; Described iron core winding 1,2 includes main iron core 210 and is nested with the auxiliary iron core 211 outside this main iron core 210, this main iron core 210, auxiliary iron core 211 are wound with some wire turns 4 that one whole group of line is formed, and this wire turn 4 comprises the first groups of turns 41 be wound on main iron core 210 and the second groups of turns 42 be wrapped on main iron core 210 and auxiliary iron core 211; Described auxiliary iron core 211 is provided with short-circuited conducting sleeve 3; The secondary of described two iron core windings 1,2 also tie is parallel with electric capacity 5; Described whole group of line comprises many parallel conducting wires, one of them wire than all the other wires at described main iron core 210 or/and a few circle or many circles on auxiliary iron core 211.
Designing points of the present utility model is to carry out comprehensive compensation in conjunction with fractional turns compensation, the compensation of little iron core, magnetic shunt compensation, capacitance compensation, short circuited turn compensation to secondary coil, to improve qualification rate and the accuracy class of product, proved by test, these properties of product are stablized, suitable popularization.
Particularly, for secondary coil be two iron core windings 1,2 axially side by side and be arranged in parallel.Wherein, described main iron core 210 is ultracrystallite; And described auxiliary iron core 211 to be 2 ~ 4 circle silicon steel sheets roll and form; And be wrapped with the insulation crimped paper for playing isolation buffer effect at described main iron core 210, avoid producing the situation such as scuffing between enamelled wire and ultracrystallite and the quality that affects product; Be wrapped with polyester film at described auxiliary iron core 211, similarly, this polyester film has been used for isolation buffer effect, to avoid producing the situations such as scuffing between enamelled wire and silicon steel sheet.
For double-iron core winding parallel, effect improves number of ampere turns; For the magnetic shunt compensation that auxiliary iron core 211 produces, in order to even up error curve; For the compensation that fractional turns is formed, for adjusting current error, its performance is whole group of line in described main iron core 210 or/and separate a wire in last circle of the winding wire turn of auxiliary iron core 211, be incorporated to again after this wire is return a circle in whole group of line and form secondary connection, certainly, according to circumstances also can will separate a wire in last circle, be incorporated to again in whole group of line after this wire is continued winding one circle and form secondary connection, namely add a circle to adjust for negative, subtract a circle for just to adjust; Parallel capacitive compensation is then for finely tune phase difference; The short circuited turn compensation that short-circuited conducting sleeve 3 is formed, for directly adjusting phase data.
For short-circuited conducting sleeve 3, the fine copper wire composition of this short-circuited conducting sleeve 3 to be soft copper sheet or 2 ~ 3 circle diameters be 0.5mm, it is inclined cross in described main iron core 210 with on two adjacent turns on auxiliary iron core 211, and this short-circuited conducting sleeve 3 is across on the arbitrary or whole winding on described iron core winding 1,2.The setting of this short-circuited conducting sleeve 3, can establish as the case may be, can be arranged on single iron core, also can be arranged on whole iron core.
Above the technical scheme that the utility model embodiment provides is described in detail, apply specific case herein to set forth the principle of the utility model embodiment and execution mode, the explanation of above embodiment is only applicable to the principle helping to understand the utility model embodiment; Meanwhile, for one of ordinary skill in the art, according to the utility model embodiment, embodiment and range of application all will change, and in sum, this description should not be construed as restriction of the present utility model.
Claims (5)
1. a comprehensive error compensation type instrument transformer, comprises secondary coil, it is characterized in that: described secondary coil comprises at least two iron core windings (1,2) axially side by side and be arranged in parallel; Described iron core winding (1,2) includes main iron core (210) and is nested with at this main iron core (210) auxiliary iron core outward (211), this main iron core (210), auxiliary iron core (211) are wound with some wire turns (4) that one whole group of line is formed, and this wire turn (4) comprises the first groups of turns (41) be wound on main iron core (210) and the second groups of turns (42) be wrapped on main iron core (210) and auxiliary iron core (211); Described auxiliary iron core (211) is provided with short-circuited conducting sleeve (3); The secondary of described two iron core windings (1,2) also tie is parallel with electric capacity (5); Described whole group of line comprises many parallel conducting wires, one of them wire than all the other wires at described main iron core (210) or/and auxiliary iron core (211) upper a circle or many circles less.
2. comprehensive error compensation type instrument transformer according to claim 1, is characterized in that: described main iron core (210) is ultracrystallite.
3. comprehensive error compensation type instrument transformer according to claim 1 and 2, is characterized in that: described auxiliary iron core (211) is that 2 ~ 4 circle silicon steel sheets roll and form.
4. comprehensive error compensation type instrument transformer according to claim 3, is characterized in that: be wrapped with insulation crimped paper at described main iron core (210); Polyester film is wrapped with at described auxiliary iron core (211).
5. comprehensive error compensation type instrument transformer according to claim 1, it is characterized in that: described short-circuited conducting sleeve (3) for soft copper sheet or 2 ~ 3 circle diameters be the fine copper wire composition of 0.5mm, it is inclined cross on two adjacent turns on described main iron core (210) with auxiliary iron core (211), and this short-circuited conducting sleeve (3) is across on the arbitrary or whole winding on described iron core winding (1,2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474709.0U CN204067022U (en) | 2014-08-21 | 2014-08-21 | Comprehensive error compensation type instrument transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420474709.0U CN204067022U (en) | 2014-08-21 | 2014-08-21 | Comprehensive error compensation type instrument transformer |
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| CN204067022U true CN204067022U (en) | 2014-12-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378179A (en) * | 2018-11-20 | 2019-02-22 | 浙江天际互感器有限公司 | The anti-DC current transformer iron core of electromagnetic type and the anti-DC current transformer of electromagnetic type |
| CN109411205A (en) * | 2018-11-20 | 2019-03-01 | 中国电力科学研究院有限公司 | The anti-DC current transformer iron core of electromagnetic type and current transformer |
| CN113161134A (en) * | 2021-04-15 | 2021-07-23 | 上海置信智能电气有限公司 | anti-DC component two-stage current transformer |
-
2014
- 2014-08-21 CN CN201420474709.0U patent/CN204067022U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378179A (en) * | 2018-11-20 | 2019-02-22 | 浙江天际互感器有限公司 | The anti-DC current transformer iron core of electromagnetic type and the anti-DC current transformer of electromagnetic type |
| CN109411205A (en) * | 2018-11-20 | 2019-03-01 | 中国电力科学研究院有限公司 | The anti-DC current transformer iron core of electromagnetic type and current transformer |
| CN113161134A (en) * | 2021-04-15 | 2021-07-23 | 上海置信智能电气有限公司 | anti-DC component two-stage current transformer |
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