CN112825283A - Current proportioning device capable of adjusting transformation ratio and manufacturing method thereof - Google Patents
Current proportioning device capable of adjusting transformation ratio and manufacturing method thereof Download PDFInfo
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- CN112825283A CN112825283A CN201911116606.0A CN201911116606A CN112825283A CN 112825283 A CN112825283 A CN 112825283A CN 201911116606 A CN201911116606 A CN 201911116606A CN 112825283 A CN112825283 A CN 112825283A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
- H01F41/022—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) by winding the strips or ribbons around a coil
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
Abstract
The invention discloses a current proportioning device capable of adjusting transformation ratio, which comprises at least one magnetic core and an enameled wire uniformly wound on each magnetic core, wherein the enameled wire is wound on two sides of the magnetic core to respectively form a primary winding and a secondary winding combination; and the secondary winding combination comprises a plurality of secondary windings, each secondary winding is connected to the second tap and is connected to the secondary main loop through the second tap, a switch assembly is further arranged between each secondary winding and the secondary main loop, and whether each secondary winding is connected to the secondary main loop in series or not is controlled through the opening and closing cooperation of the switch assembly. The invention realizes the adjustment of the sum of the winding turns of the secondary winding by changing the connection relation of the secondary windings, thereby realizing the adjustment of the current transformation ratio, simplifying the operation steps, improving the operation efficiency and reducing the time and labor cost.
Description
Technical Field
The invention relates to the technical field of electromagnetism, in particular to a current proportioning device capable of adjusting a transformation ratio and a manufacturing method thereof.
Background
The current proportioning device is generally used for accurately converting large current into small current according to a certain proportion, and the current proportioning device can be used for measuring the current and the electric energy of a system by matching with a measuring instrument and a metering device. Different application occasions often need different transformation ratios, and the transformation ratio selection of the current proportion device needs to be selected and matched according to the magnitude of load current of different occasions, and if the selection is improper, the accuracy of metering is directly influenced.
With the continuous improvement of living standard of people, basically every household electrical appliance is complete, especially the cooling load and the heating load in summer and winter are greatly increased, so that the load in spring and autumn is greatly different from the load in summer and winter, and when seasons are changed, a current proportioning device needs to be replaced for measurement, thus the operation is troublesome, and the investment of manpower and time cost is increased.
Therefore, it is necessary to design a current ratio device capable of adjusting the transformation ratio and a manufacturing method thereof, so that a plurality of measurement requirements can be met by using one set of device.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the current proportion device capable of adjusting the transformation ratio and the manufacturing method thereof are provided, the transformation ratio adjustment under the decimal system can be conveniently realized, the operation steps are simplified, the efficiency is improved, and the labor and time costs are reduced.
In order to solve the technical problems, the invention is realized by the following technical scheme: a current proportioning device capable of adjusting transformation ratio comprises at least one magnetic core and enameled wires uniformly wound on each magnetic core, wherein the enameled wires are wound on two sides of the magnetic cores to respectively form a primary winding and a secondary winding combination, wherein,
the primary winding is connected to a first tap and is connected to a primary main loop through the first tap;
and the secondary winding combination comprises a plurality of secondary windings, each secondary winding is connected to the second tap and is connected to the secondary main loop through the second tap, a switch assembly is further arranged between each secondary winding and the secondary main loop, and whether each secondary winding is connected to the secondary main loop in series or not is controlled through the opening and closing cooperation of the switch assembly.
Further, each of the switch assemblies includes a first switch and a second switch; each first switch is connected in series with the secondary side main loop; each second switch is connected with the corresponding secondary winding in series and then connected with each corresponding first switch in parallel.
Furthermore, the number of turns of each secondary winding ranges from 1 to 1000 turns, and parameters at least include 1000 turns, 500 turns, 10 turns, 5 turns, 2 turns and 1 turn.
Further, the first tap and the second tap are both two terminals connected to both ends of each winding.
Further, according to the principle of magnetomotive force balance, the product of the primary current on the primary winding side and the number of turns of the primary winding and the product of the secondary current on the secondary winding and the number of turns of the secondary winding are equal, that is
NP*IP＝NS*IS
Wherein N isPIs the number of turns of the primary winding, IPIs the current flowing through the primary side main loop; n is a radical ofSThe sum of the turns of all secondary windings connected in series on the secondary main loop, ISThe current flows through the secondary side main loop;
when current I flows through the primary side main loopPWhen not changed, the sum N of the turns of all secondary windings connected in series on the secondary main loop is changedSTo control the current transformation ratio.
Further, the magnetic core is a magnetic annular iron core, and the cross section of the annular iron core is rectangular.
Furthermore, at least one layer of polyester film adhesive tape is wound on the surface of the annular iron core.
Further, the first switch is a manual switch or a relay; the second switch is a manual switch or a relay, and the first switch and the second switch at each secondary winding are always in an open state and a closed state.
Furthermore, the manual switch is a single-pole single-throw switch which is manually shifted, and the relay is controlled by a digital circuit of the single chip microcomputer; the first switch is in the normally-on position of one switch in the duplex switch, the second switch is in the normally-off position of the other switch in the duplex switch, and the unused contact of the switch is suspended.
Furthermore, the interior of the enameled wire is made of pure copper materials, and the exterior of the enameled wire is made of insulating materials.
The invention also provides a manufacturing method of the current proportion device with adjustable transformation ratio, which comprises the following steps:
winding at least one layer of polyester film adhesive tape on the surface of the magnetic core through a tape wrapping machine;
winding multiple turns of enameled wires on two sides of the magnetic core through a winding machine to form a primary winding and a plurality of secondary windings respectively;
connecting the primary winding to a primary main loop through a first tap, and connecting the plurality of secondary windings to a secondary main loop through a second tap;
setting a switch assembly between each secondary winding and the secondary main loop;
and fifthly, controlling whether each secondary winding is connected in series to the secondary main loop or not by controlling the on-off matching of the switch assembly when the current transformation ratio is adjusted.
Compared with the prior art, the invention has the advantages that:
the current proportion device capable of adjusting the transformation ratio realizes the adjustment of the sum of the winding turns of the secondary winding by changing the connection relation of each secondary winding, thereby realizing the transformation ratio of adjusting the current proportion, simplifying the operation steps, improving the operation efficiency and reducing the time and labor cost;
the current proportion device capable of adjusting the transformation ratio realizes whether the secondary windings with different winding turns are connected in series on the secondary main loop or not through selective on-off matching of the switch assembly, so that the total number of the winding turns of the secondary windings is adjusted, decimal transformation ratio is convenient to realize through turn distribution, any integer value transformation ratio in a transformation ratio range can be realized, the operation speed is greatly accelerated, the current transformation ratio conversion function can be completed in a cheap and batch mode, and the adjustment precision of the current transformation ratio can be improved through the diversification of winding turn number parameters of each secondary winding.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic circuit diagram of an adjustable ratio current proportioning device according to the present invention;
1. a primary winding; 2. a magnetic core; 3. a secondary winding; 4. a first tap; 5. a first switch; 6. a second switch; 7. a second tap; 8. a primary side primary loop; 9. and a secondary side main loop.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Example one
The scaling-adjustable current proportioning device shown in fig. 1 can conveniently realize decimal scaling adjustment, and comprises at least one magnetic core 2 and enameled wires uniformly wound on each magnetic core 2, in this embodiment, taking one magnetic core as an example, the enameled wires are wound on two sides of the magnetic core 2 to form a primary winding 1 and a secondary winding combination respectively, wherein,
the magnetic core 2 is a magnetic annular iron core, the section of the annular iron core is rectangular, and the section of the annular iron core is isosceles trapezoid in another embodiment of the invention;
the enameled wire is made of pure copper materials inside and insulating materials outside, is a traditional existing material, and is not described herein again;
the primary winding 1, the number of which is one in the embodiment, has the number of turns selected according to the requirements of practical application, is connected to the first tap 4, and is connected to the primary main loop 8 through the first tap 4; the first tap 4 is two connector lugs connected to two ends of the primary winding 1;
the secondary winding combination comprises a plurality of secondary windings 3, each secondary winding 3 is connected to a second tap 7 and is connected to a secondary main loop 9 through the second tap 7, a switch assembly is further arranged between each secondary winding 3 and the secondary main loop 9, and whether each secondary winding 3 is connected to the secondary main loop 9 in series or not is controlled through the opening and closing cooperation of the switch assembly;
each of the switch assemblies comprises a first switch 5 and a second switch 6; each first switch 5 is connected in series with the secondary side main loop 9; each second switch 6 is connected in series with the corresponding secondary winding 3 and then connected in parallel with each corresponding first switch 5, and specifically, the first switches 5 are installed in the middle of each group of second taps 7 on the secondary main loop 9; each group of the second taps 7 is provided with a second switch 6, and whether corresponding secondary windings are connected in series to the secondary main loop 9 is selected by controlling the on-off matching of the first switch 5 and the second switch 6; the second taps 7 are two connector lugs connected to two ends of each secondary winding 3 and have basically the same structure as the first taps 4;
when the secondary winding is used specifically, when the first switch 5 at the secondary winding is opened and the second switch 6 is closed, current directly flows from the main loop, the secondary winding is not connected in series to the secondary main loop 9, when the first switch 5 is closed and the second switch 6 is opened, current flows from the secondary winding 3, the secondary winding is connected in series to the secondary main loop 9, the number of the secondary windings in series and the sum of the number of winding turns in the secondary winding combination are adjusted by flexibly adjusting the opening and closing of the first switch 5 and the second switch 6 at each secondary winding, the number of the winding turns is distributed to realize decimal transformation ratio, and any integer value transformation ratio in a transformation ratio range can be realized, so that the operation steps are simplified, the operation efficiency is improved, the time cost and the labor cost are reduced, and the function of transformation ratio conversion of current is realized in a cheap and batch mode.
Preferably, the number of turns of each secondary winding 3 ranges from 1 to 1000 turns, and the number of turns of each secondary winding is diversified, so that the adjustment precision of the transformation ratio can be improved; in this embodiment, the number of turns of each secondary winding is 500 turns, 1000 turns, 200 turns, 100 turns, 50 turns, 20 turns, 10 turns, 5 turns, 2 turns, 1 turn, when the secondary winding has only the first switch 5 to open and the second switch 6 to close, the number of turns of the secondary winding is 500 turns, when only the first two switches 5 open and the second switch 6 to close and close, the number of turns of the secondary winding is 1000 turns, and so on, and different sums of the number of turns of the secondary winding can be obtained through various combination modes, so that adjustable current proportion is realized, flexibility of application of the invention is greatly improved, and various measurement requirements can be met by using one set of device.
The theoretical basis of the invention is the magnetic potential balance principle, the product of the primary current on the primary winding side and the number of turns of the primary winding is equal to the product of the secondary current of the secondary winding and the number of turns of the secondary winding, namely
NP*IP＝NS*IS
Wherein N isPIs the number of turns, I, of the primary winding 1PIs the current flowing through the primary side main loop 8; n is a radical ofSIs the sum of the turns I of all secondary windings 3 connected in series on the secondary main loop 9SIs the current flowing through the secondary side main loop 9;
when a current I flows through the primary side main loop 8PWhile not changing, the sum N of the turns of all the secondary windings 3 connected in series on the secondary main loop 9 is changedSThe current transformation ratio is controlled by the size of the transformer, the structure is simple, and the operation is convenient.
Preferably, at least one layer of polyester film adhesive tape is wound on the surface of the annular iron core, so that the situation that the enameled wire and the annular iron core are accidentally short-circuited is effectively avoided.
In this embodiment, the first switch 5 and the second switch 6 are manual switches, and the manual switches are single-pole single-throw switches that are manually toggled, so that the structure is simple, the installation is convenient and fast, and the cost is low.
The current proportioning device capable of adjusting the transformation ratio is based on the magnetic modulation principle, can measure direct current or alternating current simultaneously, and has high precision and bandwidth.
Example two
The variable ratio adjustable current proportioning device shown in figure 1 comprises at least one magnetic core 2 and an enameled wire uniformly wound on each magnetic core 2, wherein the enameled wire is wound on two sides of the magnetic core 2 to form a primary winding 1 and a secondary winding combination respectively, wherein,
a primary winding 1 connected to a first tap 4 and to a primary main loop 8 via said first tap 4;
the secondary winding combination comprises a plurality of secondary windings 3, each secondary winding 3 is connected to a second tap 7 and is connected to a secondary main loop 9 through the second tap 7, a switch assembly is further arranged between each secondary winding 3 and the secondary main loop 9, and whether each secondary winding 3 is connected to the secondary main loop 9 in series or not is controlled through the opening and closing cooperation of the switch assembly;
each of the switch assemblies comprises a first switch 5 and a second switch 6; each first switch 5 is connected in series with the secondary side main loop 9; each second switch 6 is connected in series with the corresponding secondary winding 3 and then connected in parallel with the corresponding first switch 5.
The difference from the first embodiment is that the first switch 5 and the second switch 6 are relays controlled by a singlechip digital circuit, so that the labor cost can be reduced and automatic control can be realized; other using processes and principles are the same as those of the first embodiment.
EXAMPLE III
The invention further provides a manufacturing method of the variable ratio adjustable current proportion device on the basis of the first embodiment or the second embodiment, which comprises the following steps:
winding at least one layer of polyester film adhesive tape on the surface of the magnetic core 2 through a tape wrapping machine, so that the situation of accidental short circuit between an enameled wire and an annular iron core is effectively avoided;
winding multiple turns of enameled wires on two sides of the magnetic core 1 through a winding machine to form a primary winding 1 and a plurality of secondary windings 3 respectively;
thirdly, connecting the primary winding 1 to a primary main loop 8 through a first tap 4, and connecting the plurality of secondary windings 3 to a secondary main loop 9 through a second tap 7;
step four, arranging a switch assembly between each secondary winding 3 and the secondary main loop 9;
fifthly, controlling whether each secondary winding 3 is connected in series to the secondary main loop 9 or not by controlling the on-off matching of the switch assemblies when adjusting the current transformation ratio, wherein each switch assembly comprises a first switch 5 and a second switch 6;
when the secondary winding is used, when the first switch 5 and the second switch 6 at the secondary winding are opened and the second switch 6 is closed, current directly flows from the main loop, the secondary winding is not connected to the secondary main loop 9 in series, when the first switch 5 and the second switch 6 are closed and the secondary winding 3 flows, the secondary winding is connected to the secondary main loop 9 in series, and the number of the secondary windings in series and the sum of the number of winding turns in the secondary winding combination are adjusted by flexibly adjusting the opening and closing of the first switch 5 and the second switch 6 at each secondary winding, so that the transformation ratio of any current is flexibly adjusted.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A current proportioning device capable of adjusting transformation ratio comprises at least one magnetic core (2) and enameled wires uniformly wound on each magnetic core (2), and is characterized in that the enameled wires are wound on two sides of the magnetic cores (2) to form a primary winding (1) and a secondary winding combination respectively, wherein,
a primary winding (1) connected to a first tap (4) and to a primary main circuit (8) through said first tap (4);
and the secondary winding combination comprises a plurality of secondary windings (3), each secondary winding (3) is connected to a second tap (7) and is connected to a secondary main loop (9) through the second tap (7), a switch assembly is further arranged between each secondary winding (3) and the secondary main loop (9), and whether each secondary winding (3) is connected to the secondary main loop (9) in series or not is controlled through the opening and closing cooperation of the switch assembly.
2. The ratio-adjustable current proportioning device of claim 1, wherein: each of the switch assemblies comprises a first switch (5) and a second switch (6); each first switch (5) is connected in series with the secondary side main loop (9); each second switch (6) is connected with the corresponding secondary winding (3) in series and then connected with each corresponding first switch (5) in parallel.
3. The ratio-adjustable current proportioning device of claim 1, wherein: the number of turns of each secondary winding (3) ranges from 1 to 1000 turns.
4. The ratio-adjustable current proportioning device of claim 3, wherein: according to the principle of magnetic potential balance, the product of the primary current on the primary winding side and the number of turns of the primary winding and the product of the secondary current on the secondary winding side and the number of turns of the secondary winding are equal, that is
NP*IP＝NS*IS
Wherein N isPIs the number of turns of the primary winding (1), IPIs the current flowing through the primary side main loop (8); n is a radical ofSThe sum of the turns of all secondary windings (3) connected in series on the secondary main loop (9), ISIs the current flowing through the secondary side main loop (9);
while flowing throughCurrent I of primary side main loop (8)PWhen the current is not changed, the total number N of turns of all secondary windings (3) connected in series on the secondary main loop (9) is changedSTo control the current transformation ratio.
5. The ratio-adjustable current proportioning device of claim 1, wherein: the magnetic core (2) is a magnetic annular iron core, and the cross section of the annular iron core is rectangular.
6. The ratio-adjustable current proportioning device of claim 5, wherein: at least one layer of polyester film adhesive tape is wound on the surface of the annular iron core.
7. The ratio-adjustable current proportioning device of claim 2, wherein: the first switch (5) is a manual switch or a relay; the second switch (6) is a manual switch or a relay, and the first switch (5) and the second switch (6) at each secondary winding (3) are always in an open state and a closed state.
8. The ratio-adjustable current proportioning device of claim 7, wherein: the manual switch is a single-pole single-throw switch which is manually shifted, and the relay is controlled by a digital circuit of the single chip microcomputer.
9. The ratio-adjustable current proportioning device of claim 1, wherein: the enameled wire is internally made of pure copper materials and externally made of insulating materials.
10. A method for manufacturing a current proportion device with adjustable transformation ratio is characterized by comprising the following steps:
winding at least one layer of polyester film adhesive tape on the surface of the magnetic core (2) through a tape wrapping machine;
winding multiple turns of enameled wires on two sides of the magnetic core (1) through a winding machine to form a primary winding (1) and a plurality of secondary windings (3) respectively;
thirdly, connecting the primary winding (1) to a primary main loop (8) through a first tap (4), and connecting the plurality of secondary windings (3) to a secondary main loop (9) through a second tap (7);
fourthly, a switch assembly is arranged between each secondary winding (3) and the secondary main loop (9);
and fifthly, controlling whether each secondary winding (3) is connected in series to the secondary main loop (9) or not by controlling the on-off matching of the switch assembly when the current transformation ratio is adjusted.
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| CN203910500U (en) * | 2014-05-27 | 2014-10-29 | 江苏省电力公司南京供电公司 | Multistage on-load voltage regulation icing preventing transformer |
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| CN204884832U (en) * | 2015-08-26 | 2015-12-16 | 杭州佰盟智能开关有限公司 | Hybrid on -load voltage -regulating transformer |
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Application publication date: 20210521 |
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