CN105405626A - Current transformer of high-power and medium-high frequency power supply and winding method - Google Patents
Current transformer of high-power and medium-high frequency power supply and winding method Download PDFInfo
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- CN105405626A CN105405626A CN201511019499.1A CN201511019499A CN105405626A CN 105405626 A CN105405626 A CN 105405626A CN 201511019499 A CN201511019499 A CN 201511019499A CN 105405626 A CN105405626 A CN 105405626A
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- 238000004804 winding Methods 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005538 encapsulation Methods 0.000 claims description 6
- 238000005476 soldering Methods 0.000 claims description 6
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000002386 leaching Methods 0.000 claims description 3
- 238000012805 post-processing Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000002966 varnish Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 description 8
- 230000006698 induction Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- H01F38/30—Constructions
-
- 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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- 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
- H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores
-
- 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
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
-
- 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
- H01F38/30—Constructions
- H01F2038/305—Constructions with toroidal magnetic core
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Transformers For Measuring Instruments (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention discloses a current transformer of a high-power and medium-high frequency power supply. The current transformer comprises a primary magnetic ring and a secondary magnetic ring. A primary magnetic ring secondary winding is wound onto the annular magnet of the primary magnetic ring. A secondary magnetic ring secondary winding is wound onto the annular magnet of the secondary magnetic ring. The two ends of a wire for winding the secondary magnetic ring secondary winding are provided with a load-side outgoing line of the current transformer of the high-power and medium-high frequency power supply. A wire for winding the primary magnetic ring secondary winding is wound onto the annular magnet of the secondary magnetic ring at a specified number of turns to form a secondary magnetic ring primary winding. The number of turns of the secondary magnetic ring primary winding is smaller than the number of turns of the primary magnetic ring secondary winding and the number of turns of the secondary magnetic ring secondary winding. The invention also provides a winding method for the current transformer of the high-power and medium-high frequency power supply.
Description
Technical field
The present invention relates to a kind of high-power medium-high frequency power supply Current Transformer and winding method.
Background technology
It is little that current sampling because of current transformer has power loss, wide frequency range, and signals revivification is good, and sampling loop and control loop are electrically upper isolates, the advantages such as price is low, is widely used in the sampling of medium-high frequency power supply, detection, control.Modern medium-high frequency induction heating technique has been widely used in the industry such as heat treatment, heat forged, is a not only energy-conservation but also advanced technology for environmental protection.Induction heating power is as the most important core component of induction heating equipment; can its job stability, reliability normally work most important to whole equipment; as detecting power work state in induction heating equipment; and participate in Energy control and the current transformer providing defencive function; its good stability, reliability are high, are the basic guarantees of induction heating equipment job stability, reliability and precision.
There are following two large defects in current transformer in the past, one is that the magnetic core of current transformer in the past generally adopts si fe alloy material, this si fe alloy material, there is low price, mechanical stress impact is little, the advantages such as saturation induction density is large, extensively at transformer, the elements such as current transformer use as magnetic core, but the loss under medium-high frequency of this material sharply increases, heating is serious, usual frequency of utilization is no more than 400Hz, be used on intermediate frequency equipment as haveed no alternative but, water-cooled to be added in inside, such volume often does very large, be difficult to adapt to present induction heating equipment volume little, the technical requirement that precision is high.Two is that the magnetic core of conventional current instrument transformer generally adopts a magnet ring, changes primary current, like this when primary current is very large by means of only a no-load voltage ratio, when secondary current is very little, the coiling number of turn of current transformer is just very many, then considers the punching of armature winding, and it is just larger that core volume selects, cause the volume of current transformer large, and due to the coiling number of turns many, winding impedance is large, and internal resistance is large, greatly reduce the precision of Current Mutual Inductance sensor, be difficult to the requirement meeting the high equipment of required precision.
Such as rated power is 300kW, operating frequency be 30kHz power supply uses maximum 1500/1 current transformer, its primary current 1500A, secondary current is 1A, operating frequency is 30kHz, if press conventional art, even adopt state-of-the-art grain-oriented Si steel sheet, still water-cooled will be added, manufacturing process is complicated, even if adopt Fe-based amorphous alloy to make magnetic core, but as adopted the pattern of a magnet ring, the volume of magnet ring is also very large, the actual coiling number of turns is many, as the current transformer that the turn ratio is 1500/1, armature winding is 1 circle, secondary winding will around 1500 circles on magnet ring, the result of such coiling is that the secondary winding impedance of coiling is large, internal resistance is large, the internal resistance of load resistance is had to increase for making up error, or the sectional area of the enamelled wire of increase coiling armature winding and secondary winding, so just limit the scope of application of instrument transformer.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of high-power medium-high frequency power supply Current Transformer is provided, its actual coiling number of turn is much smaller than turn ratio number, and coiling winding wire used is few, the internal resistance of winding is low, and certainty of measurement is high, can be used for the load resistance that resistance is less, sampled signal can directly be delivered on control board, participates in the control of power supply.Present invention also offers a kind of winding method of high-power medium-high frequency power supply Current Transformer, also can realize above-mentioned technical purpose.
A kind of technical scheme realizing above-mentioned purpose is: a kind of high-power medium-high frequency power supply Current Transformer, comprises elementary magnet ring, the toroidal magnet of described elementary magnet ring is wound with elementary magnet ring secondary winding,
This high-power medium-high frequency power supply Current Transformer also comprises secondary magnet ring, the toroidal magnet of described secondary magnet ring is wound with secondary magnet ring secondary winding, and the two ends of the wire of secondary magnet ring secondary winding described in coiling form the load-side lead-out wire of this high-power medium-high frequency power supply Current Transformer;
The wire of elementary magnet ring secondary winding described in coiling is by specifying that number of turn coiling is on the toroidal magnet of described secondary magnet ring, form secondary magnet ring winding, and the number of turn of a described secondary magnet ring winding is less than the number of turn of described elementary magnet ring secondary winding, and the number of turn of described secondary magnet ring secondary winding.
Further, the toroidal magnet of described elementary magnet ring and the toroidal magnet of described secondary magnet ring all adopt iron-base amorphous alloy material to make.
Further, the load-side lead-out wire of this high-power medium-high frequency power supply Current Transformer is connected by the load-side lead of soldering and this high-power medium-high frequency power supply Current Transformer.
Further, the internal diameter of the toroidal magnet of described secondary magnet ring is less than the internal diameter of the toroidal magnet of described elementary magnet ring.
Another technical scheme provided by the invention is: a kind of winding method of high-power medium-high frequency power supply Current Transformer, comprises the following steps:
Magnetic core optional step: the toroidal magnet of toroidal core as elementary magnet ring selecting the number of turn of the form factor of the maximum output voltage of area of section and secondary side, electric current, working power frequency and secondary winding to mate and the toroidal magnet of secondary magnet ring;
Wire optional step, selects wire diameter and allows maximum current density, and the wire that matches of this elementary magnet ring, this secondary magnet ring secondary side rated current is as the wire of coiling elementary magnet ring secondary winding, secondary magnet ring secondary winding;
Coiling step, on the toroidal magnet of described elementary magnet ring, the elementary magnet ring secondary winding of coiling, and by the wire of magnet ring secondary winding elementary described in coiling by specifying that number of turn coiling is on the toroidal magnet of described secondary magnet ring, form secondary magnet ring winding, the secondary magnet ring secondary winding of coiling on the toroidal magnet of described secondary magnet ring; The number of turn of a described secondary magnet ring winding is less than the number of turn of described elementary magnet ring secondary winding, and the number of turn of described secondary magnet ring secondary winding.
Further, the winding method of this high-power medium-high frequency power supply Current Transformer also comprises:
Joint fixing step, the two ends by the wire of magnet ring secondary winding secondary described in coiling are connected by the load-side lead of soldering and this high-power medium-high frequency power supply Current Transformer.
Further, the winding method of this high-power medium-high frequency power supply Current Transformer also comprises:
Post-processing step: leaching insulating varnish and drying and processing are carried out to described elementary magnet ring and described secondary magnet ring;
Encapsulation step: adopt primary side punching cast pattern, complete the encapsulation of this high-power medium-high frequency power supply Current Transformer.
Have employed one of the present invention high-power medium-high frequency power supply Current Transformer, comprise elementary magnet ring and secondary magnet ring, the toroidal magnet of described elementary magnet ring is wound with elementary magnet ring secondary winding, the toroidal magnet of described secondary magnet ring is wound with secondary magnet ring secondary winding, and the wire two ends of secondary magnet ring secondary winding described in coiling form the load-side lead-out wire of this high-power medium-high frequency power supply Current Transformer; The wire of elementary magnet ring secondary winding described in coiling is by specifying that number of turn coiling is on the toroidal magnet of described secondary magnet ring, form secondary magnet ring winding, and the number of turn of a described secondary magnet ring winding is less than the number of turn of described elementary magnet ring secondary winding, and the number of turn of described secondary magnet ring secondary winding.Its technique effect is: its volume is little, lightweight, and the actual coiling number of turn is much smaller than turn ratio number, and coiling winding wire used is few, the internal resistance of winding is low, and certainty of measurement is high, can be used for the load resistance that resistance is less, sampled signal can directly be delivered on control board, participates in the control of power supply.The technical scheme of the winding method of a kind of high-power medium-high frequency power supply Current Transformer of the present invention, also can reach above-mentioned technique effect.
Accompanying drawing explanation
The cut-away view of a kind of high-power medium-high frequency power supply Current Transformer of Fig. 1 the present invention.
The outline drawing of a kind of high-power medium-high frequency power supply Current Transformer of Fig. 2 the present invention.
Embodiment
Refer to Fig. 1, the present inventor, in order to understand technical scheme of the present invention better, below by embodiment particularly, and is described in detail by reference to the accompanying drawings:
One of the present invention high-power medium-high frequency power supply Current Transformer, comprise elementary magnet ring 1 and secondary magnet ring 2, the toroidal magnet of elementary magnet ring 1 is wound with elementary magnet ring secondary winding 12, the number of turn of elementary magnet ring secondary winding 12 is 30 circles, the toroidal magnet of secondary magnet ring 2 is wound with secondary magnet ring secondary winding 22, and the number of turn of secondary magnet ring secondary winding 22 is 50 circles.The wire of coiling elementary magnet ring secondary winding 12 is by specifying that number of turn coiling is on the toroidal magnet of secondary magnet ring 2, form secondary magnet ring winding 21, and the number of turn of a secondary magnet ring winding 21 is less than the number of turn of elementary magnet ring secondary winding 12 and the number of turn of secondary magnet ring secondary winding 22.In the present embodiment, the number of turn of a secondary magnet ring winding 21 is a circle.
Because secondary magnet ring secondary winding 22 adopts some enamelled wires, i.e. LITS wire-wound, therefore the two ends being wound on the wire of secondary magnet ring secondary winding 22 define the lead-out wire of secondary magnet ring 2, the i.e. load-side lead-out wire 23 of high-power medium-high frequency power supply Current Transformer, the load-side lead-out wire 23 of this high-power medium-high frequency power supply Current Transformer connects the load-side lead 4 of this high-power medium-high frequency power supply Current Transformer.
Elementary magnet ring 1 and secondary magnet ring 2 set up magnetic field contact by secondary magnet ring winding 21 in other words conj.or perhaps, elementary magnet ring secondary winding 12 will by the coiling of the regulation number of turn on the toroidal magnet of secondary magnet ring 2, as secondary magnet ring winding 21 on secondary magnet ring 2, on secondary magnet ring, coiling specifies that the number of turn is as secondary magnet ring secondary winding 22 again, and using the wire termination of secondary for coiling magnet ring secondary winding 22 as final load-side lead-out wire 23, be connected on the load-side lead 4 of high-power medium-high frequency power supply Current Transformer by soldering, on corresponding control board, sampled signal is gathered to facilitate.
One of the present invention high-power medium-high frequency power supply Current Transformer, adopt the secondary no-load voltage ratio winding technology of two magnet ring, adopt elementary magnet ring 1 and secondary magnet ring 2, through secondary no-load voltage ratio, around the elementary magnet ring secondary winding 12 of 30 circle on the toroidal magnet of elementary magnet ring 1, through thirtyfold no-load voltage ratio, if the electric current in elementary magnet ring winding (not shown) is 1500A, electric current on so elementary magnet ring secondary winding 12 and secondary magnet ring winding 21 has been exactly 50A, again through the secondary no-load voltage ratio of secondary magnet ring 2, secondary magnet ring winding 21 is circles, but secondary magnet ring secondary winding 22 is 50 circles, i.e. no-load voltage ratio 50 times, the electric current of secondary magnet ring secondary winding 22 becomes 1A, total coiling number of turn of secondary magnet ring secondary winding 22 and an elementary magnet ring winding only has 80 circles, far below 1500 circles wanting coiling during an employing magnetic core, obvious material and workload all will be lacked a lot, and the internal resistance of elementary magnet ring secondary winding 12 and secondary magnet ring secondary winding 22 is just much smaller, certainty of measurement is high, the resistance of load resistance can reduce, signal can directly be delivered on control board, participate in the control of power supply.
The magnetic core of to be cross section be 15mm × 12mm that the toroidal magnet of elementary magnet ring 1 adopts in the present embodiment, the material of magnetic core is Fe-based amorphous alloy, internal diameter, namely the diameter that cable penetrates hole 10 is 54mm, and the wire that elementary magnet ring secondary winding 12 and secondary magnet ring winding 21 adopt is the LITS line that wire diameter is about 5mm.
The magnetic core of to be cross section be 12mm × 10mm that the toroidal magnet of secondary magnet ring 2 adopts in the present embodiment, the material of magnetic core is Fe-based amorphous alloy, internal diameter, namely secondary cable penetrates the diameter in hole 20 is 16mm, and the wire that secondary magnet ring secondary winding 22 adopts is the LITS line being about 1.7mm by wire diameter.
In the present embodiment, elementary magnet ring 1 and secondary magnet ring 2 are after elementary magnet ring secondary winding 12, secondary magnet ring winding 21 and the coiling of secondary magnet ring secondary winding 22 complete, by cast, shape needed for formation, or employing is installed separately pattern, be arranged on a base plate 3, base plate 3 is provided with current transformer installing hole 31.
One of the present invention high-power medium-high frequency power supply Current Transformer, as the parts of on medium-high frequency power supply, samples the current signal of intermediate frequency power supply, detects, and realizes the control to intermediate frequency power supply.
A winding method for high-power medium-high frequency power supply Current Transformer, comprises the following steps:
Magnetic core optional step: the toroidal magnet of toroidal core as elementary magnet ring selecting the number of turn of the form factor of the maximum output voltage of area of section and secondary side, electric current, working power frequency and secondary winding to mate and the toroidal magnet of secondary magnet ring; The minimum cross-sectional area A of the toroidal magnet of elementary magnet ring 1 or the toroidal magnet of secondary magnet ring 2
ecomputing formula be:
V
sfor the maximum output voltage of elementary magnet ring 1 or secondary magnet ring 2 secondary side, unit V, is defined as 5V in the present embodiment.
K
ffor form factor, in the present embodiment, because the waveform of electric current is sinusoidal wave, so be defined as 1.44.
F
sfor power work frequency, unit Hz, the present embodiment is 30kHz.
N
sfor the number of turn of secondary winding.
B
tfor the magnetic flux density of toroidal core, unit T, the present embodiment is defined as 0.6.
The toroidal magnet of elementary magnet ring 1 calculates required minimum cross-sectional area 2mm
2, the minimum sectional area that the toroidal magnet of secondary magnet ring 2 calculates required magnetic core is 1mm
2consider the matching of elementary magnet ring secondary winding 12 and secondary magnet ring secondary winding 22 wire used and adapt to wider frequency range, the area of section of the toroidal magnet of elementary magnet ring 1 and the toroidal core selected by toroidal magnet of secondary magnet ring 2 is all much larger than the minimum cross-sectional area of theory calculate, and actual use is upper feasible.
Wire optional step, select wire diameter and allow maximum current density, and the wire that matches of elementary magnet ring 1 or secondary magnet ring 2 secondary side rated current is as the wire of coiling elementary magnet ring secondary winding 12, secondary magnet ring winding 21 and secondary magnet ring secondary winding 22, the minimum wire diameter D of wire
scomputing formula be:
Elementary magnet ring secondary winding 12 selects wire diameter to be the wire of 5mm, and secondary magnet ring secondary winding 22 selects wire diameter to be the wire of 1.5mm.
Coiling step, on the toroidal magnet of elementary magnet ring 1, the elementary magnet ring secondary winding 12 of coiling, and by the wire of elementary for coiling magnet ring secondary winding 12 by specifying that number of turn coiling is on the toroidal magnet of secondary magnet ring 2, form secondary magnet ring winding 21, the secondary magnet ring secondary winding 22 of coiling on secondary magnet ring 2 toroidal magnet; The number of turn of a secondary magnet ring winding 21 is less than the number of turn of elementary magnet ring secondary winding 12 and the number of turn of secondary magnet ring secondary winding 22.
Joint fixing step: the load-side lead-out wire 23 of this high-power medium-high frequency power supply Current Transformer, namely the two ends of the wire of coiling secondary magnet ring secondary winding 22 are connected by the load-side lead 4 of soldering and this high-power medium-high frequency power supply Current Transformer.
Post-processing step: leaching insulating varnish is carried out to elementary magnet ring 1 and secondary magnet ring 2, and drying and processing.
Encapsulation step: adopt primary side punching cast pattern, complete the encapsulation of this high-power medium-high frequency power supply Current Transformer.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (7)
1. a high-power medium-high frequency power supply Current Transformer, comprises elementary magnet ring, the toroidal magnet of described elementary magnet ring is wound with elementary magnet ring secondary winding, it is characterized in that:
This high-power medium-high frequency power supply Current Transformer also comprises secondary magnet ring, the toroidal magnet of described secondary magnet ring is wound with secondary magnet ring secondary winding, and the two ends of the wire of secondary magnet ring secondary winding described in coiling form the load-side lead-out wire of this high-power medium-high frequency power supply Current Transformer;
The wire of elementary magnet ring secondary winding described in coiling is by specifying that number of turn coiling is on the toroidal magnet of described secondary magnet ring, form secondary magnet ring winding, and the number of turn of a described secondary magnet ring winding is less than the number of turn of described elementary magnet ring secondary winding, and the number of turn of described secondary magnet ring secondary winding.
2. one according to claim 1 high-power medium-high frequency power supply Current Transformer, is characterized in that: the toroidal magnet of described elementary magnet ring and the toroidal magnet of described secondary magnet ring all adopt iron-base amorphous alloy material to make.
3. one according to claim 1 high-power medium-high frequency power supply Current Transformer, is characterized in that: the load-side lead-out wire of this high-power medium-high frequency power supply Current Transformer is connected by the load-side lead of soldering and this high-power medium-high frequency power supply Current Transformer.
4. one according to claim 1 high-power medium-high frequency power supply Current Transformer, is characterized in that: the internal diameter of the toroidal magnet of described secondary magnet ring is less than the internal diameter of the toroidal magnet of described elementary magnet ring.
5. a winding method for high-power medium-high frequency power supply Current Transformer, comprises the following steps:
Magnetic core optional step: the toroidal magnet of toroidal core as elementary magnet ring selecting the number of turn of the form factor of the maximum output voltage of area of section and secondary side, electric current, working power frequency and secondary winding to mate and the toroidal magnet of secondary magnet ring;
Wire optional step, selects wire diameter and allows maximum current density, and the wire that matches of this elementary magnet ring, this secondary magnet ring secondary side rated current is as the wire of coiling elementary magnet ring secondary winding, secondary magnet ring secondary winding;
Coiling step, on the toroidal magnet of described elementary magnet ring, the elementary magnet ring secondary winding of coiling, and by the wire of magnet ring secondary winding elementary described in coiling by specifying that number of turn coiling is on the toroidal magnet of described secondary magnet ring, form secondary magnet ring winding, the secondary magnet ring secondary winding of coiling on the toroidal magnet of described secondary magnet ring; The number of turn of a described secondary magnet ring winding is less than the number of turn of described elementary magnet ring secondary winding, and the number of turn of described secondary magnet ring secondary winding.
6. the winding method of a kind of high-power medium-high frequency power supply Current Transformer according to claim 5, is characterized in that: it also comprises:
Joint fixing step, the two ends by the wire of magnet ring secondary winding secondary described in coiling are connected by the load-side lead of soldering and this high-power medium-high frequency power supply Current Transformer.
7. the winding method of a kind of high-power medium-high frequency power supply Current Transformer according to claim 6, is characterized in that: it also comprises:
Post-processing step: leaching insulating varnish and drying and processing are carried out to described elementary magnet ring and described secondary magnet ring;
Encapsulation step: adopt primary side punching cast pattern, complete the encapsulation of this high-power medium-high frequency power supply Current Transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511019499.1A CN105405626A (en) | 2015-12-29 | 2015-12-29 | Current transformer of high-power and medium-high frequency power supply and winding method |
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| CN201511019499.1A CN105405626A (en) | 2015-12-29 | 2015-12-29 | Current transformer of high-power and medium-high frequency power supply and winding method |
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| CN105405626A true CN105405626A (en) | 2016-03-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782946A (en) * | 2016-08-31 | 2018-03-09 | 天津瑞能电气有限公司 | A kind of wind-power electricity generation frequency conversion device detection great current mutual inductor |
| CN108666118A (en) * | 2018-03-23 | 2018-10-16 | 中国电力科学研究院有限公司 | A kind of Multiple coil current transformer of same magnetic circuit and preparation method thereof |
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| CN205452028U (en) * | 2015-12-29 | 2016-08-10 | 无锡应达工业有限公司 | High frequency electric uses current transformer in source in high -power |
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|---|---|---|---|---|
| CN1397963A (en) * | 2002-08-16 | 2003-02-19 | 余湘权 | Current measuring device and method using current mutual inductor with high transforming ratio |
| EP1494033A1 (en) * | 2003-07-03 | 2005-01-05 | Danaher Motion Stockholm AB | Low power consuming current measurements for high currents |
| CN201213095Y (en) * | 2008-07-01 | 2009-03-25 | 江苏安科瑞电器制造有限公司 | Low-voltage current inductor having two groups of signal outputs |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782946A (en) * | 2016-08-31 | 2018-03-09 | 天津瑞能电气有限公司 | A kind of wind-power electricity generation frequency conversion device detection great current mutual inductor |
| CN108666118A (en) * | 2018-03-23 | 2018-10-16 | 中国电力科学研究院有限公司 | A kind of Multiple coil current transformer of same magnetic circuit and preparation method thereof |
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