CN2508360Y

CN2508360Y - Iron-core filter reactor

Info

Publication number: CN2508360Y
Application number: CN 01263537
Authority: CN
Inventors: 张汝建
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-31
Filing date: 2001-10-31
Publication date: 2002-08-28
Anticipated expiration: 2011-10-31

Abstract

The utility model relates to an iron core filter reactor. The utility model consists of an iron core and a coil 2, the iron core consists of an upper iron core 1, a lower iron core 4, and an iron core upright column 3 arranged between the upper iron core and the lower iron core, and the coil 2 is sleeved on an iron core upright column 3. The utility model is characterized in that the iron core upright column 3 adopts the sectional folding of each layer 5, each section is separated with insulating material 6, the padding layer air gap of the iron core and the cross section of the iron core obtain the better matching, in this way, the linearity of the iron core is raised, and the loss is greatly reduced again; the coil 2 adopts the winding of a copper belt 10, the skin effect of a conductor is greatly reduced, the capacitance distributed between the turns and between the layers is greatly reduced, thereby the equivalent alternating current resistance of the reactor drops, and the quality factor of the reactor is enhanced.

Description

The iron core filter reactor

The utility model relates to a kind of iron core filter reactor.Belong to a kind of special transformer element.Be applicable to that mainly one suppresses special-purpose reactance component in the electric-power filter of mains by harmonics and the inductance element in other other circuit that need select high linearity, high Q value inductance element for use.

Present various iron core reactor kind and pattern are a lot, but the following deficiency of ubiquity:

1, its iron core column adopts whole folded system, and the range of linearity is narrow, and core loss is very big, so can't use in electric-power filter.

2, the material of its coil winding is enamelled wire or flat type copper wire, and surface area is little, makes the kelvin effect height of conductor, and turn-to-turn and interlayer distributed capacitance are big, make the equivalent AC resistance of reactor big, and quality factor are little, only are 5～8 under the test frequency of 1000Hz.

3, reactor generally adopts the insulating varnish impregnation process, and its shortcoming is that dielectric strength is low, and the work noise of reactor is big, generally at 50～60 decibels.

Therefore, can only select air core reactor for use in the filter at present.But the air core reactor volume is very big, and the area requirements that takes up space is very high, makes the filter installation volume very big.

The purpose of this utility model is to overcome above-mentioned shortcoming, provides a kind of high linearity low-loss iron core filter reactor.

The purpose of this utility model is achieved in that a kind of iron core filter reactor, comprise iron core and coil, iron core comprises upper core, lower core and places iron core column between upper and lower iron core, the coil cover is on the iron core column, be characterized in that the iron core column adopts the folded system of segmentation layer by layer, isolates with insulating material between every section.

Coil of the present utility model adopts the copper strips coiling.

Compare with existing iron core reactor, the utlity model has following advantage:

1, changes original iron core column into segmentation layer by layer folded system by the folded system of integral body, isolate with insulating material between every section, make the bed course air gap and the core section of iron core obtain best fit, thereby guarantee that inductance value remains in the linear zone under 3 times of rated current.Iron core can adopt the cordwood system type closed assembly.The linearity of iron core was risen, loss is reduced greatly, while simple installation, flexible design.

2, the material with primary coil coiling changes the copper strips coiling into by enamelled wire, flat type copper wire, like this, because the surface area of copper strips is much larger than enamelled wire or flat type copper wire with sectional area, make the kelvin effect of conductor reduce greatly, turn-to-turn and interlayer distributed capacitance reduce greatly, thereby the equivalent AC resistance of reactor is descended, improved the quality factor of reactor.Quality factor reach 45～55 under the test frequency of 1000Hz simultaneously.Risen about 10 times, thereby made iron core reactor can replace the air core reactor in the filter fully, made equipment manufacturing cost reduce, the installation volume drop by half, its economic benefit is fairly obvious.Because its temperature rise reduces greatly after having adopted above-mentioned several new technology, work noise reduces greatly, for environmental protection provides sound assurance simultaneously.

3, filter reactor adopts the epoxy resin sealing, and its dielectric strength increases, and operating noise reduces greatly, generally is no more than 45 decibels.

Fig. 1 is a front of the present utility model cut-away view.

Fig. 2 is the A-A cut-away view of Fig. 1.

Below in conjunction with accompanying drawing the utility model is described in further detail:

As Fig. 1～2, the utility model is a kind of iron core filter reactor.Form by iron core, coil 2 and upper and lower line bank 17,18 etc.

Iron core is by upper core 1, lower core 4 and place the iron core column 3 of 1,4 of upper and lower iron cores to form.Iron core column 3 is three among the figure.Iron core column 3 is by segmentation closed assembly and upper core 1, lower core 4 are formed cordwood system type closed assembly core structure layer by layer.5 on layer adopts insulating cell 6 to isolate with the air gap and the core section that guarantee magnetic circuit and obtains best fit.Upper core 1, lower core 4 and iron core column 3 both sides clamp with binding clip 12, and

grip

13,19 with fastening bolt 15, upper and lower iron and fix.The effect of binding clip is upper and lower iron core to be clamped with middle iron core column be connected, and guarantees that the air gap of iron core does not change because of transportation.Cover is shaped on insulation bushing pipe 16 and insulating bushing 14 on the bolt 15.Its effect be guarantee fastening bolt and following iron is gripped and last iron grip between unlikely short circuit and cause the loss of eddy current.

Coil 2 is sleeved on the iron core column 3, is formed by the coiling of multi-turn copper strips, and every circle is made up of coil rack 11, copper strips 10, layer insulation 9 and air channel skeleton 8.Copper strips 10 is wrapped on the coil rack 11, and layer insulation 9 is arranged on copper strips 10 peripheries, and its effect is that every layer of copper strips separated, and plays insulating effect.Air channel skeleton 8 places between every turn coil, and its effect is the air channel that every turn coil is separately formed a ventilation, guarantees heat radiation, the reduction temperature rise of whole reactor.Blue band outer edge line ring framework is sleeved on the iron core column 3, and the copper strips periphery of outmost turns coats external insulation layer 7.At last with epoxy resin with whole reactor flood, dry with improve reactor integral insulation intensity, reduce operating noise.

Claims

1, a kind of iron core filter reactor, comprise iron core and coil (2), iron core comprises upper core (1), lower core (4) and places iron core column (3) between upper and lower iron core, coil (2) cover is on iron core column (3), it is characterized in that iron core column (3) adopts the folded system of (5) segmentation layer by layer, isolates with insulating material (6) between every section.

2, a kind of iron core filter reactor according to claim 1 is characterized in that coil (2) adopts copper strips (10) coiling.

3, a kind of iron core filter reactor according to claim 1 is characterized in that whole filter reactor adopts the epoxy resin sealing.

4, a kind of iron core filter reactor according to claim 1 is characterized in that upper and lower iron core (1), (4) and iron core column (3) both sides clamp with binding clip (12).

5, a kind of iron core filter reactor according to claim 4, it is characterized in that between binding clip (12) and upper and lower iron core with fastening bolt (15), upper and lower iron grip (13), (19) are fixing.