CN201112036Y - Retardation coil capable of lowering temperature-rising and erratic current - Google Patents

Abstract

The utility model discloses a chock coil with the performance of reducing temperature rise and vortex flow, which comprises enameled-wire coil conductors winding on a magnetic core in mutual insulation way; the magnetic core is an inversed 'T' shape magnetic core base; a column of the magnetic core is positioned at the middle part of disk surface of the magnetic core base and is spirally wound at least one layer of enameled-wire coil and is sealed on the disk of the inversed 'T' shape magnetic core base by a cover of a tubular box; the electrode outgoing lines at the two ends of the coil are extended out from the groove mouth of the two ends of the bottom of the inversed 'T' shape base. By adopting the box type chock coil which consists of the inversed 'T' shape magnetic core and the cover of a tubular box, the volume of the chock coil with the performance of reducing temperature rise and vortex flow of the utility model is reduced, thus avoiding the interference to other electronic components caused by vortex flow of the prior art and the heat temperature effect caused by power consumption by vortex flow, and facilitating the temperature rise to be greatly reduced; even under the condition of powerful electric current passing through the coil when starting a computer main body MOS, the coil can work stably, which is capable of bearing current with high peak value and resists the electric magnetic interference (EMI) and the interference of other electronic components.

Description

Can reduce the choking-winding of temperature rise and eddy current

Technical field

The utility model relates to a kind of choking-winding that is mainly used in computer motherboard and ancillary equipment thereof.The utility model is described the choking-winding that relates to can also be used for ink-jet printer, photocopier, display monitor, mobile phone, wideband data machine, game machine, color TV, videocorder, video camera, microwave oven, lighting apparatus, automobile electronics etc.

Background technology

It is the common mode disturbances suppression device of magnetic core with the ferrite that choking-winding is one, and it is measure-alike by two, and the coil that the number of turn is identical is wound on the same ferrite toroidal magnetic core symmetrically, forms a four-terminal device.At present, the common of choking-winding that is applied on the computer motherboard is made up of toroidal core and the enamelled wire that is wrapped in toroidal core.The weak point of this choking-winding is easily to produce eddy current, and the power dissipation that eddy current produces easily makes the magnetic core temperature raise, and influences high frequency usefulness.When the 600KHz high frequency is above, circuit can't be worked.Anti-EMI electromagnetic interference performance is poor.Especially under big electric current, the temperature of magnetic core is up to 85 ℃, and the leakage field of generation can cause the usefulness of circuit to reduce.Its another weak point is that volume is big, and the space that takies mainboard is also big, and its choking-winding electromagnetic field that leaks is also big.

The utility model content

Technical problem to be solved in the utility model is to overcome the above-mentioned deficiency of existing choking-winding, provides that a kind of volume is little, good, the anti-current strength of high frequency usefulness big, can anti-EMI electromagnetic interference, the choking-winding that can reduce temperature rise and the eddy current electromagnetic field that leaks.

The purpose of this utility model can reach by following measure, a kind of choking-winding that can reduce temperature rise and eddy current, comprise, be wound on the enamelled wire winding wire on the magnetic core mutually insulated, it is characterized in that, described magnetic core is " ⊥ " shape magnetic core pedestal, the core post body is positioned at pedestal card middle part, at least be wound with the enamelled wire coil of one deck spiral surrounding on its magnetic core cylinder, and be contained in by a tubular box type cap seal on the chassis of described " ⊥ " shape magnetic core pedestal, the electrode outlet line at coil two ends stretches out from the notch at two ends, " ⊥ " shape magnetic core pedestal bottom.

Further, the intrinsic insulating trip of jointing end face insulating cement between the chassis of tubular box type lid and " ⊥ " shape magnetic core pedestal.Can adjust the anti-electric current effect and the current strength of choking-winding by the thickness that changes insulating trip.

Described " ⊥ " magnetic core shape pedestal and tubular box type lid are the FERRITE CORE with material.

Preferably, described " ⊥ " shape magnetic core and tubular box type lid can be special-shaped cube.

The utility model has following beneficial effect than prior art.

The utility model adopts " ⊥ " shape magnetic core and tubular box type lid to reduce the volume of choking-winding in conjunction with the box type choking-winding of forming, not only reduced the space that takies mainboard, improved the electric property of computer motherboard, also reduced eddy current loss, the consume of copper cash of coil and the copper loss of choke have been reduced, saved material, and can effectively resist EMI and disturb.Avoid prior art to produce interference and the eddy current dissipation power hot temperature effect of eddy current, the temperature rise of its generation is significantly reduced, can make mainboard not produce the temperature rise phenomenon, improve anti-current strength of mainboard and high frequency voltinism energy other electronic building brick.When coil flow through transient high-current, magnetic saturation did not appear in magnetic core.Even if powerful electric current is through coil during computer motherboard MOS switch open, coil also can stably be worked, and bears the hard intensity peak current, resists the interference of EMI electromagnetic interference and other electronic building brick, prevent leaking of choking-winding electromagnetic field, make high frequency usefulness hypervelocityization.Thereby solved the problem of temperature rise of prior art.Be wound on the lead on the coil magnetic core, and the mutually insulated of the insulating trip that is connected between tubular box type lid and " ⊥ " magnetic core shape pedestal, guaranteed that choking-winding at the turn-to-turn of instantaneous overvoltage effect lower coil puncture short does not take place.The change of insulating trip thickness can choking-winding the ring quantitative change of closing magnetic flux, adjust the anti-electric current effect and the current strength of choking-winding.The magnetic circuit monomer of " ⊥ " shape magnetic core is half-open flux structure, and the effect of closed magnetic circuit just can be arranged after must making up with tubular box type lid.The reliability height, the inductance value scope is big, the rated current height.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model decomposing schematic representation.

Fig. 2 is that Fig. 1 assembles fit schematic diagram.Fig. 3 is the choking-winding cross-sectional schematic of Fig. 2.

Embodiment

In the choking-winding shown in Fig. 1～3, adopt ferrite or ferromagnetic powder stamping forming " ⊥ " shape magnetic core pedestal 4 to have one by the base body card of intercepting two ends circular arc, have opening arc notch 6 on it.Notch 6 is not limited to the shape shown in the figure, can be rectangle or square notch.The core post body is positioned at pedestal card middle part.The enamelled wire coil 3 of spiral surrounding is wrapped on the magnetic core cylinder, and the outer surface of coil 3 is adhesively fixed on the magnetic core cylinder by bonding agent and its magnetic core medial surface.Coil 3 is the coiling individual layer as far as possible, does the parasitic capacitance that can reduce coil like this, and intensifier coil is to the ability to bear of instantaneous overvoltage.Also can be around two layers or multilayer enamelled wire on FERRITE CORE, skin is sealed varnish, epoxy resin or PVC/UL sleeve pipe.But around two layers or multilayer enamelled wire, can make coil produce parasitic capacitance, weaken the ability to bear of coil instantaneous overvoltage." ⊥ " shape magnetic core pedestal 4 that is wound with coil 3 is contained on the chassis by tubular flask cap seal, and assembling becomes integral box type spare 1 shown in Figure 2.The identical three-dimensional shape of the shape of this box type spare 1 described with it " ⊥ " shape magnetic core pedestal 4 special-shaped bases." ⊥ " shape magnetic core and tubular box type lid can be special-shaped cubes.Box type spare 1 can be ferrite or the ferromagnetic powder material with " ⊥ " shape magnetic core pedestal 4 homogeneous materials, can also be alloy material, the electrode outlet line that is contained in (alloy comprises alloy materials such as ferronickel molybdenum alloy, dilval, sendust) coil 3 two ends on " ⊥ " shape magnetic core pedestal 4 cylinders stretches out from the notch 6 at two ends, " ⊥ " shape magnetic core pedestal bottom.Between the chassis of tubular box type lid and " ⊥ " shape magnetic core pedestal, the insulating trip 7 of being fixedlyed connected by insulating cement is housed.Insulating trip 7 is adhesively fixed on the jointing end face of two magnets.Can adjust the anti-electric current effect and the current strength of choking-winding by the thickness that changes insulating trip.(annotate: the permeability that can change magnetic core by insulating trip reduces the initial inductance value of magnetic core $L=\frac{{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="Y20072017255700061.png"\; state="\{\{state\}\}">N</figure-callout>}}^2{\mathrm{\&mu;}}_0{\mathrm{\&mu;}}_e\mathrm{Ae}}{\mathrm{le}}=N^2{A}_L$ , the saturation flux density BS value of magnetic core is raise on year-on-year basis $I_{\mathrm{dc}}\left(\mathrm{Isat}\right)=\frac{\mathrm{Bs}.\mathrm{Ae}}{L/N}$ Yet magnetic circuit is different by the thickness of insulating trip and energy storage that produce is also different between its " ⊥ " shape magnetic core and the tubular box type lid $P_L=\frac{{\mathrm{<figure-callout\; id="2"\; label="LI"\; filenames="Y20072017255700061.png"\; state="\{\{state\}\}">LI</figure-callout>}}^2}{2}=\frac{L}{2}{(I_o+\frac{\mathrm{\&Delta;I}}{2})}^2,$ So change current's intensity)

Above-described only is preferred implementation of the present utility model; should be understood that; for the person of ordinary skill of the art; under the prerequisite that does not break away from the present utility model design; can also make some distortion and improvement; such as adopting the different materials material or not using the design of insulating trip, the design of these changes all should belong to protection range of the present utility model.

Claims (9)

1. choking-winding that can reduce temperature rise and eddy current, comprise, be wound on the enamelled wire winding wire on the magnetic core mutually insulated, it is characterized in that, described magnetic core is " ⊥ " shape magnetic core pedestal, the core post body is positioned at pedestal card middle part, at least be wound with the enamelled wire coil of one deck spiral surrounding on its magnetic core cylinder, and be contained in by a tubular box type cap seal on the chassis of described " ⊥ " shape magnetic core pedestal, the electrode outlet line at coil two ends stretches out from the notch at two ends, " ⊥ " shape magnetic core pedestal bottom.

2. the choking-winding that can reduce temperature rise and eddy current according to claim 1 is characterized in that: coil is assembled into one with " ⊥ " shape magnetic core, the intrinsic insulating trip of insulating cement between the chassis jointing end face of tubular box type lid and " ⊥ " shape magnetic core pedestal.

3. the choking-winding that can reduce temperature rise and eddy current according to claim 2 is characterized in that: " ⊥ " magnetic core shape pedestal and tubular box type lid are ferrite, ferromagnetic powder material or the alloy materials with material.

4. the choking-winding that can reduce temperature rise and eddy current according to claim 1 is characterized in that: described " ⊥ " shape magnetic core and tubular box type lid can be special-shaped cubes.

5. according to claim 1 or the 4 described choking-windings that can reduce temperature rise and eddy current, it is characterized in that: " ⊥ " shape magnetic core pedestal has one by the base body card of intercepting two ends circular arc, has opening arc notch (6) on it.

6. the choking-winding that can reduce temperature rise and eddy current according to claim 1 is characterized in that institute's coiling is the individual layer enamelled wire on magnetic core.

7. the choking-winding that can reduce temperature rise and eddy current according to claim 1 is characterized in that: the outer surface of coil is adhesively fixed on the magnetic core cylinder by bonding agent and its magnetic core medial surface.

8. the choking-winding that can reduce temperature rise and eddy current according to claim 1 is characterized in that: " ⊥ " shape magnetic core pedestal that is wound with coil is contained on the chassis by tubular flask cap seal, is assembled into integral box type spare (1).

9. the choking-winding that can reduce temperature rise and eddy current according to claim 8 is characterized in that: the identical three-dimensional shape of the shape of box type spare described with it " ⊥ " shape magnetic core pedestal abnormity base.

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