CN2783498Y - Resonance inductor - Google Patents

Abstract

The utility model discloses resonance inductance includes magnetic core, skeleton and coil, and the magnetic core includes a center post and both sides post, and the centre of this center post and both sides post is equipped with the air gap, and the skeleton is equipped with hollow cylinder, and on the magnetic core was located to this cylinder cover, the coil was around locating on this cylinder, the cylinder of skeleton on be equipped with and fix spacer on the cylinder, this spacer divides the cylinder into the coiling interval and dodges the interval, the coil is around locating the coiling interval on, dodge the position that the interval corresponds to the air gap of magnetic core center post. Through the setting of spacer, can avoid the air gap of magnetic core center post when making the coil coiling to need not use middle separation sticky tape, the cost is reduced also does benefit to the heat dissipation of this resonance inductance inner coil and magnetic core simultaneously.

Description

Resonant inductance

[technical field]

The utility model relates to a kind of resonant inductance.

[background technology]

In existing power module, resonant inductance often occurs and lost efficacy and to cause the module can't operate as normal.Through inspection to resonant inductance, find that resonant inductance has the phenomenon of jaundice, serious the short circuit of resonant inductance internal layer turn-to-turn blackout also appears, cause resonant inductance not have inductance value, the lagging leg ZVS of phase shift bridge can't realize, module efficiency seriously reduces, and is by being reduced to about 90% greater than 92% normally, serious even cause the module aircraft bombing.Analyze the eddy current loss in the online bag of leakage field that its reason is air gap in the resonant inductance coil, cause the line bag overheated, the winding jaundice.

Fig. 1 is in order to address the above problem, the resonant inductance of the band air gap of designing, this resonant inductance comprises magnetic core 1 and coil 2, magnetic core 1 comprises a newel and two side columns, and the centre position of newel and two side columns is equipped with air gap, coil 2 is distributed in the both sides of newel air gap and the two ends up and down of close newel, isolates with isolating adhesive tape between two parts coil.By this set, make and formed three place's air gaps 3 on the magnetic core, make the volume of revealing magnetic field reduce, greatly improved the situation of the high-frequency alternating magnetic field 4 line of cut bags that leak, reduced eddy current loss.But still there is following shortcoming in this kind design: 1) need to increase the isolation adhesive tape between two groups of coils 2, so increased production cost; 2) because the part comparative heat of coil inside and close newel still for the air gap of dodging newel needs filler, thereby is unfavorable for the heat radiation of inductance Inside coil and magnetic core; 3) isolating adhesive tape may slide along newel, is unfavorable for controlling dodging precision.

[utility model content]

The purpose of this utility model is to provide a kind of resonant inductance that is beneficial to heat radiation and reduces production costs.

The purpose of this utility model is achieved in that this resonant inductance comprises magnetic core, skeleton and coil, magnetic core comprises a newel and two side columns, the centre of this newel and two side columns is provided with air gap, skeleton is provided with the cylinder of hollow, this cylinder is sheathed on the magnetic core, coil is set around on this cylinder, the cylinder of described skeleton is provided with the escapement that is fixed on the above-mentioned cylinder, this escapement is divided into cylinder the coiling interval and dodges the interval, coil is set around on the coiling interval, dodges the position of interval corresponding to the air gap of core center post.

Described escapement comprises at least two skeleton baffle plates that are provided with at interval.

Described skeleton baffle plate has two, dodges the interval and is formed between the inboard of this two skeletons baffle plate, and the coiling interval is formed at the outside of each skeleton baffle plate respectively.

Described skeleton is dodged the width that interval width is equal to or greater than the air gap of core center post.

Described escapement is provided with groove, and this groove is from the recessed setting of the apical margin of escapement.

Described coil distribution is in the both sides of the air gap of core center post, and the two ends up and down of close newel.

The line footpath of the lead of described coil is less than 0.42mm.

The described coil that is set around on the coiling interval is respectively main winding and auxiliary winding, this main winding and auxiliary winding and around.

Compared with prior art, the utlity model has following advantage: 1), can avoid the air gap of core center post when making coil winding, and need not use the intermediate isolating adhesive tape, reduce cost by the setting of escapement; 2) need not any filler because of the air gap part of avoiding the core center post, so also be beneficial to the heat radiation of this resonant inductance Inside coil and magnetic core; 3) setting of the groove by escapement, precision is dodged in tap and the control of being convenient to draw coil; 4) because the line of the lead of coil footpath less than 0.42mm, so can increase electromagnetic transmission capacity and reduce eddy current loss; 5) because main winding and auxiliary winding and around, so can reduce leakage inductance and reduce the temperature of winding.

[description of drawings]

Fig. 1 is the structure chart of the resonant inductance of prior art.

Fig. 2 is the overall structure figure of the utility model resonant inductance.

Fig. 3 is the overall structure figure of another angle of the utility model resonant inductance.

Fig. 4 is the structure chart of magnetic core of the present utility model.

Fig. 5 is the structure chart of skeleton of the present utility model.

Fig. 6 is the cutaway view of Fig. 5 along the A-A direction.

Fig. 7 is the cutaway view of Fig. 5 along the B-B direction.

[embodiment]

See also Fig. 2 to Fig. 4, the utility model resonant inductance comprises magnetic core 5, skeleton 6 and coil 7.Magnetic core 5 is " day " font frame structure, be formed by connecting (as connecting) by two " E " type magnetic core monomers 51 in fact by black glue, this magnetic core comprises a newel 52 and is positioned at two side columns 53 of these newel 52 both sides, and the centre position of described newel 52 and two side columns 53 all has air gap 54, setting by this air gap, greatly improve the situation of the high-frequency alternating magnetic field line of cut bag that leaks, reduced eddy current loss.

See also Fig. 5 to Fig. 7, skeleton 6 is sheathed on the newel 52 of magnetic core 5, and coil 7 is wrapped on the skeleton 6.These skeleton 6 middle positions are provided with a cylinder 61 for the coil winding.This cylinder 61 is the cylindrical-shaped structure of hollow, which is provided with the through hole 64 that runs through up and down, and the newel 52 of magnetic core 5 promptly passes this through hole 64, is provided with some wire casings 65 in the below of this cylinder 61, in order to locate each tap 71 of drawing on coil 7.The skeleton baffle plate 62 that the middle position of this cylinder 61 keeps at a certain distance away and is provided with two rounds, by this skeleton baffle plate 62 cylinder is divided into three intervals, these three intervals are respectively dodges interval 67 and is located at the coiling interval 66 that this dodges both sides about in the of 67, interval, this dodges the part that interval 67 promptly is positioned at two skeleton baffle plates, 62 centres, these two coiling interval 66 usefulness are for coil 7 coilings, and this dodges the position of interval 67 corresponding to the air gap 54 of core center post 52.In addition, on this skeleton baffle plate 62, be provided with groove 63, this groove 63 is to form from the recessed certain depth of the apical margin of skeleton baffle plate 62, exists certain height poor thereby make between the apical margin of the diapire 631 of groove 63 and skeleton baffle plate 62, and the sidewall 632 of this groove 63 promptly is equivalent to stage portion.In the present embodiment, the spacing between the two skeleton baffle plates 62 should be equal to or greater than the width of the air gap 54 of core center post 52.In addition, a plurality of skeleton baffle plates 62 can be set also on this skeleton 6, thereby cylinder 61 is divided into four or more interval.The cylinder 61 of skeleton 6 also can be a ladder post, and the middle part is provided with boss, and this boss is the skeleton baffle plate, the width that this boss should equal this air gap 54 at least corresponding to position and its width of magnetic newel air gap 54.Above-mentioned skeleton baffle plate forms escapement, and this escapement is divided into cylinder dodges interval and coiling interval.

By the setting of skeleton baffle plate 62, the air gap 54 of core center post can be avoided when making coil 7 coilings, and the intermediate isolating adhesive tape need not be used, reduced cost; Because of air gap 54 parts of avoiding the core center post need not any filler, so also be beneficial to the heat radiation of this resonant inductance Inside coil 7 and magnetic core 5; The setting of the groove 63 by skeleton baffle plate 62 and the sidewall 632 of this groove, precision is dodged in tap 71 and the control of being convenient to draw coil.

The above-mentioned coil that is set around in the two coiling intervals is defined as main winding and auxiliary winding respectively.When this main winding and auxiliary design of Windings, because there is kelvin effect in the lead of winding:

$\mathrm{\Δ}=\sqrt{\frac{2}{\mathrm{\ω}\×\mathrm{\μ}\×\mathrm{\γ}}}$ $=\sqrt{\frac{2}{2\×\mathrm{\π}\×f\×\mathrm{\μ}\×\mathrm{\γ}}}$

So the line of winding conducting wire footpath must be less than 2 Δs.Line footpath is thin more, and electromagnetic wave more can transmission, and eddy current loss is more little.The line footpath that can get winding conducting wire by experiment is less than 0.42mm, and effect is better.Simultaneously for leakage inductance that reduces this resonant inductance and the temperature that reduces winding, adopt auxiliary winding and main winding and around.

Claims (8)

1. resonant inductance, comprise magnetic core, skeleton and coil, magnetic core comprises a newel and two side columns, the centre of this newel and two side columns is provided with air gap, skeleton is provided with the cylinder of hollow, this cylinder is sheathed on the magnetic core, coil is set around on this cylinder, it is characterized in that: the cylinder of described skeleton is provided with the escapement that is fixed on the above-mentioned cylinder, this escapement is divided into cylinder the coiling interval and dodges the interval, coil is set around on the coiling interval, dodges the position of interval corresponding to the air gap of core center post.

2. resonant inductance as claimed in claim 1 is characterized in that: described escapement comprises at least two skeleton baffle plates that are provided with at interval.

3. resonant inductance as claimed in claim 2 is characterized in that: described skeleton baffle plate has two, dodges the interval and is formed between the inboard of this two skeletons baffle plate, and the coiling interval is formed at the outside of each skeleton baffle plate respectively.

4. resonant inductance as claimed in claim 1 is characterized in that: described skeleton is dodged the width that interval width is equal to or greater than the air gap of core center post.

5. as any described resonant inductance among the claim 1-4, it is characterized in that: described escapement is provided with groove, and this groove is from the recessed setting of the apical margin of escapement.

6. as any described resonant inductance among the claim 1-4, it is characterized in that: described coil distribution is in the both sides of the air gap of core center post, and the two ends up and down of close newel.

7. as any described resonant inductance among the claim 1-4, it is characterized in that: the line footpath of the lead of described coil is less than 0.42mm.

8. as any described resonant inductance among the claim 1-4, it is characterized in that: the described coil that is set around on the coiling interval is respectively main winding and auxiliary winding, this main winding and auxiliary winding and around.

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