CN204360891U - A kind of EI iron core with air gap - Google Patents

Abstract

The utility model provides a kind of EI iron core with air gap, comprise E body and I body, it is characterized in that, described E body comprises a base plate, one middle core body and two side bars, described middle core body is short compared with two side bars, and two, the left and right rib of described middle core body upper surface arranges chamfering, described E body and I body match, and described E body and I physically respectively have two location holes.Described middle core body is than the short 1-3mm of two side bars, beam-ends face, described both sides and I body bottom surface be affixed and, space is there is between described middle core body and I body, described location hole is arranged on the both sides of I body and base plate, the center of described location hole is arranged on apart from two 8-9mm places, vertical sideline, the diameter of described location hole is 4-8mm, adopt said structure can avoid producing magnetic saturation phenomenon, reduce the remanent magnetism of iron core when coil current reduces to zero, simultaneously, core body is provided with chamfering, is scraped off when can prevent coil from placing.

Description

A kind of EI iron core with air gap

Technical field

The utility model relates to the iron core of transformer, is specifically related to a kind of EI iron core with air gap.

Background technology

EI type silicon steel sheet also known as shell mould or day type silicon steel sheet, its major advantage is primary and secondary coil same coil holder altogether, has higher window occupation efficiency (occupation efficiency Km: copper cash net section sum window area than); Silicon steel sheet forms protecting sheathing to winding, makes winding not be vulnerable to mechanical hurt wound; Silicon steel sheet area of dissipation is comparatively large simultaneously, and transformer magnetic field is dispersed less.But, under interchange large-signal or direct current biasing, there will be magnetic saturation phenomenon, simultaneously, iron core works and produces more remanent magnetism under the state of dissymmetrical magnetic field, affects power output, when coil assembles, iron core is too sharp-pointed, easily scratch the insulating barrier of coil, generally solve this problem by iron core of polishing before assembly, so, not only increase workload, and polishing degree is difficult to unified.

Utility model content

For this reason, the utility model provides a kind of EI iron core with air gap, can realize the magnetic saturation phenomenon avoiding producing this type of, reduces the remanent magnetism of iron core when coil current reduces to zero.

Above-mentioned purpose of the present utility model and other objects solve by the following technical programs:

A kind of EI iron core with air gap, comprise E body and I body, it is characterized in that, described E body comprises a base plate, one middle core body and two side bars, described middle core body is short compared with two side bars, and two, the left and right rib of described middle core body upper surface arranges chamfering, described E body and I body match, and described E body and I physically respectively have two location holes.

A kind of EI iron core with air gap that the utility model provides, preferably, described middle core body than the short 1-3mm of two side bars, beam-ends face, described both sides and I body bottom surface be affixed and, there is space between described middle core body and I body.

A kind of EI iron core with air gap that the utility model provides, preferably, described location hole is arranged on the both sides of I body and base plate, and the center of described location hole is arranged on apart from two 8-9mm places, vertical sideline, and the diameter of described location hole is 4-8mm.

A kind of EI iron core with air gap that the utility model provides, preferably, described chamfer dimesion is 0.5mm.

After adopting the utility model, can avoid exchanging the magnetic saturation phenomenon under large-signal or direct current biasing, control inductance value better, under the condition not affecting iron core characteristic originally, the magnetic flux density of increasing work and saturation flux density, can reduce the remanent magnetism of iron core when dissymmetrical magnetic field operation simultaneously, when assembling, chamfering on middle core body well protects coil, prevents coil from scratching; Have no-load loss little, power output is large, the advantage that efficiency is high, temperature rise is low.

Accompanying drawing explanation

Carry out describing in detail or preferably to preferred implementation of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is that the utility model is separated schematic diagram;

Fig. 2 is the utility model front view;

Fig. 3 is the utility model entirety laminating schematic diagram.

Embodiment

With reference to above accompanying drawing, a kind of EI iron core with air gap that the utility model provides, comprise E body 2 and I body 1, it is characterized in that, described E body 2 comprises the middle core body 23 of a base plate 21, one and two side bars 22, described middle core body 23 is short compared with two side bars 22, two, the left and right rib of described middle core body 23 upper surface arranges chamfering 230, and described E body 2 and I body 1 match, and described E body 2 and I body 1 respectively have two location holes 3.

Preferably, the short 2mm of described middle core body 23 to two side bar 22, described two side bar 22 end faces and I body 1 bottom surface be affixed and, preferential employing gummed, space 4 is there is between middle core body 23 and I body 1, described space 4 can not affect under iron core characteristic prerequisite originally, and strengthens magnetic flux density and the saturation flux density of work, secondly, remanent magnetism when iron core works under the state of dissymmetrical magnetic field can be reduced in described space 4, and air gap is larger, when coil current reduces to zero, the remanent magnetism of iron core is less, the iron core of so same volume just can export larger power, but the inductance coefficent of the larger iron core of air gap is less, the more coil of coiling is just needed in order to reach certain inductance value, relevant copper loss also increases, add that coil turn is many, distributed capacitance also increases relatively, affect the job stability of electromagnetic component, therefore in many ways weigh during practical application, the optimum value determining described space 4 size is 2mm.

Preferably, the center of described location hole 3 is arranged on apart from two 8.75mm places, vertical sideline, and diameter is 6mm, and described location hole 3 under the prerequisite as far as possible reducing core loss, can make to there will not be relative sliding during iron core assembly, ensure that the precision of installation.

Preferably, described chamfering 230 is of a size of 0.5mm × 45 °, and chamfer dimesion should be not excessive, try one's best and not reduce iron core transverse sectional area, ensures power output, and described chamfering 230 can protect coil covering not to be subject to scratch when assembling, and prevents coil exposed.

In use, by location hole 3, bolt is used to connect, several described E type body 2 and I type body 1 are fitted and connected separately side by side, then coil is embedded the middle core body 23 on E type body 2, ensure there is no relative motion between coil and core body, finally the I type body integrated and E type body are glued together.

Above-described is only preferred implementation of the present utility model.It should be pointed out that for the person of ordinary skill of the art, under the prerequisite not departing from the utility model principle, can also make some distortion and improvement, these also should be considered as belonging to protection range of the present utility model.

Claims (4)

1. the EI iron core with air gap, comprise E body (2) and I body (1), it is characterized in that, described E body (2) comprises a base plate (21), one middle core body (23) and two side bars (22), comparatively two side bars (22) are short for described middle core body (23), and two, the left and right rib of described middle core body (23) upper surface arranges chamfering (230), described E body (2) and I body (1) match, and described E body (2) and I body (1) respectively have two location holes (3).

2. a kind of EI iron core with air gap according to claim 1, it is characterized in that: described middle core body (23) 1-3mm shorter in two side bars (22), described two side bars (22) end face and I body (1) bottom surface be affixed and, there is space (4) between described middle core body (23) and I body (1).

3. a kind of EI iron core with air gap according to claim 1, it is characterized in that: described location hole (3) is arranged on the both sides of I body (1) and base plate (21), the center of described location hole (3) is arranged on apart from two 8-9mm places, vertical sideline, and the diameter of described location hole (3) is 4-8mm.

4. a kind of EI iron core with air gap according to claim 1, is characterized in that: described chamfering (230) is of a size of 0.5mm × 45 °.