CN109036825B

CN109036825B - Transformer inductance adjusting method of aviation ignition device

Info

Publication number: CN109036825B
Application number: CN201810810271.1A
Authority: CN
Inventors: 崔晓玉; 任燕; 杨西中; 卢治国; 池春霞; 张淑芬; 于涛
Original assignee: AECC Harbin Dongan Engine Co Ltd
Current assignee: AECC Harbin Dongan Engine Co Ltd
Priority date: 2018-07-20
Filing date: 2018-07-20
Publication date: 2022-01-14
Anticipated expiration: 2038-07-20
Also published as: CN109036825A

Abstract

The invention relates to a transformer inductance adjusting method of an aviation ignition device, which adjusts the inductance of a transformer by adjusting the gap between two half U-shaped iron cores. The invention avoids the defects in the original mode by the bonding method, can effectively and conveniently realize the adjustment of the inductance of the transformer, and ensures the use reliability of the aviation ignition device.

Description

Transformer inductance adjusting method of aviation ignition device

Technical Field

The invention relates to an inductance adjusting method, in particular to a transformer inductance adjusting method of an aviation ignition device, which realizes convenient adjustment of transformer inductance of a U-shaped iron core.

Background

The existing transformer adjusting method is to repair the magnetic pole in the middle of the magnetic core and change the gap between the two magnetic cores, thereby changing the inductance of the transformer. At present, in the field of aviation, the magnetic core material of a transformer of an aviation ignition device is changed into a U-shaped iron core formed by pressing a plurality of thin silicon steel strips with the thickness of 0.08mm from ferrite. Due to the change of materials, the use of the original filing method can cause the U-shaped iron core to rise due to over-thinness, generate scraps and change the performance, so the filing method is not suitable for adjusting the inductance of the U-shaped iron core transformer pressed by thin silicon steel strips. Meanwhile, the U-shaped silicon steel strip iron core has fixed overall dimension, fixed layers and compact press fitting, and the silicon steel thickness is too thin, so that the inductance cannot be adjusted by stripping the silicon steel strips with a certain number of layers. And because the transformer structure is that two half U-shaped iron cores are butted and stacked, the position, the size and the appearance of a transformer coil are different, the cutting amount of the U-shaped iron core cannot be accurately calculated, and therefore, the inductance cannot be adjusted by using a cutting processing method.

Disclosure of Invention

The invention aims to provide a transformer inductance adjusting method of an aviation ignition device, which aims at realizing the adjustment of the inductance of a transformer of a U-shaped iron core pressed by a thin silicon steel strip with the thickness of 0.08mm and ensuring the use requirement.

The specific technical scheme of the invention is that the transformer inductance adjusting method of the aviation ignition device comprises the following steps:

1) preparing: and (3) preparing the coil component 1, the U-shaped iron core 2 and the parallel clamp 3 with qualified quality, and dipping the absolute ethyl alcohol on silk to clean the end face of the U-shaped iron core 2 so as to ensure cleanness and no impurities.

2) Assembling: inserting one end of each of the two U-shaped iron cores 2 into a framework center hole of the coil component 1, then integrally installing the two U-shaped iron cores into the parallel clamp 3, aligning the end faces of the iron cores, and fastening parallel clamp screws to ensure that the two half iron cores are in butt joint neatly;

3) measurement: setting an LCR measuring instrument, and setting the test conditions to be 1kHz, 1.0V and Ls; clamping the start and end lead wire cores of the coil part in a test clamp of the LCR measuring instrument, aligning the core end faces, testing and recording the inductance value, and if the inductance value meets the design requirement, performing the step 5), otherwise, performing the next step;

4) adjusting: removing the parallel clamp, removing the two U-shaped iron cores 2, respectively adhering a 6240 polyimide film adhesive tape on each of two end faces of one U-shaped iron core 2, and repeating the steps 2) -3) until the inductance value meets the design requirement;

5) bonding: after the inductance of the transformer meets the requirement, the joint of the U-shaped iron core 2 is glued by J39 glue, and the room temperature curing is not less than 1 h;

6) and (4) final inspection: and taking down the parallel clamp, and finally measuring the inductance.

The inductance of the transformer is adjusted by adjusting the gap between the two half U-shaped iron cores, and because the more layers of 6240 polyimide film adhesive tapes are arranged in a certain range, the larger the iron core gap is, the smaller the inductance is, and the higher the ignition frequency of the transformer is. The invention avoids the defects in the original mode by the bonding method, can effectively and conveniently realize the adjustment of the inductance of the transformer, and ensures the use reliability of the aviation ignition device.

Drawings

Fig. 1 is a schematic view of the mounting structure of the present invention.

Detailed Description

As shown in the figure, the transformer inductance adjustment method of the aviation ignition device comprises the following steps:

Examples

The iron core of the aviation ignition transformer is formed by pressing a U-shaped iron core formed by pressing a plurality of thin silicon steel strips with the thickness of 0.08mm, the inductance of the transformer after assembly is required to be 300 +/-20 mu H, and the specific installation and adjustment method is as follows:

1) preparing: and (3) preparing a coil component, a U-shaped iron core and a parallel clamp with qualified quality, and dipping the absolute ethyl alcohol by silk cloth to clean the end surface of the U-shaped iron core 2 so as to ensure cleanness and no impurities.

2) Assembling: inserting one ends of the two U-shaped iron cores into a framework center hole of the coil component, then integrally installing the two U-shaped iron cores into a parallel clamp, aligning the end faces of the iron cores, and fastening a parallel clamp screw to ensure that the two half iron cores are in butt joint neatly;

3) measurement: setting an LCR measuring instrument, and setting the test conditions to be 1kHz, 1.0V and Ls; then clamping the start and end lead wire cores of the coil component in a test clamp of the LCR measuring instrument, aligning the core wire cores with the end face of the iron core, testing and recording the inductance value, wherein the inductance value is 2mH, and carrying out the next step;

4) adjusting: removing the parallel clamp, taking down the two U-shaped iron cores, respectively adhering a layer of 6240 polyimide film adhesive tape on two end faces of one U-shaped iron core, and then repeating the steps 2) to 3), wherein the inductance is 793 mu H;

removing the parallel clamp, taking down the two U-shaped iron cores, respectively adhering a layer of 6240 polyimide film adhesive tape on two end faces of one U-shaped iron core, and then repeating the steps 2) to 3), wherein the inductance is 793 mu H;

removing the parallel clamp, taking down the two U-shaped iron cores, respectively adhering a layer of 6240 polyimide film adhesive tape on two end faces of one U-shaped iron core, and then repeating the steps 2) -3), wherein the inductance is 496 muH;

removing the parallel clamp, taking down the two U-shaped iron cores, respectively adhering a layer of 6240 polyimide film adhesive tape on two end faces of one U-shaped iron core, and then repeating the steps 2) to 3), wherein the inductance is 299 mu H;

5) bonding: after the inductance of the transformer meets the requirement, the U-shaped iron core butt joint part is glued by J39 glue, and the transformer is cured for 1 hour at room temperature;

6) and (4) final inspection: taking down the parallel clamp, and finally measuring inductance: the inductance is 299 muH, which meets the requirement.

Claims

1. A transformer inductance adjusting method of an aviation ignition device is characterized by comprising the following steps:

1) preparing: preparing a coil component (1), a U-shaped iron core (2) and a parallel clamp (3) with qualified quality, dipping anhydrous ethanol by silk cloth to clean the end face of the U-shaped iron core (2) and ensure cleanness without impurities, wherein the U-shaped iron core (2) is formed by pressing a plurality of thin silicon steel strips with the thickness of 0.08 mm;

2) assembling: inserting one end of each of the two U-shaped iron cores (2) into a framework center hole of the coil component (1), then integrally installing the two U-shaped iron cores into the parallel clamp (3), aligning the end faces of the iron cores, and fastening parallel clamp screws to ensure that the two half iron cores are in butt joint neatly;

4) adjusting: removing the parallel clamp, taking down the two U-shaped iron cores (2), respectively adhering a layer of 6240 polyimide film adhesive tape on two end faces of one U-shaped iron core (2), and repeating the steps 2) to 3) until the inductance value meets the design requirement;

5) bonding: after the inductance of the transformer meets the requirement, the joint of the U-shaped iron core (2) is glued by J39 glue, and the room temperature curing is not less than 1 h;