Reactor core structure with rough bonding surface and production method thereof

Abstract

The invention discloses a reactor core structure with a rough bonding surface and a production method thereof, comprising at least two silicon steel parts, the silicon steel parts are composed of a plurality of stacked silicon steel sheets, and air gaps are arranged between the silicon steel parts The board and the silicon steel part are fixedly connected with the air gap board by adhesive. In practical application, the bonding surface of the air gap plate and the silicon steel part is a rough surface, and more adhesive can be applied on the rough bonding surface, so that the connection between the air gap plate and the silicon steel part can be more stable, which greatly reduces the The noise generated by the displacement and vibration of the core silicon steel sheet of the reactor in the alternating magnetic field. The invention has ingenious structure, strong bonding stability between the air gap plate and silicon steel parts, simple production process, and can achieve permanent reduction of the noise of the finished reactor without increasing product cost and volume.

Description

technical field [0001] The invention relates to the field of reactors, in particular to a reactor core structure with a rough bonding surface and a production method thereof. Background technique [0002] In modern industry, as an indispensable and important component in the field of power electronics, iron core reactors are widely used in harmonic suppression circuits or power compensation circuits of power transmission grids, and are also widely used in electric locomotives, marine ships, new energy, Filter circuits, resonant circuits or current limiting circuits in UPS and other fields. In practical applications, the current flowing through the core reactor is not only a 50Hz or 60Hz sine wave current, but often contains rich harmonics (150Hz~2kHz), high frequency modulation waves (1kHz~20kHz), etc. Due to the structure of the iron core reactor and its application limitations, the reactor will produce various noises, abnormal sounds, vibrations, etc. in actual work, whic...

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Problems solved by technology

However, this technology has the following disadvantages: 1. The air-gap plate is made of ceramic, glass or epoxy plate, etc. The surface of the air-gap plate is smooth and the bonding effect is poor. It is difficult to ensure that the epoxy glue can continuously laminate the silicon steel sheet and the air-gap plate. Form a firm bond and survive the cumulative cold and heat shocks in the actual work of the product; 2. When the temperature of the epoxy or acrylic adhesive used for bonding changes alternately, the adhesive performance will decrease, especially in high temperature environments In this case, the adhesive will soften, and the noise of the reactor will increase significantly; 3. The processing technology is cumbersome. The laminated silicon steel is first dipped in paint and cured, and then the end is used to remove the paint with specific equipment, and then coated with epoxy glue to cure. The final product is dipped in paint as a whole

4. Since each silicon steel part is first cured with insulating paint, the shape of each silicon steel part can no longer be changed. If there is a silicon steel part that is not an absolute cube, the entire core column cannot be fastened and flat, which will cause a sharp increase in product noise

5. In order to accommodate more epoxy glue, the end face of the iron core adopts a structure with different heights of silicon steel sheets, which increases the difficulty of processing the iron core; at the same time, at the air gap of the reactor, the magnetic flux will concentrate from the long The silicon steel sheet circulates, so that the magnetic density at the air gap is uneven, and the magnetic density of the long silicon steel sheet is doubled. At this time, the noise of the product will increase.

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