Reactor iron core structure with rough bonding surfaces and process method of reactor iron core structure

Abstract

The invention discloses a reactor iron core structure with rough bonding surfaces and a production method of the reactor iron core structure. The reactor iron core structure comprises at least two silicon steel elements, wherein each silicon steel element comprises a plurality of laminated silicon steel sheets, gap plates are arranged among the silicon steel sheets, and the silicon steel elements are fixedly connected with the gap plates by adhesives. During practical use, bonding surfaces of the gap plates and the silicon steel elements are rough surfaces, more adhesives can be applied to the rough bonding surfaces, so that the gap plates and the silicon steel elements can be more stably connected, and the noise generated by displacement and vibration of core-column silicon steel sheets of a reactor in an alternating-current magnetic field is greatly reduced. The reactor iron core structure is ingenious, the bonding stability of the gap plates and the silicon steel elements is high, the production process is simple, product cost and volume are not increased, and the noise of the finished reactor can be permanently reduced.

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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