Manufacturing process of rectangular nanocrystalline spraying magnetic core used in medium-high frequency environment

Abstract

The invention relates to the technical field of power transformers, and particularly discloses a manufacturing process of a rectangular nanocrystalline spraying magnetic core used in a medium-high frequency environment, which comprises the following specific process steps of 1, calculation, 2, winding, 3, preliminary shaping, 4, cooling: enabling the heated magnetic core to be subjected to air cooling treatment, and removing the tool, 5, performance improvement, 6, cooling: enabling the magnetic core subjected to heat treatment to be subjected to air cooling treatment, 7, soaking and solidifying, 8, drying, 9, removing the tool, 10, spraying, and 11, testing. The rectangular nanocrystalline spraying magnetic core manufactured through the process is not affected by mechanical stress any more, the magnetic performance is stable, medium-high frequency loss under high magnetic induction is low, and the spraying magnetic core has the advantages of being small in size and low in cost.

Description

technical field [0001] The invention relates to the technical field of power transformers, in particular to a manufacturing process for rectangular nanocrystal sprayed magnetic cores suitable for medium and high frequency environments. Background technique [0002] Nowadays, the application of magnetic cores is more and more extensive, the application environment is also more complex, the market demand is more precise, and the needs of customers for the performance and types of magnetic cores are more diverse. Compared with common types of magnetic cores, there are many special-shaped or precise The gap in the magnetic core market with higher precision is waiting for us to fill. The current production and application of nanocrystalline magnetic cores are mainly ring-shaped. The production process of the ring-shaped magnetic core is relatively simple and mature, and the performance is excellent, and the production period is short. However, the ring-shaped magnetic core can no...

AI Technical Summary

Problems solved by technology

The current production and application of nanocrystalline magnetic cores are mainly ring-shaped. The production process of the ring-shaped magnetic core is relatively simple and mature, and the performance is excellent, and the production period is short. However, the ring-shaped magnetic core can no longer perfectly adapt to changes in the application environment and customer needs. When When the power of the power transformer reaches an ultra-high power range of several hundred kilowatts or more, due to the requirements of current and installation methods, the magnetic core of the power transformer must be made into a rectangular shape. Therefore, it is urgent to develop special-shaped spraying that can more accurately meet customer needs magnetic core

[0003] At present, the rectangular magnetic cores on the market are mainly made of silicon steel. The silicon steel sheet cores produced by the rolling process have low resistivity and low effective permeability. They are mainly used in low-frequency scenarios such as transformers, reactors, and motors. High-frequency application scenarios There are more stringent requirements on the magnetic permeability and frequency / loss characteristics of the magnetic core. Obviously, the silicon steel magnetic core with lower resistivity cannot be applied, and the cost-effective tape-wound iron-based nanocrystalline magnetic core has better toughness, The performance is affected by stress, so it is difficult to set the shape. The existing process cannot produce a rectangular magnetic core with little influence of mechanical stress, no deformation under working temperature, and within the range of dimensional error under the premise of satisfying performance. Therefore, it is necessary to develop a specific The technological process makes the rectangular magnetic core no longer affected by mechanical stress, stable magnetic performance, low mid-high frequency loss under high magnetic induction, and different from the nanocrystalline magnetic core with a protective shell, the sprayed magnetic core has small size and low cost The advantages can be applied to high-power switching power supplies, inverter power supplies, magnetic amplifiers, high-frequency voltage transformers, high-frequency converters, high-frequency choke coil cores, current transformer cores, leakage protection switches, and common mode inductors. Electrical components in medium and high frequency environments such as cores

Images