High Permeability Permalloy Core For Current Transformer

Permalloy refers to an iron-nickel alloy with a wide range of nickel content, ranging from 35% to 90%. The biggest feature of Permalloy is its high magnetic permeability in weak magnetic fields. Their saturation magnetic induction intensity is generally between 0.6-1.0T. The simplest permalloy is an alloy composed of two elements: iron and nickel. Through proper rolling and heat treatment, they can have high magnetic permeability. At the same time, they can reasonably match the content of iron and nickel to obtain relatively high saturation magnetic induction. However, this permalloy has low resistivity and poor mechanical properties, so there are not many practical applications. Permalloy is essentially an iron-nickel (FeNi) alloy with very low coercivity, while the saturation magnetic density Bs, permeability and Curie temperature are all high, close to pure iron. Multi-element permalloy, the initial relative permeability can reach 30,000 to 80,000, but the resistivity is low, about 10-7Ω-m, it can be processed into very thin slices, so it can be used up to (20-30) kHz working frequency. Permalloy thin strips with a thickness of 0.02mm are commonly used in domestic engineering, and there are also 0.005mm thick thin strips. However, due to the insulation of the surface of the thin strip during the winding process of the magnetic core, its filling factor is greatly reduced, so in engineering rarely use. When the application frequency exceeds 30kHz, due to the low resistivity of permalloy, its loss will increase significantly.

3.Features
1).Low coercivity and magnetic hysteresis loss;
2).High resistivity and loweddy-currentloss;
3).High initialmagnetic permeability and maximum magnetic permeability;
4).High saturation magnetic flux density;

Parameters

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HEMEI is a leading manufacturer of electromagnetic signal coupling, the domestic designer and manufacturer of magnetoelectric power conversion technology, has been committed to promoting the progress of signal coupling technology and passive power technology. The main products are magnetic coupling amplifiers, wave traps, power carrier signal coupling transformers, permalloy cores, electromagnetic loop coils, CT power supply, open and close current transformers and other products. Products are widely used in smart home appliances, energy management systems, smart meter reading systems, smart monitoring equipment, smart distribution equipment, etc. We are the supplier of Qualcomm, Huawei Hisilicon, ST Microelectronics, In addition, Permalloy and electromagnetic core products have the largest market share in the power distribution industry of the State Grid.

This power suply CT device is our newly developed product, which can used on 100V-220kv AC transmission line, the new product can be used as a continuously and stabely power supply device. Hemei also offer customers personal services contains OEM, ODM and OPM. We welcome sample order to test and check quality.