Is the higher the high-frequency inductance of the ultramicrocrystalline transformer, the better?

Materials such as ultramicrocrystalline magnetic cores, ferrite magnetic cores, and sendust are the core components of transformers and inductors. the

Ultrafine crystal cores, also called nanocrystalline cores, have the following characteristics:

1. Very high initial magnetic permeability, μ=30,000 to 80,000, and the change of magnetic permeability with magnetic flux density and temperature is very small;

2. The magnetic core loss is extremely low, and it does not change with the temperature in the range of -40 ~ +120 ℃;

3. Very high saturation magnetic flux density (BS=1.2T), allowing to choose a lower switching frequency, which can reduce the cost of switching power supply and EMI filter;

4. The magnetic core is packaged with epoxy resin, which has high mechanical strength, no hysteresis, and can withstand strong vibration;

5. It can replace the traditional ferrite core to reduce the volume of switching power supply and improve reliability. the

In fact, the working principle of the inductor is the same. The energy storage inductor means that in addition to freewheeling, it also has the function of energy storage. The inductance is generally relatively large. Above the mH level, ferrite, amorphous, nanocrystalline, etc. can be used. A material with a relatively high sensitivity value. The filter inductor mainly filters high-frequency components, and the inductance is relatively small, uH level. Due to the small inductance and limited energy storage, it is not called energy storage inductance. Higher Bs such as ferrite and sendust can be used. Ferrite material is the best choice for high frequency!

Nanocrystalline (ultracrystalline) is used in common mode inductors, open and closed loop current transformers, inverter air conditioners, Hall sensors, switching transformers, etc.; when applied to common mode inductors, nanocrystalline high frequency, high magnetic permeability and high impedance Ferrite and sendust have more advantages, but the price will be slightly higher than the latter two. Permalloy is used in open and closed loop current transformers, zero-sequence transformers, Hall sensors, audio transformers, electromagnetic shielding, etc. When applied to current transformers, Permalloy is better than nanocrystalline in terms of small current and high precision. Advantages, but the price will also be higher. the

Amorphous is used in reactors, power transformers, choke inductors, Hall sensors, amorphous motors, etc. The application performance is better than that of silicon steel, the loss is smaller, and the cost gap has been narrowed. Ferrite is used in common-mode inductor filters, differential-mode inductors, transformers, R rods, etc. As a traditional material for common-mode inductors, many engineers are accustomed to using it, but there is a bottleneck in high-performance miniaturization, and nanocrystals have obvious advantages. Senus is used in switching power supplies for energy storage and filter inductor cores, PFC input and output inductors, line filters, uninterruptible power supply equipment, reactors for large-scale power factor correctors, and traction inverters for renewable energy , PFC inductors, resonant inductors, solar energy, wind power inverters, PFC inductors, choke inductors, fast high-current electric vehicle inverters, switching current chokes, automotive ABS control systems, household car generators, In many fields such as inverter air conditioners, the application has become more and more popular.