Advanced Magnetic Iron Silicon Boron Alloy Toroidal Core

Magnetic Iron Silicon Boron Alloy Toroidal Core Product Description

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Core Material Properties

Iron-silicon-boron alloys are mostly amorphous or nanocrystalline in structure, differing from the crystalline structure of traditional silicon steel, which gives them unique properties:

 

High Saturation Magnetic Flux Density: It can withstand stronger magnetic fields without being "saturated". It can conduct more magnetic energy under the same volume, which helps reduce the core size and achieve equipment miniaturization.

 

Extremely Low Magnetic Loss: Under high-frequency alternating magnetic fields, hysteresis loss and eddy current loss are much lower than those of silicon steel and ordinary soft iron. It is especially suitable for high-frequency scenarios, which can reduce heat generation and improve equipment energy efficiency.

 

Good Magnetic Permeability: It has high efficiency in conducting magnetic fields and can respond quickly to changes in magnetic fields. It is suitable for scenarios requiring precise magnetic signal conversion, such as sensors and precision inductors.

 

Additional Advantages of the Toroidal Structure

Based on the iron-silicon-boron alloy, the toroidal structure further optimizes its performance:

Complete Magnetic Circuit: The toroidal closed structure has no seams or very few seams, avoiding sudden changes in magnetic resistance at the seams of traditional laminated cores, reducing magnetic energy leakage, and improving magnetic circuit efficiency.

 

Low Vibration and Noise: The toroidal structure has strong mechanical stability, with small vibration amplitude under the action of magnetic fields. The noise during operation is much lower than that of non-toroidal cores, making it suitable for scenarios with high quietness requirements (such as medical equipment and precision instruments).

 

Good Consistency: The toroidal winding or forming process ensures uniform material distribution in all parts of the core, with high consistency in magnetic properties, avoiding the impact of local performance differences on the overall stability of the equipment.

 

Magnetic Iron Silicon Boron Alloy ring Core Application 

With the combination of "high performance + toroidal structure", this type of core mainly targets mid-to-high-end demand scenarios:

High-Frequency Power Electronics Field: Such as on-board chargers (OBC) for new energy vehicles, high-frequency inverters, and switching power supplies. It uses its low high-frequency loss characteristics to improve power conversion efficiency.

 

Precision Electronic Components Field: Used in high-frequency inductors, chokes, and current sensors. Relying on high magnetic permeability and low loss, it ensures the accuracy of signal conversion and reduces interference.

 

Special Power Equipment Field: Such as high-frequency transformers and reactors, which are suitable for scenarios with strict requirements on energy efficiency, volume, and noise (such as aerospace equipment and medical imaging equipment).

 

Core Differences from Common Toroidal Cores

Compared with the previously mentioned silicon steel toroidal cores and soft iron toroidal cores, its performance positioning is more high-end. The specific differences are as follows:

 

Material and Structure: Iron-silicon-boron alloys are mostly amorphous/nanocrystalline; silicon steel has a crystalline structure, and soft iron is mostly pure iron or low-carbon steel (with a crystalline structure).

 

Key Performance: Iron-silicon-boron alloys have significant advantages in saturation magnetic flux density and low high-frequency loss; silicon steel has high cost-effectiveness in medium and low-frequency scenarios; soft iron has low cost but high high-frequency loss.

 

Applicable Scenarios: Iron-silicon-boron toroidal cores focus on high-end high-frequency and miniaturized scenarios; silicon steel toroidal cores are mostly used in medium and low-frequency power equipment; soft iron toroidal cores are used in low-frequency scenarios with low performance requirements.

ring core specification

Magnetic core size(mm)			Protective box size(mm)			Effective cross-sectional area Ae(mm2)		Magnetic path length Ie(mm)		Maximum DC overcurrent class (A)
id	od	ht	ID	OD	HT
14	19	6.5	12	22	8	11.86		51.81		20
14	20	10	12	22.3	11.4	29.68		52.29		40
16	21	10	15	24	12.3	24.85		57.41		60
16	23	8	15	24	9.7	20.44		61.23		60
16	23	10	15	24	12.3	34.62		59.92		60
17	22	10	15.3	24.4	12.3	24.86		60.59		60
17	21	8	15.3	24	9.7	25.56		60.67		60
17	23	8	15.3	24.4	9.7	26.89		61.34		60
18	23	10	16.4	24.4	12.3	29.78		60.38		70
18	24	9	16.4	25	11.2	34.78		60.89		70
18	25	10	16.4	25.9	12.3	37.97		64.56		70
19	24	9	17.3	25	11.2	40.39		65.32		80
19	25	10	17.3	26	12.3	39.42		62.31		80
19	26	10	17.3	27.3	12.3	48.32		69.56		80
20	25	10	18.5	26.3	12.3	39.29		70.32		90
20	28	10	18.5	29	12.3	45.76		73.88		90
20	32	10	18.5	32.3	12.3	58.91		78.75		90
21	29	10	18.2	31.3	12.3	39.65		77.19		100
21	26	8	18.3	27.4	9.7	46.54		78.32		100
21	28	10	18.3	30	12.3	50.39		77.45		100
22	28	10	20.5	30	12.3	49.32		79.89		120
22	32	10	20.5	33.4	12.3	43.58		73.43		120
23	32	10	21.3	33.4	12.3	44.56		74.56		120