Description

PRODUCT DETAILS
Brand	Shumyip
Manufacturer	EI-Cores
Country Of Origin	China
Product Type	Silicon Steel Core
Design	Toroidal
Application	High-power power distribution at utility frequency, new energy photovoltaic storage, smart grid upgrades, and precision medical equipment.

This toroidal core is tightly wound from high-grade Cold Rolled Grain Oriented (CRGO) silicon steel strip, fully coated with black epoxy resin for insulation, moisture resistance, mechanical protection and noise reduction. With seamless closed magnetic circuit design, it effectively minimizes air gap loss and magnetic leakage, delivering outstanding low no-load loss, high magnetic permeability, low vibration and quiet operation performance. We support customized outer diameter, inner diameter, height and silicon steel thickness to match various power design requirements.

Available Silicon Steel Thickness Options

We supply multiple standard strip thickness for different working frequency scenarios:

0.23mm, 0.27mm, 0.30mm, 0.35mm for 50Hz industrial frequency transformers & current transformers;

Ultra-thin 0.05mm, 0.08mm, 0.10mm, 0.15mm for medium & high frequency inductors, inverters and new energy equipment.

Key Advantages

Closed-loop magnetic structure greatly reduces magnetic flux leakage, improves electromagnetic conversion efficiency
Lower core loss, less heat generation and stable output under long-term continuous heavy load operation
Low vibration & low operating noise, superior to traditional EI laminated silicon steel cores
Strong anti-saturation property, excellent stability for large-current sampling & power transformation
Epoxy coating prevents rust, insulation breakdown and layer separation during winding & installation

Wide Application Fields

High-power toroidal isolation transformers for medical equipment, industrial UPS, audio amplifiers
Busbar type current transformers, zero-sequence CT cores for power grid metering & leakage protection
Filter reactors, harmonic suppression inductors for photovoltaic inverters & EV charging piles
Auxiliary power transformers for rail transit, frequency converters, energy storage PCS systems
Custom special magnetic cores for industrial control, military power supply & precision testing instruments

Notes for Use

Avoid violent impact or extrusion to prevent winding layer cracking and magnetic performance degradation
Reasonably arrange winding turns evenly to avoid unbalanced magnetic flux and increased noise
Do not run continuously beyond rated power to prevent overheating, insulation aging and demagnetization
Reserve cooling space during installation; adopt sealed treatment for humid working environment
Keep away from strong permanent magnets to avoid partial magnetization and measurement deviation

Market Prospect

CRGO toroidal cores remain the mainstream choice for medium & high-power industrial frequency magnetic components with mature processing technology and balanced cost-performance. Benefiting from global smart grid upgrading, new energy photovoltaic & energy storage industry expansion, demand for low-loss customized toroidal silicon steel cores keeps growing steadily. Compared with amorphous and nanocrystalline cores, our silicon steel toroidal cores feature stronger mechanical strength, better overload resistance and more competitive price for large-size power applications.