Toroidal iron core: 1. Close flux path 2. Low magnetic leakage and low noise 3. High efficiency 4. Light weight

Toroidal iron core:  (A series)

A round core wound by automatic machines with one continuous tape of CRGO silicon steel and annealed in a tunnel furnace under the protection of inert gases.

Material thickness: 0.30mm,  0.27mm,  0.23mm, 0.10mm,  0.08mm and 0.05mm

 

Toroidal iron core: (B series)

 B round core wound by short silicon steel strips in 1 to 3 meters long, wounded with joints. They were annealed in vacuum furnace or tunnel furnace under protection of inert gases. The core posses the same advantages of A series, but the price was around 50-70% less than A series.

B series core commonly used as a replacement of EI and other toroidal transformers with lower magnetic loss requirement.

Material thickness: 0.30mm, 0.27mm, 0.23mm

 

Material Grade	Equivalent Grade	Bm (Gauss)
BI	M3-0.23mm	16500/17000
BII	M4-0.27mm/0.30mm	16000
BIII	M5-0.30mm	15500

Can produce according to customers’ specification.

 

Toroidal core application:

Power transformer

Inductor

Instrument transformer

Audio transformer

Voltage regulators

Ballast

 

The advantage of toroidal core (Compare with EI core)

Smaller sizeLighter weightLess magnetic leakageBetter over-load capacityLow temperature riseEasier design and mount

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Toroidal iron core