EER Transformer

EER Transformer

The popular EER transformer in market Feneng, the one of the largest professional manufacturers of EER transformer in South of China, welcome to our factory ! Super EER transformer apply to power supply, household equipment. Guangzhou Feineng Electronic Co., Ltd have capable to customize EER...
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Product Details

The popular EER transformer in market

Feneng, the one of the largest professional manufacturers of EER transformer in South of China, welcome to our factory ! 

ow is the high frequency transformer wound?

Two things must be noted to make it well:

  One: each winding should adopt many fine copper wires and be wound together, not 

single thick copper wire, because high frequency ac has skin effect.

The so-called skin effect, simply put, is that high frequency ac only walks along the 

surface of the wire.The inside of the wire does not run current

The weaker the axial current in the wire, the closer it is to the surface of the wire, 

the stronger the current is.The use of multiple strands of thin copper wire and winding 

together, is actually to increase the wire

The surface area of the wire, thereby making it more efficient to use the wire.For example, 

the primary 3T+3T, if you use a single enamelled wire with a diameter of 2.50mm, the 

cut of the wire

The area is 4.9 mm square, and if 38 pieces of enamelled wire (single section area 0.132 mm square) 

with a diameter of 0.41mm are used and wound, the total cut is

The area also meets the requirement.However, the second method has a much larger surface area of 

the wire (the first method has a surface area of a single wire cut off)

The surface circumference * the number of shares * the total length of the winding =2.5 * 3.14 * 1 * L=7.85L

Perimeter x number of shares by winding the total length = 0.41 * 3.14 * 38 * L = 48.92 L, 

and the latter is the former's 48.92 L / 7.85 L = 6.2 times),conductor

It has higher effective utilization rate, more smooth current, and more flexible 

winding because of the soft thin wire. The secondary 75T high voltage winding can 

be wound by 3 to 5 pieces.

Quick Details

Place of origin:Guangdong,China

Brand Name:Feineng

Model Number:EC4045

Usage:High Frequency


Coil Structure:Toroidal

Coil Number:Autotransformer


Working freque…20kHz-500KHz

Storage temper…­25℃to+85℃

External structu…Vertical or horizontal are availa…

Coil Structure:Coil

Phase number:Single


lnput rated colt…Single-phase220V-230V

Output voltage:According to the customer'a p…

Temperature ri…<85℃

Packaging &Delivery

Packaging Details

Standard export carton

Delivery Time

5-7 working days after payment confirmed

Super EER transformer apply to power supply, household equipment. 


Guangzhou Feineng Electronic Co., Ltd have capable to customize EER transformer for buyers.please send your specification or drawing.

The relationship is introduced between power and frequency and core of high frequency transformer 

What is the relationship between high frequency transformer power and frequency and iron core?

The power approximation of high frequency transformer is in direct proportion to core capacity and core cross-sectional area, 

ac frequency and core magnetic density,Actual output power

It's related to the wire diameter, and it's proportional to the size of the core window. With equation

Formula forWindow size * core area = (output power * traverse current)/(a coefficient * ac frequency * core magnetic density),

This formula is more accurate. Another common but less accurate formula is (core cross-section area x magnetic density x lamination coefficient) squared

For the standard EI core, in the first formula, the window size is the same as the iron core cross-section area, and for the power frequency alternating 

current, it becomes

The second formula,Both of these formulas are empirical.

What is the relationship between transformer power rate and frequency

Suppose we are talking about a transformer, as is commonly known, whose core is made of a cold-rolled silicon steel sheet with high magnetic conductivity.

 Under this condition:

Frequency increase: the magnetic flux density in the core decreases proportionally, but under the same magnetic flux density, the higher the frequency, 

the greater the unit loss of the core.

When the two are combined, the result is a higher frequency and a lower unit loss of the core.

Core loss is the reduction of no-load loss.

Transformer efficiency A= output power P2/ input power P1= (input power P1- no-load loss P0- load loss PK)/ input power P1= (p1-p0-pk)/P1

Therefore, if other conditions remain unchanged, the frequency is increased. As the no-load loss P0 decreases and the output power P2 increases, 

the efficiency of the transformer increases.

The power of the transformer is related to the section area of iron core and the diameter of copper wire. The larger the section area is, the larger 

the window space is and the larger the diameter of copper wire is.

Transformer labeled 4 w, its core column cross-sectional area: S = 1.25 * square root of P = 1.25 * square root of 4 = 2.5 ㎡ (c)



Well-developed EER  transformer  , Exquisite workmanship and perfect details.


High standard packaging of EER  transformer to avoid transport damage


The EER transformer Obtain a variety of new patent certification


Welcome to contact us
 Lily Hu(Sales manager)
 WhatsApp/WeChat: +86 13437828901