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High Frequency Transformer Coil Structure

Oct 18, 2017

High Frequency Transformer Coil structure

What are the specifications and models of the transformer? Specifications and models is how to develop it?

First, classification

Sort by cooling: dry (self-cooling) transformers, oil immersion (self-cooling) transformers, fluoride (evaporative cooling) transformers.

According to moisture-proof classification: open-type transformers, potting transformers, sealed transformers.

According to the core or coil structure classification: core transformer (insert core, C-core, ferrite core), shell transformer (insert core, C-core, ferrite core), Ring transformers, metal foil transformers.

According to the number of power supply categories: single-phase transformers, three-phase transformers, multi-phase transformers.

By use classification: power transformers, voltage transformers, audio transformers, IF transformers, high-frequency transformers, pulse transformers.

Second, the power transformer characteristics of the parameters

1, the working frequency

Transformer core loss and the frequency of a great relationship, it should be based on the use of frequency to design and use, this frequency, said the operating frequency.

2, rated power

At the specified frequency and voltage, the transformer can work long hours, and does not exceed the specified temperature rise of the output power.

3, rated voltage

Refers to the voltage applied to the coil of the transformer, the work should not be greater than the specified value.

4, the voltage ratio

Refers to the transformer primary voltage and secondary voltage ratio, there is no-load voltage ratio and load voltage ratio difference. 5, no-load current

Transformer secondary open circuit, the primary still have a certain current, this part of the current called no-load current. The no-load current consists of magnetizing current (generating flux) and iron loss current (caused by core loss). For a 50 Hz power transformer, the no-load current is substantially equal to the magnetizing current.

6, no load loss

Refers to the transformer secondary open circuit, measured in the primary power loss. The main loss is the core loss, followed by the no-load current in the primary coil copper resistance on the loss (copper loss), this part of the loss is very small.

7, efficiency

Refers to the percentage of the ratio of the secondary power P2 to the primary power P1. Usually the greater the rated power of the transformer, the higher the efficiency.

8, insulation resistance

Indicates the insulation between the coils of the transformer and between the coils and the core. The level of insulation resistance is related to the performance of the insulating material used, the level of temperature and the degree of moisture.