Electronic transformers: Pioneers of modern power conversion

1. Definition and working principle

• definition: Electronic transformer (PET) realizes energy transfer and voltage conversion through power electronics technology. It has both the transformation and isolation functions of traditional transformers and can also achievePower quality regulation, power flow control, reactive power compensation。
• Principle: By controllingPower semiconductor devicesOn and off, changing the voltage, current and frequency to achieve adjustable output; input and output are realized through a transformerelectrical isolation, and adjust the output voltage according to the transformation ratio.

2. Structural composition

• Iron core: main magnetic circuit and mechanical support, forming a closed magnetic circuit
• Winding: power transmission and magnetic field establishment, using high-frequency magnetic core design
• High-frequency switching devices: realizing power electronic conversion, different from traditional transformers
• Cooling, insulation and protection devices: ensuring stable and safe operation

3. Main categories

• Isolation transformer: Strong electrical isolation to ensure safety and anti-interference
• Autotransformer: Small size, high efficiency, weak isolation performance
• pulse transformer: Adapted to pulse working conditions, used for low voltage conversion and signal transmission

4. Typical applications

• Household appliances: power supply adaptation for computers, TVs, microwave ovens, etc.
• Industrial automation: stable power supply for robots and production line equipment
• Power Systems: Substation Voltage Conversion and Distribution
• Communication equipment: base stations, switch power supplies and signal processing
• Medical equipment: precision power supply and safe isolation