Dry type transformer for charging stations

The dry-type power transformer is a powerful ally in the race to transition to sustainable energy. As electric mobility becomes a cornerstone of modern transportation, reliable and efficient power supply solutions are critical.  medium voltage dry-type transformers stand out as the recommended choice for electric vehicle (EV) charging stations. Their innovative design, operational benefits, and eco-friendly features align perfectly with the demands of the charging infrastructure sector.

In order to effectively support electric mobility, the dry-type transformer is set to become the recommended power supply choice for electric vehicle charging stations.

1. Connection to the Power Source

2. Communication Between the EV and the Station

• Verifying the compatibility of the EV with the station.
• Detecting the charging cable connection.
• Negotiating the charging speed (based on the EV's battery capacity and the station's output).

3. Power Delivery

Once the connection and communication are established, the charging station supplies power to the EV. Charging can occur in three main levels:

4. Monitoring and Control

5. Safety Features

Charging stations are designed with safety mechanisms to prevent accidents:

• Ground fault protection to avoid electrical shocks.
• Overcurrent and overheating protection.

Role of Dry-Type Transformers in Charging Stations

dry-type power transformers, play a crucial role in delivering safe and efficient power to charging stations by:

• Stepping down voltage from the grid to the levels required by the chargers.
• Managing power loads and preventing fluctuations that could damage equipment or vehicles.
• Oversized neutrals and high K-factor – required to prevent overheating due to inherently high load harmonic distortion.
• Shielding – required to protect other equipment from voltage transients and high frequency noise.
• Special windings as necessary to cancel harmonics – mixing secondary winding types on site can greatly reduce harmonic noise.

Applications of Dry-Type Transformers in EV Charging Stations

• High-Power Charging Hubs 

• Urban Charging Networks 

• Renewable Integration 

• Critical Infrastructure 

Environmental adaptability: Advantages of dry transformers
 
Charging piles are usually distributed in urban streets, commercial centers and highway service areas, which puts higher requirements on the durability and adaptability of transformers:
 
1. Moisture-proof design: Even in wet or rainy areas, the dry transformer can still operate normally.
 
2. Efficient heat dissipation: Natural air cooling or forced air cooling design to meet the heat dissipation requirements under high loads.
 
3. Low noise: Especially suitable for areas sensitive to environmental noise.

Customized solutions from Varelen  
As a specialist transformer manufacturer, Varelen offers the following high performance dry transformer solutions for the charging pile industry: 

• Customized capacity: to meet the needs of different charging station sizes.
   
• Harmonic optimization: K-factor design is adopted to reduce the harmonic impact of charging piles.
• Modular installation: Rapid deployment, saving construction time and cost.
   
• Ultra-high efficiency: The use of amorphous alloy core to further reduce no-load losses and save energy costs.

Dry-type transformers for charging stations， The dry-type transformer is a powerful ally in the energy transition race.