Dedicated Anti-vibration Dry-type Traction Transformer Solution for Rail Transi

Scenario Characteristics and Core Challenges​
In traction power supply substations for subways and high-speed railways, transformers are continuously subjected to structural vibrations (8-200Hz) originating from rolling stock and tracks. They simultaneously face harsh conditions including space constraints, fire safety requirements (EN 45545), and electromagnetic interference (EMI). Conventional transformers are prone to winding loosening and core displacement due to prolonged vibration, leading to increased noise, local overheating, and even insulation failure.

​Targeted Anti-vibration Technical Solutions​

​Mechanically Reinforced Anti-vibration Structure​

• ​Winding End Reinforcement:​​ High-strength glass fiber tape impregnated with epoxy resin is used to integrally encapsulate and reinforce winding ends. This creates a rigid-yet-flexible support structure, effectively suppressing conductor fretting wear under high-frequency vibration.
• ​Core Reinforcement Technology:​​ Utilizes a three-step staggered stacking process (optimizing magnetic flux distribution and reducing vibration sources) combined with full-coverage binding using epoxy-impregnated glass fiber tape. This replaces traditional steel banding, eliminating vibration transmission caused by core magnetostriction and ensuring overall core rigidity.

​Electromagnetic Compatibility (EMC) and Safety Assurance​

• ​Integrated Electrostatic Shield:​​ A high-conductivity copper electrostatic shield is positioned between high-voltage and low-voltage windings, reliably grounded. This effectively suppresses high-frequency conducted interference (kHz to MHz range) generated by inverters and rectifiers, ensuring clean control signals. The shield design balances heat dissipation and insulation safety, strictly complying with EN 45545 requirements for HL-grade materials regarding flame retardance, low smoke, and low toxicity.

​Optimized Operation and Maintenance Design​

• ​Modular Unit Structure:​​ Employs a split-phase modular design. Each single-phase module integrates wiring, cooling, and monitoring interfaces. In case of failure, replacement involves only disconnecting, removing the faulty module, embedding a spare module, and reconnecting. Key maintenance steps are completed within a standardized operating time of under 2 hours, significantly shortening failure downtime windows.

​Validated Performance​

• ​Beijing-Zhangjiakou High-speed Railway Project Test Data:​​ Under full-load operating conditions, continuous professional shaker table testing simulating the 8-200Hz track vibration spectrum showed transformer body noise increase remained stable at ​​<3dB. This performance far exceeds industry norms (≤5dB is considered excellent), validating the exceptional reliability of its anti-vibration design and manufacturing process.

​Core Value​

• ​Superior Vibration Resistance:​​ Multi-layer reinforcement technologies ensure stable transformer operation under broad-spectrum vibrations (8-200Hz), doubling service life.
• ​Clean Power Supply:​​ Efficient electromagnetic shielding eliminates harmonic interference, safeguarding sensitive onboard equipment.
• ​Minute-level Recovery:​​ Modular design enables rapid repairs within 2 hours, maximizing line availability.
• ​Safety Compliance:​​ Overall design strictly complies with rail transit fire safety standards such as EN 45545.