How Are VOLTAGE CONVERTER ENCLOSURES for TRAINS and BUSES Made? – Factories in Poland

Why It Matters

Reliable converter housings are essential for the performance and safety of electric rail and bus systems, making them a strategic component in Europe’s push toward sustainable public transport.

Key Takeaways

• Design uses 2D/3D CAD to meet customer specifications.
• 4 kW fiber laser cuts 8‑10 mm sheet metal efficiently.
• CNC bending, machining, and robotic welding ensure precision and durability.
• Chemical etching and powder coating provide corrosion resistance.
• Quality checks follow EN 15085 and German bond standards for safety.

Summary

Smart Trading Company in Yaf Chitza, Poland, showcases how voltage converter housings for trains, trams and electric buses are produced. The video walks through each production stage, from CAD design to final shipment, highlighting the factory’s blend of modern laser cutting, CNC machining and robotic welding.

Design engineers generate 2D and 3D documentation tailored to client specifications. Sheet metal, typically 8‑10 mm thick, is cut with a 4 kW fiber laser, bent by 180‑220 ton presses, and machined on fully automated CNC lathes and mills. In the welding shop, TIG, MIG and laser processes—augmented by robots—join aluminum, carbon steel and stainless steel components, complying with EN 15085 and German bond standards.

The factory emphasizes surface treatment: copper parts receive chemical roughening, while all housings undergo etching, pickling and either wet painting or powder coating, cured at 180‑240 °C. Random samples are laboratory‑tested for paint adhesion and durability, ensuring long‑term corrosion resistance.

By integrating rigorous quality controls and standardized procedures, Smart Trading delivers robust, heat‑dissipating enclosures that safeguard propulsion electronics, directly influencing the reliability and safety of Europe’s expanding electric rail and bus fleets.

Original Description

[Sponsored by Smart Trading Company]

In this episode, we take a behind-the-scenes look at the production of enclosures for voltage converters used in railways and public transport vehicles. These seemingly inconspicuous structures protect advanced power electronics from moisture, dust, vibrations, and high temperatures, while ensuring passenger safety and the reliability of entire drive systems.

We visit the Smart Trading Company facilities in Jawczyce, where we walk you step by step through the entire enclosure manufacturing process—from 2D and 3D design in the engineering office, through laser cutting, bending, CNC machining, and welding using TIG, MIG, and laser methods, all the way to chemical treatment and painting. You’ll see modern machinery, robotic production lines, and rigorous quality control at every stage.

Finally, we move to final assembly and the laboratory, where coating durability and compliance with railway standards—including EN 15085 and the requirements of German Railways—are tested. The finished enclosures are then shipped to customers across Europe. If you want to see how precision, technology, and experience form the foundation of modern transport—this episode is for you.