Coil winding is fundamentally about precision. Yet the materials behind each winding — the conductor, the insulation, the magnetic components — ultimately determine how efficiently and reliably a product performs. As Europe’s electrification efforts intensify, material decisions are becoming more strategic across the motor, transformer and power electronics markets.

For procurement leaders, engineers and R&D specialists, a clear understanding of material behaviour is essential. And CWIEME Berlin remains the central place to evaluate the full material spectrum in one venue.

Copper continues to lead — but demands are changing

Copper remains the material of choice for coil winding across motors, generators and transformers. Its conductivity, durability and thermal performance make it indispensable. But increased demand, global price fluctuations and supply chain pressure mean procurement teams now assess copper with a sharper lens.

Many suppliers are developing new copper grades and refined conductor formats — from high-precision wires to foil and strip — which support more compact and efficient winding designs. For EV applications, these innovations can directly influence motor performance and energy consumption.

Insulation: the hidden performance layer

Insulation systems are critical to heat management, dielectric strength and long-term reliability. Engineers increasingly reference insulation as a limiting factor when pushing for higher power density.

Materials gaining attention include:

• High-temperature insulation films

• Enhanced varnishes and resins supporting vacuum pressure impregnation

• Sustainable insulation alternatives helping organisations meet environmental targets

For many manufacturers, insulation is where meaningful efficiency gains can be unlocked.

Magnetic materials powering the next generation of electrification

As motors and transformers evolve, magnetic materials are undergoing their own transformation. Improvements in lamination steels, core geometries and rare-earth magnet technologies are enabling stronger, lighter and more efficient systems.

Suppliers across magnetic materials remain a core part of the CWIEME ecosystem. Their innovations help engineers meet the demanding performance expectations in sectors like e-mobility, industrial machinery and power distribution.

Why material selection matters more in 2026

Across the value chain, organisations are under pressure to deliver more — more efficiency, more durability, more sustainability — without increasing costs. Precise material selection, combined with advanced winding techniques, allows teams to optimise performance without major redesigns.

For procurement specialists, material decisions are directly tied to supply security, lead times and total cost of ownership. For R&D leaders, materials determine how far they can push new technologies.

Where CWIEME Berlin leads the conversation

CWIEME Berlin brings together the world’s leading copper suppliers, insulation developers, magnetic manufacturers and solution providers. With 74% of engineering, procurement and R&D attendees actively evaluating purchases, material suppliers benefit from real, engaged conversations — and visitors gain a collective understanding of what’s available today and what’s coming next.

In a market defined by innovation and rising demand, material intelligence is a strategic advantage. And this is where the CWIEME community continues to excel.