Electric drivetrain system

for electric vehiclesfor utility vehicles

Reliable current transfer under oil – for the entire vehicle lifetime
Schunk’s wet-running power transmission system enables consistent and secure current transfer in externally excited synchronous motors (EESM), even under heavy oil exposure. The material system is optimized for oil-cooled environments and supports increased EV range without increasing battery capacity.

Product description
The system is engineered for continuous wet-running operation and provides a maintenance-free current transfer solution for traction motors in passenger cars, light and heavy commercial vehicles, and high-performance EV powertrains with active oil cooling. It supports rare-earth-reduced or rare-earth-free drive concepts as an alternative to permanent-magnet solutions.

Your Benefits:

• Cost savings by eliminating radial shaft seals
• Improved motor efficiency contributing to increased EV driving range with the same battery capacity
• Reduced dependency on concentrated rare-earth supply chains
• Designed for vehicle lifetime operation, maintenance-free, tested under near-real-life conditions
• Material system developed to meet demanding oil-exposed environments

Typical Applications

• Electric traction motors for passenger cars, light commercial vehicles and trucks
• High-performance EV powertrains with active oil cooling
• Drive systems designed to reduce or eliminate rare-earth magnets
• Environments where oil contamination of the motor is expected

Characteristics / technical specifications

• Designed for externally excited synchronous motors (EESM)
• Reliable current transfer under continuous oil exposure for full vehicle lifetime
• Material system optimized for oil-cooled environments
• Enables elimination of radial shaft seals
• Improves motor efficiency to extend EV range without larger batteries
• Supports rare-earth-reduced or rare-earth-free drive system concepts
• Maintenance-free concept, tested close-to-real-life conditions
• Material combination developed to meet industry durability requirements