As the demand for electric motors increases, so do the requirements for their efficiency and power density. Additive Drives uses oil cooling to achieve high power density above 25 kW/kg in a small space. In this way, we are improving the possibilities of electric drives not only in the automotive sector, but also, for example, in motor sport or aviation.
The combination of the drive train concept, which forces heat transfer from the conductors to the laminations, with an integrated oil cooling system enables motors to be cooled more efficiently than ever before.
The integrated oil cooling in the stator laminations allows the fluid to flow directly around the heat affected parts, removing a large amount of heat energy. Advanced sealing systems allow high speed operation. The different cooling technologies are:
- Direct slot cooling
- Stator stack oil cooling close to the slot
- Spray cooling of end turns
In order to optimise the cooling system, Additive Drives offers its customers thermal simulations at the motor design stage. Lifetime and insulation tests are also available to support customers.