Technical Paper
Optimization of laminated stack solutions for electric motors in electrified vehicle drives
2024-04-09
2024-01-2214
The transition towards electrified vehicles marks the release of new products in the automotive market and a continuing effort to optimize their performance. The electric motor is a key component in the electric drive where a further optimization of power loss, power density and cost can be achieved. In the laminated core of the electric motor additional benefits can be realized. This paper presents a new method to produce laminated stacks with a new combination of processes that distinguishes it from conventional methods. The manufacturing sequence includes a unique order of precision blanking, dedicated heat treatment and gluing. The separate and combined effects of these processes are compared with available state-of-the-art solutions. Such solutions typically contain some of the individual features but not the combination that enhances the overall effect. The heat treatment reduces power losses by releasing process stresses which decreases hysteresis losses.