Emission reduction legislation is driving two significant trends in the automotive industry: vehicle electrification and intensified light weighting. The effect of this is the proliferation of electric motors being used in vehicles from drive motors to electrified braking systems.
The need for cost reduction within electric motor manufacture is intensified, while at the same time the performance requirements in terms of power, space and efficiency are ever increasing. The use of light weight allows is increasing (such as aluminium alloys) for housings, which brings challenges in the manufacturing of electric motors.
Tolerance rings have been a solution to these process inefficiencies by providing the right retention force over manufacturing and thermal tolerances and making the assembly process more efficient. However, for some electric motor applications, tolerance rings were a compromise when it came to thermal conductivity, especially when used to retain motor stators into the housing. RENCOL® Aluclad, a new bi-metallic tolerance ring, greatly improves the thermal transfer capabilities of RENCOL®, allowing tolerance rings to be used as stator mounts in a wider variety of motors.