Abstract
This paper focuses on simulation of noise radiated by Switched Reluctance Motors for automotive powertrains. Since control for maximum efficiency leads to high torque ripple and noise radiation, optimizing the NVH behaviour is essential. The simulation approach, based on electro-magnetic and vibro-acoustic finite element models and applicable to other electric motors, is illustrated with concrete results.
Highlights
Switched Reluctance Motors are an interesting alternative to Permanent Magnet Synchronous Motors, currently used in most electric powertrains
SRMs pose challenges: complex controls including phase overlap are needed to limit torque ripple caused by phase switching and their operation results in high noise radiation
Optimization of the control strategy to reduce torque ripple has a beneficial effect on noise radiation
Summary
Switched Reluctance Motors are an interesting alternative to Permanent Magnet Synchronous Motors, currently used in most electric powertrains. SRMs achieve maximum efficiency over a wide speed range, making their average efficiency over a real drive cycle similar to PMSMs. SRMs achieve maximum efficiency over a wide speed range, making their average efficiency over a real drive cycle similar to PMSMs To these advantages, SRMs pose challenges: complex controls including phase overlap are needed to limit torque ripple caused by phase switching and their operation results in high noise radiation. The work in this paper was carried out on a 4phase SRM with an 8/6 configuration (8 stator poles, 6 rotor poles), delivering 40 kW peak power and 200 Nm peak torque.
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