Design comparison of two rotating electrical machines for 42 V electric power steering

The proposed paper presents two design procedures of rotating electrical machines for 42 V embedded application. Particularly, for an electrical power steering, a three-phase interior permanent magnet synchronous machine (PMSM) fed by a switch redundant power converter and a six-phase induction machine (IM6) fed by a new type of six switches converter are designed for future 42 V DC system. For the PMSM, the magnetic circuit has been fully designed using the optimization from analytic and finite-element based software. For the IM6, a classical magnetic circuit coming from a traditional three-phase squirrel-cage low power induction machine has been used. The final design results are compared on the basis of the power-to-weight ratio