This paper presents a new topology of Hybrid Excited Flux-Switching Machine (HE FSM) with excitation coils located in stator slots (or inner DC windings). After describing the three phase structure to be investigated, the working principle is discussed and main electromagnetic performances are simulated by Finite Element (FE) Analysis. It is demonstrated that the airgap field can be easily controlled which is interesting for variablespeed applications. Finally, a prototype having 12 stator poles and different rotor teeth number (10 or 14) was built. Experiments were performed validating FE simulations and the operation principle. Finally, the thermal behavior of the prototype machine is investigated through experiments. It is shown that up to 12000rpm, the thermal stabilization is achieved, making this topology an excellent candidate for high-speed applications.Index Terms-Brushless machine, finite element analysis, hybrid excited, flux-switching.

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A general solution of the magnetic field in the airgap of conventional and alternate field-excited switched-flux (FE-SF) machines is proposed in this paper. The analytical model is based on the subdomain method. It involves the solution of governing field equations in a doubly slotted airgap using the variable separation method. The complete model is derived and described in a general manner so that it can be easily extended to unconventional FE-SF topologies. By means of example, analytical predictions of airgap field are extensively compared and validated using 2D FE results. FE simulations were performed on a 24-10 classical FE-SF structure and also on a novel 18-11 FE-SF machine with additional spacer teeth.Index Terms-Exact analytical calculation, flux-switching, Poisson Laplace's equation, slotting effect, switched-flux. 0018-9464

Design of Experiments predictive models as a tool for lifespan prediction and comparison for enameled wires used in low voltage inverter-fed motors. (2020) IEEE Transactions on Industry Applications, 56 (3). 3100-3113.