Power distribution of a co-axial dual-mechanical-port flux-switching permanent magnet machine for fuel-based extended range electric vehicles

Abstract

In this paper, power distribution between the inner and outer machines of a co-axial dual-mechanical-port flux-switching permanent magnet (CADMP-FSPM) machine is investigated for fuel-based extended range electric vehicle (ER-EV). Firstly, the topology and operation principle of the CADMP-FSPM machine are introduced, which consist of an inner FSPM machine used for high-speed, an outer FSPM machine for low-speed, and a magnetic isolation ring between them. Then, the magnetic field coupling of the inner and outer FSPM machines is analyzed with more attention paid to the optimization of the isolation ring thickness. Thirdly, the power-dimension (PD) equations of the inner and outer FSPM machines are derived, respectively, and thereafter, the PD equation of the whole CADMP-FSPM machine can be given. Finally, the PD equations are validated by finite element analysis, which supplies the guidance on the design of this type of machines. © 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

Dual mechanical port power distribution in dual rotor permanent magnet flux switching generator for counter‐rotating wind turbine applications

“…In the proposed DMPDRCR-PMFSG, the power distribution between IRPMFSG and ORPMFSG that contributes to cumulative power is mainly dependent on the power ratio of IRPMFSG and ORPMFSG, which is defined in terms of the split ratio (k io ) for quantitative analysis and depends on geometric parameters. Based on the design parameter relation, the slot area for inner armature winding (S in ) and the outer armature winding (S o ) are expressed as [34]…”

“…In the proposed DMPDRCR‐PMFSG, the power distribution between IRPMFSG and ORPMFSG that contributes to cumulative power is mainly dependent on the power ratio of IRPMFSG and ORPMFSG, which is defined in terms of the split ratio ( k io ) for quantitative analysis and depends on geometric parameters. Based on the design parameter relation, the slot area for inner armature winding ( S in ) and the outer armature winding ( S o ) are expressed as [34] $$\begin{equation}{\rm{\ }}{S_{{\rm{in}}}} = \frac{\pi }{3}\ {\alpha _3}\left( {D_{{\rm{siy}}}^2 - D_{{\rm{sii}}}^2} \right) + \frac{1}{4}h_{{\rm{ti}}}^2\sin \left( {{\alpha _2}} \right)\end{equation}$$ $$\begin{equation}{\rm{\ }}{S_{{\rm{out}}}} = \frac{\pi }{3}\ {\alpha _4}\left( {D_{{\rm{soo}}}^2 - D_{{\rm{soy}}}^2} \right) + \frac{1}{4}h_{{\rm{to}}}^2\sin \left( {{\alpha _1}} \right)\end{equation}$$…”

Analysis of coupling between two sub‐machines in co‐axis dual‐mechanical‐port flux‐switching PM machine for fuel‐based extended range electric vehicles

“…So far, the main focus on CADMP-FSPM machines is the structural optimisation, performance analysis, and power distribution [4,9]. The PMs field coupling phenomena of a 10inner-rotor-pole/12-inner stator-slot-12-outer-stator-slot/22-outerrotor-pole (10/12-12/22) CADMP-FSPM machine was introduced and a mechanical decoupling method was given in [4].…”