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This paper deals with the field-circuit method developed for quick computation of load characteristics of stand-alone permanent magnet synchronous generators (PMSGs) with different rotor structures. The method is based on the so-called loading method, used widely for calculation of electromechanical characteristics of permanent magnet synchronous motors. In the developed calculation algorithm, the...
Traditional methods of AC synchronous generator short-circuit fault analysis such as symmetrical component method, coordinate transformation method can not consider eddy current, while multi-loop method can only use air-gap magnetic conductivity concept to calculate inductances, which roughly considers the saturation of ferromagnetic materials. Finite element method (FEM) can solve the above problems,...
Air-gap magnetic field of electromagnetic continuously variable transmission (EMCVT) is composed by permanent magnet and electromagnetic excitation winding. FEM is adopted to study the three-dimensional airgap magnetic field based on mathematical model. The trust deduced of air-gap magnetic field from FEM is verifield been adjusted by the theoretic prototype. The study shows the magnetic field of...
In this paper, a new permanent magnet (PM) flux-mnemonic brushless machine is proposed and implemented as an integrated-starter-generator (ISG) for hybrid electric vehicles (HEVs). The key is to integrate the concept of memory motor, namely the flux-mnemonics, with the doubly-salient PM (DSPM) machine. Hence, it offers the advantages of mechanical robustness, controllable air-gap flux, and efficient...
This work deals with the representation of three-phase and three-limb transformers in two dimensions using FEMM (finite element methods on magnetics). The transformer magnetization curve is obtained using the magnetization characteristic for the silicon steel used when assembling the transformer core, associated to the air gaps inherent to the assembling process. A method for the calculation of the...
A method for the computation of the transient electromagnetic thrust force in the tubular linear motor, in which the iron saturation and the relation motion of the rotor and stator are taken into account, is given in this paper. This method is based on the finite element computation by using a dynamic model coupled with the equations of external electric circuit. To avoid air-gap mesh distortion cased...
This paper presents a novel three-phase, multipole, double-stator permanent-magnet (PM) motor drive for electric vehicles (EVs). Compared with conventional PM brushless motors, it has many distinct features. First of all, it has the advantage that currents of both the inner and outer stators produce electromagnetic torque and there are two air-gaps to deliver the output torque, thus improving the...
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