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This paper presents a comparative study on four different structures of variable speed constant frequency (VSCF) wind power generator. The analysis results show that the direct-driven permanent magnet (PM) generator has good performance but high cost; the doubly-fed induction generator has low cost but poor reliability; the half-direct-driven PM generator and doubly-fed brushless generator may be...
Based on the operation principle of linear actuator of magnetically controlled shape memory alloy (MSMA), two kinds of rotating MSMA actuator are introduced in this paper. The operation principle, structure and control strategy are discussed. The expressions of displacement and rotating speed are derived. The relationship between control magnetic field and permeability of the MSMA are analyzed. Based...
In this paper, the structure design characteristics of high speed permanent magnetic (HSPM) machine are analyzed. A comparative study about the influence of different stator structures on machine performance for a same PM rotor is carried out based on the magnetic field analysis using the finite element method (FEM). Further more, the stator teeth notching effect is discussed on the iron loss of stator,...
In order to improve operation performance of underwater vehicle counter-rotation propeller propulsion system, a new type of PMSM with opposite-rotation dual rotors (ODR) has been proposed. The principle of operation and magneto- electric models are discussed. The magnetic field generated by both rotors magnets is analyzed by MagNet software. The results prove that PMSM with ODR designed can produce...
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