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Dual-rotor permanent-magnet wind generators can substantially improve the utility of wind power even at a low wind speed due to its high relative speed between the magnetic field and windings. This paper briefly introduces its principle and structure, establishes its equivalent magnetic circuit based on the open-circuit flux distribution of the designed motor, and then calculates the airgap flux density,...
A new structure is set forth for the interior composite-rotor controllable-flux permanent magnet synchronous machine (PMSM). NdFeB permanent magnet(PM), which has high remanent flux density as well as high coercive force, and AlNiCo PM, which has high remanent flux density but low high coercive force, are used in this structure. The magnetization intensity and direction of AlNiCo PM can be controlled...
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