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Based on the dq-axis model, the flux-weakening characteristics of switched-flux permanent magnet machines (SFPMMs) with 12/10, 12/11, 12/13, 12/14 stator/rotor pole number combinations and different winding configurations are analyzed by the flux-linkage method accounting for crosscoupling effect. It is shown that the stator and rotor pole number combinations have significant influence on flux-weakening...
Permanent-magnet AC (PMAC) servomotor is finding expanded use in high-performance applications. Because servomotor is always required to instantaneously provide 3 times rated torque, how to protect it from overheating is a very important issue. In this paper, a simplified thermal model is presented and its implementation is described. The application on a 400 W servomotor shows a good agreement between...
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