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Compared to conventional mechanical gears, field modulated magnetic gears (FMMG) have certain potential for torque and speed transmission in practical engineering in that its merits of intrinsic overloading protection feature and non contacted configuration. However, FMMG always experience oscillations due to their non-rigid magnetic coupling between two rotors while starting and changes in speed...
Full converter wind turbines respond somewhat differently than directly-connected machines to short circuit conditions. In distinction with directly-connected machines, full-converter wind turbines have a controlled response to system short circuits. Consequently, they do not behave quite like a voltage behind a reactance, as conventional synchronous or asynchronous machines do. Also, they do not...
It is shown that a linear strictly unstable system with actuation limits can not be stabilized globally, regardless of whatever control methodology is applied. This has important implications for control practices, especially for the control of unstable plants whose dynamics may vary abruptly during operation. It also implies that a feedback controller should be stable by itself, which further aggravates...
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