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Wearable devices are worn directly on man and one of the most important attribute for wearable devices is “user experience” friendly[1]. Wearable device is small in size, it is difficult to carry large capacity battery. the short duration of the battery and charging difficulties and other issues has become a universal response of all users, which seriously affect the user experience. Wireless energy...
In recent decades, permanent magnet synchronous motor (PMSM) drives have become more widely used for electric vehicles (EVs) due to simple structure, high efficiency and high power density. But the drawback with constant PM flux linkage also brings limitations in the drive application. Two ways can be used to solve the above-mentioned problem, one is that the armature current is utilized to weaken...
This paper presents a Space-Vector Modulated (SVM) Direct-Torque-Control (DTC) scheme for a direct-drive permanent magnet synchronous generator (PMSG) and a gird converter for wind energy without any position sensor. Direct control of the rotating velocity and amplitude of the stator flux vector allows very fast torque response of the PMSG according to the generator speed. Fixed switching frequency...
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