Abstract
Summary Mechanical gearboxes in wind power plant have low efficiency, reliability, and high maintenance cost. To overcome these problems, it is substituted by an electric gearbox, ie, electrical variable transmission (EVT). This paper deals with the study of several kinds of EVT and 4 quadrant (4QT) energy transducer which helps in the analysis of the dynamic equations of brushless doubly fed EVT system. Brushless doubly fed electric variable transmission (BL-DF-EVT) can be used as a replacement of mechanical gear in the wind power generation. Proficiency and performance of the electrical variable system can be increased by the use of BL-DF-EVT. As no power-driven part is not present, then it results in negligible mechanical losses which decreases the maintenance cost of the system, and also output speed is greater in contrast with power-driven gear. The dynamic model and operational features of this machine like flux and speeds of inner and outer rotors are illustrated in this paper. MATLAB/Simulink software has been used to simulate the dynamic equations.
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