Liqiang Yuan

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—This paper proposed an enhanced dc preexcitation for a variable-voltage variable-frequency-controlled induction motor drive system. Voltage vectors were adjusted according to the reac-tive component of the motor current, which promptly established the effective value of the motor flux linkage at the preexcitation stage and restrained its trajectory(More)
Energy resources and their utilization intimately relate to sustainable development. In attaining sustainable development, increasing the energy efficiencies of processes utilizing sustainable energy resources plays an important role. The utilization of renewable energy offers a wide range of exceptional benefits. In this paper an attempt has been made to(More)
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