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In order to improve the starting torque of the soft start of the asynchronous motor and reduce the starting current, a soft starting method from the second frequency to the power frequency starting is proposed. On the basis of this theory, the simulation model of soft start system of asynchronous motor graded frequency conversion control is built by Simulink simulation function of MATLAB. The simulation...
Aiming at the starting problem of motor equipment, this paper studied a large of existing soft start modes and their starting characteristics. Then, using MATLAB/Simulink tool to build common soft start simulation models, this paper got a lot of simulation waveforms. These helped to identify the applicable occasions of these soft starters and their respective advantages and disadvantages. We designed...
The brushless doubly fed machines (BDFM) have been widely researched. The BDFM system has lots of advantages such as brushless, simplicity, robustness and reliability, and a much smaller power electronic converter compared to a conventional AC induction machine. The BDFM as a new type of AC machine and is attractive for converter-fed variable speed drive applications and variable-speed constant-frequency...
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