Energy aspects are fundamental to the design of electric drive systems. This article describes energy performance for asynchronous electric drives based on various control methods. These electric drives comparison shows that vector control methods have a significant advantage over scalar control methods. The asynchronous electric drive mathematical description is based on vector control theory and main component method. Equations, obtained by mathematical description, allow calculating of the currents, voltages and electric power at the output when the electromagnetic torque and speed machine are set. Energy characteristics of the asynchronous drive were obtained with the use of the MATLAB-SIMULINK simulation program.
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