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Vector control is a most effective strategy to achieve rapid and accurate torque/speed control of AC motors. Its principle is to identify the machine rotor flux axis, and to then use this knowledge to control in-phase and quadrature current components to achieve precise torque control under varying load conditions. Accurate current regulation is essential for good vector control. However, while AC...
The maximum output torque developed by the machine is dependent on the allowable current rating and maximum voltage that the inverter can supply to the machine. Therefore, to use the inverter capacity fully, it is desirable to use the control scheme considering the voltage and current limit condition, which can yield the maximum torque per ampere over the entire speed range. This controller is controlled...
The paper discusses the design of synchronous reference frame current controllers for a sensorless induction motor (IM) drive that operates in speed regulation mode or torque control mode. In most IM implementations, PI controllers alone are used for current regulation because of convenience. The reference values fed in the current controllers are either preselected or are synthesized by flux, speed...
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