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To analyze the steady state equivalent circuit model of an induction motor to establish the equation that justify the use of a constant V/f speed control of open loop and closed loop control. The main objective is to maintain the speed at fixed reference. To investigate the control schemes for controlling induction machine, particularly the scalar control and vector control method and to evaluate...
Different techniques for the asymmetries in the rotor of asynchronous machines in closed-loop controlled drives have been developed; they usually need to monitor currents and speed. This paper investigates the detection of rotor asymmetries in field oriented controlled induction machines based only on the measured currents and without the measurement of the speed. The paper uses the indicator for...
Mathematical modelling, design and development of ldquoa variable speed constant frequency self-excited induction generator (IG)rdquo using field-oriented techniques for its voltage and frequency control is described. A space-phasor model for the generator is developed to implement Indirect Field Oriented Control. To study the generator dynamic response the machine was driven by a separately-excited...
The mathematical model of linear induction motor (LIM) based on slip frequency type vector control system is established. A self-adjusting fuzzy controller (SAFC) is designed as magnetic thrust adjuster of the motor. The speed of the motor is adjusted by control magnetic thrust of the motor. The scheme of the slip frequency type vector control system of the LIM is obtained by observing the magnetic...
This paper proposes to simulate the characteristics of wind turbine by PMSM (permanent magnet synchronous motor). On the aspects of wind turbine power-speed curve and torque-speed curve as well as PMSM open-loop and closed-loop control, the characteristics of wind turbine and PMSM are compared and analyzed. PMSM can simulate part of characteristics of wind turbine by open-loop frequency control, and...
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