Abstract
This paper is the design of an induction motor drive system that can be controlled using direct power control. First the possibilities of direct power control (DPC) of induction motors (IMs) fed by a voltage source inverter have been studied. Principles of this method have been separately evaluated. Also the drive system is more versatile due to its small size and low cost. Therefore it is advantageous to use the system where the speed is estimated by means of a control algorithm instead of measuring. This paper proposed one novel induction motor speed control system with fuzzy logic. The estimator was designed and simulated in Matlab/Simulink. Simulation result shows a good performance of speed estimator.
Highlights
The electric drive system is a vital part to drive any motor
It is similar to the well know direct torque control (DTC) method described in the literatures for various AC motors [5]
These results show that the designed estimator properly worked in Matlab/Simulink
Summary
The electric drive system is a vital part to drive any motor. The electric drive system is used to control the position, speed and torque of the electric motors. Direct power control is a control method that directly selects output voltage vector states based on the power and flux errors using hysteresis controllers and without using current loops. In this respect, it is similar to the well know direct torque control (DTC) method described in the literatures for various AC motors [5]. Direct power and flux control (DPFC) of IMs is a control method that directly selects output voltage vector states based on the power and flux errors using hysteresis controllers. In the stator stationary reference frame, the frame rotation speed is zero and the rotor voltage is zero as well (for squirrel-cage IMs), :
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