17-08-2012, 05:14 PM
Sensor less Direct Field Oriented Control of Three-Phase Induction Motor Drives for Low Cost Applications
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Abstract
A Sensor less Direct Rotor Field Oriented Control (SDRFOC) scheme of three-phase induction motors for low cost applications is presented in this paper.
The SDRFOC algorithm is based on a sensor less rotor flux closed-loop observer whose main advantages are its simplicity and robustness to motor parameter detuning.
The whole algorithm has been developed and implemented on a low-cost fixed-point DSP controller.
CONCLUSIONS
The paper deals with an SDRFOC scheme for three-phase induction motor drives employed in low-cost applications.
A sensor less closed-loop rotor flux observer has been used for rotor flux estimation.
The observer is very simple to implement and for this reason could be an attractive solution to replace the traditional V/Hz algorithms thus the motor exploitation (torque, power factor) and drive efficiency are improved.