Fuzzy Logic Controller for Four Quadrant Operation of Three Phase BLDC Motor
Abstract— Brushless DC (BLDC) motors are one of the electrical drives that are rapidly gaining popularity in industries. In this paper, proposed system gives a three phase Brushless DC (BLDC) in all four quadrant operation by using fuzzy logic controller. The average settling time delay in conventional PI controller drastically overcome by the fuzzy logic controller in order to achieve the constant speed of the motor in any one of the direction respectively. The back EMF is generated during the reverse motoring. In quadrant operation the breaking is applied leads to waste the kinetic energy as heat energy. Utilization of wasted kinetic energy is stored in a battery possible by proposed scheme. The four quadrant operations are Forward Motoring, Forward Braking, Reverse motoring and Reverse Braking. In forward driving the input feed to the BLDC motor up to the set time fastened. Subsequently the Forward Braking is applied then the motor speed reduced to zero. This helps to create a back emf and that is being converted to DC and stored in a battery. Then the Reverse Motoring is applied for rotating the motor at the reverse direction. At last the Reverse Braking is applied it also create the back emf and the converted energy stored in a battery. Rotor position is obtained by the Hall Sensor signal. The system consist of Input source, Fuzzy logic controller, Three phase inverter, Relay, Brushless DC motor (BLDC), Battery, Hall sensor.
Index Terms- Brushless DC motor (BLDC), Fuzzy Logic Controller, Four quadrant operation, Regenerative Braking, Utilize the wasted kinetic energy.
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International Journal for Trends in Technology & Engineering © 2015 IJTET JOURNAL