Original scientific paper

https://doi.org/10.7305/automatika.2016.01.1053

A Novel and Simple Hybrid Fuzzy/PI Controller for Brushless DC Motor Drives

Adeel Sabir orcid.org/0000-0002-1010-9101 ; King Fahd University of Petroleum and Minerals, 34464, Dhahran, Saudi Arabia
Mahmoud Kassas ; King Fahd University of Petroleum and Minerals, 34464, Dhahran, Saudi Arabia

Abstract

A novel speed controller for the trapezoidal three--phase Brushless DC (BLDC) Motor Drive is proposed using a hybrid fuzzy logic and proportional plus integral (PI) control. The fuzzy logic control structure is different from conventional fuzzy logic implementations such that it only uses three simple rules based on speed error being either in the positive, negative or zero regions. The controller outputs a reference current, that is enforced through the motor phases by pulsewidth modulation (PWM) control. The proposed fuzzy logic controller can be used individually in applications requiring lower computation load and accepting small steady state offset. For high performance applications requiring offset free tracking, a PI controller is augmented with the fuzzy logic controller and a simple switching scheme is devised based on error variance to switch the active controller based on operating conditions. The response of the drive system under the proposed composite control structure is compared with the conventional PI based and the sliding mode controllers to demonstrate its improved performance. Simulations studies using detailed models in MATLAB/Simulink's Simpowersystems toolbox are carried out to show the validity of proposed control.

Keywords

BLDC Motor; Fuzzy Logic; Speed Control; Hybrid Control

Hrčak ID:

154031

URI

https://hrcak.srce.hr/154031

Publication date:

19.2.2016.

Article data in other languages: croatian

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