Browse > Article
http://dx.doi.org/10.5370/KIEE.2017.66.11.1663

Driving System of 7-Phase BLDC Motor Speed Control by Fuzzy Controller  

Yoon, Yong-Ho (School of Electrical Engineering, Gwangju University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.66, no.11, 2017 , pp. 1663-1668 More about this Journal
Abstract
A BLDC motor with higher number of phases has several advantages, compared to the conventional three-phase BLDC motors. It can reduce the commutation torque ripple and the iron loss without increasing the voltage per phase and increase the reliability and power density. Higher number of phases increase the torque-per-ampere ratio for the same machine volume and output power by widening the electrical conduction period. In this paper, the proposed seven-phase BLDC motor drive system is made into several functional modular blocks, so that it can be easily extended to other ac motor applications: back-EMF block, hysteresis current control block, pwm inverter block, phase current block, and speed/torque control block. Also in a system of BLDC motor drive, the PI controller has been widely used in the speed controller because of the simple implementation. To obtain a good speed response in a general drive system using the PI controller, the high bandwidth of a controller is established. therefore, in this paper, a Fuzzy controller is applied to the 7-phase BLDC motor drive system in order to improve the speed control performance. The Fuzzy controller is compared with a conventional PI controller through the experiment with respect to speed dynamic responses. These experimental results show that the Fuzzy controller of the 7-phase BLDC motor drive system is superior over the conventional PI controller. The algorithm using the Fuzzy controller can improve a comfortable ride in the field of high performance 7-phase BLDC motor drive applications.
Keywords
7-phase BLDC motor; Speed control; Fuzzy controller; PI Controller; Hysteresis current control;
Citations & Related Records
연도 인용수 순위
  • Reference
1 M.G. Simoes and P. Vieira, "A High-Torque Low -Speed Multiphase Brushless Machine-A Perspective Application for Electric Vehicles," IEEE Trans. on Industry Electronics, vol. 49, no 5, pp. 1154-1164, 2002.   DOI
2 M. Godoy Simoes and P Vieira Jr.,"A Five-Phase Brushless DC-Machine Direct Drive System," European Power Electronics and Drives, vol. 14, no. 5, pp.15-24, 2004.
3 T. Y. Kim, B. K. Lee, and C. Y. Won, "Modeling and Simulation of Multiphase BLDC Motor Drive Systems for Autonomous Underwater Vehicles," in Proc. IEEE International Electric Machines and Drives Conference, vol. 2, pp. 1366-1371, 2007.
4 L. Parsa, and H. A. Toliyat, "Five-Phase Permanent - Magnet Motor Drives," IEEE Trans. on Industry Applications, vol. 41, no. 1, pp. 30-37, 2005.   DOI
5 T. H. Kim, H. W. Lee and Ehsahi, "Advanced Sensorless Drive Technique for Multiphase BLDC Motor," Industrial Electronics Society, vol. 1, pp. 926-931, 2004.
6 Fernando Rodriguez and Ali Emadi, "A Novel Digital Control Technique for Brushless DC Motor Drives," IEEE Trans. on Industrial Electronics, vol. 54, no. 5, pp. 2365- 2373, 2007.   DOI