Adaptive hysteresis-band current controller Online publication date: Mon, 31-Mar-2014
by Rami A. Maher; Walid Emar; Jalil H. Amjad
International Journal of Power and Energy Conversion (IJPEC), Vol. 4, No. 4, 2013
Abstract: One of the most complicated control problems in variable speed AC drives is the difficulty of processing feedback signal of the outer loop in the presence of harmonics. However, conventional fixed band hysteresis controller has a variable switching frequency throughout the fundamental period. A variable-hysteresis-band controller comes as a solution to reach an optimal ripple current. An improved implementation of the constant frequency hysteresis current control of three phase voltage-source inverters is presented. A simple, self-adjusting analogue prediction of the hysteresis band is added to the phase-locked-loop control to ensure constant switching frequency, even at a high rate of output voltage change. This allows high accuracy in tracking highly distorted current waveforms and minimises the ripple in multiphase systems. In this paper, the basic principles are described, and a detailed stability analysis is done. The control performance is illustrated, both by simulated and experimental results.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Power and Energy Conversion (IJPEC):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook