Design and Implementation of Direct Power Control System for Brushless DC Generator in Standalone DC Applications

Abstract

This paper investigates the design and implementation of direct power control (DPC) strategy for brushless DC (BLDC) generators. Since in conventional BLDC generator systems, electrical power is transferred to the DC-link through uncontrolled diode rectifiers, a great deal of energy may be lost. Moreover, in some applications where the shaft speed of the prime mover is variable, a constant DC-link voltage is essential in spite of the variations of speed and electrical load. To overcome these shortcomings, in this study, through the six-switch power converter, the output power of BLDC generator is controlled via DPC strategy for regulation or tracking of desired DC-link voltage or reference power. Special features of the proposed strategy are: ease of implementation, low cost, and fast response. The proposed control theory is verified by simulations and experiments in various scenarios.

Keywords::

• active rectifier
• brushless DC generator (BLDCG)
• DC voltage regulation
• direct power control (DPC)
• hysteresis controller
• regenerative braking
• voltage space vector

Additional information

Notes on contributors

Abolfazl Halvaei Niasar

Abolfazl Halvaei Niasar received his B.Sc., M.Sc., and Ph.D. degrees in electrical engineering from Isfahan University of Technology (IUT), University of Tehran (UT), and Iran University of Science and Technology (IUST) in 1996, 1999, and 2008, respectively. He is currently working with the Department of Electrical and Computer Engineering, University of Kashan, Kashan, Iran since 2008 as assistant professor. He is a senior member of the Institute of Electrical and Electronics Engineers (IEEE). His current major research interests include PM and brushless DC motor (BLDC) drives; sensorless drives; design, analysis, and control of electrical machines; development of electric vehicles (EVs) and hybrid electric vehicles (HEVs); and industrial control systems engineering.

Majid Moazzemi

Majid Moazzemi received his B.Sc. and M.Sc. degrees electrical engineering from the University of Kashan, Kashan, Iran in 2012 and 2015 respectively. His main research interests are digital design implementation and BLDC motor drives.