en Electrical Drives Electrical Drives Research Paper Research Paper In this paper, one-cycle control (OCC), as a constant-frequency PWM control strategy for current control of a six-switch brushless dc (BLDC) motor drive is investigated. Developed current regulator is a unified controller and PWM modulator. Employing the one-cycle control strategy, decreases the torque ripple resulted from the conventional hysteresis current controllers and therefore, the vibration and acoustic noise of the drive are reduced. Total operations of the system control and OCC strategy are realized by a low-cost general-purpose AVR microcontroller (Atmega8) that leads to a low-cost, high performance BLDC motor drive. Computer simulations using Matlab simulator, have been presented to show the good characteristics of this solution. Furthermore, experimental works show the excellent behavior of developed BLDC drive and agreement with simulation results. BLDC Motor,Drive,One-Cycle Control (OCC),AVR Microcontroller, 244 249 http://ijeee.iust.ac.ir/browse.php?a_code=A-10-1054-1&slc_lang=en&sid=1 A. Halvaei Niasar halvaei@kashanu.ac.ir 180031947532846002932 180031947532846002932 Yes Faculty of Electrical and Computer Engineering,University of Kashan E. Boloor Kashani boloor@grad.kashanu.ac.ir 180031947532846002933 180031947532846002933 No Faculty of Electrical and Computer Engineering,University of Kashan