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Abstract
Permanent Magnet Brushless DC (PM-BLDC) motors have become quite widespread and are utilized to serve for a
variety of industrial purposes, because of their simple structure, high reliability and ease of control. Space Vectors
theory is one of the most widely used methods which is implemented for controlling PM-BLDC. Supposing that
each space vector refers to a unique arrangement of switch states, this theory calculates speed (or torque) error and
stator flux error, compared to reference parameters. Consecutively, based on the aforementioned issues the most
appropriate voltage vectors are attained to excite the stator phases. Ripples in speed and torque, are the main
concerns, such methods try to deal with. In this paper, in addition to speed and flux errors, the speed variation slope
is used as an auxiliary control parameter for a more precise speed control and decreasing speed ripples. The
simulation results demonstrate a promising efficacy and accuracy of the proposed method.