BLDC motor drive based on current shaping cell converter

Abstract

The Brushless Direct Current (BLDC) motor has advantages like high efficiency and torque, low electromagnetic interference and maintenance, this make it suitable for low power applications, however, the addition of an electronically switching driver induces problems with power quality standards in a PI closed-loop based on Hall effect sensors. This paper presents a typical BLDC drive modified with a cell based on a discontinuous current mode converter with an active shaping technique to manage the DC voltage to feed the IGBT-VSI, power factor and Total Harmonic Distortion (THD) is improved to comply with the IEC 61000-3-2 standard. As a result, stresses on the IGBT semiconductor are reduced. Proposed cell converter design and experimental results are presented.