Title :
Input current shaping in BLDC motor drives using a new converter topology
Author :
Gopalarathnam, Tilak ; Toliyat, Hamid A.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
A new converter topology is proposed for driving a permanent magnet brushless DC (BLDC) motor with unipolar currents. It is based on a single-ended primary inductance converter (SEPIC) operating in the discontinuous conduction mode. In this operation mode, it approximates a voltage follower and the line current follows the line voltage waveform to a certain extent. The reduction in low-order harmonics and improved displacement power factor is achieved without the use of any voltage or current sensors. The simplicity and reduced parts count of the proposed topology make it an attractive low-cost choice for many variable speed drive applications
Keywords :
AC-DC power convertors; DC motor drives; brushless DC motors; harmonic distortion; machine testing; machine theory; permanent magnet motors; power conversion harmonics; power factor correction; rectifying circuits; BLDC motor drives; SEPIC convertor topology; discontinuous conduction mode operation; displacement power factor; line current; line voltage waveform; low-order harmonics; permanent magnet brushless DC motor; single-ended primary inductance converter; unipolar currents; variable speed drive applications; voltage follower; Brushless DC motors; Brushless motors; DC motors; Inductance; Permanent magnet motors; Power system harmonics; Reactive power; Topology; Variable speed drives; Voltage;
Conference_Titel :
Industrial Electronics Society, 2001. IECON '01. The 27th Annual Conference of the IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-7108-9
DOI :
10.1109/IECON.2001.975995
