Title :
A variable voltage converter topology for permanent-magnet brushless DC motor drives using buck-boost front-end power stage
Author :
Lee, Byeong-Seok ; Krishnan, R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
A variant of a low cost, four-quadrant converter topology for permanent magnet brushless DC (PMBDC) motor drives is proposed in this paper. It has the advantage of variable DC input voltage to the machine through a buck-boost front-end power stage and hence low torque ripple at very low speeds, a desirable feature in high performance applications. It has a fixed commutation voltage, which is equal to the DC source voltage. Further, it is proved that the proposed power converter topology will enable the maximum extraction of power from PMBDC motor drives. In addition, the energization and commutation of machine phases can be achieved independently. Because of these features, the proposed topology provides high operational reliability for the motor drives
Keywords :
DC motor drives; DC-DC power convertors; brushless DC motors; closed loop systems; commutation; control system analysis; electric current control; machine control; machine theory; permanent magnet motors; switching circuits; velocity control; voltage control; buck-boost front-end power stage; commutation voltage; energization; four-quadrant converter topology; low-speed torque ripple; operational reliability; permanent-magnet brushless DC motor drives; variable DC input voltage; variable voltage converter topology; Brushless DC motors; Circuit faults; Circuit topology; Commutation; Costs; Motor drives; Reluctance motors; Switches; Switching converters; Voltage;
Conference_Titel :
Industrial Electronics, 1999. ISIE '99. Proceedings of the IEEE International Symposium on
Conference_Location :
Bled
Print_ISBN :
0-7803-5662-4
DOI :
10.1109/ISIE.1999.798696