Simulation of DC Link Capacitor Free BLDC Motor
Drive using Different Current Controllers
Journal:
GRENZE International Journal of Engineering and Technology
Authors:
Elsarani Jose, Anna Mathew
Volume:
3
Issue:
2Special Issue
Grenze ID:
01.GIJET.3.2Special Issue
Pages:
114-121
Abstract
A DC link capacitor is an integral component of every BLDC motor drive. It is
rated for a lower number of operating hours in comparison to other components used in the
circuit. In addition, the lifetime of electrolytic capacitors is severely affected by the ambient
operating temperature. As such, the DC link capacitor is considered to be a frequent
component of failure. Therefore, the inclusion of the capacitor reduces the durability of the
motor drive, particularly in hot or cold environments. Excluding DC link capacitor from the
drive yields additional advantages like cost reduction and overall reduction in the area of
the printed circuit board. However such a setup gives rise to torque ripples, which causes
vibrations and acoustic noise in the drive. This paper focus on a compensation method to
reduce the ripples for smooth operation of the drive. Simulations using different controllers
are done and their performances are compared.