A Novel Speed Control Technique for A Buck Power Converter Driven DC Motor
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 1
Abstract
A DC motor is an electrical machine that converts direct current electrical power in to mechanical power. The speed of a DC motor can be controlled by changing the voltage applied to the armature. The parameter which includes speed, voltage, and current of a DC machine is controlled using DC/DC buck power converter. This paper deals with a Hierarchical control system which involves three stages to control the parameters of DC motor. This Hierarchical controller is designed with a control associated with DC motor based on differential flatness at the high level ,and a control related with the DC/DC Buck converter based on a cascade control scheme at the low level. The control at the high level allows the DC motor angular velocity to track a desired trajectory and also provides the desired voltage profile that must be tracked by output voltage of the DC/DC Buck power converter. The lower level cascade control is designed by considering sliding mode control for inner current loop and PI control for the outer voltage loop. This control strategy is tested through experiments using Mat lab- Simulink. The obtained results show that the desired the voltage profile is well tracked under abrupt variations in the system parameters and that the controller is robust in such operation conditions.
Authors and Affiliations
Sangeetha . C. N, S Gayathri, K Rama
Keywords
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- EP ID EP393417
- DOI 10.9790/9622-0801037376.
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