DC/DC Buck Power Converter as a Smooth Starter for a DC Motor Based on a Hierarchical Control

• Published in: IEEE transactions on power electronics Vol. 30; no. 2; pp. 1076 - 1084
• Main Authors: Silva-Ortigoza, Ramon, Hernandez-Guzman, Victor Manuel, Antonio-Cruz, Mayra, Munoz-Carrillo, Daniel
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2015; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Angular velocity; Cascade control; Controllers; dc motor; DC motors; dc/dc Buck power converter; differential flatness; Direct current; Electric currents; Electric motors; Electric potential; hierarchical controller; Mathematical model; Permanent magnet motors; Power converters; Power supply; proportional-integral (PI) control; sliding mode control (SMC); smooth starter; Trajectories; Trajectory; trajectory tracking; Velocity; Voltage; Voltage control
• DOI: 10.1109/TPEL.2014.2311821
• ISSN: 0885-8993

In this paper a smooth starter, based on a dc/dc Buck power converter, for the angular velocity trajectory tracking task of a dc permanent magnet motor is presented. To this end, a hierarchical controller is designed, which is integrated by a control associated with the 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 the output voltage of the dc/dc Buck power converter. In order to assure the latter, a cascade control at the low level is designed, considering a sliding mode control for the inner current loop and a proportional-integral control for the outer voltage loop. The hierarchical controller is tested through experiments using MATLAB-Simulink and the DS1104 board from dSPACE. The obtained results show that the desired angular velocity trajectory is well tracked under abrupt variations in the system parameters and that the controller is robust in such operation conditions, confirming the validity of the proposed controller.