Indian Journal of Science and Technology

Abstract

Objectives: To design a new converter topology based on boost converter to obtain essential control characteristics of a DC drive. Methods/Statistical analysis: The developments in power electronics based industry/technology and development in new converter design strategies, the speed of DC motor can be maintained at required level by maintaining the voltage across armature. The closed loop control scheme with proportional plus integral (PI) controller takes speed reference and the actual speed of DC motor as input parameters and generates the pulses to control the boost converter output voltage. Findings: With this, the speed of DC motor can be maintained at the required speed. The effectiveness of closed loop control scheme with PI controller is compared with that of open loop control scheme. The analysis presented in this paper is mainly concentrated to obtain the suitable operational changes pertaining to various input and output parameters such as output voltage, input and output currents, speed, torque and output powers are analyzed for different load uncertainties. The complete design procedure of converter, analysis of load uncertainties is presented with supporting graphical and as well as numerical results. Application/Improvements: This converter design procedure can be applicable to control the speed of DC motor as per the application. With this procedure, the ripple factor and the converter losses can be decreased which results in improvement of converter efficiency.

Keywords: Boost Fed DC Drive, Closed Loop Operation, Converter Design, Converter Losses, Load Uncertainties