JIC_V1_N2_RP3 Sachin Angadi Satyanarayana Kumari B. H .V. Saikumar Journal on Instrumentation & Control Engineering 2321 – 1148 1 2 14 18 Micro-Stepping, PWM, Solar Tracking and Xilinx ISE This paper discusses FPGA based digital controller designed for solar tracking in satellites. The proposed controller can replace the conventional full-step controller for stepper motor in all positioning applications owing to its increased resolution capability and reduced effect of mid-frequency resonance. The concept of microstepping is discussed using PWM. The design is implemented in Xilinx ISE. Results are presented to show the substantial advantages of the proposed methodology. February - April 2013 Copyright © 2013 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2232