A maximum power point tracker using positive feedforward control based on the DC motor dynamics and PVM mathematical model

Author

Gonzalez-Llorente, Jesus ; Ortiz-Rivera, Eduardo I. ; Diaz, Andres

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Puerto Rico at Mayaguez, Mayaguez

fYear

2009

fDate

3-6 May 2009

Firstpage

259

Lastpage

264

Abstract

This paper presents a maximum power tracking method for DC motor fed from photovoltaic modules (PVM) through step-down power converter. This method employs positive feedback of motor speed; therefore, only DC motor speed measurements are required. The designed control law is based on mathematical model of DC motor and power converter, and also, variations of optimal maximum power point (MPP) are considered at different values of irradiance. Optimal MPP is approximated by method known as linear reoriented coordinates method (LRCM). Finally, a simple analog circuit is designed and implemented, which calculates optimal duty ratio for power converter according to DC motor speed.

Keywords

DC motors; control system synthesis; feedforward; machine control; photovoltaic power systems; power convertors; velocity measurement; DC motor dynamics; PVM mathematical model; control law design; linear reoriented coordinates method; maximum power point tracker; photovoltaic modules; positive feedforward control; speed measurement; step-down power converter; Circuits; DC motors; DC-DC power converters; Feedback; Magnetic analysis; Mathematical model; Photovoltaic systems; Power system modeling; Solar power generation; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Machines and Drives Conference, 2009. IEMDC '09. IEEE International

Conference_Location

Miami, FL

Print_ISBN

978-1-4244-4251-5

Electronic_ISBN

978-1-4244-4252-2

Type

conf

DOI

10.1109/IEMDC.2009.5075215

Filename

5075215