Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Sensorless Passivity Based Control of a DC Motor via a Solar Powered Sepic Converter-Full Bridge Combination

  • Linares-Flores, Jesus (Instituto de Electronica y Mecatronica, Universidad Tecnologica de la Mixteca) ;
  • Sira-Ramirez, Hebertt (Centro de Investigacion y de Estudios Avanzados del IPN CINVESTAV) ;
  • Cuevas-Lopez, Edel F. (Instituto de Electronica y Mecatronica, Universidad Tecnologica de la Mixteca) ;
  • Contreras-Ordaz, Marco A. (Instituto de Electronica y Mecatronica, Universidad Tecnologica de la Mixteca)
  • Received : 2010.11.04
  • Published : 2011.09.20
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Abstract

This article deals with the sensor-less control of a DC Motor via a SEPIC Converter-Full Bridge combination powered through solar panels. We simultaneously regulate, both, the output voltage of the SEPIC-converter to a value larger than the solar panel output voltage, and the shaft angular velocity, in any of the turning senses, so that it tracks a pre-specified constant reference. The main result of our proposed control scheme is an efficient linear controller obtained via Lyapunov. This controller is based on measurements of the converter currents and voltages, and the DC motor armature current. The control law is derived using an exact stabilization error dynamics model, from which a static linear passive feedback control law is derived. All values of the constant references are parameterized in terms of the equilibrium point of the multivariable system: the SEPIC converter desired output voltage, the solar panel output voltage at its Maximun Power Point (MPP), and the DC motor desired constant angular velocity. The switched control realization of the designed average continuous feedback control law is accomplished by means of a, discrete-valued, Pulse Width Modulation (PWM). Experimental results are presented demonstrating the viability of our proposal.

Keywords

References

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