International Journal of Applied Engineering Research

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Discrete-time Averaging of Continuous Conduction Mode PWM DC-DC Converters with Feedback considering Conduction Losses


Affiliations
1 Electrical Engineering Department, King Saud University, P. O. Box 800, Riyadh 11421, Saudi Arabia
     

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This paper extends the results of discrete-time averaged model presented before to include the effect of feedback loop in the PWM system. This model provides the exact one-cycle-average (OCA) values of the output signal with the presence of feedback even at low switching frequency. This model also provides the accurate OCA values considering non-ideality in the switching stage components. In addition, this model presents the OCA values, taking into account the conduction losses according to the energy conservation principle. A comparison of proposed model to other existing models is presented through a numerical example of boost converter. Detailed simulation results confirm the better accuracy and speed of the proposed model.

Keywords

Switched Systems, Sampled-data Model, Pulse Width Modulated (PWM) Converter, Closed-loop Simulation, Averaged Model
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  • Discrete-time Averaging of Continuous Conduction Mode PWM DC-DC Converters with Feedback considering Conduction Losses

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Authors

Mohammed S. Al-Numay
Electrical Engineering Department, King Saud University, P. O. Box 800, Riyadh 11421, Saudi Arabia

Abstract


This paper extends the results of discrete-time averaged model presented before to include the effect of feedback loop in the PWM system. This model provides the exact one-cycle-average (OCA) values of the output signal with the presence of feedback even at low switching frequency. This model also provides the accurate OCA values considering non-ideality in the switching stage components. In addition, this model presents the OCA values, taking into account the conduction losses according to the energy conservation principle. A comparison of proposed model to other existing models is presented through a numerical example of boost converter. Detailed simulation results confirm the better accuracy and speed of the proposed model.

Keywords


Switched Systems, Sampled-data Model, Pulse Width Modulated (PWM) Converter, Closed-loop Simulation, Averaged Model

References