Sliding Mode Controller Applied to PWM DC-DC Converters Based on an Averaged Model

A modeling methodology applied to PWM DC-DC converters is presented in this paper. Parasitic resistors have been considered in inductor and power supply. A generalised equivalent circuit based on averaged variables is obtained for the basic structures of DC-DC converters. This circuit and the associ...

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Bibliographic Details
Main Authors: Jaen, C., Pou, J., Pindado, R., Sala, V., Zaragoza, J.
Format: Conference Proceeding
Language:English
Subjects:
control systems
Converter control
DC-DC power converters
Diodes
Equivalent circuits
Inductors
Modeling
Power supplies
Pulse width modulation
Pulse width modulation converters
Resistors
Sliding mode control
variable structure systems
Voltage control
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Description
Summary:A modeling methodology applied to PWM DC-DC converters is presented in this paper. Parasitic resistors have been considered in inductor and power supply. A generalised equivalent circuit based on averaged variables is obtained for the basic structures of DC-DC converters. This circuit and the associated model are valid for continuous conduction mode and discontinuous conduction mode. This contribution contains expressions to detect changes of the converter operation mode and to estimate the value of the diode duty cycle operating under discontinuous conduction mode. A sliding mode controller for the regulation of the output voltage has been designed in terms of averaged state variables and converter parameters. The procedure is applied to a 100 W Buck converter prototype. Simulations and experimental results are presented.
ISSN:2166-9538
2166-9546
DOI:10.1109/CPE.2007.4296567