State-space Modelling and Digital Controller Design for DC-DC Converter
Abstract: The recent
development in digital technology offers better platform for easy
implementation of advance control algorithm in power converter design making
digital control a viable alternative to analoguecounterpart. Controller design
for power converters has been very challenging due to non-linear characteristics
of power switches, the supply voltage variability, load current changes and
circuit element variation. This paper presents dynamic averaged state-space
modelling of non-ideal dc-dc boost converter with parasitic and digital
controller design for boost converter using digital redesign and direct digital
design methods. The system was simulated in Matlab/Simulink to investigate the
dynamic performance of the two controllers’ transient response, control
bandwidth and response to variable supply voltage. The results demonstrated
fast transient and wide control bandwidth for tight voltage regulation to
variable input voltage.
Keywords: dc-dc converter,
state-space model, digital compensator, closed loop response, control bandwidth
Author: Oladimeji Ibrahim
Journal Code: jptkomputergg160246
