G. Spiazzi et al., APPLICATION OF SLIDING MODE CONTROL TO SWITCH-MODE POWER-SUPPLIES, Journal of circuits, systems, and computers, 5(3), 1995, pp. 337-354
Switch-mode power supplies represent a particular class of variable st
ructure systems (VSS). Thus, they can take advantage of non-linear con
trol techniques developed for this class of systems. In this paper the
so called sliding mode control is reviewed and its application to swi
tch-mode power supplies is discussed. Sliding mode control extends the
properties of hysteresis control to multi-variable environments, resu
lting in stability even for large supply and load variations, good dyn
amic response and simple implementation. Application to dc-dc converte
rs, as well as rectifiers and inverters, is analyzed and provisions to
overcome the inherent drawbacks of sliding mode control, i.e. variabl
e switching frequency and possible steady-state errors, are described.
Experimental results are also reported, which allow a comparison betw
een the sliding mode approach and other standard control techniques, e
.g. current-mode control, showing its effectiveness.