TY - JOUR
T1 - Design of practical sliding-mode controllers with constant switching frequency for power converters
AU - Navarro-López, Eva M.
AU - Cortés, Domingo
AU - Castro, Christian
N1 - Funding Information:
This work was partially supported by CONACYT Mexico under contract 44969.
PY - 2009/5
Y1 - 2009/5
N2 - A novel experimentally motivated method in order to design a family of easy-to-implement sliding-mode controllers for power converters is proposed. Two main results are presented. First, the relation between sliding-mode control and average control is reinterpreted so that the limitation of the switching frequency for the closed-loop system is achieved in a more direct way than other methods so far reported in the literature. For this purpose, a class of sliding surfaces which makes the associated equivalent control be the system average control is proposed. Second, the achievement of a constant switching frequency in the controlled system is assured without requiring the sliding-mode-based controller to be modified, unlike most previous works. As a result, the proposed sliding surfaces-type can be directly implemented via a pulse-width modulator. The control methodology is implemented for the voltage control in a boost converter prototype in which the load is considered unknown. Experimental results confirm high performance and robustness under parameters variation. Furthermore, the solution proposed is easy to implement and well-suited for other power converters.
AB - A novel experimentally motivated method in order to design a family of easy-to-implement sliding-mode controllers for power converters is proposed. Two main results are presented. First, the relation between sliding-mode control and average control is reinterpreted so that the limitation of the switching frequency for the closed-loop system is achieved in a more direct way than other methods so far reported in the literature. For this purpose, a class of sliding surfaces which makes the associated equivalent control be the system average control is proposed. Second, the achievement of a constant switching frequency in the controlled system is assured without requiring the sliding-mode-based controller to be modified, unlike most previous works. As a result, the proposed sliding surfaces-type can be directly implemented via a pulse-width modulator. The control methodology is implemented for the voltage control in a boost converter prototype in which the load is considered unknown. Experimental results confirm high performance and robustness under parameters variation. Furthermore, the solution proposed is easy to implement and well-suited for other power converters.
KW - Discontinuous control
KW - Nonlinear systems
KW - Power converters
KW - Pulse-width modulation
KW - Sliding-mode control
UR - http://www.scopus.com/inward/record.url?scp=60849102126&partnerID=8YFLogxK
U2 - 10.1016/j.epsr.2008.10.018
DO - 10.1016/j.epsr.2008.10.018
M3 - Artículo
SN - 0378-7796
VL - 79
SP - 796
EP - 802
JO - Electric Power Systems Research
JF - Electric Power Systems Research
IS - 5
ER -