| Abstract |
A design of a control algorithm suitable for UPS systems, called the sliding mode control, is proposed in this paper. The variable structure plant with external disturbances is used to realize a controller in the sliding regime. Invariance of the controlled system in sliding mode for external disturbances will be examined. For the description of the system dynamics under the sliding mode a formal approach called the equivalent control is used. A combined control law is used to assure minimal ripples of the inductor current preserving fast dynamic response of the entire system. A mathematical description, simulations and an experimental result for a single-phase inverter are presented. With new switching devices a very fast response for nonlinear loads, like the computer power supplies, is achieved even for medium power systems. |
