| Abstract |
An important and significant class of hybrid systems, also called switching systems, is represented by physical systems with switches. In the electrical domain, switching systems are encountered mainly in power electronics, where the commutating elements are the diodes, the thyristors, IGBTs, etc. Thus, in power electronics applications, systems are operating in commutation, mixing the continuous and the discrete behaviors. The use of hybrid techniques can then constitute an effective method allowing a structured and systematic approach for the modeling, analysis and control. The objective of this paper is to simulate, using a hybrid approach, the behavior of a double resonance generator. This kind of generator is used for medical imagery applications, requiring high tensions, typically 40 kV to 200 kV, associated with high powers (about 100 kW). The proposed method in this paper is a general method, based on the bond graph representation, to obtain a simulation model with Simulink in the event tracking method framework. The simulation is designed as an enumeration of dynamics associated with each configuration of switches, while a Stateflow block ensures the commutation between configurations. The whole system has to respect the necessary conditions for consistency. |
