SSPC model with variable reset time, environmental temperature compensation and thermal memory effect

Solid State Power Controller (SSPC) is being utilized in Spacecraft and Aircraft Power Distribution System in order to replace conventional electro-mechanical circuit like breakers, contactors and relays. Since power distribution on-board systems are very complex, SSPC models play an important role in order to predict the real behaviour and to avoid design fails in future applications. The main aim of this paper is to obtain a generic SSPC model based on datasheets provided by manufacturers. This model has to take into account the current-squared-time curve (I2t), the environmental temperature, the thermal memory effect and the reset time. With this model it is possible to simulate and to analyze the influence of the switching of different types of loads in a power distribution system, in order to predict future problems. In addition, the model can guide SSPC designer to optimize better component performance. The SSPC model has been validated by means of simulation and experimental measurement.