One-cycle controlled DC-DC converters operating with nonlinear power load

This paper applies the one-cycle control method to a boost converter operating with a kind of nonlinear load, constant power load. The constant power load is modeled theoretically, and model parameters are given in quantity. Transfer functions of the boost converter power stage with a constant power load are deducted, and a small-signal model of the one-cycle controlled current inner loop is presented. To maintain the output voltage following the reference accurately, an outer voltage loop with a compensator is constructed. Step responses of the system with different compensators are compared, and the compensator with one zero and two poles are an appropriate selection. Simulation results confirm that the one-cycle controlled boost converter operating with the constant power load can follow the reference stably and rapidly