A DSP based controller for high-power interleaved boost converters

High power boost converter has become the essential part of the distributed power system that enables energy to be fully utilized in fuel cell powered electric vehicles and stationary power systems. This paper presents a DSP-based fully digital control implementation for an interleaved high power DC-DC boost converter. A dual-loop average current mode current control method is employed to achieve the fast transient response. Different anti-wind up schemes for a typical PI-controller are evaluated through simulations and experiments. Simulation and experiment results of the 20-kW boost converter under a start-up condition and load transient condition are also presented. The results show that this typical controller with proper anti-wind up scheme achieves a better transient performance than without the anti-wind up scheme.