抄録
The DC-DC converter controlled by the integrated-Voltage-Control method works stablely and has no steady state error. The basic circuit of this control method consists of an error voltage integrator and a hysteresis comparator which drives a power transistor to on/off.
In this paper, we propose a new NPC (Neutral-Point-Clamped) Multi-Level Four-Quadrant DC-DC Converter controlled by the Integrated-Voltage-Control method. It consists of eight hysteresis comparators driven in parallel by an error voltage integrator. The operational region of the new converter is divided into eight regions and one of eight power transistors driven by one of eight hysteresis comparators to on/off in each prearranged region on the voltage-current plane. The Neutral-point voltage can be kept at a constant value by a new restrain control scheme also proposed in this paper.
It has been confirmed experimentally that the new NPC converter has no short circuit mode, no steady state error and a quick response time.
