Outer loop filter for improvement of one‐cycle controller

Abstract

The One‐Cycle Control (OCC) has the ability to operate in line disturbance rejection and provide a faster dynamic response. However, when used as a controller in dc−dc converters, it might contribute to steady‐state error. Furthermore, the non−ideal circuit components may cause a duty cycle error due to the error of converter output voltage. We proposed a new technique to address the error in OCC by using the technique of an outer loop filter based on OCC, called Outer Loop Filter for improvement of One‐Cycle Control (OLF−OCC). This technique maintains a constant output voltage, despite power source voltage perturbation and error from the control circuit, such as circuit integrator voltage slope or input voltage offset. Variation results show that the performance of the proposed technique is more effective and reliable than the traditional approach when compared to the experimental state. OLF–OCC performance is discussed in terms of variation of power source voltage or internal disturbance from the control, such as circuit integrator voltage slope or input voltage offset. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.