Design of a robust controller for a parallel resonance converter using μ synthesis

Subject Areas : Electronics Engineering

Hossein Rozegar ¹ , Amir Yaghobi ² , Mehrzad Nasiriyan ³

1 - M.Sc. Student of Electrical Engineering, Malek Ashtar University of Technology, Tehran
2 - M.Sc. Student of Electrical Engineering, Malek Ashtar University of Technology, Tehran
3 - Assistant Professor, Faculty of Control, Malek Ashtar University of Technology, Tehran

Received: 2021-05-23 Accepted : 2021-05-23 Published : 2016-10-22

Keywords:

Abstract :

Dc-dc resonator converters have recently received a lot of attention in power supplies. These converters have a great ability to convert energy from one level to another with high performance, which does not have the problems of conventional converters based on the classic PWM method and therefore can be used as smaller and lighter power supplies in aerospace, industrial, and residential applications. Be used. To do this, a suitable control circuit with the ability to keep the desired output voltage constant under different operating conditions is required. For this purpose, small-signal models obtained around the nominal operating point were previously used to keep the output voltage constant in the presence of input perturbations. However, these controllers did not take into account changes in load and orbital elements, so changing them could easily lead to system instability. In this paper, we design a robust controller for this resonant converter using μ synthesis. In addition to ensuring stability for a wide range of load changes, this controller also eliminates input disturbances and adjusts the control input and sitting time well.