Abstract
In order to design the control system, it is necessary to have an exact model of buck-boost converter. This paper put forward the transfer function model of buck-boost converter by the state-space average method. The open-loop transfer function model of uncompensated system is deduced according to the mathematic model of the buck-boost converter, the controller is designed according to frequency domain. The phase and magnitude margin of the open-loop system of the buck-boost converter with compensator have both been increased. After compensating, this control system has the advantages of small overshoot and short settling time. It can also improve control system’s real time property and anti-interference ability.
Highlights
With the development of power electronics, switching power supplies are widely used in various occasions, such as cars, ships, aircraft and computers [1]
The circuit of Buck-Boost converter operation can be divided into two distinctive modes: discontinuous conduction mode (DCM) and continuous conduction mode (CCM)
If the value of the inductor L is less than the critical value LC, the buck-boost converter works in discontinuous conduction mode (DCM)
Summary
With the development of power electronics, switching power supplies are widely used in various occasions, such as cars, ships, aircraft and computers [1]. In many applications such as electronic devices in cars, portable devices, etc, where the output voltage range of the battery is considerably large, buck-boost converters are required. Buck-Boost converter with simple structure, easy to implement, etc, has been widely used in various occasions. Buck-Boost converter is a basic topology of DC-DC switching converter. The voltage mode controller is designed to improve the control performance of buck-boost converter
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
