Abstract
Since it has strong ability to realize a conversion to adapt to a wide variation of input voltage, the double-switch buck-boost (DSBB) converter is usually employed as a front-end converter in two-stage power converter systems, where conversion efficiency is always highly valued. Because there is only one switch in the Pulse Width Modulation (PWM) state in the buck or boost work mode, the combined control scheme was investigated for its advantages in inductor average current and conversion efficiency. However, in this method, the operation mode should be determined by additional logic according to the change of input voltage. Moreover, different control systems should be designed for different operation modes to guarantee dynamic control performance and smooth transition between different work modes. To address these issues, the linear active disturbance rejection control (LADRC) method is introduced to develop an inner current control loop in this paper. In this method, the model deviations in different work modes are considered as a generalized disturbance, and a unified current control plant can be derived for current controller design. Furthermore, the duty cycle limitations in practice are considered, an additional mode for transitional operation is produced, and the corresponding control scheme is also developed. Simulation and experimental test results are provided to validate the correctness and effectiveness of the proposed control scheme.
Highlights
The double-switch buck-boost converter has the ability to convert an input voltage with a wide change range to a desired output voltage, it is usually employed as a front-end converter in two-stage power conversion systems [1], such as in single-phase power factor correction applications [2,3], fuel cell generation [4], solar applications [5], hybrid energy storage systems [6], electric vehicle applications [7], etc
As it is desired that d1 > 1 when the input voltage, vin, is lower than vo
In order to address the issues of relatively complex logic judgment and control system design procedures of double-switch buck-boost (DSBB) converter with combined control strategy
Summary
The double-switch buck-boost converter has the ability to convert an input voltage with a wide change range to a desired output voltage, it is usually employed as a front-end converter in two-stage power conversion systems [1], such as in single-phase power factor correction applications [2,3], fuel cell generation [4], solar applications [5], hybrid energy storage systems [6], electric vehicle applications [7], etc. The synchronization modulation introduced [8] is simplest scheme for double-switch buck-boost converter,method the driving pulses in of Reference. Dueconverter to the direct power transmission modebyinusing this method, the efficiency buck-boost can be enhanced interleaved conversion efficiency of double-switch converter canusing be enhanced by using modulation scheme [10]. Has relatively conversion efficiency and lowercontrol inductor average currentincompared the interleaved andhigher synchronization efficiency and lower inductor average current compared to the interleaved and synchronization modulation methods In this method, there are two separated buck and boost work modes, while only modulation methods.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
