A monolithic peak current-mode buck converter with fast response for high speed DVS application

Yang, Miao; Sun, Weifeng; Xu, Shen; Qin, Changbing; Lu, Shengli

doi:10.1016/j.mejo.2012.12.004

Cited by 4 publications

(1 citation statement)

References 20 publications

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“…The MPPT loop gain transfer function TV1(s) is given by ( 1), where X(s), defined by ( 2), corresponds to the transfer function that relates the current through the inductor (îL) with the SA voltage (𝑣𝑣 �sa), Gdiv1 (3) is the input voltage sense gain, GEA1(s) (4) is the error amplifier transfer function, and Gci(s) is the controller internal current loop transfer function, which calculation is explained in detail in [24] and it is given by ( 5). Further, Gci(s) depends on the control to duty cycle transfer function Fm(s) (6), duty cycle to îL transfer function Gdi(s) (7), the current sensing gain (Ri•Ki), and the inductor current sampling and hold transfer function He(s) (8).…”

Section: Feedback Control Loop Designmentioning

confidence: 99%

High-Reliability Solar Array Regulator for Deep Space Exploration Micro-Satellites

Torres,

Blanes,

Garrigós

et al. 2023

IEEE Access

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This work presents a single point failure free solar array regulator design for scientific deep space exploration micro-satellites, where reliability and fault tolerance are critical design aspects. The proposed regulator is composed by six independent dc/dc Buck converters controlled by a double control loop, which can control both the battery end-of-charge voltage if the battery is fully charged, or the power generated by the solar arrays otherwise. Besides, to optimize the extracted power, each phase has an analog maximum power point tracker circuit. In addition, the regulator has a redundant over voltage protection circuit that switches off the converters in case of battery overvoltage. Furthermore, this regulator is tolerant to the failure of any component. This paper describes the electronic design of the regulator, including a detailed system stability study, as well as the implementation of a 60W prototype and the tests that have been carried out to validate the design. The main contributions of this paper are: A practical solution for a solar array regulator for space applications is proposed; a detailed stability study is developed; a overvoltage protection circuit is presented; a prototype has been implemented using commercial off-the-shelf (COTS) components with space qualified equivalent versions; and extensive functional tests have been carried out under different space representative conditions to validate fault tolerance and robustness.INDEX TERMS Fault-tolerant regulator, maximum power point tracker (MPPT), microsatellite power system, solar array regulator.

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Section: Feedback Control Loop Designmentioning

confidence: 99%