TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

 
ISSN (print) 2542-2324 /(online) 2618-8244


Articles of The Transactions of KSRC








New design method for power transformer in contactless charging of storage batteries for undersea robot



Full text article ( in russian)

Year

 
2022

Issue

 
400

Volume

 
2

Pages

 
116-126

Caption

 
New design method for power transformer in contactless charging of storage batteries for undersea robot

Authors

 
Gerasimov V.А., Komlev А.V., Filozhenko А.Yu.

Keywords

 
contactless charging system, undersea robot, high-frequency converter, non-magnetic gap, ampere turns, admissible overheating, design parameters

DOI

 
10.24937/2542-2324-2022-2-400-116-126

Summary

 
Object and purpose of research. The research object is a special power transformer, which is a necessary functional element of the contactless battery charging system for autonomous undersea robots. There are separate primary and secondary parts of the transformer with a non-magnetic gap between windings and center-to-center shift. It is to be taken into account during its design and requires a special purpose method, which is the focus of this study. The suggested method makes it possible to achieve the design parameters for the transformer using a ferrite cup-shaped magnetic conductor optimized for specific power, taking into account onboard undersea robot specifics.
Subject matter and methods. The method suggests a system of relative units with a basic value of the outside core diameter. The method is based on the coefficient of magnetic coupling between windings and relative turn inductance completely defining the transformer electromagnetic properties as a function of relative gap and center-to-center shift between windings [1]. Calculations are done using mathematical modeling in Ansys Maxwell and Solidworks software packages. Design parameters of the transformer to provide maximum charge power are determined by maximum ampere turns related to admissible overheating of magnetic conductor with a full use of magnetic conductor aperture.
Main results. The number of ampere turns and cross-section of windings are calculated, as well as the invertor frequency is determined at a given supply voltage and range of ferrite cup-shaped magnetic conductors. The calculated transformer parameters have to ensure the maximum wattage at admissible overheating of windings and given nonmagnetic gaps and center-to-center shifts. A case study and full-scale experiment has confirmed the choice of solutions and drawn conclusions.
Conclusion. The use of the transformer designed by this method in the system raises the total efficiency of autonomous undersea robots.

Rubrics

 
Ship powering and electric systems

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