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LUND UNIVERSITY LIBRARIES

DC-DC capacitor precharger

Bydén, Hannes LU and Lundström, Alexander (2020) In CODEN:LUTEDX/TEIE EIEM01 20201
Industrial Electrical Engineering and Automation
Abstract
This study evaluates the possibility of charging large capacitors to high voltages within short time frames. The system is designed to charge a capacitor of 4 mF from 0 to 850 V in one second by connecting a 24 V lead acid car battery to a flyback converter. Simulation has shown that this is possible using as little as four transistors as long as proper cooling is provided. The charge sequence could then be executed multiple times per minute. Simulation results based on three different control algorithms are presented.
A prototype based on the simulations has been built and tested. The prototype managed to charge a 0.5 mF capacitor from 0 to 600 volts in one second without generating excessive heat.
Noise in the circuit and lacking lab... (More)
This study evaluates the possibility of charging large capacitors to high voltages within short time frames. The system is designed to charge a capacitor of 4 mF from 0 to 850 V in one second by connecting a 24 V lead acid car battery to a flyback converter. Simulation has shown that this is possible using as little as four transistors as long as proper cooling is provided. The charge sequence could then be executed multiple times per minute. Simulation results based on three different control algorithms are presented.
A prototype based on the simulations has been built and tested. The prototype managed to charge a 0.5 mF capacitor from 0 to 600 volts in one second without generating excessive heat.
Noise in the circuit and lacking lab equipment hindered testing with higher power and higher voltages (Less)
Popular Abstract
The most important aspects of electric vehicles are their
reliability and readiness to use. In order to ensure this
reliability the high voltage systems must have plenty
of protective electronics that ensure safe operation. The
system that we developed enables these protections.
Please use this url to cite or link to this publication:
author
Bydén, Hannes LU and Lundström, Alexander
supervisor
organization
course
EIEM01 20201
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
capacitor charger flyback converter
publication/series
CODEN:LUTEDX/TEIE
report number
5452
language
English
id
9029877
date added to LUP
2021-04-26 13:09:36
date last changed
2021-04-26 13:09:36
@misc{9029877,
  abstract     = {{This study evaluates the possibility of charging large capacitors to high voltages within short time frames. The system is designed to charge a capacitor of 4 mF from 0 to 850 V in one second by connecting a 24 V lead acid car battery to a flyback converter. Simulation has shown that this is possible using as little as four transistors as long as proper cooling is provided. The charge sequence could then be executed multiple times per minute. Simulation results based on three different control algorithms are presented.
A prototype based on the simulations has been built and tested. The prototype managed to charge a 0.5 mF capacitor from 0 to 600 volts in one second without generating excessive heat.
Noise in the circuit and lacking lab equipment hindered testing with higher power and higher voltages}},
  author       = {{Bydén, Hannes and Lundström, Alexander}},
  language     = {{eng}},
  note         = {{Student Paper}},
  series       = {{CODEN:LUTEDX/TEIE}},
  title        = {{DC-DC capacitor precharger}},
  year         = {{2020}},
}