Comparative Analysis of Modulation Techniques on the Losses and Thermal Limits of Uninterruptible Power Supply Systems

This paper presents a comparative analysis of electrical losses and subsequent thermal limits of the inverter of UPSs for small office and home office (SOHO) applications. For this, three PWM modulation techniques applied to the full-bridge converter are considered, with power levels of 100–1000 W a...

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Bibliographic Details
Published in:Micromachines (Basel) 2022-10, Vol.13 (10), p.1708
Main Authors: Prado, Edemar O., Bolsi, Pedro C., Sartori, Hamiltom C., Pinheiro, José R.
Format: Article
Language:English
Subjects:
Analysis
Comparative analysis
Computer centers
Electric converters
electrical losses
Load
Metal oxide semiconductor field effect transistors
Methods
modulation
MOSFETs
power MOSFET
Power supply
Pulse duration modulation
Thermal analysis
Transistors
Uninterruptible power supplies
uninterruptible power supply
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Summary:This paper presents a comparative analysis of electrical losses and subsequent thermal limits of the inverter of UPSs for small office and home office (SOHO) applications. For this, three PWM modulation techniques applied to the full-bridge converter are considered, with power levels of 100–1000 W and switching frequencies of 30–120 kHz. To validate the electrical and thermal models, a dSapce MicroLabBox equipment was used to implement modulation techniques on a commercial 1000 W UPS, and a Keysight DAQ970A data logger was used for temperature measurements. As a result, the MOSFET temperatures and losses are obtained for the three modulation techniques evaluated, indicating the best scenario for use and its influence on the UPS autonomy time.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi13101708