Cascaded pulse width modulation converter control

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United States of America Patent

PATENT NO 11784583
APP PUB NO 20220216803A1
SERIAL NO

17601312

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Abstract

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An electrical converter includes a main converter for generating a first output voltage and a converter cell for converting the first output voltage into a second output voltage. A method for operating an electrical converter includes: receiving a reference voltage for the electrical converter; pulse width modulating the reference voltage with a first modulation frequency for generating a first switching signal for the main converter; switching the main converter with the first switching signal to generate the first output voltage; estimating the first output voltage from the first switching signal; determining a voltage error by subtracting the estimated first output voltage from the reference voltage; pulse width modulating the voltage error with a second modulation frequency, which is higher than the first modulation frequency, for generating a further switching signal for the converter cell; and switching the converter cell with the further switching signal to generate the second output voltage.

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Patent Owner(s)

Patent OwnerAddress
ABB SCHWEIZ AG5400 BADEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Geyer, Tobias Ennetbaden, CH 26 199
Schweizer, Mario Rütihof, CH 16 26
Tsoumas, Ioannis Zürich, CH 7 7

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