Title:
DELTA CONNECTED RESONANT TURN OFF CIRCUITS
Document Type and Number:
WIPO Patent Application WO/2022/106900
Kind Code:
A3
Abstract:
A static transfer switch is provided for supplying power to a load alternately from two different power sources. Switching between the two power sources may occur within a fraction of one electrical cycle. In response to sensing degraded performance in the power source supplying the load, resonant turn off circuits connected directly to the main switches of two phases of the power source are actuated to commutate the respective main switches. The main switch of the third phase is commutated with one or more of the resonant turn off circuits through the delta side of a transformer connected to the three phases of the power source.
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Inventors:
BOSE VEERAKUMAR (US)
KENDZIA III THOMAS (US)
BELCASTRO CHRISTOPHER (US)
KENDZIA III THOMAS (US)
BELCASTRO CHRISTOPHER (US)
Application Number:
PCT/IB2021/000809
Publication Date:
June 30, 2022
Filing Date:
November 18, 2021
Export Citation:
Assignee:
ABB SCHWEIZ AG (CH)
International Classes:
H02J9/06; G06F1/28
Domestic Patent References:
| WO2000048287A1 | 2000-08-17 |
Other References:
PO-TAI CHENG ET AL: "Design of an Impulse Commutation Bridge for the Solid-State Transfer Switch", IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 44, no. 4, 1 July 2008 (2008-07-01), pages 1249 - 1258, XP011231794, ISSN: 0093-9994, DOI: 10.1109/TIA.2008.926311
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