US 11,758,701 B2
Power supply fan management
Lee Roy Mantell, Essex, MD (US); Karunakar Reddy Gujja, Elkridge, MD (US); and Roger Clinton Williamson, IV, Baltimore, MD (US)
Assigned to The ESAB Group, Inc., North Bethesda, MD (US)
Filed by The ESAB Group, Inc., Florence, SC (US)
Filed on Jan. 25, 2021, as Appl. No. 17/156,714.
Application 17/156,714 is a continuation of application No. 16/397,026, filed on Apr. 29, 2019, granted, now 10,939,593.
Prior Publication US 2021/0219469 A1, Jul. 15, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H05K 7/20 (2006.01); F04D 27/00 (2006.01); G05B 15/02 (2006.01); H02M 7/42 (2006.01); H02M 7/02 (2006.01)
CPC H05K 7/20945 (2013.01) [F04D 27/004 (2013.01); G05B 15/02 (2013.01); H05K 7/20909 (2013.01); H02M 7/02 (2013.01); H02M 7/42 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power supply, comprising:
a casing;
an AC-to-DC converter;
an inverter electrically coupled to the AC-to-DC converter;
a transformer having a primary side and a secondary side, wherein the inverter is electrically coupled to the primary side of the transformer;
an output rectifier electrically coupled to the secondary side of the transformer;
a fan, disposed in the casing and configured to remove heat from the casing generated by the AC-to-DC converter, the inverter and the output rectifier; and
a fan controller configured to control when the fan is operational, wherein the fan controller is configured to execute a state machine that changes states based at least on a dynamically adjustable counter that is configured to increment and decrement at different rates.