US 12,283,911 B2
Auto-braking for an electromagnetic machine
Anthony Da Costa, Mountain View, CA (US); Matthew Roelle, Belmont, CA (US); John Powers, Menlo Park, CA (US); Patrick Gorzelic, San Francisco, CA (US); and Christopher David Gadda, Palo Alto, CA (US)
Assigned to Mainspring Energy, Inc., Menlo Park, CA (US)
Filed by Mainspring Energy, Inc., Menlo Park, CA (US)
Filed on Apr. 10, 2023, as Appl. No. 18/132,594.
Application 18/132,594 is a continuation of application No. 17/527,961, filed on Nov. 16, 2021, granted, now 11,652,432.
Application 17/527,961 is a continuation of application No. 16/913,090, filed on Jun. 26, 2020, granted, now 11,211,885, issued on Dec. 28, 2021.
Application 16/913,090 is a continuation of application No. 16/137,506, filed on Sep. 20, 2018, granted, now 10,715,068, issued on Jul. 14, 2020.
Claims priority of provisional application 62/561,167, filed on Sep. 20, 2017.
Claims priority of provisional application 62/561,163, filed on Sep. 20, 2017.
Claims priority of provisional application 62/561,166, filed on Sep. 20, 2017.
Prior Publication US 2023/0246576 A1, Aug. 3, 2023
Int. Cl. H02P 9/08 (2006.01); F02B 71/04 (2006.01); H02H 7/08 (2006.01); H02K 7/18 (2006.01); H02P 3/18 (2006.01); H02P 6/00 (2016.01); H02P 9/00 (2006.01); H02P 25/06 (2016.01); H02P 101/25 (2016.01)
CPC H02P 9/08 (2013.01) [F02B 71/04 (2013.01); H02H 7/08 (2013.01); H02P 3/18 (2013.01); H02P 6/005 (2013.01); H02P 6/006 (2013.01); H02P 9/006 (2013.01); H02P 25/06 (2013.01); H02K 7/1884 (2013.01); H02P 2101/25 (2015.01)] 16 Claims
OG exemplary drawing
 
1. A method for braking a translator of a linear multiphase electromagnetic machine, the method comprising:
detecting, using circuitry, a fault event;
determining a polarity indicative of an electromotive force (emf) in at least one phase of the linear multiphase electromagnetic machine caused by a motion of the translator, wherein determining the polarity comprises:
determining phase current information for the respective phase, and
determining the polarity based on the phase current information; and
in response to detecting the fault event, causing, based on the polarity, a current to be applied to a respective phase of the at least one phase to cause a force acting on the translator that opposes an axial motion of the translator to cause the translator to brake.