US 12,237,106 B2
Magnetic sensing system for a rotary control device
Alexander Wade Gage, Villanova, PA (US); Stephen M. Ludwig, Jr., Coopersburg, PA (US); Robert C. Newman, Jr., Emmaus, PA (US); and William Taylor Shivell, Breinigsville, PA (US)
Assigned to Lutron Technology Company LLC, Coopersburg, PA (US)
Filed by Lutron Technology Company LLC, Coopersburg, PA (US)
Filed on Dec. 6, 2023, as Appl. No. 18/531,069.
Application 18/531,069 is a continuation of application No. 18/086,866, filed on Dec. 22, 2022, granted, now 11,869,710.
Application 18/086,866 is a continuation of application No. 17/691,185, filed on Mar. 10, 2022, granted, now 11,574,754, issued on Feb. 7, 2023.
Application 17/691,185 is a continuation of application No. 16/902,891, filed on Jun. 16, 2020, granted, now 11,309,111, issued on Apr. 19, 2022.
Application 16/902,891 is a continuation of application No. 15/631,459, filed on Jun. 23, 2017, granted, now 10,720,274, issued on Jul. 21, 2020.
Claims priority of provisional application 62/356,989, filed on Jun. 30, 2016.
Prior Publication US 2024/0105371 A1, Mar. 28, 2024
Int. Cl. H01F 7/02 (2006.01); G01R 33/07 (2006.01); H02K 11/215 (2016.01); H03K 17/97 (2006.01); G01D 5/245 (2006.01); G01R 33/00 (2006.01); H03K 17/95 (2006.01)
CPC H01F 7/0205 (2013.01) [G01R 33/07 (2013.01); H01F 7/0273 (2013.01); H02K 11/215 (2016.01); H03K 17/97 (2013.01); G01D 5/2451 (2013.01); G01R 33/0005 (2013.01); H03K 2017/9527 (2013.01); H03K 2017/9713 (2013.01); H03K 2217/94068 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A control device comprising:
a rotating portion;
a circular magnetic element extending around a circumference of the rotating portion, the circular magnetic element comprising alternating positive and negative sections configured to generate a magnetic field in a first direction;
at least one magnetic sensing circuit responsive to magnetic fields in a second direction that is angularly offset from the first direction; and
a first magnetic flux pipe structure adjacent to a first side of the at least one magnetic sensing circuit and a second magnetic flux pipe structure adjacent to a second side of the at least one magnetic sensing circuit, the first magnetic flux pipe structure and the second magnetic flux pipe structure configured to conduct the magnetic field generated by the circular magnetic element and redirect the magnetic field towards the at least one magnetic sensing circuit in the second direction.