US 12,217,894 B2
Rotary variable differential transformer
Paresh Sanchihar, Bangalore (IN); Subramanian Esakki, Bangalore (IN); and Vijayshekhar Araganji, Bangalore (IN)
Assigned to Honeywell International Inc., Charlotte, NC (US)
Filed by Honeywell International Inc., Charlotte, NC (US)
Filed on Jun. 13, 2023, as Appl. No. 18/334,162.
Application 18/334,162 is a continuation of application No. 16/422,005, filed on May 24, 2019, granted, now 11,715,587.
Prior Publication US 2023/0326647 A1, Oct. 12, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01F 27/28 (2006.01); G01D 5/22 (2006.01); H01F 21/04 (2006.01); H01F 27/02 (2006.01); H01F 41/02 (2006.01)
CPC H01F 21/04 (2013.01) [G01D 5/2291 (2013.01); H01F 27/02 (2013.01); H01F 27/28 (2013.01); H01F 41/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A rotary variable differential transformer comprising:
a stator;
a primary coil configured to receive an alternating current;
a first secondary coil electromagnetically coupled to the primary coil; and
a second secondary coil electromagnetically coupled to the primary coil;
wherein the rotor is configured with a magnetically permeable arcuate section extending from 180 to 270 degrees of entire circumference of the rotor, such that 90 to 150 degrees of the circumference of the rotor defines a base portion having a smaller radius than the magnetically permeable arcuate section; and wherein the stator further defines an airgap between 0.001 and 0.010 inches measured between the stator and the rotor.