US 12,272,995 B2
Permanent magnet motor harmonic filter
Benjamin J. Sykora, Stoddard, WI (US); Seth M. McGill, Brookings, SD (US); and Petri J. Mäki-Ontto, Espoo (FI)
Assigned to Trane International Inc., Davidson, NC (US)
Filed by Trane International Inc., Davidson, NC (US)
Filed on Apr. 20, 2020, as Appl. No. 16/853,372.
Prior Publication US 2021/0328481 A1, Oct. 21, 2021
Int. Cl. H02K 11/02 (2016.01); H02K 1/276 (2022.01); H02K 1/278 (2022.01); H02K 9/19 (2006.01); H02K 21/14 (2006.01); H03H 1/00 (2006.01)
CPC H02K 11/02 (2013.01) [H02K 1/2766 (2013.01); H02K 1/278 (2013.01); H02K 9/19 (2013.01); H02K 21/14 (2013.01); H03H 1/0007 (2013.01); H03H 2001/0092 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a housing of a permanent magnet motor, comprising:
a stator;
a rotor;
a permanent magnet coupled to an outer surface of the rotor and situated between the stator and the rotor;
a shaft, extending through an opening in the rotor, that rotates in unison with the rotor;
a core element composed of a ferromagnetic material, wherein the core element is configured to cause a reluctance path to the shaft during operation of the permanent magnet motor; and
a flux barrier situated between the core element and the rotor.