US 12,009,763 B2
Mode switching for a centrifugal compressor
Benjamin J. Sykora, Stoddard, WI (US); Petri J. Mäki-Ontto, Espoo (FI); James W. Ziemer, Cashton, WI (US); and Matthew A. Shepeck, La Crosse, WI (US)
Assigned to TRANE INTERNATIONAL INC., Davidson, NC (US)
Appl. No. 18/556,753
Filed by TRANE INTERNATIONAL INC., Davidson, NC (US)
PCT Filed Apr. 22, 2022, PCT No. PCT/IB2022/053793
§ 371(c)(1), (2) Date Oct. 23, 2023,
PCT Pub. No. WO2022/224222, PCT Pub. Date Oct. 27, 2022.
Application 18/556,753 is a continuation of application No. 17/238,300, filed on Apr. 23, 2021, granted, now 11,770,087, issued on Sep. 26, 2023.
Prior Publication US 2024/0088810 A1, Mar. 14, 2024
Int. Cl. H02P 27/06 (2006.01); F24F 11/86 (2018.01); H02P 13/06 (2006.01); H02P 25/18 (2006.01)
CPC H02P 25/184 (2013.01) [F24F 11/86 (2018.01); H02P 2207/055 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A permanent magnet motor for a heating, ventilation, air conditioning, and refrigeration (HVACR) system, comprising:
a rotor;
a stator having voltage taps to variably connect the rotor to either of a low-range voltage path and a high-range voltage path; and
a variable frequency drive (VFD) variably connected to the rotor via either the low-range voltage path or the high-range voltage path,
wherein the voltage taps connect the stator to the VFD via the low-range voltage path to implement the HVACR system as a heating system.