US 12,424,952 B2
Position sensing and control in a hybrid system
Jaroslaw Leonarski, Columbus, IN (US); Wei Juin Choy, Columbus, IN (US); Shyam Sunder Padhy, Columbus, IN (US); and Zachary Ryan Gheaja, Columbus, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on Dec. 27, 2022, as Appl. No. 18/089,328.
Claims priority of provisional application 63/294,017, filed on Dec. 27, 2021.
Prior Publication US 2023/0208325 A1, Jun. 29, 2023
Int. Cl. H02P 6/16 (2016.01)
CPC H02P 6/16 (2013.01) 19 Claims
OG exemplary drawing
 
6. A hybrid machine system, comprising:
an internal combustion engine;
an AC electric machine coupled to the internal combustion engine;
an inverter coupling the AC electric machine to a power source or load;
a first feedback system for providing mechanical angular position information representative of mechanical angular positions of the AC electric machine;
a second feedback system providing electrical angular position information representative of electrical angular positions of electrical signals in the AC electric machine; and
a machine control system coupled to the inverter, first feedback system and second feedback system, wherein the machine control system is configured to, while the AC electric machine is driven by the internal combustion engine:
determine mechanical angular positions of the AC electric machine based on the mechanical angular position information;
switch the inverter off and determine electrical angular positions of the AC electric machine based on the electrical angular position information when the AC electric machine is in an unloaded electrical state;
determine and store an offset based on the mechanical angular positions and the electrical angular positions;
generate machine control information based on the mechanical angular positions and the stored offset; and
switch the inverter on and operate the electric machine in a loaded electrical state based on the machine control information.