US 12,244,211 B2
Rotor cooling system and method with dynamic flow rate control
Jared Lee, Livonia, MI (US); Robert Seungmo Lee, Commerce Township, MI (US); Jeffrey R Kelly, Wittaker, MI (US); and Addison T Solak, Macomb Township, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Sep. 9, 2022, as Appl. No. 17/931,012.
Prior Publication US 2024/0083230 A1, Mar. 14, 2024
Int. Cl. H02K 9/19 (2006.01); H02K 1/32 (2006.01); H02K 9/193 (2006.01); B60K 1/00 (2006.01); B60K 11/02 (2006.01)
CPC H02K 9/19 (2013.01) [H02K 1/32 (2013.01); H02K 9/193 (2013.01); B60K 1/00 (2013.01); B60K 2001/006 (2013.01); B60K 11/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a controller coupled with an electric machine having a rotor, the controller configured to:
evaluate parameters related to the electric machine for flow rate requirements of the rotor, where the flow rate requirements relate to cooling of the rotor;
compute a flow rate of a fluid for cooling the rotor, where the flow rate is based on a composite of the flow rate requirements; and
deliver a control valve signal to operate a control valve to supply the flow rate to the rotor based on the parameters,
wherein the rotor includes a shaft with a bore, wherein the control valve is disposed to control the flow rate through the bore,
wherein a guide extends into the bore, the guide configured to center the shaft, wherein the control valve extends into the guide.