US 12,234,845 B1
Power control system for traction and implement pump motors of electric machine
Royce E. Leaders, Oswego, IL (US); and Alex M. Fullenkamp, Fort Madison, IA (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Nov. 21, 2023, as Appl. No. 18/516,414.
Int. Cl. F15B 21/08 (2006.01); E02F 9/22 (2006.01); F15B 11/16 (2006.01); E02F 9/20 (2006.01)
CPC F15B 21/08 (2013.01) [E02F 9/2246 (2013.01); F15B 11/16 (2013.01); B60L 2200/40 (2013.01); E02F 9/207 (2013.01); F15B 2211/20515 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electric powertrain for a machine having a traction device and a work implement, the electric powertrain comprising:
an electric power source;
an implement pump for powering the work implement;
an electric traction motor operably coupled to the electric power source for driving the traction device;
an implement pump electric motor operably coupled to the electric power source and the implement pump; and
an electronic controller that stores a plurality of rimpull torque curves, the electronic controller configured to:
determine if the electric power source is in a power limited condition; and
upon determining that the electric power source is in a power limited condition acting to derate a rimpull torque of the traction device from a first rimpull torque curve of the plurality of rimpull torque curves to a lower second rimpull torque curve of the plurality of rimpull torque curves, wherein the selection of the second rimpull torque curve is based on a power usage by the implement pump electric motor.