| US 7,543,665 B2 | ||
| Power system | ||
| Edward Lee Zwilling, Washington, Ill. (US); and Rodwan Tarek Adra, Peoria, Ill. (US) | ||
| Assigned to Caterpillar Inc., Peoria, Ill. (US) | ||
| Filed on Mar. 31, 2006, as Appl. No. 11/393,949. | ||
| Prior Publication US 2007/0235236 A1, Oct. 11, 2007 | ||
| Int. Cl. B60W 20/00 (2006.01); B60W 10/08 (2006.01) | ||
| U.S. Cl. 180—65.285 [180/65.25] | 10 Claims |
| 1. A power system of a mobile machine, including:
a power source;
a first electric machine drivingly connected to the power source;
a second electric machine drivingly connected to the power source;
a third electric machine;
one or more propulsion devices drivingly connected to the third electric machine; and
power-system controls, including
a bidirectional power regulator operable to cause the first electric machine to operate as an electric motor and also operable
to cause and regulate generation of electricity by the first electric machine;
a unidirectional power regulator operable to cause and regulate generation of electricity by the second electric; and
wherein the power-system controls are operable to simultaneously drive the first electric machine and the second electric
machine with the power source to generate electricity with both the first electric machine and the second electric machine
with power from the power source, while operating the third electric machine as an electric motor to drive the one or more
propulsion devices.
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