Abstract: A paving machine for laying a mat of paving material on a paving surface includes a generator, such as a switched reluctance generator, integrally installed with a pump drive and operatively connected to an output shaft of a power source of the paving machine. The generator outputs AC power to a power converter that in turn outputs DC power for a plurality of screed heating elements to produce heat to warm a screed. The paving machine may also include an insulation monitoring system for determining the occurrences of ground faults in the electrical components by comparing current levels in the components to a predetermined maximum current level. A controller of the paving machine may monitor the temperature of the generator and produce the speed of the power source to prevent overheating.

Abstract: A power system includes a power source, a first electric machine drivingly connected to the power source, a second electric machine drivingly connected to the power source, and power-system controls. The power-system controls may include 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. Additionally, the power-system controls may include a unidirectional power regulator operable to cause and regulate generation of electricity by the second electric machine.