초록 ▼

A hybrid prolusion system comprising a first energy storage unit operable to supply power to a traction drive motor. A second energy storage unit is coupled with the first energy storage unit to provide additional power on demand to the traction drive motor. An auxiliary power unit (APU) is used to

A hybrid prolusion system comprising a first energy storage unit operable to supply power to a traction drive motor. A second energy storage unit is coupled with the first energy storage unit to provide additional power on demand to the traction drive motor. An auxiliary power unit (APU) is used to charge the first battery to maintain a desired voltage across the first energy storage unit.

대표청구항 ▼

The invention claimed is: 1. A hybrid propulsion system, comprising:a first DC link;a first energy storage unit coupled across the first DC link and operable to supply power to operate at least one traction drive motor;a second DC link coupled electrically downstream of the first DC link;a second en

The invention claimed is: 1. A hybrid propulsion system, comprising:a first DC link;a first energy storage unit coupled across the first DC link and operable to supply power to operate at least one traction drive motor;a second DC link coupled electrically downstream of the first DC link;a second energy storage unit coupled across the second DC link and electrically coupled to the traction drive motor;a conversion circuit coupled between the first and second DC links and configured to cause a different voltage level on the first and second DC links;an auxiliary power unit coupled to the first DC link and operable to charge the first energy storage unit; anda control system operable to control operation of the auxiliary power unit to maintain a desired voltage across the first DC link and to control power flow through conversion circuit;wherein the first energy storage unit and the first DC link are only coupled to the traction motor through the second DC link.