Hybrid energy off highway vehicle electric power management system and method
First Claim
1. An energy management system for use with a hybrid energy off highway vehicle system, said off highway vehicle system including a vehicle having a primary energy source, a power converter driven by the primary energy source providing primary electric power, a traction bus coupled to the power converter and carrying the primary electric power, a secondary energy storage subsystem, a traction drive connected to the traction bus, said traction drive having a motoring mode in which the traction drive is responsive to the primary electric power for propelling the off highway vehicle, said traction drive having a dynamic braking mode of operation wherein said traction drive generates dynamic braking electrical energy, the energy management system comprising:
- an energy management processor determining a power storage parameter and a power transfer parameter, andan energy storage system connected to the traction bus and being responsive to the energy management processor, said energy storage system selectively storing electrical energy available from the traction bus in the secondary energy storage subsystem as a function of the power storage parameter, wherein the energy storage system is responsive to the power storage parameter for determining when to store electrical energy from the traction bus, and selectively supplying secondary electric power from the secondary energy storage subsystem to the traction bus as a function of the power transfer parameter, wherein the secondary energy storage subsystem is responsive to the power transfer parameter for determining when to supply secondary electric power to the traction bus, and wherein the traction drive is responsive to the secondary electric power.
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Accused Products
Abstract
An energy management system for use with a hybrid energy off highway vehicle. The off highway vehicle includes a primary energy source and a power converter driven by the primary energy source for providing primary electric power. A traction bus is coupled to the power converter and carries the primary electric power. A traction drive is connected to the traction bus. The traction drive has a motoring mode in which the traction drive is responsive to the primary electric power for propelling the off highway vehicle. The traction drive has a dynamic braking mode of operation wherein said traction drive generates dynamic braking electrical energy. The energy management system includes an energy management processor for determining a power storage parameter and a power transfer parameter. An energy storage system is connected to the traction bus and is responsive to the energy management processor. The energy storage system selectively stores electrical energy as a function of the power storage parameter and selectively supplying secondary electric power from the stored electrical energy to the traction bus as a function of the power transfer parameter.
138 Citations
50 Claims
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1. An energy management system for use with a hybrid energy off highway vehicle system, said off highway vehicle system including a vehicle having a primary energy source, a power converter driven by the primary energy source providing primary electric power, a traction bus coupled to the power converter and carrying the primary electric power, a secondary energy storage subsystem, a traction drive connected to the traction bus, said traction drive having a motoring mode in which the traction drive is responsive to the primary electric power for propelling the off highway vehicle, said traction drive having a dynamic braking mode of operation wherein said traction drive generates dynamic braking electrical energy, the energy management system comprising:
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an energy management processor determining a power storage parameter and a power transfer parameter, and an energy storage system connected to the traction bus and being responsive to the energy management processor, said energy storage system selectively storing electrical energy available from the traction bus in the secondary energy storage subsystem as a function of the power storage parameter, wherein the energy storage system is responsive to the power storage parameter for determining when to store electrical energy from the traction bus, and selectively supplying secondary electric power from the secondary energy storage subsystem to the traction bus as a function of the power transfer parameter, wherein the secondary energy storage subsystem is responsive to the power transfer parameter for determining when to supply secondary electric power to the traction bus, and wherein the traction drive is responsive to the secondary electric power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An energy management system for use with a hybrid energy off highway vehicle, said off highway vehicle including a primary energy source, a power converter driven by the primary energy source for providing primary electric power, a traction bus coupled to the power converter and carrying the primary electric power, a secondary energy storage subsystem, a traction drive connected to the traction bus, said traction drive having a motoring mode in which the traction drive is responsive to the primary electric power for propelling the off highway vehicle, said traction drive having a dynamic braking mode of operation wherein said traction drive generates dynamic braking electrical energy, the energy management system comprising:
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an energy management processor determining a power storage parameter and a power transfer parameter, and an energy storage system connected to the traction bus and being responsive to the energy management processor, said energy storage system selectively storing electrical energy in the secondary energy storage subsystem as a function of the power storage parameter, wherein the energy storage system is responsive to the power storage parameter for determining when to store electrical energy from the traction bus, and selectively supplying secondary electric power from the-secondary energy storage subsystem to the traction bus as a function of the power transfer parameter, wherein the secondary energy storage subsystem is responsive to the power transfer parameter for determining when to supply secondary electric power to the traction bus, and wherein the traction drive is responsive to the secondary electric power. - View Dependent Claims (26, 27)
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28. An energy management method for use with a hybrid energy off highway vehicle system, said off highway vehicle system including a vehicle having a primary energy source, a power converter driven by the primary energy source providing primary electric power, a traction bus coupled to the power converter and carrying the primary electric power, a secondary energy storage subsystem, a traction drive connected to the traction bus, said traction drive having a motoring mode in which the traction drive is responsive to the primary electric power for propelling the off highway vehicle, said traction drive having a dynamic braking mode of operation wherein said traction drive generates dynamic braking electrical energy, the energy management method comprising:
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determining a power storage parameter; determining a power transfer parameter; storing electrical energy available from the traction bus in the secondary energy storage subsystem connected to the traction bus as a function of the determined power storage parameter, wherein the energy storage system is responsive to the power storage parameter for determining when to store electrical energy from the traction bus; and providing secondary electric power to the traction bus from the electrical energy stored in the secondary energy storage subsystem as a function of the determined power transfer parameter, wherein the secondary energy storage subsystem is responsive to the power transfer parameter for determining when to supply secondary electric power to the traction bus, and wherein the traction drive is responsive to the secondary electric power for propelling the off highway vehicle. - View Dependent Claims (29)
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30. A hybrid energy system for propelling an off highway vehicle, said system comprising:
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a primary energy source; a power converter driven by the primary energy source for providing primary electric power; a traction motor system receiving the primary electric power, said traction motor system propelling the off highway vehicle in response to the received primary electric power, said traction motor system having a dynamic braking mode of operation generating electrical energy; a secondary energy storage subsystem responsive to a power storage parameter for determining when to capture the electrical energy generated by the traction motor system in the dynamic braking mode and for capturing the electrical energy generated by the traction motor system in the dynamic braking mode, and wherein said secondary energy storage subsystem is further responsive to a power transfer parameter for determining when to transfer a portion of the captured electrical energy to the traction motor system and for transferring a portion of the captured electrical energy to the traction motor system to augment the primary electric power; and an energy management system controlling the energy storage system, said energy management system determining the power storage parameter and the power transfer parameter whereby the energy management system controls the capture of electrical energy by the secondary energy storage subsystem as a function of the power storage parameter and controls the transfer of the portion of the captured electrical energy to the traction motor system as a function of the power transfer parameter. - View Dependent Claims (31, 32)
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- 33. An energy management system for use in connection with a hybrid energy off highway vehicle, said hybrid energy off highway vehicle including a primary source, a power converter driven by the primary power source for providing primary electric power, a traction motor system receiving the primary electric power, said traction motor system selectively propelling the off highway vehicle in response to the received primary electric power, said traction motor system having a dynamic braking mode of operation generating dynamic braking electrical power, and a secondary energy storage subsystem responsive to a power storage parameter for determining when to a portion of the dynamic braking electrical power generated by the traction motor system in the dynamic braking mode and selectively storing a portion of the dynamic braking electrical power generated by the traction motor system in the dynamic braking mode as a function of the power storage parameter, said secondary energy storage subsystem responsive to a power transfer parameter for determining when to supply stored electrical energy to the traction motor system and selectively supplying secondary electric power derived from the portion of the dynamic braking electrical power stored therein to the traction motor system, as a function of the power transfer parameter wherein the traction motor system is responsive to the secondary electric power, the energy management system comprising an energy management processor determining the power storage parameter and the power transfer parameter, said energy management processor controlling the storage of dynamic braking electrical power by the secondary energy storage subsystem via the power storage parameter, and said energy management processor controlling the supply of secondary electric power from the secondary energy storage subsystem to the traction motor system via the power transfer parameter.
Specification