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 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, 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 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, 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.
160 Citations
45 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 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 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, 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)
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24. 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 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 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. - View Dependent Claims (25)
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26. 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 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 an energy storage device connected to the traction bus as a function of the determined power storage parameter; and
providing secondary electric power to the traction bus from the electrical energy stored in the energy storage device as a function of the determined power transfer parameter, wherein the traction drive is responsive to the secondary electric power for propelling the off highway vehicle.
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27. 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;
an energy storage system for capturing the electrical energy generated by the traction motor system in the dynamic braking mode and 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 a power storage parameter and a power transfer parameter whereby the energy management system controls the capture of electrical energy by the energy storage system 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 (28)
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- 29. 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 an energy storage system selectively storing a portion of the dynamic braking electrical power generated by the traction motor system in the dynamic braking mode, said energy storage system selectively supplying secondary electric power derived from the portion of the dynamic braking electrical power stored therein to the traction motor system which is responsive to the secondary electric power, the energy management system comprising an energy management processor determining a power storage parameter and a power transfer parameter, said energy management processor controlling the storage of dynamic braking electrical power by the energy storage system as a function of the power storage parameter, and said energy management processor controlling the supply of secondary electric power from the energy storage system to the traction motor system as a function of the power transfer parameter.
Specification