System and method for braking in an electric vehicle
AssigneeOshkosh Truck Corporation
InventorsNader Nasr, Christopher K. Yakes
Life of this patent
Estimating the term…
Abstract
An electric traction system for an electric vehicle includes an internal combustion engine and a generator coupled to the engine, a power bus coupled to the generator, a power storage unit coupled to the power bus, a drive controller coupled to an electric motor and to the power bus, and a vehicle controller coupled to the drive controller. The generator is configured to receive electrical power regenerated onto the power bus by the electric motor in order to provide mechanical power to the engine, and the engine is configured to dissipate the mechanical power in order to provide a braking function.
Claims30
An electric traction system for an electric vehicle comprising:
- an internal combustion engine and a generator coupled to the engine;
- a power bus coupled to the generator;
- a power storage unit coupled to the power bus;
- a drive controller coupled to an electric motor and to the power bus;
- and
- a vehicle controller coupled to the drive controller;
- wherein the generator is configured to receive electrical power regenerated onto the power bus by the electric motor in order to provide mechanical power to the engine, and the engine is configured to dissipate the mechanical power in order to provide a braking function.
A method of providing braking in an electric vehicle comprising:
- providing an internal combustion engine and a generator coupled to the engine;
- providing a power bus coupled to the generator;
- providing a power storage unit coupled to the power bus;
- providing a drive controller coupled to an electric motor and to the power bus;
- providing a vehicle controller coupled to the drive controller;
- configuring the generator to receive electrical power regenerated onto the power bus by the electric motor in order to provide mechanical power to the engine;
- and
- configuring the engine to dissipate the mechanical power.
An electric traction vehicle comprising:
- a vehicle platform;
- a principal power unit mounted on the vehicle platform and comprising an engine and an AC generator coupled to the engine;
- an AC electric motor coupled to at least one wheel and supported relative to the vehicle platform;
- a drive controller coupled to the AC electric motor;
- a vehicle controller coupled to the drive controller;
- and
- an AC bus assembly to couple the principal power unit and the drive controller;
- wherein the principal power unit is configured to receive power regenerated onto the AC bus assembly by the AC electric motor and to dissipate the power using the engine in order to provide a braking function.
Dependencies are inferred from the claim text.