Electrical motor power management system
AssigneeGeneral Motors Corporation
InventorsScott D. Downer, James F. Lazar, James M. Nagashima
Life of this patent
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Abstract
A power control system for an electric traction motor in a vehicle comprising at least one inverter for providing conditioned electrical power to the electric traction motor, a plurality of power stages for providing DC power to the at least one inverter, each stage including a battery and boost/buck DC—DC converter, the power stages wired in parallel, and where the power stages are controlled to maintain an output voltage to the at least one inverter.
Claims20
A power control system for an electric traction motor in a vehicle comprising:
- at least one inverter for providing conditioned electrical power to the electric traction motor;
- a plurality of power stages for providing DC power to said at least one inverter, each stage including a battery and boost/buck DC—DC converter, said power stages wired in parallel;
- and
- wherein the power stages are controlled to maintain an output voltage to said at least one inverter.
A vehicle drive system:
- a plurality of power stages, each said power stage including a battery, and a boost/buck DC—DC converter;
- at least one motor inverter electrically coupled to said plurality of power stages for providing conditioned electrical power;
- at least one electrical motor electrically coupled to said at least one motor inverter;
- and
- wherein said plurality of power stages are individually current controlled and wherein said plurality of power stages are jointly controlled to regulate an output voltage.
A method of generating voltage for the operation of an electric motor in a vehicle comprising:
- providing a plurality of power stages connected in parallel, each power stage including a boost/buck DC—DC converter and low voltage battery;
- providing at least one motor inverter for generating conditioned electric power to the electric motor to actuate the electric motor;
- sensing the current provided by each power stage;
- controlling the current individually in each power stage;
- and
- controlling the overall output voltage of the plurality of power stages wired in parallel.
Dependencies are inferred from the claim text.