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US 6,307,346 B1Granted
Induction motor load limiting for power steering applications
AssigneeGeneral Motors Corporation
InventorsScott D. Downer, Stanley K. Fujii, Wade E. Char
Life of this patent
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AssigneeGeneral Motors Corporation
InventorsScott D. Downer, Stanley K. Fujii, Wade E. Char
Estimating the term…
A power steering system and induction motor load compensation algorithm or processing method for use in a vehicle. The power steering system comprises a power supply, a power steering motor, a steering subsystem, and a power steering controller coupled to the power supply. The controller processes a frequency command input corresponding to the power steering frequency requested by the steering subsystem and data contained in one or more software lookup tables to adjust the output frequency produced by the power supply to control the speed of the power steering, motor. The lookup tables are generated empirically and characterize the output power of the power supply at different system pressures over a range of motor speeds. The software lookup tables provide a power band that implements a power limiting state machine.
A power steering system for use in a vehicle comprising:
A method for controlling a power steering system of a vehicle, the power steering system comprising a power supply, a power steering motor, a steering subsystem, and a power steering controller, the algorithm comprising the steps of:
Dependencies are inferred from the claim text.