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AssigneeRaytheon Company
InventorsAndrew C. Walecka, Andrew Thompson
Estimating the term…
A system and method uses field-oriented control (FOC) of a multi-phase motor to prevent thermal runaway of the thermal battery that powers the motor. An offset is applied to the flux command signal to ensure that the power level drawn from the thermal battery exceeds a minimum power level to avoid thermal runaway. This is done without any additional hardware, hence the reduced cost, inefficiencies and packaging volume of such hardware. In different modes, the offset is applied to prevent thermal runaway regardless of torque production, when the system is in failure and torque production is zero, for variable and intermittent periods when torque production is zero, and during normal operation to augment power drawn to produce torque.
A controller for a multi-phase motor, comprising:
A method for controlling a multi-phase motor, the multi-phase motor powered by energy from a thermal battery, which upon initiation must draw at least a minimum power level to prevent thermal runaway of the thermal battery, said method comprising:
A method for controlling a multi-phase motor in which the multi-phase motor is powered by energy from a thermal battery, which upon initiation must draw at least a minimum power level to prevent thermal runaway of the thermal battery and in which a field-oriented motor controller generates one or more motor control signals for the multi-phase motor, said one or more motor control signals responsive to a flux command signal and a torque command signal calculated to command a desired torque, said method comprising:
Dependencies are inferred from the claim text.