Management of Motor Regeneration
AssigneeThe Boeing Company
InventorsKevin T. Colangelo, Douglas Conrad Cameron
Life of this patent
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Abstract
A method and apparatus for controlling regeneration for a motor. An instantaneous voltage provided by a power supply to the motor is identified using a voltage signal received from a voltage sensor. A new average voltage is computed for the motor using the instantaneous voltage, a previously computed average voltage, and a weight factor for the instantaneous voltage. A difference between the new average voltage and the instantaneous voltage is compared to a selected threshold to determine whether a regeneration condition exists. Operation of the motor is controlled such that a duty cycle of the motor does not decrease in response to a determination that the regeneration condition exists.
Claims19
A method for controlling regeneration for a motor, the method comprising:
- identifying an instantaneous voltage provided by a power supply to the motor using a sample of a voltage signal received from a voltage sensor;
- computing a new average voltage for the motor as an average of voltage provided by the power supply to the motor for a plurality of samples of the voltage signal including the instantaneous voltage;
- comparing a difference between the new average voltage and the instantaneous voltage to a selected threshold;
- and
- controlling operation of the motor such that a duty cycle of the motor does not decrease in response to a determination that the difference between the new average voltage and the instantaneous voltage is greater than the selected threshold.
3-4. (canceled)
An apparatus comprising:
- a voltage sensor that measures a voltage provided by a power supply to a motor to generate a voltage signal;
- and
- a controller that identifies an instantaneous voltage using a sample of the voltage signal received from the voltage sensor;
- computes a new average voltage for the motor as an average of voltage provided by the power supply to the motor for a plurality of samples of the voltage signal including the instantaneous voltage;
- compares a difference between the new average voltage and the instantaneous voltage to a selected threshold;
- and controls operation of the motor such that a duty cycle of the motor does not decrease in response to a determination that the difference between the new average voltage and the instantaneous voltage is greater than the selected threshold.
(canceled)
A method for controlling an electric motor in an aircraft to manage regeneration, the method of comprising:
- receiving a voltage signal from a voltage sensor measuring voltage provided by a power supply to the electric motor;
- identifying an instantaneous voltage from a sample of the voltage signal;
- computing a new average voltage as an average of voltage provided by the power supply to the electric motor for a plurality of samples of the voltage signal including the instantaneous voltage;
- determining that a regeneration condition exists when a difference between the instantaneous voltage and the new average voltage is greater than a selected threshold;
- and
- adjusting a rate limiter for a duty cycle of the electric motor to prevent the duty cycle from decreasing in an undesired manner when it is determined that the regeneration condition exists.
Dependencies are inferred from the claim text.