Electric Motor Phase Control System
AssigneeThe Boeing Company
InventorsChristopher Pete Benson, Douglas C. Cameron
Life of this patent
Estimating the term…
Abstract
A method and apparatus for controlling an electric motor. A controller is configured to identify a start time for a signal based on a back electromotive force present in an electric motor during operation of the electric motor. The start time is for a position of a rotor relative to a group of coils. The controller is further configured to send the signal to the group of coils using the start time identified. An effect of the back electromotive force on the signal is reduced.
Claims20
An apparatus comprising:
- a controller configured to identify a start time for a signal based on a back electromotive force present in an electric motor during operation of the electric motor, wherein the start time is for a position of a rotor relative to a group of coils;
- and send the signal to the group of coils using the start time identified, wherein an effect of the back electromotive force on the signal is reduced.
An electric motor system comprising:
- an electric motor having a rotor and a group of coils;
- a sensor system configured to generate information about a back electromotive force in the electric motor during operation of the electric motor;
- and
- a controller configured to receive the information from the sensor system;
- identify a start time for a current based on the back electromotive force present in the electric motor during operation of the electric motor using the information from the sensor system, wherein the start time is for a position of the rotor relative to the group of coils;
- and send the current to the group of coils using the start time identified, wherein an effect of the back electromotive force on a signal is reduced.
A method for controlling an electric motor, the method comprising:
- identifying a start time for a signal based on a back electromotive force present in the electric motor during operation of the electric motor, wherein the start time is for a position of a rotor relative to a group of coils in the electric motor;
- and
- sending the signal to the group of coils using the start time identified, wherein an effect of the back electromotive force on the signal is reduced.
Dependencies are inferred from the claim text.