Measuring temperature in an electric motor
AssigneeKitty Hawk Corporation
InventorDiederik Marius
Life of this patent
Estimating the term…
Abstract
A system for measuring temperature in an electric motor includes an interface communicatively coupled to a motor and a processor coupled to the interface. In various embodiments, the processor is configured to obtain access to a temperature-measuring electrical path, where the temperature-measuring electrical path rotates relative to a magnetic field, and the temperature-measuring electrical path has no net induced voltage due to magnetic field as the temperature-measuring electrical path rotates relative to the magnetic field. The processor may be further configured to determine a resistance associated with the temperature-measuring electrical path, and determine a temperature of the motor based at least in part on the resistance.
Claims20
A system comprising:
- an interface communicatively coupled to a motor and configured to receive measurements from the motor including voltage measurements, wherein a temperature-measuring electrical path is provided on at least a portion of the motor, a portion of the motor produces a magnetic field that rotates relative to the temperature-measuring electrical path, and path portions of the temperature-measuring electrical path are arranged to cancel out voltages induced due to the rotating magnetic field;
- and
- a processor configured to:
- determine a resistance of the temperature-measuring electrical path based at least in part on the received measurements;
- determine a temperature of the motor based at least in part on the resistance;
- and
- output the determined temperature.
A method of producing a stator comprising:
- forming a stator winding by providing at least one temperature-measuring strand;
- and
- arranging the at least one temperature-measuring strand in a temperature-measuring electrical path, wherein a magnetic field of a motor in which the stator is provided rotates relative to the temperature-measuring electrical path and path portions of the temperature-measuring electrical path are arranged to cancel out voltages induced due to the magnetic field as the rotating magnetic field rotates;
- wherein at least one temperature-measuring strand is used to measure a resistance of the temperature-measuring electrical path to determine a temperature of the stator based at least in part on the resistance.
A method comprising:
- receiving, by a communications interface coupled to a motor, measurements from the motor including voltage measurements wherein a temperature-measuring electrical path is provided on at least a portion of the motor a portion of the motor produces a magnetic field that rotates relative to the temperature-measuring electrical path, and path portions of the temperature-measuring electrical path are arranged to cancel out voltages induced due to the rotating magnetic field rotates;
- determining, by a processor, a resistance of the temperature-measuring electrical path based at least in part on the received measurements;
- determining, by the processor a temperature of the motor based at least in part on the resistance;
- and
- outputting the determined temperature.
A computer program product embodied in a non-transitory computer readable storage medium and comprising computer instructions for:
- receiving measurements from a motor including voltage measurements wherein a temperature-measuring electrical path is provided on at least a portion of the motor, a portion of the motor produces a magnetic field that rotates relative to the temperature-measuring electrical path, and path portions of the temperature-measuring electrical path are arranged to cancel out voltages induced due to the magnetic field as the rotating magnetic field rotates;
- determining a resistance of the temperature-measuring electrical path based at least in part on the received measurements;
- determining a temperature of a motor based at least in part on the resistance;
- and
- outputting the determined temperature.
Dependencies are inferred from the claim text.