Remote rotor parameter sensor for electric drives
First Claim
1. A system for monitoring an electric drive motor, the system comprising a first sensor configured to sense a first plurality of operation parameters and a second sensor, whereina rotor of an electric engine or motor is monitored by the first sensor,the first plurality of operation parameters comprises two or more of vibration, temperature, acceleration and movement in an axial direction of the rotor, inductivity, and electric resistance of inductive field generating components of the motor,the rotor of the electric engine or motor is monitored by the second sensor,the second sensor is configured to sense a second plurality of operation parameters comprising two or more of rotation frequency, the vibration, the temperature, the acceleration and the movement in the axial direction of the rotor, the inductivity, and the electric resistance of the inductive field generating components of the motor,the first sensor is attached to a first surface of the rotor at a radial distance from an axis of rotation of the rotor, wherein the first sensor does not intersect the axis of rotation of the rotor, andthe second sensor is attached to a second surface of the rotor, wherein the second sensor intersects the axis of rotation of the rotor.
1 Assignment
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Accused Products
Abstract
A rotor parameter sensor is used for electric drives. A rotor of an electric engine or motor is monitored by a sensor sensing one or more physical observables or operation parameters. Furthermore, a method and system is used for monitoring an electric engine or motor for use in electric or hybrid vehicles.
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Citations
24 Claims
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1. A system for monitoring an electric drive motor, the system comprising a first sensor configured to sense a first plurality of operation parameters and a second sensor, wherein
a rotor of an electric engine or motor is monitored by the first sensor, the first plurality of operation parameters comprises two or more of vibration, temperature, acceleration and movement in an axial direction of the rotor, inductivity, and electric resistance of inductive field generating components of the motor, the rotor of the electric engine or motor is monitored by the second sensor, the second sensor is configured to sense a second plurality of operation parameters comprising two or more of rotation frequency, the vibration, the temperature, the acceleration and the movement in the axial direction of the rotor, the inductivity, and the electric resistance of the inductive field generating components of the motor, the first sensor is attached to a first surface of the rotor at a radial distance from an axis of rotation of the rotor, wherein the first sensor does not intersect the axis of rotation of the rotor, and the second sensor is attached to a second surface of the rotor, wherein the second sensor intersects the axis of rotation of the rotor.
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6. A method for monitoring an electric engine or motor, the method comprising monitoring a rotor of the electric engine or motor by a first sensor and a second sensor sensing a plurality of operation parameters, wherein
the plurality of operation parameters comprises two or more of vibration, temperature, acceleration and movement in an axial direction of the rotor, inductivity, and electric resistance of inductive field generating components of the motor, and monitoring the rotor of the electric engine or motor comprises using the first sensor attached to a first surface of the rotor at a radial distance from an axis of rotation of the rotor to monitor a first operation parameter, wherein the first sensor does not intersect the axis of rotation of the rotor, and using the second sensor attached to a second surface of the rotor to monitor a second operation parameter, wherein the second sensor intersects the axis of rotation of the rotor.
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17. A diagnostic system for monitoring an electric engine or motor for use in an electric or hybrid vehicle, the diagnostic system comprising:
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a circuit for measuring a plurality of operation parameters at a rotor of the electric engine or motor; and a diagnostic circuit configured to; receive a result of measuring the plurality of operation parameters, compare the result of measuring the plurality of operation parameters to a threshold, and determine a diagnostic status indicating operation conditions of the electric engine or motor based on comparing the result of measuring the plurality of operation parameters to the threshold, the operation conditions comprising error or failure information, wherein the circuit for measuring comprises a first radio frequency sensor configured to wirelessly transmit measurements signals, the first radio frequency sensor being arranged at the rotor for sensing the plurality of operation parameters, wherein the plurality of operation parameters comprises temperature of the rotor, acceleration, and a direction of the acceleration in the rotor, and wherein the circuit for measuring further comprises a second radio frequency sensor configured to wirelessly transmit measurements signals, the second radio frequency sensor being arranged at the rotor for sensing temperature of the rotor, acceleration, a direction of the acceleration and a magnetic field in the rotor, the second radio frequency sensor is attached to a first surface of the rotor at a radial distance from an axis of rotation of the rotor, wherein the second radio frequency sensor does not intersect the axis of rotation of the rotor, and the first radio frequency sensor is attached to a second surface of the rotor, wherein the first radio frequency sensor intersects the axis of rotation of the rotor. - View Dependent Claims (18, 19, 20, 21)
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22. A diagnostic system for monitoring an electric engine or motor for use in an electric or hybrid vehicle, the diagnostic system comprising:
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a circuit for measuring a plurality of operation parameters at a rotor of the electric engine or motor; and a diagnostic circuit configured to; receive a result of measuring the plurality of operation parameters, compare the result of measuring the plurality of operation parameters to a threshold, and determine a diagnostic status indicating operation conditions of the electric engine or motor based on comparing the result of measuring the plurality of operation parameters to the threshold, the operation conditions comprising error or failure information, wherein the circuit for measuring comprises a plurality of wireless sensors arranged at the rotor of the electric engine for sensing the plurality of operation parameters, the plurality of operation parameters comprising temperature, acceleration, electric resistance of inductive field generating components of the motor, and a magnetic field at the rotor, and the plurality of wireless sensors comprises; a first sensor attached to a first surface of the rotor at a radial distance from an axis of rotation of the rotor, wherein the first sensor does not intersect the axis of rotation of the rotor, and a second sensor attached to a second surface of the rotor, wherein the second sensor intersects the axis of rotation of the rotor. - View Dependent Claims (23, 24)
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Specification