Sensor apparatus for measuring direct and alternating currents
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorStefan Goetz
Life of this patent
Estimating the term…
Abstract
A sensor apparatus (1) is provided for measuring direct and alternating currents through a conductor (2). The sensor apparatus (1) has a Rogowski coil (3) and the plane of main extent of the Rogowski coil (3) is arranged substantially orthogonally in relation to the direction of main extent of the conductor (2). The conductor (2) is enclosed by the Rogowski coil (3). The sensor apparatus (1) also has a plurality of magnetic field sensors.
Claims11
A sensor apparatus for measuring direct and alternating currents through a conductor, the sensor apparatus comprising:
- a Rogowski coil, a plane of a main extent of the Rogowski coil being arranged substantially orthogonally to the direction of main extent of the conductor, the conductor being enclosed by the Rogowski coil;
- and a plurality of magnetic field sensors, wherein:
- the sensor apparatus has an evaluation electronics system for evaluating the measurement values of the magnetic field sensors, the evaluation electronics system being an analog evaluation electronics system
- the evaluation electronics system has a preamplifier for each magnetic field sensor, and the evaluation electronics system further has an amplifier, the preamplifiers being configured to preamplify by a respective preamplification factor, the preamplification factors being proportional to distances of the respective magnetic field sensor from its nearest adjacent magnetic field sensors.
A sensor apparatus for measuring direct and alternating currents through a conductor, the sensor apparatus comprising:
- a Rogowski coil, a plane of a main extent of the Rogowski coil being arranged substantially orthogonally to the direction of main extent of the conductor, the conductor being enclosed by the Rogowski coil;
- and a plurality of magnetic field sensors, wherein:
- the sensor apparatus has an evaluation electronics system for evaluating the measurement values of the magnetic field sensors,
- the evaluation electronics system being an analog evaluation electronics system,
- the evaluation electronics system has a preamplifier for joint amplification of all magnetic field sensors, and
- the evaluation electronics system has an amplifier.
A sensor apparatus for measuring direct and alternating currents through a conductor, the sensor apparatus comprising:
- a Rogowski coil, a plane of a main extent of the Rogowski coil being arranged substantially orthogonally to the direction of main extent of the conductor, the conductor being enclosed by the Rogowski coil;
- and a plurality of magnetic field sensors, wherein:
- the sensor apparatus has an evaluation electronics system for evaluating the measurement values of the magnetic field sensors,
- the evaluation electronics system being an analog evaluation electronics system,
- the evaluation electronics system is configured to generate a correction value, and the evaluation electronics system being configured:
- to generate a mean value of the measurement values of the magnetic field sensors,
- to generate difference values of the respective magnetic field sensors, where the difference value is a difference between the measurement value of the respective magnetic field sensor and the mean value, and
- to generate the correction value from the difference values.
Dependencies are inferred from the claim text.