Sensor device and method for determining an alternating voltage
AssigneeSiemens Mobility GmbH
InventorsMICHAEL SCHULZE, OLAF VOGT
Life of this patent
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Abstract
A sensor device determines an alternating voltage between a conductor and a reference potential, particularly of a switch point drive. In order to reduce the installation cost and effort required to verify the absence of reaction, the sensor device has a sensor element, which is configured for capacitive coupling to the conductor, and a resistance element, which is provided for connection to the reference potential and is connected in series together with the sensor element. The sensor device further has a processing device, which is configured to determine a voltage drop via the resistance element.
Claims17
1-14. (canceled)
A sensor device for determining an alternating voltage between a conductor and a reference potential, the sensor device comprising:
- a sensor element embodied for capacitively coupling to the conductor;
- a resistor for connecting to the reference potential and being interconnected in series with said sensor element;
- and
- a processor for ascertaining a voltage drop across said resistor.
A switch diagnostics device, comprising:
- a first sensor device for determining a current in at least one phase conductor of a switch drive;
- a second sensor device for determining an alternating voltage between the at least one phase conductor and a neutral conductor of the switch drive, said second sensor device including:
- a sensor element embodied for capacitively coupling to the at least one phase conductor;
- a resistor for connecting to the neutral conductor and being interconnected in series with said sensor element;
- and
- a processor for ascertaining a voltage drop across said resistor;
- and
- an evaluation device for determining a representative active power of the switch drive from the current and the alternating voltage determined.
A switch drive, comprising:
- at least one phase conductor for supplying current;
- at least one neutral conductor;
- and
- at least one sensor device for determining an alternating voltage between said at least one phase conductor and said at least one neutral conductor, said at least one sensor device including:
- a sensor element embodied for capacitively coupling to said at least one conductor;
- a resistor for connecting to said at least one neutral conductor and being interconnected in series with said sensor element;
- and
- a processor for ascertaining a voltage drop across said resistor.
A method for determining an alternating voltage between a conductor and a reference potential, which comprises the steps of:
- capacitively coupling a sensor element to the conductor;
- interconnecting a resistor of the sensor element in series with the reference potential;
- and
- ascertaining a voltage drop across the resistor in the sensor element.
A method for switch diagnostics, which comprises the steps of:
- determining an alternating voltage between a phase conductor and a neutral conductor of a switch drive and an alternating current in the phase conductor, the alternating voltage being determined by the substeps of:
- capacitively coupling a sensor element to the phase conductor;
- interconnecting a resistor of the sensor element in series with the neutral conductor;
- and
- ascertaining the alternating voltage dropping across the resistor in the sensor element;
- determining an active power of the switch drive by means of the alternating voltage and the alternating current;
- and
- diagnosing a status of the switch drive on a basis of the active power.
Dependencies are inferred from the claim text.