Electrical system for an electric machine

An electrical system for an electric machine, the electrical system comprising:

• at least three connections for electrical connection to in each case one phase of an at least three-phase AC voltage;
• a first star circuit with three strands via each of which one of the at least three connections is electrically connected to a common star point of the first star circuit and which each have at least one tooth winding;
• a second star circuit with three strands via each of which one of the at least three connections is electrically connected to a common star point of the second star circuit and which each have at least one tooth winding;
• a measuring device that is electrically connected between the first star circuit and the second star circuit, the measuring device being configured for measuring an electrical variable;
• and
• an inverter unit configured for providing the at least three-phase AC voltage, the inverter unit being connected to the at least three connections,
• wherein the inverter unit is configured to modulate a temporally varying signal onto the at least three-phase AC voltage as a carrier signal, and
• wherein the measuring device is connected in each case between two tooth windings of one strand of the three strands of the first star circuit and between two tooth windings of one strand of the three strands of the second star circuit.

A stator for an electric machine, the stator comprising:

• a body having a plurality of stator teeth;
• and
• an electrical system for the electric machine, the electrical system comprising:
• at least three connections for electrical connection to in each case one phase of an at least three-phase AC voltage;
• a first star circuit with three strands via each of which one of the at least three connections is electrically connected to a common star point of the first star circuit and which each have at least two tooth windings that are connected in series;
• a second star circuit with three strands via each of which one of the at least three connections is electrically connected to a common star point of the second star circuit and which each have at least two tooth windings that are connected in series;
• and
• a measuring device that is electrically connected between the first star circuit and the second star circuit, the measuring device being configured for measuring an electrical variable,
• wherein the tooth windings of the first star circuit and the second star circuit are each wound around one stator tooth of the plurality of stator teeth, and
• wherein the measuring device is directly connected between the common star point of the first star circuit and the common star point of the second star circuit.

An electric machine comprising:

• a stator comprising:
• a body having a plurality of stator teeth;
• and
• an electrical system comprising:
• at least three connections for electrical connection to in each case one phase of an at least three-phase AC voltage;
• a first star circuit with three strands via each of which one of the at least three connections is electrically connected to a common star point of the first star circuit and which each have at least two tooth windings that are connected in series;
• a second star circuit with three strands via each of which one of the at least three connections is electrically connected to a common star point of the second star circuit and which each have at least two tooth windings that are connected in series;
• and
• a measuring device that is electrically connected between the first star circuit and the second star circuit, the measuring device being configured for measuring an electrical variable, wherein the tooth windings of the first star circuit and the second star circuit are each wound around one stator tooth of the plurality of stator teeth;
• and
• a rotor that is mounted rotatably relative to the stator,
• wherein the measuring device is connected in each case between two tooth windings of one strand of the three strands of the first star circuit and between two tooth windings of one strand of the three strands of the second star circuit.

An aircraft comprising:

• an electric machine comprising:
• a stator comprising:
• a body having a plurality of stator teeth;
• and
• an electrical system comprising:
• at least three connections for electrical connection to in each case one phase of an at least three-phase AC voltage;
• a first star circuit with three strands via each of which one of the at least three connections is electrically connected to a common star point of the first star circuit and which each have at least two tooth windings that are connected in series;
• a second star circuit with three strands via each of which one of the at least three connections is electrically connected to a common star point of the second star circuit and which each have at least two tooth windings that are connected in series;
• and
• a measuring device that is electrically connected between the first star circuit and the second star circuit, the measuring device being configured for measuring an electrical variable, wherein the tooth windings of the first star circuit and the second star circuit are each wound around one stator tooth of the plurality of stator teeth;
• and
• a rotor that is mounted rotatably relative to the stator,
• wherein the measuring device is directly connected between the common star point of the first star circuit and the common star point of the second star circuit.