Connection between a winding and a circuit board
Various embodiments may include a connection between a winding for an electric machine and a circuit board for an inverter including a connection between the winding and a circuit board for an inverter. A coil end piece of the stator winding extends in a first direction and is welded or connected in a form-fitting manner directly to the circuit board on which a power output stage of the inverter is located.
1. An electric machine comprising:
an electric motor with a rotor and a stator, the rotor mounted to rotate around a longitudinal axis;
an inverter having a power output stage; and
the stator comprising a stator winding with at least one coil and a coil end piece extending parallel to the longitudinal axis;
a circuit board for the inverter; and
a connection between the coil end piece and the circuit board;
the coil end piece of the stator winding is welded or connected in a form-fitting manner directly to a connecting section of the circuit board on which the power output stage of the inverter is located, the connecting section elastic along the longitudinal axis.
2. The electric machine as claimed in claim 1 , wherein:
the circuit board forms a connecting section to which the end of the conductor is welded or connected;
the connecting section including a lug or a tongue elastic in the first direction.
3. The electric machine as claimed in claim 2 , further comprising a sensor for measuring current, the sensor soldered onto the connecting section.
4. The electric machine as claimed in claim 3 , wherein the sensor comprises a copper strip or a shunt.
5. The electric machine as claimed in claim 4 , wherein the sensor projects beyond the connecting section and is welded to the end of the conductor.
6. The electric machine as claimed in claim 2 , further comprising a second sensor for measuring temperature, the second sensor soldered onto the connecting section.
7. The electric machine as claimed in claim 6 , wherein the further sensor comprises a negative temperature coefficient (an NTC) temperature sensor or a surface mounted device (an SMD) temperature sensor.