Inverter and output filter system for providing single-phase and three-phase output voltages

An inverter device for a vehicle, comprising:

• a three-phase inverter with:
• a first supply voltage terminal configured to feed DC voltage from a vehicle battery,
• a second supply voltage terminal configured to connect to the vehicle battery,
• a first supply terminal configured to supply first AC voltage,
• a second supply terminal configured to supply second AC voltage, and
• a third supply terminal configured to supply third AC voltage;
• and
• a filter device with:
• at least one first coupling terminal configured to electrically couple with the first supply terminal,
• a second coupling terminal configured to electrically couple with the second supply terminal,
• at least one filter output configured to supply filtered AC voltage,
• a neutral conductor output,
• a first phase inductance which is connected between the at least one first coupling terminal and the at least one filter output,
• a second phase inductance which is connected between the second coupling terminal and the neutral conductor output, and
• a filter capacitance which is connected between the at least one filter output and the neutral conductor output.

A method for operating an inverter device for a vehicle, having:

• a three-phase inverter with:
• a first supply voltage terminal configured to feed DC voltage from a vehicle battery,
• a second supply voltage terminal configured to connect to the vehicle battery,
• a first supply terminal configured to supply first AC voltage,
• a second supply terminal configured to supply second AC voltage, and
• a third supply terminal configured to supply third AC voltage;
• and
• a filter device with:
• at least one first coupling terminal configured to electrically couple with the first supply terminal,
• a second coupling terminal configured to electrically couple with the second supply terminal,
• at least one filter output configured to supply filtered AC voltage,
• a neutral conductor output,
• a first phase inductance which is connected between the at least one first coupling terminal and the at least one filter output,
• a second phase inductance which is connected between the second coupling terminal and the neutral conductor output, and
• a filter capacitance which is connected between the at least one filter output and the neutral conductor output, the method comprising:
• at least one step for connecting the first supply voltage terminal and the second supply voltage terminal to the vehicle battery and
• providing the filtered AC voltage to at least the at least one filter output.

A vehicle comprising:

• a vehicle battery;
• and
• an inverter device, comprising:
• a three-phase inverter with:
• a first supply voltage terminal configured to feed DC voltage from a vehicle battery,
• a second supply voltage terminal configured to connect to the vehicle battery,
• a first supply terminal configured to supply first AC voltage,
• a second supply terminal configured to supply second AC voltage, and
• a third supply terminal configured to supply third AC voltage;
• and
• a filter device with:
• at least one first coupling terminal configured to electrically couple with the first supply terminal,
• a second coupling terminal configured to electrically couple with the second supply terminal,
• at least one filter output configured to supply filtered AC voltage,
• a neutral conductor output,
• a first phase inductance which is connected between the at least one first coupling terminal and the at least one filter output,
• a second phase inductance which is connected between the second coupling terminal and the neutral conductor output, and
• a filter capacitance which is connected between the at least one filter output and the neutral conductor output.