Activation method for an electric machine

A vehicle having an N-phase electric machine, a first on-board electric sub-system, and a second on-board electric sub-system, wherein the electric machine comprises a rotor and a stator system, the first on-board electric sub-system comprises an inverter, the stator system is linked to the inverter and the electric machine can be operated with an inverter controller according to the principle of a field-oriented regulation, wherein

• a control unit is linked to the electric machine,
• the inverter can be controlled by the control unit,
• the control unit controls the inverter in the form of a phase shifted activation method,
• the phase shifted activation method can be utilized for an increased adjustment frequency in pulse pattern generation to reduce a switching frequency of the inverter to improve its efficiency or to expand the operating range of a pulse width-modulated control, which is limited by a rotational speed of the machine at a predefined switching frequency, in a direction of a higher rotational speed of the machine, and
• a neutral point controller supplies a control value for the activation method.

A vehicle having an N-phase electric machine, a first on-board electric sub-system, and a second on-board electric sub-system, wherein the electric machine comprises a rotor and a stator system, the first on-board electric sub-system comprises an inverter, the stator system is linked to the inverter and the electric machine can be operated with an inverter controller according to the principle of a field-oriented regulation, wherein

• a control unit is linked to the electric machine,
• the inverter can be controlled by the control unit,
• the control unit controls the inverter in the form of a phase shifted activation method, and
• with a neutral point switch closed, the electric machine transfers electric power from the first on-board electric sub-system to the second on-board electric sub-system in a neutral point current, with a current direction from the neutral point to the second on-board electric sub-system, and acts as a step-down converter.