Method for operating a motor vehicle, device for a motor vehicle, motor vehicle

A device for a motor vehicle which comprises an electrical machine (7) having at least three phases, an electrical energy store (13) and a power electronics system (12) having a plurality of switching elements, wherein the phases of the electrical machine (7) are electrically connectable to the energy store (13) by means of the power electronics system (12), and a control apparatus (15) configured to

• determine a driving situation of the motor vehicle (1),
• according to the driving situation thus determined, select an actuation method from a group of at least two potential actuation methods, and
• actuate the plurality of switching elements according to the actuation method selected, wherein actuating the plurality of switching elements of the power electronics system (12) electrically connects phases to the energy store (13) to produce a generator deceleration torque,
• wherein a clocking block method is selected as the actuation method when an emergency braking situation is identified as the driving situation.

A motor vehicle comprising:

• an electrical machine (7) having at least three phases,
• an electrical energy store (13),
• a power electronics system (12) having a plurality of switching elements, wherein the phases of
• the electrical machine (7) are electrically connectable to the energy store (13) by means of the
• power electronics system (12), and a control apparatus configured to
• determine a driving situation of the motor vehicle (1),
• according to the driving situation thus determined, select an actuation method from a group of at least two potential actuation methods, and
• actuate the plurality of switching elements according to the actuation method selected, wherein actuating the plurality of switching elements of the power electronics system (12) electrically connects phases to the energy store (13) to produce a generator deceleration torque,
• wherein, for the determination of the driving situation, an operating force of an actuator (18) is monitored, by means of which the deceleration torque for the motor vehicle is defined.