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AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsDaniel Engelhardt, Jovan Knezevic, Hajo Meinert, Thomas Prosser
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An electric traction machine, a motor vehicle, and a method for controlling dissipated heat in the electrical power plant of the motor vehicle are described herein. The power plant is supplied with a current, where, in order to provide a predetermined amount of dissipated heat, a ratio between a field-forming and a torque-forming current deviating from an optimum ratio for a respective operating point of the power plant is prescribed. The predetermined dissipated heat is provided by a power plant embodied as a magnet-less three-phase alternator while a rotor current flowing through a rotor of the three-phase alternator is adjusted, the field-forming and the torque-forming currents being prescribed such that acoustic interference signals of the three-phase alternator are minimized by the ratio, and the rotor current is adjusted such that the predetermined dissipated heat is provided by a combination of the rotor current and the ratio minimizing the interference signals.
A method for controlling an amount of dissipated heat in an electric traction machine of a motor vehicle, wherein a current is supplied to the electric traction machine by a control device, a ratio being specified in the current between a field-forming current and a torque-forming current, which deviates from an optimum ratio for a respective operating point of the power plant, in order to provide a predetermined amount of dissipated heat, the method comprising:
An electric drive unit for a motor vehicle having an electric traction machine and a control device which is designed for controlling an amount of dissipated heat of the power plant, a current is provided to the electric traction machine for providing a predetermined amount of dissipated heat, a ratio being specified between a field-forming current and a torque-forming current, which deviates from an optimum ratio for a respective operating point of the power plant wherein
A motor vehicle having at least one electric drive unit for the motor vehicle having an electric traction machine and a control device which is designed for controlling an amount of dissipated heat of the power plant, a current is provided to the electric traction machine for providing a predetermined amount of dissipated heat, a ratio being specified between a field-forming current and a torque-forming current, which deviates from an optimum ratio for a respective operating point of the power plant wherein
Dependencies are inferred from the claim text.