Power train for a transport vehicle, in particular a rail vehicle, and method for controlling same
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United States of America Patent
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Aug 27, 2013
Grant Date -
Mar 8, 2012
app pub date -
Aug 2, 2011
filing date -
Aug 2, 2010
priority date (Note) -
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Abstract
A power train for a transport vehicle is provided. The power train includes an electric motor comprising a shaft, a stator and a rotor, a power supply system receiving direct input voltage and delivering a polyphase voltage to the motor. The system has a modulation factor equal to the voltage amplitude of each phase of the motor divided by the direct input voltage, and includes a sensor for the rotational speed of the rotor. The power train includes a control device for varying the modulation factor that is adapted to decrease the modulation factor relative to the modulation factor in the absence of a device for varying the modulation factor, when the speed of rotation of the rotor belongs to a first interval of values below a predetermined transition value, and adapted to increase the modulation factor relative to the modulation factor in the absence of a device for varying the modulation factor, when the speed of rotation of the rotor belongs to a second interval of values greater than the predetermined transition value. A method and transport vehicle are also provided.
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