Power Train for a Transport Vehicle, in Particular a Rail Vehicle, and Method for Controlling Same
First Claim
1. A power train for a transport vehicle comprising:
- an electric motor including a shaft, a stator and a rotor, the rotor being rotatable around an axis of the shaft;
a power supply system receiving a direct input voltage and delivering a polyphase voltage to the motor, the power supply system having a modulation factor equal to a voltage amplitude of each phase of the motor divided by the direct input voltage;
a sensor of a signal representative of the rotational speed of the rotor; and
a control device for varying the modulation factor that decreases the modulation factor relative to the modulation factor in the absence of a means for varying the modulation factor, when a 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 means 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.
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Accused Products
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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Citations
17 Claims
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1. A power train for a transport vehicle comprising:
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an electric motor including a shaft, a stator and a rotor, the rotor being rotatable around an axis of the shaft; a power supply system receiving a direct input voltage and delivering a polyphase voltage to the motor, the power supply system having a modulation factor equal to a voltage amplitude of each phase of the motor divided by the direct input voltage; a sensor of a signal representative of the rotational speed of the rotor; and a control device for varying the modulation factor that decreases the modulation factor relative to the modulation factor in the absence of a means for varying the modulation factor, when a 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 means 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 17)
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14. A method for controlling a power train for a transport vehicle comprising an electric motor comprising a shaft, a stator and a rotor, the rotor being rotatable around the axis of the shaft, the method comprising the steps of:
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providing the motor with a polyphase voltage, using a power supply system receiving a direct input voltage and delivering the polyphase voltage, the system having a modulation factor equal to the voltage amplitude of each phase divided by the direct input voltage; measuring the speed of rotation of the rotor; decreasing the modulation factor relative to the modulation factor in the absence of a means 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 increasing the modulation factor relative to the modulation factor in the absence of a means 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. - View Dependent Claims (15)
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Specification