Abstract: A system includes a converter for powering a synchronous electric machine to which it is connected by cables, an insulating device and a mechanism for short-circuiting phases of the machine. The system includes primary detectors for detecting an overcurrent in the converter and a securing device able to open the insulating device when receiving a primary detection signal emitted by the primary detector. The system also includes secondary detectors able to detect a short-circuit downstream from the insulating device and to emit a secondary detection signal toward the securing device, the latter actuating the closing of the mechanism for short-circuiting as long as they have already received a primary detection signal having led to the opening of the insulating device.

Abstract: A system includes a converter for powering a synchronous electric machine to which it is connected by cables, an insulating device and a mechanism for short-circuiting phases of the machine. The system includes primary detectors for detecting an overcurrent in the converter and a securing device able to open the insulating device when receiving a primary detection signal emitted by the primary detector. The system also includes secondary detectors able to detect a short-circuit downstream from the insulating device and to emit a secondary detection signal toward the securing device, the latter actuating the closing of the mechanism for short-circuiting as long as they have already received a primary detection signal having led to the opening of the insulating device.

Abstract: A feed chain (16) has M feed outputs (31) for supplying a synchronous electric machine (14) with M phases. The feed chain comprises: a converter (22) for converting a direct input current into a polyphase alternating current; a storage bank; a detector (30) for detecting a short-circuit outside or inside the electric machine (14), a device (26) for insulating the electric machine (14) from overvoltages and/or overcurrents of the polyphase alternating current, and a controller (28) for controlling the converter (22) and the insulating device (26). The feed chain (16) includes short-circuiting device (27) capable of connecting the M power supply outputs (31) to each other, the controller (28) being capable of commanding the short-circuiting device (27) to perform that operation.

Abstract: A feed chain (16) has M feed outputs (31) for supplying a synchronous electric machine (14) with M phases. The feed chain comprises: a converter (22) for converting a direct input current into a polyphase alternating current; a storage bank; a detector (30) for detecting a short-circuit outside or inside the electric machine (14), a device (26) for insulating the electric machine (14) from overvoltages and/or overcurrents of the polyphase alternating current, and a controller (28) for controlling the converter (22) and the insulating device (26). The feed chain (16) includes short-circuiting device (27) capable of connecting the M power supply outputs (31) to each other, the controller (28) being capable of commanding the short-circuiting device (27) to perform that operation.

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.

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.