Abstract: A motor bogie includes a bogie chassis and a crossbeam. The crossbeam pivots about a vertical axis relative to the bogie chassis, bears on a side friction block and is rotationally coupled by links to a body mounted on the motor bogie. An additional coupling is provided between the chassis and the body by an anti-yaw damper.

Abstract: A device and a method are disclosed for direct current voltage power supply to a traction system by means of converters from different alternating current or direct current voltages available on a power supply line. The power supply device is supplied with power by means of a first power supply element and a second power supply element connected to the power supply line. In this supply device the first power supply element is connected to the primary winding of the power supply transformer by a first connection element. The second power supply element is connected either to the power supply terminal of the traction system or to the mid-point of the series converters by a second connection element.

Abstract: A drawer for electronic cards, the electronic cards being connected to a mother board by card connectors, and the electronic cards being connected to output connectors, wherein the drawer is automatically pluggable and unpluggable and wherein the following are disposed successively from the back to the front of the drawer:The output connectors being disposed inside a drawer support and secured a back face of the drawer support;The electronic cards being disposed between the output connectors in back and the card connectors in front; andthe mother board disposed close to the front face of the drawer.

Abstract: A device with power semiconductor components includes, in combination: a stack alternately comprising at least one power semiconductor component and at least one heatsink to dissipate heat and to provide an electrical connection, at least a first system for clamping the power semiconductor components, at least a second system for clamping components protecting the power semiconductor components, at least one spacer for insulating the semiconductor components from the framework of the various modules and at least one conductive block replacing heatsinks that are rendered unnecessary by the arrangement chosen for the inverter and auxiliary chopper functions.

Abstract: A semi-active damper is controlled by a control circuit which includes a direct main feedback loop, as well as a secondary force feedback loop. The direct main feedback loop includes an inverse model of the damper to be controlled. In the inverse model, an equivalent speed y.sub.e is determined, for use in controlling the damper, based on the measured relative speed y of the ends of the damper. The equivalent speed y.sub.e is used for the purpose of compensating for the fact that a hydraulic fluid used in the damper is not an absolutely incompressible fluid.

Abstract: A multilevel converter comprising, in particular, a capacitor (C1, C2, . . . , Cn) in each of its cells. The capacitors nominally have charge voltages proportional to their respective ranks in the converter. The converter also includes circuits (VMO1, VMO2, . . . , VMOn) for evaluating the mean voltage across the terminals of each of the capacitors (C1, C2, . . . , Cn), circuits (VE1, VE2, . . . , VEn) for measuring any difference that may occur with respect to each of the capacitors (C1, C2, . . . , Cn) between the evaluated mean charge voltage and the nominal mean charge voltage of the capacitor, and for providing a corresponding difference signal (VEC1, VEC2, . . . , VECn), and also correction control circuits (BT, EC1, EC2, . . . , ECn) receiving the difference signals and correspondingly causing at least one temporary coupling to be established between two capacitors in order to correct the difference.

Abstract: A motor-driven cooling ventilator comprises a motor and a ventilator fan disposed on the same axis inside a casing, and has air guide device fixed to the periphery of the stator of said motor and fixed to said casing, said air guide device being means fitted to said stator of the motor.

Abstract: The present invention relates to a rail or road vehicle including a chassis and a roof, said chassis and said roof both being structural elements, each of which forms a single unit only, the two elements defining a right side plane and a left side plane; wherein at least one structural frame is disposed in each of said side planes, and is secured at its bottom to said chassis and at its top to said roof, and wherein said frames are the only self-supporting face structures of said vehicle.

Abstract: An apparatus for avoiding crosstalk problems when locating a vehicle travelling along an electromagnetic wave propagation path. The apparatus is particularly directed to rail transport. The apparatus includes a transmitter for transmitting electromagnetic waves suitable for propagation along the propagation path. A reflector is included for reflecting the electromagnetic waves which propagate along the propagation path. The apparatus also includes a receiver, a comparator, and a processor. The apparatus is configured so that the transmitter does not transmit electromagnetic waves along the propagation path at the same time that the receiver receives the reflected electromagnetic waves. Because the transmitted waves are not transmitted on the propagation path at the same time as the reflected waves are received, the receiver receives only reflected waves at a time when there is no crosstalk interference between the transmitted and reflected waves.

Abstract: A synchronous machine rotor has a progressive magnetic airgap and a constant aerodynamic airgap.

Abstract: In a locking apparatus for locking a point of a rail switch, a control bar and locking bars are disposed side-by-side, touching, and parallel to one another; first and second notches are provided in the same side of the control bar and of each of the locking bars; and the inside of the slideway and the outside of the assembly comprising the control bar and the locking bars are disposed side-by-side and touching, and are of complementary overall shapes so as to enable the control bar and the locking bars to slide relative to the slideway. The present invention also relates to an apparatus for operating and locking a point, to a method of installing this apparatus, and to an apparatus for operating and locking a rail switch.

Abstract: A multilevel converter comprising, in particular, one capacitor (C1, C2, . . . , Cn) and two switches (T1, T'1; for example) in each of its cells. The cells operate successively in a period that repeats at a converter frequency. In parallel with the load (C), a filter circuit (CF) is provided to dissipate the energy of any component having a fundamental frequency that corresponds to said converter period. The filter comprises one or more RLC type series circuits.

Abstract: In a subrack, electronic circuit boards are connected to mother boards disposed in at least two planes parallel to the front face of the subrack. Each plane contains one or more mother boards. The planes are superposed to form a stack of compartments the general exterior envelope of which is generally pyramid shaped.

Abstract: The invention concerns impact-absorber devices, an impact-absorption method, and a framework and a vehicle including such impact-absorber devices. According to the invention, the impact-absorber device comprises at least one longitudinal member absorbing by deformation the energy generated by an impact in a given direction, which member is made from thin plate, having a generally triangular cross-section in a plane perpendicular to the direction of impact. Applications to rail vehicles, for example.

Abstract: An integrated device for securing a wheelchair in a position on a floor is formed of a frame-like box for mounting beneath the floor and within an opening therein. The box mounts for rotation about parallel horizontal axes, a pair of laterally spaced, horizontally extending parallel flaps which are rotatable from a position flush with a pair of openings within a horizontal floor plate receiving the flaps to raised, oppositely oblique positions forming a V. A vertically upright cover extends from one end of the floor plate and mounts a pair of push button controls on an upper surface. A vertically upright actuator is fixedly mounted to a face of the upright cover and has a projectable and re tractable plunger coupled to a flap locking member which carries an axial projection projectable into an axial bore of a retaining cylinder fixedly mounted to the box.

Abstract: In a subrack for electronic circuit boards connected to mother boards the mother boards are disposed in at least two planes parallel to the front face of the subrack. Each plane contains one or more mother boards. The planes are superposed to form a stack in the shape of a pyramid.

Abstract: A multilevel converter including, in particular, a capacitor (C1, C2, . . . , Cn) for each of its cells, and control means comprising means (VMO1, VMO2, . . . , VMOn) for evaluating the mean voltage across the terminals of each of the capacitors (C1, C2, . . . , Cn), means (VE1, VE2, . . . , VEn) for measuring any difference on each of said capacitors (C1, C2, . . . , Cn) between the evaluated mean charge voltage and the nominal mean charge voltage of the capacitor, and additional control means (MCC1, MCC2, . . . , MCCn) changing the duration of said first conduction state of the cell associated with said capacitor in a direction such that the measured difference is reduced.

Abstract: A system for fixing lines, in particular electrical or optical lines, is constituted by a support including octagonal perforations, the octagonal perforations being suitable for co-operating in pairs with clamps for fixing one of the lines in such a manner as to hold the line on the support on a predetermined path; and for receiving separators for separating the lines in such a manner as to prevent any contact between lines.

Abstract: The present invention relates to an automatic driver system for a vehicle, the system comprising:means for evaluating the switching distance D.sub.switch ;means for computing a reference speed V.sub.ref ;means for generating a reference acceleration .gamma..sub.ref ;means for generating a deceleration reference .gamma..sub.brake ; andmeans for generating a traction command T.The present invention also relates to a method of generating a reference acceleration.