Abstract: A switched reluctance electrical motor comprises a rotor having a substantially circular cylindrical envelope with a diameter in a range of 50 mm to 300 mm and a length in the range of 20 mm to 250 mm. The rotor comprises a plurality of radially extending rotor teeth. A switched reluctance electrical motor further comprises a stator surrounding the rotor and comprising a plurality of stator poles. The rotor teeth are circumferentially-spaced apart from each other to define slots between adjacent teeth that, expressed in normalised angular and radial coordinates, have a cross-sectional profile transverse to an axis of rotation of the rotor, lying within a well-defined polygonal region.

Abstract: A tunable filter includes at least two tunable resonators, a resonator comprising at least one inductance or transmission line, the inductance or transmission line having a first end connected to the ground M and a second end coupled to another resonator via a coupling impedance, and several switched capacitors, wherein the inductance or transmission line comprises several access points or connection points distributed along the inductance allowing for the connection or non-connection of a switched capacitor whose value is defined as a function of its position on the inductance, the capacitors of low weights are situated close to the end of the inductance linked to the ground M. A use of the filter in radio transceivers is also provided.

Abstract: A wind turbine includes a rotor shaft configured for operation by a rotor; a drive shaft configured to be driven by the rotor shaft; a generator driven by the drive shaft and a torque control mechanism provided between the rotor shaft and the drive shaft. The torque control mechanism includes at least two links extending between the rotor shaft and the drive shaft. The links include a first end and a second end, the first end being pivotably connected to the rotor shaft and the second end being pivotably connected to the drive shaft. The length of each link is variable.

Abstract: A wind turbine includes a rotor shaft configured for operation by a rotor; a drive shaft configured to be driven by the rotor shaft; and a generator driven by the drive shaft. The wind turbine further includes a hydraulic cylinder arrangement acting between the rotor shaft and the drive shaft. The hydraulic cylinder arrangement is configured to allow relative rotation between the rotor shaft and the drive shaft.

Abstract: A method for producing one or more radio-frequency resonant patterns on a printed circuit includes a step of cutting one or more resonant patterns directly into the printed circuit while preserving means for mechanically securing the resonant patterns to said printed circuit. The method may be applied to the production of filters.

Abstract: An amplification system, connected to a modem delivering a signal to be amplified, includes at least one amplification device, at least one first determination device for determination of a first difference and at least one second determination device for determination of a variable gain. Moreover, the system is characterized in that the second determination device is capable of the determination of said variable gain on the basis of said signal to be amplified, said amplified signal and said first difference.

Abstract: An amplification system, connected to a modem delivering a signal to be amplified, includes at least one amplification device, at least one first determination device for determination of a first difference and at least one second determination device for determination of a variable gain. Moreover, the system is characterized in that the second determination device is capable of the determination of said variable gain on the basis of said signal to be amplified, said amplified signal and said first difference.

Abstract: A method for producing one or more radio-frequency resonant patterns on a printed circuit includes a step of cutting one or more resonant patterns directly into the printed circuit whilst preserving means for mechanically securing the resonant patterns to said printed circuit. The method may be applied to the production of filters.

Abstract: A phase-locking device comprises a "fast" loop providing for the correction of the transient disturbances and a "slow" loop providing for correction on a wide range of phase shifts.