Abstract: The present invention relates to a DC/AC converter, comprising switching arms, a voltage and current variation modulation circuit, and an electrical energy harvester module. The energy recovery module is linked to the switching arms and to the modulation circuit.

Abstract: The invention relates to an enclosed rotary electrical machine including a cooling system comprising two internal fans (181, 182) fixedly mounted on shaft (160) at both ends of rotor (150). The rotor and stator (190) are contained in an enclosure sealed by two flanges. The fans allow dual air circulation in flux barriers surrounding the rotor magnets and formed by axial recesses running throughout the rotor, and also air circulation in the space created between the internal fans and the inner faces of the flanges comprising fins (113, 123) which orient the air flows created by the fans to capture the heat thereof. External cooling allows the enclosure and the flanges to be cooled, by air or liquid cooling.

Abstract: The present invention relates to a stator of an electrical machine comprising slots (2) and coils (5, 5?) connected to electric phases. The layout of coils (5, 5?) of an electrical phase includes a parallel combination of branches (4), wherein two coils (5, 5?) are combined in series. Furthermore, loops of two coils (5, 5?) of two branches (4) in parallel are inserted in each slot (2).

Abstract: The present invention relates to a system for the conversion of DC electric power into three-phase electric power comprising three commutation arms (A, B, C), a modulation circuit, an electrical energy recovery module (8) and filtering means (7). The filtering means (7) comprise a capacitor (Cf) and an assembly formed from a filtering coil (Lf) connected in series with a diode (D).

Abstract: An electric machine includes an alternating current electric motor comprising two semi-windings and an inverter comprising at least two inverter branches which are electrically connected each one to a respective semi-winding. The machine also includes a control unit which provides respective control signals to the two inverter branches so that they induce two alternating currents of frequency in the respective semi-windings. The control signals of the two inverter branches have a frequency smaller than the frequency and are also reciprocally out of phase by 180° relative to the frequency. This allows reducing ripples of the overall alternating current resulting from the sum of the two alternating currents provided by the two semi-windings.

Abstract: The present invention is an electrical machine comprising a stator and a rotor (10). The rotor is formed with a rotor body comprising a stack of laminations placed on a rotor shaft. The rotor includes at least one cavity with at least one arm for retaining at least one balancing weight.

Abstract: The present invention relates to an electric machine comprising a rotor and a stator. Stator comprises several radial passages, several magnetic flux generators and a tubular sleeve. According to the invention, the inner surface of tubular sleeve is smooth.

Abstract: The present invention is a power module for a system for converting a direct electrical power into a three-phase electrical power. The power module according to the invention comprises two inputs (E1, E2), an output (S), two switches (1), two diodes (D), and two capacitors (Cs, Cov) and to a conversion system comprising such a power module.

Abstract: The present invention relates to a system for converting a direct electrical power into alternating electrical power. The conversion system comprises an assembly on a printed circuit board (14) of several power modules (7), an electrical energy harvesting module and a coil. The present invention relates also to a method for assembling such a conversion system, and a motor system comprising such a conversion system.

Abstract: The present invention relates to a DC/AC converter, comprising switching arms, a voltage and current variation modulation circuit, and an electrical energy recovery module. The energy recovery module is linked to the switching arms and to the modulation circuit.

Abstract: The present invention is an electrical machine comprising a rotor (10) and a stator (12) having radial passages (28) arranged circumferentially along the stator, magnetic-flux generators (34) housed in the passages, and a stator bearing (24) containing the rotor. According to the invention, the radial passages (28) comprise fluid-circulation galleries (36) facing the magnetic-flux generators (34).

Abstract: The present invention relates to an electric machine comprising a rotor (10) and a stator (12), the said rotor being formed of a rotor body (18) with a stack of laminations (16) and placed on a rotor shaft (14), the said laminations comprising housings (40) to house magnetic-flux generators (20) and polar expansions (42) situated between the external (36) and the internal (38) edge of the said laminations. According to the invention, the polar expansions (42) are connected by a connecting bridge (48) to the internal edge (38) of the said laminations.

Abstract: The present invention relates to an electric machine comprising a stator and a rotor (10), the said rotor being formed of a rotor body (20) with a stack of laminations (14) and placed on a rotor shaft (12). According to the invention, the rotor comprises at least one cavity (38) for receiving at least one balance weight (48) for the dynamic balancing of the said rotor.

Abstract: The present invention is an electronic device (10) comprising a printed circuit board (12) bearing at least one component comprising at least one of a power component (14) and at least one power conductor (18). The printed circuit board comprises an alternating succession of insulating (22) and conductive (24) layers, wells (30, 30?) bearing an internal electrically and thermally conductive coating (32) which passes through the thickness of the board, and a cooling device (34) for the board. The interior of the wells are filled with a thermally conductive material (44) to produce a thermal bridge between the component and the cooling device (34).

Abstract: The present invention relates to an electric machine comprising a rotor (10) and a stator (12) comprising a wall (32) facing the rotor. The including radial slots disposed circumferentially around the stator. The slots (36) comprise a bottom wall (38) separated from the wall of the stator to close the slots.

Abstract: A method for manufacturing a rotor with permanent magnets may include providing a central core with a desired cross-section; providing a plurality of ferromagnetic discs having a hole shaped in a complementary manner to the cross-section of the central core; stacking up the ferromagnetic discs around the central core to form a cylindrical structure with a longitudinal cavity, wherein the longitudinal cavity is formed by the holes of the stacked-up ferromagnetic discs; integrally blocking together the stacked-up ferromagnetic discs; and removing the central core. A rotor may be manufactured by the method. The rotor may be used in an electric motor.

Abstract: A method of manufacturing an electric-motor rotor may include providing a magnet of sintered magnetic material, the magnet having a first diameter; providing a sheath of composite material, the sheath having an inner diameter smaller than the first diameter; reducing the first diameter to a second diameter; fitting the sheath onto the magnet when the magnet has the second diameter; and letting the magnet with the sheath fitted thereon to interfere, allowing the sheath to exert inward pressure on the magnet. An electric-motor rotor may include a magnet of sintered magnetic material, the magnet having a first diameter; and a sheath of composite material, the sheath having an inner diameter smaller than the first diameter. The sheath may be associated with the magnet in such a way that the magnet with the sheath fitted thereon interfere so that the sheath exerts inward pressure on the magnet.

Abstract: An electric machine is described, said machine comprising: an alternating current electric motor comprising two semi-windings and an inverter comprising at least two inverter branches which are electrically connected each one to a respective semi-winding. The machine also comprises a control unit which provides respective control signals to the two inverter branches so that they induce two alternating currents of frequency fR in the respective semi-windings. The control signals of the two inverter branches have a frequency fP smaller than the frequency fR and are also reciprocally out of phase by 180° relative to the frequency fP. This allows reducing ripples of the overall alternating current resulting from the sum of the two alternating currents provided by the two semi-windings, thereby approximating a sinusoidal waveform in a more accurate way and thereby reducing the power dissipated by the motor.

Abstract: An electronic device may include at least one power component and a printed circuit board. The at least one power component may include a main body and a lead. The printed circuit board may include at least two conductive layers parallel to a plane. The printed circuit board may further include a mounting element and a conductor. The mounting element may include first conductive tubes. The conductor may include second conductive tubes. The first conductive tubes and the second conductive tubes may elongate through a thickness of the printed circuit board along a direction substantially perpendicular to the plane. The main body of the at least one power component may be fixed to the mounting element. The lead of the at least one power component may be fixed to the conductor.

Abstract: An electronic device may include at least one power component and a printed circuit board. The at least one power component may include a main body and a lead. The printed circuit board may include at least two conductive layers parallel to a plane. The printed circuit board may further include a mounting element and a conductor. The mounting element may include first conductive tubes. The conductor may include second conductive tubes. The first conductive tubes and the second conductive tubes may elongate through a thickness of the printed circuit board along a direction substantially perpendicular to the plane. The main body of the at least one power component may be fixed to the mounting element. The lead of the at least one power component may be fixed to the conductor.