Abstract: The invention relates to a closed rotary electrical machine incorporating a cooling system comprising two internal fans secured on the shaft of the rotor, at the two ends of the rotor. Each fan faces the inner face of a flange comprising fins orient the flow of air created by the internal fans and can capture the heat from operation of the machine. A casing which contains the rotor and the stator of the electrical machine is sealed by two flanges. The cooling system also comprises external cooling for cooling the casing and flanges, comprising air or liquid.

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 invention relates to a rotary electrical machine (100) with an integral magnetic sensor (101) of the angular position of the rotor (150). The sensor includes a rotary part (108) with magnet (102) fixed to the end (160b) of the rotation shaft (160) at the rear of the machine, facing a fixed part (103) including Hall effect sensors and mounted on a fixed support (106) connected to the frame of the machine. The machine includes a bearing (104) centered on the axis (X), separating the rotary and fixed parts of the sensor. This bearing, fixed to the shaft and to the metal support of the fixed part of the sensor, and preferably in contact with the rotary part, constitutes a new mechanical reference close to the sensor. The invention provides accurate and robust position information independently of mechanical and magnetic disturbances to which the shaft may be subjected.

Abstract: The present invention is 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 power modules (7), an electrical energy recovery module (5?) and a coil and the present invention also relates to a method for assembling the conversion system, and a motor system comprising the conversion system.

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 is an electrical machine comprising a stator and a rotor (10), with rotor being formed with a rotor body (20) from a stack of laminations (14) 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 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: 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: 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.

Abstract: An electric machine may include: an alternating current electric motor comprising a first semi-winding and a second semi-winding; an inverter comprising a first inverter branch electrically connected to the first semi-winding and a second inverter branch electrically connected to the second semi-winding; and a control unit configured to provide a first control signal to the first inverter branch, so as to induce a first alternating current in the first semi-winding, and a second control signal to the second inverter branch, so as to induce a second alternating current in the second semi-winding. The first and second alternating currents may have a first frequency. The first and second control signals may have a second frequency that is less than the first frequency. The first and second control signals may be reciprocally out of phase by substantially 180° relative to the second frequency.

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: 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.