Abstract:
An ignition coil assembly with extension for electrical connection of an ignition plug of an endothermic engine, wherein the extension (10) comprises an essentially tubular hollow body (11) having a first end area (10.1) engaged, in a detachable manner, on the free end of an ignition plug, and electrical connections (10.26, 20, 10.36), provided for the transmission of high voltage electrical energy between an electrical/electronic member of the ignition coil and the ignition plug. The electrical connections (10.26, 20, 10.36) comprise at least one filter (20) of the high frequency electromagnetic disturbances produced by the operation of the coil, wherein a winding of electrically conductive wire surrounds a central core (20.3) in ferromagnetic material dispersed in a polymer base.
Abstract:
An electric motor includes a stator, a rotor, a plurality of magnets, and a plurality of windings. The stator is provided with a casing extending along a main axis between two end faces inside of which the rotor is inserted. The rotor is rotatable around the main axis and has a plurality of first slots inside of which the permanent magnets are inserted and a plurality of second slots that are radially internal in relation to the first slots and to which the windings are coupled. In addition, the first slots are grouped in a plurality of first groups wherein each first slot defines a corresponding section of a segmented profile.
Abstract:
An electric or hybrid electric-endothermic traction system comprises an electric machine, an inverter, a battery, and a switching device configured to switch between a low-speed configuration, in which the stator windings assume a first electric configuration, and a high-speed configuration, in which the stator windings assume a second electric configuration, wherein the first electric configuration results in a voltage induced by the rotation of the rotor that, on reaching a pre-determined threshold value of the angular velocity of the rotor, exceeds a supply voltage of the battery, whereas the second electric configuration of the stator windings results in a voltage induced by the rotation of the rotor that is lower than the voltage of the battery for any angular velocity within a range of use of the machine. An emergency device is connected to the switching device, control unit and/or inverter.
Abstract:
Method for reconfiguring an electric machine including a rotor arranged to rotate with an angular speed (ω), the electric machine being arranged to pass from a first configuration (config1) to a second configuration (config2), the method comprising the steps of: a) determining in real-time a real speed threshold (ωreal_th) depending on the current operating condition of the electric machine; b) checking if the angular speed (ω) of the rotor is greater than said real speed threshold (ωreal_th); c) in positive case, no reconfiguration is performed from the first configuration (config1); d) in negative case: d.1) determining the current configuration of the electric machine; d.2) selecting a reconfiguring decision method; d.3) deciding whether to reconfigure the electric machine or not and, in positive case, reconfiguring the electric machine.
Abstract:
It is disclosed a winding stator with bar conductors for an electric machine. The stator comprises a stator core and a stator winding. The stator core comprises a plurality of slots extending along the axial direction of the stator core. The stator winding comprises a plurality of bar conductors connected together in series to form the stator winding. Each slot comprises a plurality of first and/or second legs of different bar conductors arranged side-by-side along a radial direction of the stator core defined by the secondary extension of the stator core. The plurality of bar conductors is arranged at the insertion side in groups comprising at least two bar conductors having the respective first legs arranged side-by-side along the radial direction of a slot and having the respective second legs arranged side-by-side along the radial direction of another slot.
Abstract:
A switching device for an electric motor including at least one fixed portion equipped with a number of connecting elements that can be joined to the terminals of each phase, at least one first moveable portion that can be moved with respect to the fixed portion between at least one first position in which the phases are in a first electrical configuration and at least one second position, in which it is disconnected from the phases, at least one second moveable portion that can be moved with respect to the fixed portion between at least one first position in which the phases are in a second electrical configuration, separate from the first, and at least one second position, wherein it is disconnected from the phases, and a movement unit linked to the first and to the second moveable portions and which can be selectively switched, depending on the operating conditions of said electric motor, between at least a first configuration, in which the first moveable portion is placed in the first position and the second moveable portion is in the second position, and a second configuration, in which the first moveable portion is placed in the second position and the second moveable portion is in the first position.
Abstract:
A bidirectional DC-to-DC converter includes first terminals connected to a direct current source, second terminals connected to a load that can be supplied with direct current, a transformer stage including a primary and a secondary circuit that can be magnetically coupled to each other, a switching stage operatively interposed between the two first terminals and the primary circuit and a rectifier stage operatively interposed between the two second terminals and the secondary circuit. A control unit is configured to drive the switching stage and the rectifier stage. The control unit is configured to switch a first switch of the primary circuit and a second switch of the secondary circuit between an open and a closed condition as a function of the level of power transferred by the transformer stage and/or the direction of the energy flow, to change the topology of the primary circuit and/or the secondary circuit.
Abstract:
A power factor correction device includes a power supply side which can be connected to an alternating current source, an output side which can be connected to a direct current load, at least a first power inductor electrically connected in series to a first terminal of the power supply side, and a rectifier operatively interposed between the power supply side and the output side. The rectifier includes a diode bridge configured to convert the alternating current from the source into a direct current towards the load, and one or more switches which can be selectively switched between an open configuration and a closed configuration in order to switch the rectifier between a first configuration, in which it interrupts the current flow towards the output side and charges the first inductor, and a second configuration, in which it allows the transfer of current to the load and discharges the first inductor. A second power inductor is electrically connected in series to a second terminal of the power supply side.
Abstract:
A method for measuring an earth resistance in a battery charging system, including the steps of injecting a measuring signal in alternating current between a first, neutral node and a second, earth node, detecting a voltage signal representing an electrical potential difference between the first and the second node, processing the voltage signal so as to extract a first signal having a frequency equal to that of the measuring signal and a phase correlated thereto, and calculating an earth resistance value as a function of a ratio between the measuring signal and a reference value of said first signal.
Abstract:
A semiconductor device including at least one substrate, a plurality of connection pairs, each equipped with a first connection electrode and a second connection electrode and connected to the terminals of a phase or to the ends of a phase fraction one or more first control electrodes operatively placed between the connection pairs and configured to arrange the pairs in a first electrical configuration and one or more second control electrodes operatively placed between the connection pairs and configured to arrange them in a second electrical configuration.