Abstract: An electric machine includes a casing, a cap covering the casing to define an enclosure, a heat sink, a circuit board in the enclosure having a first conductive layer as a top face, a second conductive layer as a bottom face, and vias passing through the circuit board between the top and bottom faces. An electronic component is soldered to the circuit board on the first conductive layer and disposed on top of a first part of the vias. A conductive mass is soldered to the circuit board proximal to the electronic component and disposed on top of a second part of the vias. The conductive mass forms part of the circuit through which a power supply of the electric machine flows and is in electric and heat exchange relationship with the electronic component, while the bottom face is in heat exchange relationship with the heat sink.

Abstract: An electric machine includes a plurality of conductive tracks defining an electric power circuit, to provide current for electronic power components, a printed circuit board which mounts the conductive tracks, an enclosure which defines a housing for the printed circuit board and has a dissipative wall, a heat-conductive filler interposed between the printed circuit board and the enclosure, an elastic device acting on the printed circuit board to press it against the dissipative wall, a conductive element held in position by at least one heat-sensitive joint and disposed to connect a first track and a second track to close the electric power circuit. The elastic device includes an elastic element pressed against the conductive element to apply a force on the heat-sensitive joint and the heat-sensitive joint is configured to break if subjected to a temperature higher than a predetermined threshold temperature to open the electric power circuit.

Abstract: A stator with concentrated windings includes a ferromagnetic core having a central axis, an electrical insulation system disposed on the ferromagnetic core and a winding disposed on the insulation system to be mechanically locked thereto and electrically insulated from the ferromagnetic core; the ferromagnetic core includes a plurality of radial teeth without pole shoe and each tooth has a radial length, an axial depth and a width orthogonal to the radial length and axial depth; the ratio between the slot pitch and the width of the tooth is between 1.2 and 1.5, preferably between 1.3 and 1.4.

Abstract: A rotary electric machine includes an enclosure delimiting an internal space for stator and rotor units. An access hole gives access to the internal space. An internal gasket encircles the access hole adjacent a wall of the enclosure. A closing element is disposed in the internal space, movable towards and away from the wall between a closed configuration compressing the gasket to seal the access hole and an open configuration connecting the internal space with the surrounding atmosphere. An elastic device operates to move the closing element from the open to closed configurations to compress the gasket and seal the access hole. The closing element has a pressure surface facing the access hole and accessible through the access hole via a pin. Pressing the pressure surface causes the closing element to move from the closed configuration to the open configuration.

Abstract: A rotary electric machine includes an electronic module and a heat sink for dissipating heat produced by the module. The module includes a printed circuit, an electronic component having a base positioned on the printed circuit, a heat transfer device connected to the printed circuit and to the electronic component for transferring heat generated by the component to the heat sink. The heat transfer device includes an upper portion extending from the printed circuit towards the heat sink from the same side of the component and a base portion connected to the upper portion and positioned in the printed circuit at least partly under the component to form, at least partly, a preferential path for the heat, from the base of the electronic component to the heat sink. The electronic component is connected at least partly by its own base to the base portion of the heat transfer device.

Abstract: An electric machine includes a conductive element disposed in such a way as to connect a first track and a second track of an electric power circuit to close the circuit; the conductive element being held in position by at least one mechanically breakable joint which, if subjected to a predetermined force, mechanically yields or breaks and thereby opens the electric power circuit; the machine includes a system for releasing the conductive element from the first and/or the second track if the casing of the electric machine is moved near the cap which covers the machine.

Abstract: An electric liquid pump includes a casing having a central portion, rear cover and front cover, having an inlet and an outlet for the liquid. The central portion has first and second compartments, with the second compartment in fluid communication with the front cover interior. The pump includes an impeller and an electric motor, for operating the impeller, a stator housed in the first compartment, a rotor, coaxial with the stator, housed in the second compartment and an electronic card for supplying the stator at least partly housed in the rear cover. The central portion includes a plurality of walls delimiting a plurality of gaps in fluid communication with the second compartment and the front cover interior such that the liquid circulates in the gaps. The walls at least partly face the stator such that the liquid circulating in the corresponding gap removes heat from the stator.

Abstract: An electric machine includes a casing, a cap covering the casing to define an enclosure, a heat sink, a circuit board in the enclosure having a first conductive layer as a top face, a second conductive layer as a bottom face, and vias passing through the circuit board between the top and bottom faces. An electronic component is soldered to the circuit board on the first conductive layer and disposed on top of a first part of the vias. A conductive mass is soldered to the circuit board proximal to the electronic component and disposed on top of a second part of the vias. The conductive mass forms part of the circuit through which a power supply of the electric machine flows and is in electric and heat exchange relationship with the electronic component, while the bottom face is in heat exchange relationship with the heat sink.

Abstract: An electric machine including a casing comprising a base wall, a stator integral with the casing and provided with a plurality of coils constituting a stator winding, a thermally conductive and electrically insulating annular heat sink interposed between the stator and the base wall of the casing; the annular heat sink is abutted against the base wall and the coils are abutted against the annular heat sink which defines a stop for the stator.

Abstract: A rotary electric machine including an electronic module which includes a printed circuit board and a plurality of electronic components, each of which is provided with respective connecting pins disposed on a component side of the printed circuit board; the electronic module includes at least one conductive track which includes a plurality of tabs, each configured to be connected to a respective connecting pin; the conductive track is positioned on the component side of the printed circuit board; the printed circuit board has at least one seat configured to house at least a first tab of the tabs in such a way that the top face of the first tab is coplanar with the component side of the printed circuit board.

Abstract: An electric machine includes a conductive element disposed in such a way as to connect a first track and a second track of an electric power circuit to close the circuit; the conductive element being held in position by at least one mechanically breakable joint which, if subjected to a predetermined force, mechanically yields or breaks and thereby opens the electric power circuit; the machine includes a system for releasing the conductive element from the first and/or the second track if the casing of the electric machine is moved near the cap which covers the machine.

Abstract: A rotary electric machine includes an enclosure delimiting an internal space for stator and rotor units. An access hole gives access to the internal space. An internal gasket encircles the access hole adjacent a wall of the enclosure. A closing element is disposed in the internal space, movable towards and away from the wall between a closed configuration compressing the gasket to seal the access hole and an open configuration connecting the internal space with the surrounding atmosphere. An elastic device operates to move the closing element from the open to closed configurations to compress the gasket and seal the access hole. The closing element has a pressure surface facing the access hole and accessible through the access hole via a pin. Pressing the pressure surface causes the closing element to move from the closed configuration to the open configuration.

Abstract: An electric machine includes a plurality of conductive tracks defining an electric power circuit, to provide current for electronic power components, a printed circuit board which mounts the conductive tracks, an enclosure which defines a housing for the printed circuit board and has a dissipative wall, a heat-conductive filler interposed between the printed circuit board and the enclosure, an elastic device acting on the printed circuit board to press it against the dissipative wall, a conductive element held in position by at least one heat-sensitive joint and disposed to connect a first track and a second track to close the electric power circuit. The elastic device includes an elastic element pressed against the conductive element to apply a force on the heat-sensitive joint and the heat-sensitive joint is configured to break if subjected to a temperature higher than a predetermined threshold temperature to open the electric power circuit.

Abstract: A rotary electric machine includes an electronic module and a heat sink for dissipating heat produced by the module. The module includes a printed circuit, an electronic component having a base positioned on the printed circuit, a heat transfer device connected to the printed circuit and to the electronic component for transferring heat generated by the component to the heat sink. The heat transfer device includes an upper portion extending from the printed circuit towards the heat sink from the same side of the component and a base portion connected to the upper portion and positioned in the printed circuit at least partly under the component to form, at least partly, a preferential path for the heat, from the base of the electronic component to the heat sink. The electronic component is connected at least partly by its own base to the base portion of the heat transfer device.

Abstract: An electric liquid pump includes a casing having a central portion, rear cover and front cover, having an inlet and an outlet for the liquid. The central portion has first and second compartments, with the second compartment in fluid communication with the front cover interior. The pump includes an impeller and an electric motor, for operating the impeller, a stator housed in the first compartment, a rotor, coaxial with the stator, housed in the second compartment and an electronic card for supplying the stator at least partly housed in the rear cover. The central portion includes a plurality of walls delimiting a plurality of gaps in fluid communication with the second compartment and the front cover interior such that the liquid circulates in the gaps. The walls at least partly face the stator such that the liquid circulating in the corresponding gap removes heat from the stator.

Abstract: A process for calculating an angular spacing of an axial fan including a hub and a number z of blades extending from the hub wherein an angular position of the various blades is indicated as ?1, . . . , ?az assuming ?1=0, and an angular difference between the various blades is indicated as ?i=?i+1??i, i=1, . . . , z?1, ?z=360°??z, including a step of setting up a calculating system including a plurality of mathematical problems each an expression of a constraint which the angular spacing must satisfy; the calculating system including a first mathematical problem which requires that the fan is statically balanced, a second mathematical problem which requires that adjacent blades are not superposed and a third mathematical problem which requires that the angular differences ?1, . . . , ?n are all different to each other.

Abstract: An electric machine including a casing comprising a base wall, a stator integral with the casing and provided with a plurality of coils constituting a stator winding, a thermally conductive and electrically insulating annular heat sink interposed between the stator and the base wall of the casing; the annular heat sink is abutted against the base wall and the coils are abutted against the annular heat sink which defines a stop for the stator.

Abstract: A rotary electric machine including an electronic module which includes a printed circuit board and a plurality of electronic components, each of which is provided with respective connecting pins disposed on a component side of the printed circuit board; the electronic module includes at least one conductive track which includes a plurality of tabs, each configured to be connected to a respective connecting pin; the conductive track is positioned on the component side of the printed circuit board; the printed circuit board has at least one seat configured to house at least a first tab of the tabs in such a way that the top face of the first tab is coplanar with the component side of the printed circuit board.