公开(公告)号：US10320321B2

公开(公告)日：2019-06-11

申请号：US15366385

申请日：2016-12-01

Applicant: MAVEL S.r.l.

Inventor： Davide Bettoni

IPC: H02P25/22 ,  H02P6/08 ,  H02P27/08 ,  H02P5/74 ,  H02M7/5387 ,  H02P23/28

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.

公开(公告)号：US11444530B2

公开(公告)日：2022-09-13

申请号：US15777790

申请日：2016-10-26

Applicant: IFP Energies nouvelles ,  MAVEL S.r.l.

Inventor： Wissam Dib ,  Denny Chiono ,  Davide Bettoni

IPC: H02M1/34 ,  H02M7/00 ,  H02M7/5387 ,  H02M7/5395 ,  H02P27/08 ,  H02M1/00

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.

公开(公告)号：US10511221B2

公开(公告)日：2019-12-17

申请号：US15770043

申请日：2016-10-11

Applicant: IFP Energies nouvelles ,  MAVEL S.r.l.

Inventor： Wissam Dib ,  Davide Bettoni ,  Denny Chiono

IPC: H02M1/34 ,  H02M7/5387 ,  H02P27/08 ,  H02M7/48 ,  H02M1/00

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.

公开(公告)号：US11228226B2

公开(公告)日：2022-01-18

申请号：US16614405

申请日：2018-05-02

Applicant: IFP Energies nouvelles ,  MAVEL S.r.l.

Inventor： Luca Favre ,  Davide Bettoni ,  Wissam Dib

IPC: H02K7/00 ,  H02K1/24 ,  H02K1/27 ,  H02K1/28 ,  H02K19/02 ,  H02K21/02

Abstract: The present invention relates to an electrical machine comprising a rotor (10) and a stator, rotor (10) being formed by assembling a rotor body (4) and a rotor shaft (1). According to the invention, rotor shaft (1) is knurled and the outside diameter of rotor shaft (1) is greater than the inside diameter of rotor body (4), by a value ranging between 0.05 mm and 0.3 mm. The present invention further relates to a method of manufacturing such an electrical machine.

公开(公告)号：US10797556B2

公开(公告)日：2020-10-06

申请号：US15761296

申请日：2016-09-07

Applicant: IFP Energies nouvelles ,  MAVEL S.r.l.

Inventor： Luca Favre ,  Davide Bettoni

IPC: H02K5/128 ,  H02K3/24 ,  H02K9/19 ,  H02K21/44 ,  H02K7/08 ,  H02K1/20 ,  H02K9/00

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).

公开(公告)号：US09680357B2

公开(公告)日：2017-06-13

申请号：US14031783

申请日：2013-09-19

Applicant: MAVEL S.r.l.

Inventor： Davide Bettoni ,  Andrea Bertoldo

IPC: H02K15/03 ,  H02K1/27

CPC classification number: H02K15/03 ,  H01F7/0221 ,  H01F41/0253 ,  H02K1/27 ,  H02K1/2733 ,  Y10T29/49012

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.

公开(公告)号：US09641030B2

公开(公告)日：2017-05-02

申请号：US14031681

申请日：2013-09-19

Applicant: MAVEL S.r.l.

Inventor： Davide Bettoni

IPC: H02K15/03 ,  H02K1/27

CPC classification number: H02K1/27 ,  H02K1/2733 ,  H02K15/03 ,  Y10T29/49012

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.

公开(公告)号：US11239727B2

公开(公告)日：2022-02-01

申请号：US16300139

申请日：2017-04-10

Applicant: IFP Energies nouvelles ,  MAVEL S.r.l.

Inventor： Julien Boisson ,  Benjamin Gaussens ,  Luca Favre ,  Davide Bettoni ,  Wissam Dib

IPC: H02K7/04 ,  H02K15/16 ,  H02K1/27 ,  H02K1/24

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.

公开(公告)号：US11005331B2

公开(公告)日：2021-05-11

申请号：US16479503

申请日：2018-01-17

Applicant: IFP Energies nouvelles ,  MAVEL S.r.l.

Inventor： Wissam Dib ,  Luca Favre ,  Davide Bettoni

IPC: H02K9/06 ,  H02K5/18 ,  H02K1/24 ,  H02K5/20 ,  H02K7/08 ,  H02K9/18 ,  H02K9/19

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.

公开(公告)号：US11005330B2

公开(公告)日：2021-05-11

申请号：US16341663

申请日：2017-09-25

Applicant: IFP Energies nouvelles ,  MAVEL S.r.l.

Inventor： Wissam Dib ,  Luca Favre ,  Davide Bettoni

IPC: H02K9/19 ,  H02K5/18 ,  H02K5/20 ,  H02K7/08 ,  H02K9/06 ,  H02K9/18

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.