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公开(公告)号：EP0749675A1
公开(公告)日：1996-12-27
申请号：EP95910297.0
申请日：1995-02-17
申请人： NIDEC CORPORATION
CPC分类号： F04D29/582 , H01L23/467 , H01L2924/0002 , H01L2924/00
摘要： A low profile fan body (20E) for cooling an electronic component has a fan frame (22E) supporting a fan (28E), which is mounted on a fan base (24E) forming a heat sink or heat transfer body. The fan (28E) has a plurality of fan blades (30E) received within a plenum chamber (51E) defined within the heat sink (24E). Each fan blade (30E) defines a first axial edge (31E), a second axial edge (33E) on a substantially opposite side of the blade (30E) relative to the first axial edge (31E), and a radial edge (35E) extending between the first and second axial edges (31E, 33E). The heat sink (24E) defines a base portion (38E) for engaging an exposed surface of the electronic component, and a plurality of heat fins (45E, 49E) spaced relative to each other along the periphery of the heat sink (24E) and defining the plenum chamber (51E). A pressure differential surface (34E) is disposed between the radial edges (35E) of the fan blades (30E) and the fins (45E) for directing air flow in the axial direction of the fan (28E). The radial edges (35E) of a plurality of the fan blades (30E) are at least partially exposed to the adjacent heat fins (45E, 49E) defining a flow path for cooling air across the radial edges (35E) exposed to the heat fins (45E, 49E). The second axial edges (33E) of the fan blades (30E) are located adjacent to and spaced from the base portion (38E) of the heat sink (24E), defining an additional flow path for cooling air between the second axial edges (33E) and the base portion (38E).
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公开(公告)号：EP0746688A1
公开(公告)日：1996-12-11
申请号：EP93923741.0
申请日：1993-09-29
申请人： NIDEC CORPORATION
发明人： Thomas, Daniel L.
CPC分类号： H01L23/467 , F04D25/0613 , F04D29/526 , F04D29/582 , H01L2924/0002 , H01L2924/00
摘要： A low profile, heat transfer, electronic component cooling fan is disclosed. The heat transfer body (20) includes a pressure differential surface (34) formed around the outer perimeter of the fan blades (30) within a first segment of the axial blade depth region. An interface surface (38) for connection to the electronic component is positioned opposite of the fan frame (25). Some heat transfer devices (45) are disposed between the frame (25) and the interface surface (38), such that the heat transfer devices (45) are positioned within a second segment of the axial blade depth region.
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公开(公告)号：EP4331964A1
公开(公告)日：2024-03-06
申请号：EP22795526.7
申请日：2022-03-31
申请人： Nidec Corporation
发明人： MIZUIKE Kosuke , NAGASAWA Naohiro , OYAMA Seiichi , TAKEDA Kazuya
摘要： A hub arranged at a center of a wheel includes a hub shaft extending along a central axis, a hub body rotatably arranged on the hub shaft, a stator having a coil, a rotor having a rotor shaft extending along the central axis, and a lead wire electrically connected to a conductive wire. The rotor shaft is connected to the hub body. The hub shaft has a through hole penetrating from an end part on the axial other side to the outer peripheral surface. The through hole has a first opening part formed on an outer peripheral surface of the hub shaft. The lead wire is arranged in the through hole. An end part on an axial one side of the first opening part and an end part on an axial other side of the first opening part have different circumferential positions with respect to the central axis.
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公开(公告)号：EP4250539A1
公开(公告)日：2023-09-27
申请号：EP23164134.1
申请日：2023-03-24
申请人： Nidec Corporation
发明人： SUGIYAMA, Koji
摘要： A stator (1) includes a cylindrical stator core (3) having a plurality of slots on an inner peripheral side, a first coil (5) having an annular shape and partially located in two first coil slots (41), and a second coil (6) having an annular shape and partially located in two second coil slots (42). The first coil (5) has two first coil end portions (52). The second coil (6) has two second coil end portions (62). The one second coil slot (42) is located on one side in the circumferential direction with respect to the first coil slot (41) located on one side in the circumferential direction of the two first coil slots (41). The other second coil slot (42) is located on the other side in the circumferential direction with respect to the first coil slot (41) located on the other side in the circumferential direction. The sum of the lengths of the two second coil end portions (62) is 1.3 times or more than 1.3 times the sum of the lengths of the two first coil end portions (52).
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公开(公告)号：EP4054069A1
公开(公告)日：2022-09-07
申请号：EP20883041.4
申请日：2020-09-30
申请人： Nidec Corporation
发明人： LIN, Ming Zan , OUYANG, Yi-Shiang , YU, Hsinchang
IPC分类号： H02M7/48
摘要： An embodiment of the present application provides a power converter and an electric apparatus, the power converter being configured to supply power to each phase of a three-phase motor, and including: a booster circuit unit that is connected to a DC power supply and boosts input voltage input from the DC power supply in response to a pulse width modulation boosting signal; an inverter unit that is connected to the booster circuit unit and includes a three-phase switching circuit including a plurality of switching elements, and further includes an output unit that is connected to the three-phase switching circuit to supply power to each phase of the three-phase motor; and a control unit that outputs the pulse width modulation boosting signal to the booster circuit unit and outputs the pulse width modulation boosting signal to the booster circuit unit when detecting that the booster circuit unit is in a boosted state. When it is detected that the booster circuit unit is in a boosted state, a pulse width modulation switching signal is output to the inverter unit to cause no two-phase switching element in the three-phase switching circuit to be turned on in one pulse width modulation cycle.
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公开(公告)号：EP4020763A1
公开(公告)日：2022-06-29
申请号：EP21217354.6
申请日：2021-12-23
申请人： Nidec Corporation
发明人： SHIH, Pei-Chun , HSU, Yu-Wei , YEN, Sheng-Chan , LUO, Ta-Yin , LIN, Hsin-Nan , YAN, Guo-Jhih , LIU, Cheng-Tsung
摘要： The present application provides a synchronous reluctance motor and an electrical product. The synchronous reluctance motor has a rotor and a stator surrounding the rotor, the rotator has a rotating shaft, and has a plurality of magnetic flux barrier layers arranged radially, the one of the plurality of magnetic flux barrier layers closest to the stator is filled with a conductor, and the one closest to the rotating shaft is a gap.
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公开(公告)号：EP3915751A1
公开(公告)日：2021-12-01
申请号：EP21175936.0
申请日：2021-05-26
申请人： Nidec Corporation
发明人： TAKENAKA, Akira , IWATA, Koichi , TSUJI, Hideki , TANAKA, Yosuke
IPC分类号： B29C39/10 , B29C39/26 , B29C33/30 , B29C45/14 , B29C45/27 , H02K15/02 , H02K15/03 , H02K1/27 , H02K15/12 , B29C45/02
摘要： To provide a rotor manufacturing apparatus for manufacturing a rotor having an accommodation hole for accommodating a magnet, the rotor manufacturing apparatus being capable of easily positioning a rotor main body in supplying a resin into the accommodation hole. A rotor manufacturing apparatus (1) is a rotor manufacturing apparatus for manufacturing a rotor including a rotor main body (21) having a hole (211) located at its center and an accommodation hole (212) accommodating a magnet (22) and the magnet (22) accommodated in the accommodation hole (212) and fixed in the accommodation hole (212) with a resin. The rotor manufacturing apparatus (1) includes: a first mold (3) including a resin receive space portion (31) receiving the resin to be supplied into the accommodation hole (212), a flow path (32) through which the molten resin flows into the accommodation hole (212), and a contact portion (33) inserted in the hole (211), the contact portion (33) being in contact with an inner peripheral face of the hole (211); and a second mold (4) configured to sandwich the rotor main body (21) in conjunction with the first mold (3).
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公开(公告)号：EP3886302A1
公开(公告)日：2021-09-29
申请号：EP21153499.5
申请日：2021-01-26
申请人： Nidec Corporation
发明人： YONEYAMA, Takashi
摘要： A method of manufacturing a rotor core, capable of accurately positioning a punched plate member with respect to a die, is provided. A motor (1) includes a columnar rotor core (21) formed of a plurality of disk-shaped rotor core members (25) stacked in the thickness direction, and a rotor magnet (22) inserted in a magnet insertion hole (21c). In the rotor core member (25), a positioning through hole (26) and a rotor magnet through hole (27) have different shapes. A method of manufacturing the motor (1) includes first space portion punching steps (S1, S2), and a through hole punching step (S3). The first space portion punching steps (S1, S2) include punching a plurality of first space portions (26b, 27b) in a band-shaped electromagnetic steel sheet (100). The first space portions (26b, 27b) are portions of a common portion in the positioning through hole (26) and the rotor magnet through hole (27) and have the same shape and do not affect positioning of the rotor magnet (22). The through hole punching step (S3) includes punching at least a portion of the remaining parts of the positioning through hole (26) and the rotor magnet through hole (27) other than the first space portions (26b, 27b).
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公开(公告)号：EP3886300A1
公开(公告)日：2021-09-29
申请号：EP21153507.5
申请日：2021-01-26
申请人： Nidec Corporation
发明人： Honda, Takeshi
摘要： A plate stacked body enabling a plurality of plates, stacked in the thickness direction, to be joined together with an adhesive with sufficient joining strength without impairing the function is provided. A stator core (31) is a plate stacked body formed by stacking a plurality of stator core plates (33) in the thickness direction. The stator core (31) includes a plurality of disk-shaped stator core plates (33) that are stacked in the thickness direction and constitute a columnar stacked body having a filled portion (34) extending in the axial direction, and an adhesive portion (35) in a pillar shape that is configured of an adhesive contained in the filled portion (34) and bonds the plurality of stator core plates (33) together in the axial direction. A part of the inner surfaces of the filled portion (34) is configured of a surface (331b) in the thickness direction of a first stator core plate (331) exposed in the filled portion (34). The adhesive portion (35) has an axial adhesive portion (35a) that adheres in the axial direction to the surface (331b) in the thickness direction of the first stator core plate (331) exposed in the filled portion (34).
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公开(公告)号：EP3745557A1
公开(公告)日：2020-12-02
申请号：EP20176396.8
申请日：2020-05-26
发明人： BERTOLOTTI, Fabio , KATO, Masaki
摘要： A power supply device includes a first resonance unit (2) having a first resonance frequency; a second resonance unit (4) coupled to the first resonance unit (2) through a magnetic field, the second resonance unit (4) having the first resonance frequency; and an insulation unit (3) that provides electrical insulation between the first resonance unit (2) and the second resonance unit (4). The insulation unit (3) has a predetermined insulation distance determined in accordance with a predetermined withstanding voltage and an insulator of the insulation unit (3).
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