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公开(公告)号：US20190312536A1
公开(公告)日：2019-10-10
申请号：US16469660
申请日：2017-12-28
申请人： Nidec Corporation
发明人： Hiroki FUJIWARA , Yoshihisa KANNO
IPC分类号： H02P6/28 , H02P6/14 , H02M7/5387 , H02M1/08 , B62D5/04
摘要： A motor drive device includes an inverter circuit, a first switching circuit to switch a path between a power supply and the inverter circuit to conduction and interruption, a second switching circuit to switch a path between the inverter circuit and the motor, a current detector to detect a current of the inverter circuit, a controller to, in a case in which a current value of the detected current is not within a predetermined range, output a command voltage which commands switching from the conduction to the interruption, a driver to boost the command voltage input from the controller and output the boosted command voltage to each switching circuit, and a delay circuit disposed between the second switching circuit and the driver to set a timing at which the command voltage is input to the second switching circuit to be later than a timing at which the command voltage is input to the first switching circuit.
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公开(公告)号：US20240364156A1
公开(公告)日：2024-10-31
申请号：US18646767
申请日：2024-04-26
申请人： NIDEC CORPORATION
发明人： Ta-Yin LUO , Yu-Wei HSU , Kuan YANG , Pei-Chun SHIH , Sheng-Chan YEN , Guo-Jhih YAN , Cheng-Tsung LIU
IPC分类号： H02K1/276
CPC分类号： H02K1/2773
摘要： One aspect of a rotor of the present disclosure is a rotor that includes a rotor core extending along the axial direction and a plurality of auxiliary magnets disposed in the rotor core. The rotor core includes a slit group including a plurality of first slits aligned in a radial direction, and a second slit disposed radially inside the slit group when viewed from the axial direction. The first slit extends along the circumferential direction in a shape protruding radially inward when viewed from the axial direction. The second slit includes a magnet housing portion extending along the radial direction, and a pair of outer flux barrier portions. The auxiliary magnet is disposed in the magnet housing portion with the circumferential direction as the magnetization direction.
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公开(公告)号：US20240364153A1
公开(公告)日：2024-10-31
申请号：US18641966
申请日：2024-04-22
申请人： Nidec Corporation
发明人： Shintaro SAEKI , Masahiro SHIRAISHI
IPC分类号： H02K1/18 , H02K1/2791 , H02K9/22
CPC分类号： H02K1/187 , H02K1/2791 , H02K9/223 , H02K9/227
摘要： A motor includes a heat dissipation portion located in one axial direction from a coil portion located on a stator core of a magnetic body. The heat dissipation portion is separate from a bracket, and is held by a stator holder of the bracket. The heat dissipation portion includes an annular portion having an annular shape surrounding the stator holder and being located on a radially outer surface of the stator holder. An extension extends radially outward from the annular portion.
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公开(公告)号：US20240356389A1
公开(公告)日：2024-10-24
申请号：US18683511
申请日：2022-07-29
发明人： Masanori WATAHIKI , Kan AKATSU
IPC分类号： H02K1/16
CPC分类号： H02K1/165 , H02K2213/03
摘要： A stator core has tooth portions each including a body and an umbrella portion. The umbrella portion includes a first vertex closest to one side in the circumferential direction in a surface facing the side end and the other side in the radial direction, a second vertex farthest from the side end portion toward the one side in the circumferential direction, a third vertex closest to the other side in the circumferential direction in a surface facing the other side in the radial direction, and a fourth vertex farthest from the side end portion toward the other side in the circumferential direction. Lx is between side end portions facing in the circumferential direction on a virtual straight line passing through the second and fourth vertices, Ly1 is between the side end portion and the second vertex, Ly2 is between the side end portion and the fourth vertex, 0
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公开(公告)号：US12126276B2
公开(公告)日：2024-10-22
申请号：US17767473
申请日：2020-09-30
申请人： Nidec Corporation
发明人： Ming-Tsan Lin , Yi-Shiang Ouyang , Hsin-Chang Yu
IPC分类号： H02M1/00 , H02M3/155 , H02M7/5387 , H02P27/08
CPC分类号： H02M7/53871 , H02M1/007 , H02M3/155 , H02P27/08 , H02M1/0048
摘要： A power converter to supply power to each phase of a three-phase motor includes a booster circuit connected to a DC power supply to boost an input voltage input from the DC power supply in response to a pulse width modulation boosting signal, an inverter connected to the booster circuit and including a three-phase switching circuit including switches, and an output connected to the three-phase switching circuit to supply power to each phase of the three-phase motor, and a controller to output the pulse width modulation boosting signal to the booster circuit and output the pulse width modulation boosting signal to the booster circuit when detecting that the booster circuit is in a boosted state.
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公开(公告)号：US12126239B2
公开(公告)日：2024-10-22
申请号：US17950100
申请日：2022-09-22
申请人： NIDEC CORPORATION
发明人： Daisuke Ogasawara , Yuki Ishikawa , Keisuke Nakata , Jun Murakami , Hiroki Akaishi , Kazuyuki Yamamoto
摘要： In an electric power unit which accommodates at least an electric motor in a housing, polygonal rib regions in which polygonal ribs are respectively formed are provided on at least two surfaces of an outer peripheral surface of the housing, and the polygonal rib regions are connected by a circumferential rib. Here, a first axial rib and a second axial rib extending parallel to an axial direction are formed on the outer peripheral surface of the housing, and the polygonal rib region is provided in a portion sandwiched between the first axial rib and the second axial rib. Further, the circumferential rib is formed over the entire part of the polygonal rib region in a circumferential direction. Note that the polygonal rib is a honeycomb rib.
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公开(公告)号：US12119734B2
公开(公告)日：2024-10-15
申请号：US17764644
申请日：2020-08-21
申请人： Nidec Corporation
发明人： Takaaki Bando , Takuya Matsuyama
CPC分类号： H02K9/225 , H02K5/1732 , H02K5/18 , H02K5/203 , H02K7/083 , H02K9/20 , H02K2205/09
摘要： A motor includes a rotor rotatable about a central axis and a stator including coils. The stator opposes the rotor with a gap interposed therebetween. A housing defines at least a portion of a closed chamber in which a cooling medium is housed. Heat dissipation portions are able to release heat of the cooling medium in the closed chamber to an outside. A pressure adjustment portion is able to adjust a pressure in the closed chamber. At least a portion of the coils and the rotor is housed in the closed chamber.
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公开(公告)号：US20240333100A1
公开(公告)日：2024-10-03
申请号：US18622611
申请日：2024-03-29
申请人： NIDEC CORPORATION
摘要： A drive device includes a motor, a transmission, a housing, and a flow path. The transmission includes first to third shafts, and first to third bearings supporting the first to third shafts, respectively. The housing includes a side wall covering a gear chamber from one side in an axial direction, and having first to third bearing holding portions for holding the first to third bearings, respectively. The flow path includes a supply flow path portion that supplies a fluid to the inside of the second bearing holding portion, a first flow path portion that connects the inside of the second bearing holding portion and the inside of the first bearing holding portion, and a second flow path portion that connects the inside of the second bearing holding portion and the inside of the third bearing holding portion.
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公开(公告)号：US20240328549A1
公开(公告)日：2024-10-03
申请号：US18619766
申请日：2024-03-28
申请人： Nidec Corporation
IPC分类号： F16L33/035 , F16L37/086 , F16L37/35
CPC分类号： F16L33/035 , F16L37/086 , F16L37/35
摘要： A cylinder includes a cylindrical portion, an insertion portion, and a first sealing portion. The cylindrical portion has a central axis, extends in an axial direction along the central axis, and allows liquid to flow. The insertion portion extends along the central axis and is inserted into the inside of the cylindrical portion. The first sealing portion seals a space between the cylindrical portion and the insertion portion. The insertion portion includes a recessed portion and a second sealing portion. The recessed portion is annular. The recessed portion is located along an outer peripheral surface of the insertion portion and accommodates the first sealing portion. A second sealing portion seals a space between a step on a bottom surface of the recessed portion and the first sealing portion.
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公开(公告)号：US12103372B2
公开(公告)日：2024-10-01
申请号：US17694690
申请日：2022-03-15
申请人： NIDEC CORPORATION
发明人： Yuki Ishikawa , Hitoshi Kuroyanagi
CPC分类号： B60K1/00 , H02K9/19 , B60K2001/001 , B60K2001/006
摘要： In a drive device, a housing includes a motor accommodation portion for accommodating a motor and an inverter accommodation portion for accommodating an inverter unit, the motor accommodation portion includes a tubular portion of a tubular shape extending in a first direction, the inverter accommodation portion includes a peripheral wall portion surrounding the inverter accommodation portion when viewed from a second direction and a plate portion extending from the tubular portion along one side in a direction perpendicular to the first direction and intersecting the second direction and continuous with the peripheral wall portion, and at least one of the pump and the oil cooler is fixed to the plate portion.
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