-
公开(公告)号：US20220166270A1
公开(公告)日：2022-05-26
申请号：US17430818
申请日：2019-02-21
发明人： Masahiro NIGO , Yuji HIROSAWA , Emi TSUKAMOTO
摘要： A rotor core has a magnet insertion hole, an opening formed adjacent to the magnet insertion hole in the circumferential direction, and a thin wall portion formed between the opening and an outer circumference of the rotor core. A stator core has a length in the axial direction shorter than that of the rotor core. The rotor core has a facing region where the rotor core faces the stator core in the radial direction and an overhang region where the rotor core protrudes from the stator core in the axial direction. A distance from the center axis to a portion of the outer circumference located on a radially outer side of the magnet insertion hole is longer in at least part of the overhang region than in the facing region. The minimum width of the thin wall portion in the radial direction is the same in both regions.
-
公开(公告)号：US20210273506A1
公开(公告)日：2021-09-02
申请号：US17255716
申请日：2018-07-27
发明人： Tomoki MASUKO , Masahiro NIGO
摘要： An electric motor includes: a stator including a first stator core, a second stator core, and a slot in which a stator winding is disposed, and a rotor including a first rotor core facing a first stator core in a radial direction and a second stator core facing the second stator core in the radial direction. The first stator core and the second stator core are laminated in an axial direction. The stator includes a depression formed in a position facing the slot and not touching the stator winding. A volume of the first rotor core is smaller than a volume of the second rotor core.
-
公开(公告)号：US20210050757A1
公开(公告)日：2021-02-18
申请号：US16968743
申请日：2019-03-15
发明人： Shuichi KITANO , Masahiro NIGO , Kazuya KUMAGAI , Ryo ISHIDA , Hironori TSUIKI , Moriyuki HAZEYAMA
摘要： Two types of insulating members, i.e., end surface insulators and slot insulators are provided. On tooth portion sides of both side surfaces in the circumferential direction of tooth end surface covering portions of the end surface insulator, first cutouts recessed in the circumferential direction are provided so as to extend in the radial direction. A part axially upward of the first cutouts protrudes in the circumferential direction to form a first overhang portion, and the slot insulator is accommodated between the first overhang portions of two end surface insulators.
-
4.发明申请公开(公告)号：US20200177114A1
公开(公告)日：2020-06-04
申请号：US16612462
申请日：2017-07-28
发明人： Yuji HIROSAWA , Masahiro NIGO
摘要： A driving device includes a connection switching unit that switches connection condition of a coil between Y connection and delta connection, an inverter, and a control device that controls a carrier frequency of the inverter. The carrier frequency is set at a first carrier frequency when the connection condition of the coil is the Y connection. The carrier frequency is set at a second carrier frequency when the connection condition of the coil is the delta connection.
-
公开(公告)号：US20190245471A1
公开(公告)日：2019-08-08
申请号：US16329572
申请日：2016-10-31
发明人： Masahiro NIGO
摘要： An air conditioner includes a signal receiving unit to receive an operation instruction signal, a compressor including a motor including coils, an inverter connected to the coils, a connection switching unit to switch a connection state of the coils between a first connection state and a second connection state, and a controller to control the inverter and the connection switching unit. When the signal receiving unit receives an operation stop signal, the connection switching unit switches the connection state of the coils from the first connection state to the second connection state.
-
公开(公告)号：US20180248428A1
公开(公告)日：2018-08-30
申请号：US15758024
申请日：2015-11-02
发明人： Masahiro NIGO , Yuji HIROSAWA , Ryukichi KIJIMA
CPC分类号： H02K1/2766 , F04C18/30 , F04C29/0085 , F04C2240/40 , F25B1/04 , F25B31/026 , H01F1/057 , H02K1/02 , H02K1/27 , H02K2201/09
摘要： A motor includes a stator and a rotor provided inside the stator. The rotor includes a rotor core having a magnet insertion hole and two permanent magnets disposed in the magnet insertion hole. The rotor core has a first magnet holding portion disposed between the two permanent magnets and holding the two permanent magnets, an opening disposed on an inner side of the first magnet holding portion in a radial direction of the rotor core, and a center hole disposed at a center of the rotor core in the radial direction. A distance from the opening to the magnet insertion hole is shorter than a distance from the opening to the center hole.
-
7.发明申请ELECTRIC MOTOR WITH EMBEDDED PERMANENT MAGNET, COMPRESSOR, AND REFRIGERATION/AIR-CONDITIONING DEVICE 有权嵌入式永久磁铁，压缩机和制冷/空调装置的电动马达公开(公告)号：US20160172913A1
公开(公告)日：2016-06-16
申请号：US14909497
申请日：2013-09-25
CPC分类号： H02K1/276 , F04C18/00 , F04C29/0085 , F04C2240/40 , F25B31/026 , H02K1/2766
摘要： In an interior permanent magnet motor, at least one magnetic pole center slit and a plurality of side slits are formed between a rotor outer peripheral surface of a rotor and a radially-outer insertion hole contour surface of a magnet insertion hole. The plurality of side slits are formed so that at least one side slit is formed on each of both sides of the magnetic pole center slit in a width direction. The area of the magnetic pole center slit is smaller than the area of each of the plurality of side slits. A width of each of the plurality of side slits is larger than an interval between the adjacent slits.
摘要翻译： 在内置永磁电动机中，在转子的转子外周面和磁铁插入孔的径向外插入孔轮廓面之间形成有至少一个磁极中心狭缝和多个侧缝。 形成多个侧缝，使得在磁极中心狭缝的宽度方向的两侧的每一侧形成至少一个侧缝。 磁极中心狭缝的面积小于多个侧缝隙的面积。 多个侧狭缝中的每一个的宽度大于相邻狭缝之间的间隔。
-
公开(公告)号：US20230091530A1
公开(公告)日：2023-03-23
申请号：US17910167
申请日：2020-04-20
发明人： Masahiro NIGO , Yuji HIROSAWA
IPC分类号： H02K1/276
摘要： A rotor core includes a magnet insertion hole in which a magnet is disposed and an opening connected to the magnet insertion hole. The opening has an outer end edge and an inner end edge facing each other. The opening has a first portion where the outer and inner end edges face each other across a width W1, and a second portion where the outer and inner end edges face each other across a width W2 wider than the width W1. The second portion is located between the first portion and the permanent magnet. A reference line is defined as a straight line obtained by extending a magnetic pole surface of the permanent magnet on a radially outer side a plane perpendicular to the axis. At least a part of the first portion is located on an outer side in the radial direction with respect to the reference line.
-
公开(公告)号：US20220263362A1
公开(公告)日：2022-08-18
申请号：US17626880
申请日：2019-07-30
发明人： Emi TSUKAMOTO , Masahiro NIGO
摘要： An electric motor includes: a permanent magnet; a rotor including a first rotor core having a first electrical steel sheet and a second rotor core having a second electrical steel sheet; and a stator including a stator core. The first electrical steel sheet is located outside the stator core. A relationship among a minimum width BL1 of a first left bridge, a thickness tL1 of the first left bridge, a minimum width BR1 of a first right bridge, a thickness tR1 of the first right bridge, a minimum width BL2 of a second left bridge, a thickness tL2 of the second left bridge, a minimum width BR2 of a second right bridge, and a thickness tR2 of the second right bridge satisfies (BL1×tL1+BR1×tR1)>(BL2×tL2+BR2×tR2).
-
公开(公告)号：US20200186073A1
公开(公告)日：2020-06-11
申请号：US16614508
申请日：2017-07-25
发明人： Masahiro NIGO , Yuji HIROSAWA
摘要： A driving device includes a connection switching unit to switch a connection state of coils between a first connection state and a second connection state in which a line voltage is lower than in the first connection state, a controller to control a motor and the connection switching unit, and a rotation speed detector to detect a rotation speed of the motor. When the connection state of the coils is the first connection state and the rotation speed detected by the rotation speed detector becomes higher than or equal to a first rotation speed, the controller causes the motor to rotate at a second rotation speed higher than the first rotation speed, and then causes the connection switching unit to switch the connection state of the coils from the first connection state to the second connection state.
-
-
-
-
-
-
-
-
-
搜索结果
56 条记录 (耗时 0.024 秒)
