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公开(公告)号：US20210288531A1
公开(公告)日：2021-09-16
申请号：US17232335
申请日：2021-04-16
Applicant: DENSO CORPORATION
Inventor： Yuki TAKAHASHI
Abstract: A rotating electrical machine has a magnetic field-producing unit, an armature with armature windings for multiple phases, and a rotor implemented by one of the magnetic field-producing unit and armature. The armature winding of each phase has a conductor portion. The conductor portion is made of a bundle of wires and has a resistance value between the bundled wires larger than that within each of the wires. Each conductor portion includes magnet facing portions arranged at a given interval away from each other and face the magnet unit. The magnet facing portions of the same phase are connected in series. The wires of the conductor portion of the same phase are connected in parallel. The order of locations of the wires of each of the magnet facing portions for the same phase is different between given portions of the magnet facing portion in an axial direction of the rotor.
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公开(公告)号：US20210249922A1
公开(公告)日：2021-08-12
申请号：US17245869
申请日：2021-04-30
Applicant: DENSO CORPORATION
Inventor： Yuki TAKAHASHI , Kazuya IWASE
Abstract: In a rotating electrical machine, a field generator includes a magnet unit and a cylindrical magnet holder. The magnet unit includes circular-arc magnets arranged in the circumferential direction. Each magnet has an outer peripheral surface. The magnet unit includes a magnet fastening member configured to fasten the magnets. Each magnet has first and second end surfaces in the circumferential direction. The first end surface of each magnet is located to be in contact with the magnet located adjacent to the first end surface thereof. The second end surface of each magnet is located to be in contact with the magnet located adjacent to the second end surface thereof. The magnet fastening member is wound around the outer peripheral surfaces of the circumferentially arranged magnets to radially and inwardly press the outer peripheral surfaces of the circumferentially arranged magnets.
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公开(公告)号：US20210211006A1
公开(公告)日：2021-07-08
申请号：US17208484
申请日：2021-03-22
Applicant: DENSO CORPORATION
Inventor： Yuki TAKAHASHI
Abstract: A rotor including a magnet and a rotor core. The magnet includes a pair of shoulders and a housing hole configured to house the magnet such that the pair of shoulders are arranged in a circumferential direction. The rotor core includes an inner core, a pair of supporters, and a covering portion. The inner core is located radially inward of the housing hole. The pair of supporters is located radially outward of the inner core and arranged in the circumferential direction through the housing hole. The covering portion connects between the pair of supporters. The supporters are configured to support the magnet by holding the pair of shoulders. The covering portion is configured to cover the magnet from radially outside of the magnet and has a thin portion connected to at least the pair of supporters.
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公开(公告)号：US20200336033A1
公开(公告)日：2020-10-22
申请号：US16915566
申请日：2020-06-29
Applicant: DENSO CORPORATION
Inventor： Yuki TAKAHASHI
Abstract: A rotating electric machine includes a field system and an armature. The field system includes a magnet section having a plurality of magnetic poles whose polarities alternate in a circumferential direction. The armature includes a multi-phase armature coil. Either of the field system and the armature is configured as a rotor. The magnet section is configured to have an easy axis of magnetization oriented such that the closer the position to a d-axis in the circumferential direction, the more the direction of the easy axis of magnetization becomes parallel to the d-axis.
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公开(公告)号：US20200328658A1
公开(公告)日：2020-10-15
申请号：US16914605
申请日：2020-06-29
Applicant: DENSO CORPORATION
Inventor： Yuki TAKAHASHI
Abstract: In a rotating electrical machine, of both ends of a stator winding of each phase, an end portion on a neutral point side is a first end portion, and an end portion on a connection point side of an upper arm switch and a lower arm switch of an inverter is a second end portion. The rotating electrical machine includes a neutral-point bus bar that electrically and mechanically connects the first end portions of the phases to one another. The first end portion and the second end portion of each phase is arranged in an end portion on a same side in an axial direction of a stator. The neutral-point bus bar and the second end portion of each phase are mechanically connected with an insulating sheet therebetween.
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Patent Agency Ranking
公开(公告)号：US20200244121A1
公开(公告)日：2020-07-30
申请号：US16779829
申请日：2020-02-03
Applicant: DENSO CORPORATION
Inventor： Yuki TAKAHASHI
IPC: H02K1/27 , H02K1/30 , H02K21/14 , H02K15/12 , H02K15/03 , H02K1/16 , H02K1/18 , H02K3/28 , H02K3/12 , H01F1/22
Abstract: A rotor of a rotary electric machine includes magnets arranged to face a winding. The magnets are movable relative to the winding upon the winding being energized. The magnets are arranged in a relative movement direction while magnetic polarities based on the magnets are alternately changed. Each magnet includes a first magnet member configured to generate magnet flux in accordance with a corresponding one of the polarities. The first magnet member has first magnetic orientations defined therein. Each magnet includes a second magnet member provided at a q-axis side end of the corresponding magnet located closer to a pole boundary. The second magnet member has second magnetic orientations defined therein. The second magnetic orientations intersect with the first magnetic orientations.
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公开(公告)号：US20200162003A1
公开(公告)日：2020-05-21
申请号：US16748535
申请日：2020-01-21
Applicant: DENSO CORPORATION
Inventor： Yuki TAKAHASHI , Makoto TANIGUCHI
Abstract: A rotating electrical machine includes a magnetic field-producing unit, an armature with a multi-phase armature winding, and a rotor. The magnetic field-producing unit includes a first portion and a second portion. The first portion is located closer to a d-axis in a d-q axis coordinate system than the second position is. The second position is located closer to a q-axis in the d-q axis coordinate system than the first position is. The magnetic field-producing unit is magnetically oriented to meet a condition where an angle which an easy axis of magnetization of the first portion makes with the d-axis is smaller than an angle which an easy axis of magnetization of the second portion makes with the q-axis. The magnetic field-producing unit is configured to have an intrinsic coercive force of 400 kA/m and also have a remanent flux density of 1.0 T or more.
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公开(公告)号：US20200161950A1
公开(公告)日：2020-05-21
申请号：US16748064
申请日：2020-01-21
Applicant: DENSO CORPORATION
Inventor： Yuki TAKAHASHI
Abstract: A rotary electrical machine including an annular stator having a stator core around which an armature winding is wound, and a rotor arranged on an inner circumference of the stator, a permeance of a q-axis magnetic circuit is made larger than a permeance of a d-axis magnetic circuit. The machine includes a switch for supplying power to a field winding and controller. The controller calculates the duty ratio on the condition that an upper limit of the duty ratio of the switch is a predetermined value and turns on/off the switch based on the calculated ratio. The predetermined value is set to a value larger than the duty ratio corresponding to the field current that gives the maximum reduction amount of the inductance of the field winding with respect to an increasing amount of the field current in a range that the current can take and is less than 100%.
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公开(公告)号：US20190131833A1
公开(公告)日：2019-05-02
申请号：US16306767
申请日：2017-06-01
Applicant: DENSO CORPORATION
Inventor： Yuki TAKAHASHI , Tomokazu HISADA
Abstract: A vehicle alternating-current power generator includes a stator formed by winding an armature winding on a stator core and a rotor arranged on the radial inside of the stator. The rotor includes a field core having a boss part and a plurality of claw-shaped magnetic pole parts, a field winding that is wound on the outer peripheral side of the boss part, and a permanent magnet that is arranged between the circumferentially adjacent claw-shaped magnetic pole parts. A d-axis magnetic circuit formed by magnetomotive force of the field winding and at least part of first and second magnet magnetic circuits formed by magnetic force of the permanent magnet are shared. When an electrical load is connected to the rotor, the relationship between a permeance Prt of the d-axis magnetic circuit and a permeance Pst of a q-axis magnetic circuit is set to satisfy Pst>Prt.
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公开(公告)号：US20160308414A1
公开(公告)日：2016-10-20
申请号：US15098436
申请日：2016-04-14
Applicant: DENSO CORPORATION
Inventor： Yuki TAKAHASHI
Abstract: A rotating electric machine includes a housing, a rotating shaft rotatably supported by the housing, a rotor fixed on the rotating shaft, a stator and a cooling device. The stator includes a stator core located radially outside the rotor and a stator coil wound on the stator core so as to have a coil end protruding from an axial end face of the stator core. The cooling device is configured to supply cooling liquid to an upper part of the coil end of the stator coil. The housing has a cooling liquid-receiving portion located vertically under the upper part of the coil end of the stator coil so as to receive the cooling liquid falling down from the upper part of the coil end. In a space formed inside the cooling liquid-receiving portion of the housing, there is arranged at least one of an electrical component and a heat sink.
Abstract translation: 旋转电机包括壳体，由壳体可旋转地支撑的旋转轴，固定在旋转轴上的转子，定子和冷却装置。 定子包括位于转子径向外侧的定子芯和缠绕在定子芯上的定子线圈，以便具有从定子芯的轴向端面突出的线圈端。 冷却装置构成为将冷却液供给到定子线圈的线圈端的上部。 壳体具有位于定子线圈的线圈端的上部垂直下方的冷却液体接收部，以便接收从线圈端部的上部落下的冷却液。 在形成在壳体的冷却液接收部内的空间中，设置有电气部件和散热器中的至少一个。
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