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公开(公告)号：US12113415B2
公开(公告)日：2024-10-08
申请号：US17741566
申请日：2022-05-11
申请人： DENSO CORPORATION
发明人： Yuki Takahashi
摘要： A rotating electric machine includes an armature that has an armature winding of multiple phases. The armature winding is configured by a conductor being wound. The conductor is configured by a plurality of wires being covered by an insulation coating in a state in which the plurality of wires are bundled. Each of the plurality of wires includes a conductor body configured to permit flow of a current, and a fusion layer that covers a surface of the conductor body. The fusion layer is configured to be thinner than the insulation coating. In the state in which the plurality of wires are bundled, fusion layers of the plurality of wires are fused and in contact with one another.
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公开(公告)号：US12021416B2
公开(公告)日：2024-06-25
申请号：US17692710
申请日：2022-03-11
申请人： DENSO CORPORATION
发明人： Yuki Takahashi
CPC分类号： H02K11/0141 , H02K3/50 , H02K5/1735 , H02K7/085 , H02K11/215 , H02K11/33 , H02K2203/09 , H02K2213/03
摘要： In a rotating electric machine, a cylindrical portion is provided on a radially inner side of a stator core. An opposing plate portion extends toward a radially outer side from the cylindrical portion. In a rotor, a magnet portion is fixed on an inner circumferential surface, a circular cylindrical portion is provided on the radially outer side of a stator winding, and a connecting portion extends toward the radially inner side. At least respective portions that oppose the magnet portion in the axial direction of the stator core, the circular cylindrical portion, and the connecting portion contain a magnetic material. A shield portion is provided in a portion that opposes the magnet portion in the axial direction of the opposing plate portion or on an end on the opposing plate portion side in the axial direction of the magnet portion. The shield portion contains a magnetic material.
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公开(公告)号：US11990855B2
公开(公告)日：2024-05-21
申请号：US17706739
申请日：2022-03-29
申请人： DENSO CORPORATION
发明人： Minoru Ishida , Tsubasa Sakuishi , Yuki Takahashi
摘要： A drive system establishes a normal state in which a first switch is ON and a gang switch is OFF, in the case where it is determined that there is no abnormality in the state of a first rotating body driven by a first motor. In this normal state, the first motor is driven by a first inverter, while a second motor is driven by a second inverter. It the case where it is determined that there is abnormality in the state of the first rotating body, a first countermeasure state is established in which the first switch is OFF and the gang switch is ON. In this first countermeasure state, the second motor is driven by both the first inverter and the second inverter.
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公开(公告)号：US11962228B2
公开(公告)日：2024-04-16
申请号：US17481494
申请日：2021-09-22
申请人： DENSO CORPORATION
发明人： Yuki Takahashi , Makoto Taniguchi
摘要： A rotating electrical machine includes a rotor and a magnet unit. The rotating electrical machine also includes a cylindrical stator and a housing. The stator is equipped with a stator winding made up of a plurality of phase windings. The stator is arranged coaxially with the rotor and faces the rotor. The housing has the rotor and the stator disposed therein. The rotor includes a cylindrical magnet retainer to which the magnet unit is secured and an intermediate portion which connects between a rotating shaft of the rotor and the magnet retainer and extends in a radial direction of the rotating shaft. A first region located radially inside an inner peripheral surface of a magnetic circuit component made up of the stator and the rotor is greater in volume than a second region between the inner peripheral surface of the magnetic circuit component and the housing in the radial direction.
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公开(公告)号：US11843334B2
公开(公告)日：2023-12-12
申请号：US16748535
申请日：2020-01-21
申请人： DENSO CORPORATION
发明人： Yuki Takahashi , Makoto Taniguchi
摘要： 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：US11670988B2
公开(公告)日：2023-06-06
申请号：US17481494
申请日：2021-09-22
申请人： DENSO CORPORATION
发明人： Yuki Takahashi , Makoto Taniguchi
摘要： A rotating electrical machine includes a rotor and a magnet unit. The rotating electrical machine also includes a cylindrical stator and a housing. The stator is equipped with a stator winding made up of a plurality of phase windings. The stator is arranged coaxially with the rotor and faces the rotor. The housing has the rotor and the stator disposed therein. The rotor includes a cylindrical magnet retainer to which the magnet unit is secured and an intermediate portion which connects between a rotating shaft of the rotor and the magnet retainer and extends in a radial direction of the rotating shaft. A first region located radially inside an inner peripheral surface of a magnetic circuit component made up of the stator and the rotor is greater in volume than a second region between the inner peripheral surface of the magnetic circuit component and the housing in the radial direction.
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公开(公告)号：US11509176B2
公开(公告)日：2022-11-22
申请号：US16903759
申请日：2020-06-17
申请人： DENSO CORPORATION
发明人： Yuki Takahashi
摘要： A rotating electrical machine is equipped with a rotor and a stator. The rotor includes a magnet unit and a rotor core retaining the magnet unit. The rotor core is made of a stack of annular core plates and an annular end plate mounted on an end of the stack of the core plates. The end plate has a deformable wave shape. The stack of the core plates and the end plate has formed therein through-holes extending through a length thereof. Bar-shaped fastening members, such as rivets, which have flanges on ends thereof are inserted into the through-holes with the flanges pressing the end plate to elastically deform the wave shape of the end plate, thereby tightly gripping the stack of the core plates in the lengthwise direction. This minimizes concentration of stress on the core plates to eliminate a risk of damage or breakage of the rotor.
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公开(公告)号：US11489383B2
公开(公告)日：2022-11-01
申请号：US16904025
申请日：2020-06-17
申请人： DENSO CORPORATION
发明人： Yuki Takahashi
摘要： A rotating electrical machine is provided which is equipped with a rotor core and a magnet unit made up of a plurality of magnets. Each of the magnets is oriented to have an easy axis of magnetization which extends more parallel to a d-axis in a region closer to the d-axis than that in a region close to a q-axis does. The easy axis of magnetization defines a magnet-produced magnetic path. The rotor core includes d-axis protrusions through which magnetic flux passes along the d-axis and does not have q-axis protrusions through which magnetic flux passes along the q-axis. This causes a magnetic resistance in the region close to the d-axis to be lower than that in the region closer to the q-axis, thereby providing salient poles. This structure enables the rotating electrical machine to be reduced in size and have an enhanced efficiency in operation.
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公开(公告)号：US11146158B2
公开(公告)日：2021-10-12
申请号：US16748064
申请日：2020-01-21
申请人： DENSO CORPORATION
发明人： Yuki Takahashi
摘要： 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：US10886869B2
公开(公告)日：2021-01-05
申请号：US16532661
申请日：2019-08-06
申请人： DENSO CORPORATION
摘要： A control apparatus is applied to a vehicle including (i) a rotating electrical machine and (ii) a wheel speed sensor detecting a wheel speed. The control apparatus sets a rotation angle of the rotating electrical machine based on an estimated value of the rotation angle which is estimated based on a detection value of the wheel speed sensor.
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