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公开(公告)号：US20240266893A1
公开(公告)日：2024-08-08
申请号：US18564164
申请日：2021-08-27
Applicant: HITACHI ASTEMO, LTD.
Inventor： Yuji KOBAYASHI , Yasuyuki SAITO , Miku TAKAHASHI , Hiroki NARUSHIMA
CPC classification number: H02K1/276 , B60K6/26 , B60Y2200/92 , B60Y2400/60 , H02K29/03
Abstract: A rotor for a rotary electric machine, and a rotary electric machine using the same include a pair of first magnets arranged in a V shape, and a pair of second magnets, magnet holes are provided with a first magnetic vacancy facing a d-axis with the first magnet interposed therebetween, and a second magnetic vacancy facing the d-axis with the second magnet interposed therebetween, the distance from the d-axis to an end portion of the first magnetic vacancy is made larger than the distance from the d-axis to an end portion of the second magnet in an outermost diameter side when viewed in a direction perpendicular to the d-axis, the distance between the first magnetic vacancy and the second magnetic vacancy in an outermost diameter side is smaller than the distance between the second magnetic vacancies adjacent to each other in a plurality of magnetic poles, and the V-shape formed by the pair of first magnets has an inside angle with a magnitude which is larger than that of the inside angle formed by the pair of second magnets.
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Patent Agency Ranking
公开(公告)号：US20240120793A1
公开(公告)日：2024-04-11
申请号：US18264338
申请日：2021-08-31
Applicant: HITACHI ASTEMO, LTD.
Inventor： Miku TAKAHASHI , Yuji KOBAYASHI , Yasuyuki SAITO , Noriaki HINO , Shinji YAMAZAKI , Takuya MIYAGI , Keisuke TATENO
Abstract: Provided are a stator for a rotary electric machine and the rotary electric machine. The stator includes a stator core, and a stator winding formed in a plurality of phases, the stator winding including a slot conductor and a crossover conductor configured to connect ends of a pair of the slot conductors, the ends placed at a same side of the pair of slot conductors. With the stator, the stator winding includes a plurality of phase winding groups configured to forma plurality of parallel circuits in each of the plurality of phases; the crossover conductor in each of the plurality of phase winding groups includes, at one of the coil ends, a first crossover conductor configured to connect the pair of slot conductors at Np=N1, and a second crossover conductor configured to connect the pair of slot conductors at Np=N1+Nspp, where Np represents a slot pitch, N1 represents a predetermined natural number, and Nspp represents a number of the plurality of slots per pole and phase; and the first crossover conductor and the second crossover conductor are alternately arranged in a circumferential direction of the stator core.
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公开(公告)号：US20230238911A1
公开(公告)日：2023-07-27
申请号：US17928733
申请日：2021-06-10
Applicant: Hitachi Astemo, Ltd.
Inventor： Yuji KOBAYASHI , Yasuyuki SAITO , Takayuki NITTA , Yoshinori AOSHIMA , Hiroyuki TAKEMOTO
CPC classification number: H02P29/64 , G01K7/22 , B60W10/08 , H02P6/08 , B60L3/0061
Abstract: A motor control system includes a three-phase motor winding; and a thermistor that measures a temperature of any one or two of coils of the three-phase motor winding, the motor control system including a coil temperature estimation unit that calculates an estimated temperature of each of the three-phase coils based on a value of a current flowing through the three-phase motor winding. The motor is controlled based on the estimated temperature of the three-phase motor winding when a difference between the estimated temperatures of the three-phase motor winding is larger than a predetermined value. The motor is controlled based on a measured value of the thermistor when the difference between the estimated temperatures of the three-phase motor winding is equal to or less than the predetermined value.
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公开(公告)号：US20210328473A1
公开(公告)日：2021-10-21
申请号：US17220170
申请日：2021-04-01
Applicant: Hitachi Astemo, Ltd.
Inventor： Yuji KANO , Takayuki KOIZUMI , Yasuyuki SAITO , Seigo MISAKI , Hisaya SHIMIZU
Abstract: Provided is a rotary electric machine which is configured to draw three-phase output lines from a connection side coil end by an easy process. A stator for a rotary electric machine according to the present invention includes a plurality of segment coils including connection-side winding portions and non-connection-side winding portions. The connection-side winding portions are arranged on one side of a stator core and connected to slots with the same slot pitch, and the non-connection-side winding portions are arranged on the other side of the stator core and inserted into the slots with a plurality of kinds of slot pitches. The connection-side winding portions include a first connection group and a second connection group. The first connection group is provided with a plurality of terminal portions for connecting the segments, and the second connection group connects layers different from those in the first connection group, and is provided with a plurality of terminal portions.
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公开(公告)号：US20240204623A1
公开(公告)日：2024-06-20
申请号：US18554821
申请日：2022-02-02
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takayuki NITTA , Yasuyuki SAITO , Motoo KITAHARA , Tomoyuki NAKADE
Abstract: A rotating electrical machine includes a coil wound in a distributed square wire manner, a stator core forming a slot that stores the coil, a temperature sensor that detects a temperature of the coil, and a housing that houses the stator core. The temperature sensor includes a support member that supports the temperature sensor by being connected and fixed to the housing, and the support member includes a communication portion communicating with a coil space formed by the stator core and adjacent coils among coils housed in slots.
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公开(公告)号：US20240030770A1
公开(公告)日：2024-01-25
申请号：US18373156
申请日：2023-09-26
Applicant: Hitachi Astemo, Ltd.
Inventor： Yuji KANO , Takayuki KOIZUMI , Yasuyuki SAITO , Seigo MISAKI , Hisaya SHIMIZU
Abstract: Provided is a rotary electric machine which is configured to draw three-phase output lines from a connection side coil end by an easy process. A stator for a rotary electric machine according to the present invention includes a plurality of segment coils including connection-side winding portions and non-connection-side winding portions. The connection-side winding portions are arranged on one side of a stator core and connected to slots with the same slot pitch, and the non-connection-side winding portions are arranged on the other side of the stator core and inserted into the slots with a plurality of kinds of slot pitches. The connection-side winding portions include a first connection group and a second connection group. The first connection group is provided with a plurality of terminal portions for connecting the segments, and the second connection group connects layers different from those in the first connection group, and is provided with a plurality of terminal portions.
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