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1.发明公开公开(公告)号：US20230204667A1
公开(公告)日：2023-06-29
申请号：US17927903
申请日：2020-07-08
发明人： Yuji TAKIZAWA , Atsushi YAMAMOTO , Susumu MAEDA , Nobuaki MUROKI
CPC分类号： G01R31/346 , G01R31/52
摘要： A short-circuit detection device for a rotating electric machine sets an order lower than a fundamental order of a slot harmonic wave as a threshold value, and reduces, among the plurality of frequency components, even-order frequency components having orders higher than the threshold value and odd-order frequency components, converts a plurality of frequency components output from the specific frequency component reduction unit into a voltage signal, generates a difference waveform of voltage signals respectively corresponding to adjacent magnetic poles, detects a short-circuit of a field winding based on a shape of the difference waveform, and estimates a short-circuit position of the field winding, and determines an estimation accuracy of the short-circuit position of the field winding based on a degree of symmetry of a waveform of a maximum wave with respect to a peak angle of the difference waveform serving as a center.
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公开(公告)号：US20220407402A1
公开(公告)日：2022-12-22
申请号：US17791905
申请日：2020-04-16
摘要： Provided is a magnetic-geared motor that can suppress eddy current flowing inside a fastening member and reduce power loss. The magnetic-geared motor includes: a stator; a first rotor provided rotatably relative to the stator and including a plurality of magnetic pole pieces and a plurality of spacers disposed so as to be arranged in a circumferential direction; and a second rotor provided coaxially with the first rotor. Each spacer is composed of a plurality of divisional spacers disposed apart from each other in an axial direction, and a plurality of fastening tools for fastening the plurality of divisional spacers in the axial direction, and the divisional spacers and the fastening tools are electrically insulated from each other.
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3.发明申请公开(公告)号：US20220376645A1
公开(公告)日：2022-11-24
申请号：US17771819
申请日：2020-01-27
IPC分类号： H02P29/024 , G01R31/34
摘要： Provided are a short circuit state analyzer to compare difference value when the AC excitation current is applied at a first frequency with a threshold value, to estimate a short circuit resistance from the difference value based on data indicating a relationship between the short circuit resistance and the difference value at the first frequency when the difference value is smaller than the threshold value, to cause an excitation power supply to apply the AC excitation current to the field windings at a second frequency lower than the first frequency when the difference value is equal to or greater than the threshold value, and to estimate the short circuit resistance from a difference value obtained by the AC excitation current at the second frequency based on data indicating a relationship between the short circuit resistance and the difference value at the second frequency.
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公开(公告)号：US20220146593A1
公开(公告)日：2022-05-12
申请号：US17438477
申请日：2019-04-12
发明人： Yuji TAKIZAWA , Haruyuki KOMETANI , Kenta MOTOYOSHI , Atsushi YAMAMOTO , Susumu MAEDA , Nobuaki MUROKI
摘要： Provided is a short-circuit detection device including: a signal acquisition unit configured to acquire, from a magnetic flux detector configured to detect a magnetic flux generated in an air gap between a rotor and a stator of a rotating electric machine, a detection signal corresponding to the magnetic flux; a signal processing unit configured to subject the detection signal acquired by the signal acquisition unit to filtering of removing at least one component of odd-order components included in the detection signal, to thereby generate a filtered signal being the detection signal subjected to the filtering; and a short-circuit detection unit configured to detect a short circuit of a field winding through use of the filtered signal generated by the signal processing unit.
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5.发明申请MULTIPLE-POLYPHASE AC DYNAMO-ELECTRIC MACHINE AND ELECTRIC POWER STEERING DEVICE 审中-公开多相交流动力电动机和电动转向装置公开(公告)号：US20160172918A1
公开(公告)日：2016-06-16
申请号：US14768316
申请日：2013-05-31
发明人： Yu HIROTANI , Yuji TAKIZAWA , Sachiko KAWASAKI , Masatsugu NAKANO , Toyoaki UDO , Satoru AKUTSU
摘要： A multiple-polyphase AC dynamo-electric machine, wherein each of the plurality of the teeth provides the flange part to the NS magnetic pole part of the rotor side end part, the stator core has a magnetic connection part which connects the flange parts adjoined each other in the NS magnetic pole of each of the plurality of teeth, the connection part is provided corresponding to each of the slot and an inner peripheral side of the corresponding slot, the radial width of the connection part are smaller than both of the circumferential width of the teeth, thereby the radial widths of the connecting sections are smaller than both the circumferential widths of the teeth and the radial widths of the flanges, voltages generated when the magnetic flux generated by current flowing through one group of windings links with the windings in another group are suppressed effectively.
摘要翻译： 一种多相交流发电机，其中，所述多个齿中的每一个将所述凸缘部分提供给所述转子侧端部的所述NS磁极部，所述定子铁心具有磁性连接部，所述磁性连接部将连接每个所述凸缘部 另一方面，在多个齿的NS磁极中，对应于槽的每一个和相应槽的内周侧设置连接部，连接部的径向宽度小于周向宽度 因此连接部分的径向宽度小于齿的圆周宽度和凸缘的径向宽度，当流过一组绕组的电流产生的磁通与绕组连接时产生的电压 另一组被有效地压制。
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公开(公告)号：US20160036281A1
公开(公告)日：2016-02-04
申请号：US14783104
申请日：2013-07-22
发明人： Masatsugu NAKANO , Yu HIROTANI , Yuji TAKIZAWA , Satoru AKUTSU , Toyoaki UDO
CPC分类号： H02K3/28 , H02K1/16 , H02K1/165 , H02K1/2706 , H02K1/276 , H02K1/2773 , H02K1/278 , H02K7/14 , H02K11/0094 , H02K11/215 , H02K11/33 , H02K29/03 , H02K29/08 , H02K2201/03 , H02K2213/03 , H02P25/22
摘要： A permanent magnet motor is provided in which, in flanges each provided in a plurality of teeth, lateral side portions of the flanges oppose to lateral side portions the flanges being provided in adjacent teeth and protruding in a circumferential direction of a stator core; when a height in the lateral side portion of the flanges in a radial direction of the stator core is defined as “h,” and the length of a magnetic air gap is defined as “g,” the relationship “1≦h/g≦2” is held; and also, when a circumferential distance between opposing faces of the flanges being adjacent to each other is defined as “a,” the relationship “a/g≧0.2” is satisfied.
摘要翻译： 提供一种永久磁铁马达，其中在每个设置有多个齿的凸缘中，凸缘的横向侧部与侧向侧面相对，凸缘设置在相邻的齿中并沿定子芯的圆周方向突出; 当定子铁心的径向方向上的凸缘的侧面侧的高度被定义为“h”，并且将磁性气隙的长度定义为“g”时，关系式“1＆nlE; h / g＆ 2“举行; 并且当法兰的相对面彼此相邻的周向距离被定义为“a”时，满足关系“a /g≥0.2”。
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公开(公告)号：US20210135513A1
公开(公告)日：2021-05-06
申请号：US16617022
申请日：2017-09-07
发明人： Yuji TAKIZAWA , Hiroko IKEDA , Kazumasa ITO , Shinich YAMAGUCHI , Yu HIROTANI , Satoru AKUTSU
IPC分类号： H02K1/16 , H02K3/28 , H02K21/24 , H02K11/215
摘要： A permanent-magnet synchronous motor and an electric power steering device are driven by a first system including a first armature winding and a first control apparatus and by a second system including a second armature winding and a second control apparatus and are configured in such a way that if one system fails, driving by the one system is stopped but the driving is continued by the other system.
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8.发明申请公开(公告)号：US20210075273A1
公开(公告)日：2021-03-11
申请号：US17044677
申请日：2019-03-20
发明人： Hiroko IKEDA , Shinichi YAMAGUCHI , Yuji TAKIZAWA , Yu HIROTANI , Kazumasa ITO
摘要： A stator includes a core back portion, a plurality of teeth extending inward in a radial direction of the stator from the core back portion, a first system coil portion and a second system coil portion wound on each of the teeth, and a magnetic interference reduction member provided between the first system coil portion and the second system coil portion to reduce magnetic interference between the first system coil portion and the second system coil portion. Further, the first system coil portion and the second system coil portion are connected to mutually different power supply sources, that is, the first system coil portion and the second system coil portion are each connected to a first system power supply source or a second system power supply source.
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公开(公告)号：US20190058383A1
公开(公告)日：2019-02-21
申请号：US16071931
申请日：2016-05-10
发明人： Yuji TAKIZAWA , Yu HIROTANI
摘要： Each of a plurality of permanent-magnet pairs is configured with a pair of permanent magnets that are arranged in a v-shaped manner in such a way that the distance between the portions of the permanent magnets, facing each other at the outer side in the radial direction of the rotor core, is smaller than the distance between the portions thereof, facing each other at the inner side in the radial direction of the rotor core; a magnetic-field pole is formed of part, of the rotor core, that is situated between the adjacent permanent-magnet pairs.
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公开(公告)号：US20190023315A1
公开(公告)日：2019-01-24
申请号：US16070341
申请日：2016-03-14
发明人： Yuji TAKIZAWA , Satoru AKUTSU , Yoshihito ASAO
摘要： To provide an electric motor control system and an electric power steering apparatus that torque of the electric motor can be increased for ensuring of steering performance even at the time of abnormality occurrence. The controller is provided with 2 sets of control systems which control a supply current to each set of the windings. When abnormality occurs in one set of the windings and the control system, the electric motor control system sets 0 to supply current to all phase or partial phase windings of abnormality occurrence set, and increase supply current to normal set of the windings up to an irreversible current that increase an irreversible demagnetizing factor of the permanent magnet more than the normal time.
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