公开(公告)号：US20210226499A1

公开(公告)日：2021-07-22

申请号：US17205026

申请日：2021-03-18

Applicant: DENSO CORPORATION

Inventor： Masahiro SEGUCHI

IPC: H02K3/28 ,  H02K1/22

Abstract: A field coil type rotating electric machine includes a field coil having first and second windings connected in series with each other, a rotor having main poles on which the first and second windings are wound, and a stator having a stator coil comprised of phase windings to which harmonic currents are respectively supplied to induce field current in the field coil. In the rotor, there are formed a series resonant circuit including the first winding and a capacitor and a parallel resonant circuit including the second winding and the capacitor. The first winding is radially located closer to the stator than the second winding is. Moreover, N1

公开(公告)号：US20200251940A1

公开(公告)日：2020-08-06

申请号：US16778068

申请日：2020-01-31

Applicant: DENSO CORPORATION

Inventor： Masahiro SEGUCHI

IPC: H02K1/24 ,  H02K3/28 ,  H02K19/12

Abstract: A field coil type rotating electric machine includes a field coil having a serially-connected coil section pair consisting of first and second coil sections, a diode having its cathode and anode respectively connected to opposite ends of the serially-connected coil section pair, a rotating shaft, and a rotor having main pole portions radially protruding from a rotor core. In the rotating electric machine, there are formed both a series resonance circuit including the first coil section and at least one capacitor and a parallel resonance circuit including the second coil section and the at least one capacitor. Electronic components electrically connected with the field coil, which include the diode and the at least one capacitor, are arranged so that an overall center of gravity of all the electronic components is located closer than each of centers of gravity of the electronic components to a central axis of the rotating shaft.

公开(公告)号：US20130270958A1

公开(公告)日：2013-10-17

申请号：US13861836

申请日：2013-04-12

Applicant: DENSO CORPORATION

Inventor： Yuki TAKAHASHI ,  Masahiro SEGUCHI

IPC: H02K1/27

CPC classification number: H02K1/274 ,  H02K1/276 ,  H02K1/2766 ,  H02K21/14 ,  H02K29/03 ,  H02K2201/06 ,  H02K2213/03

Abstract: A rotary electric machine includes a stator and a rotor located in a rotatable manner relative to the stator via a gap. The stator includes a multi-phase stator winding that is held in a plurality of slots formed in the stator. The rotor includes at least one magnet section embedded therein so as to face the slots. The magnet section includes a plurality of axially laminated magnets with a skew angle which is an angle of a positional difference between the magnets. This skew angle θs is set so as to satisfy θs=kα/2 where α is a slot pitch which is an angle between the slots, and k is a coefficient set based on: an arc ratio θa being an angle covering an area in which magnetic flux radially flows from the magnetic section; and a slot factor S being a ratio of the slots relative to the magnet section.

Abstract translation: 一种旋转电机包括定子和转子，该定子以相对于定子的间隙可转动地定位。 定子包括保持在形成在定子中的多个槽中的多相定子绕组。 转子包括嵌入其中的至少一个磁体部分以面对槽。 磁体部分包括多个轴向层叠的磁体，其具有作为磁体之间的位置差的角度的倾斜角度。 该偏斜角度被设定为满足tas = kalpha / 2，其中α是狭缝之间的角度的狭缝间距，并且k是基于以下的系数集合：圆弧比θa是覆盖其中 磁通从磁性部分径向流动; 并且槽因子S是槽相对于磁体部分的比率。

公开(公告)号：US20140125186A1

公开(公告)日：2014-05-08

申请号：US14073023

申请日：2013-11-06

Applicant: DENSO CORPORATION

Inventor： Yuki TAKAHASHI ,  Masahiro SEGUCHI ,  Hideaki SUZUKI

IPC: H02K3/28

CPC classification number: H02K3/28 ,  H02K3/12 ,  H02K2213/03

Abstract: In a stator having a stator core and three phase windings, slots are formed in the stator core. The phase winding are accommodated in layers, from one side to the other side in the corresponding slot along a radial direction of the stator core. The phase windings are arranged in a star-delta composite connection structure. The phase winding in each phase is comprised of conductors accommodated in a first slot and a second slot adjacently arranged in the stator core so that the conductor in the n-th layer is electrically connected to the conductor in the (n+1)-th layer, ascending order, per slot. Because each winding has the same length and no difference in electric potential occurs between the star connection and the delta connection, this structure suppress generation of operation noise and a circulating current through the stator core and prevents loss due to the circulating current.

Abstract translation: 在具有定子铁心和三相绕组的定子中，在定子铁芯中形成有槽。 相绕组沿着定子芯的径向从相对应的槽中的一侧到另一侧分层地容纳。 相绕组布置成星形 - 三角形复合连接结构。 每相中的相绕组包括容纳在第一槽中的导体和相邻布置在定子芯中的第二槽，使得第n层中的导体在第（n + 1）次中与导体电连接 层，升序，每个插槽。 因为每个绕组具有相同的长度，并且在星形连接和三角形连接之间没有发生电位差，所以这种结构抑制了运行噪声的产生和通过定子铁心的循环电流并且防止由于循环电流引起的损耗。

公开(公告)号：US20140125185A1

公开(公告)日：2014-05-08

申请号：US14069677

申请日：2013-11-01

Applicant: DENSO CORPORATION

Inventor： Hideaki SUZUKI ,  Masahiro SEGUCHI ,  Yuki TAKAHASHI

IPC: H02K3/28

CPC classification number: H02K3/28 ,  H02K3/14

Abstract: A stator includes a hollow cylindrical stator core and a stator coil. The stator core has a plurality of slots formed therein. The stator coil is provided in the slots of the stator core in a plurality of layers in a radial direction of the stator core, and includes a first winding and a second winding. The first winding extends around the stator core so as to be located at the (2n−1)th and 2nth layers of the stator coil, and has an end located at the 2nth layer, where n is a natural number. The second winding extends around the stator core so as to be located at the (2n+1)th and (2n+2)th layers of the stator coil, and has an end located at the (2n+1)th layer. The ends of the first and second windings, which are respectively located at the 2nth and (2n+1)th layers, are electrically connected to each other.

Abstract translation: 定子包括中空圆柱形定子芯和定子线圈。 定子芯具有形成在其中的多个槽。 定子线圈在定子铁芯的径向方向上设置在定子铁芯的槽中，并且包括第一绕组和第二绕组。 第一绕组围绕定子铁心延伸，以便位于定子线圈的第（2n-1）和第2n层，并且具有位于第2n层的端，其中n是自然数。 第二绕组围绕定子铁心延伸，以便位于定子线圈的第（2n + 1）和（2n + 2）层，并且具有位于第（2n + 1）层的端部。 分别位于第2n和第（2n + 1）层的第一和第二绕组的端部彼此电连接。

公开(公告)号：US20190312539A1

公开(公告)日：2019-10-10

申请号：US16448519

申请日：2019-06-21

Applicant: DENSO CORPORATION

Inventor： Masahiro SEGUCHI ,  Junichi NAKAZONO

IPC: H02P25/098

Abstract: A field winding type rotating electric machine includes: a stator armature winding wound on a stator core; a rotor field winding wound on a rotor core; a rectifying element connected to both ends of the rotor field winding; a capacitor having one end connected to one end of the rectifying element and the other end connected between the two ends of the rotor field winding; and a control circuit configured to supply electric current, which includes a fundamental component for generating rotational torque and a harmonic component having a shorter period than the fundamental component and superimposed on the fundamental component, to the stator armature winding and thereby induce excitation current in the rotor field winding. Moreover, an inductance of the rotor field winding and a capacitance of the capacitor are in a resonant relationship with a frequency of the harmonic component.

公开(公告)号：US20190296672A1

公开(公告)日：2019-09-26

申请号：US16440263

申请日：2019-06-13

Applicant: DENSO CORPORATION

Inventor： Masahiro SEGUCHI ,  Junichi NAKAZONO

IPC: H02P23/26

Abstract: A field winding type rotating electric machine, whose power factor is cos θ, includes a stator, a rotor with a field winding, a rectifying element, a drive unit and a control unit. When performing rectangular-wave or overmodulation energization, the control unit generates a voltage pulse pair, which induces a current pulse pair, by: setting a reference time to the center of an ON duration or OFF duration of a control signal of a first phase; and providing a temporary ON duration and a temporary OFF duration after a predetermined angle from the reference time. The predetermined angle is within a predetermined range including cos−1 θ in electrical angle. The temporary ON duration is provided to temporarily turn ON a control signal of a second phase during an OFF duration thereof. The temporary OFF duration is provided to temporarily turn OFF a control signal of a third phase during an ON duration thereof.

公开(公告)号：US20190207491A1

公开(公告)日：2019-07-04

申请号：US16296962

申请日：2019-03-08

Applicant: DENSO CORPORATION

Inventor： Masahiro SEGUCHI

IPC: H02K19/12 ,  H02K1/16 ,  H02K1/26 ,  H02K3/12 ,  H02K3/48 ,  H02K11/042 ,  H02K11/028 ,  H02M7/217 ,  H02K19/36 ,  H02K19/26

CPC classification number: H02K19/12 ,  H02K1/16 ,  H02K1/26 ,  H02K3/12 ,  H02K3/48 ,  H02K11/028 ,  H02K11/042 ,  H02K19/26 ,  H02K19/36 ,  H02M7/217

Abstract: A field winding type rotary machine includes a stator having a stator core and a stator coil wound on the stator core, a rotor having a rotor core and a rotor field coil wound on the rotor core, and a rectifier element connected between both ends of the rotor field coil. The field winding type rotary machine includes a capacitor having a first terminal connected to an anode terminal of the rectifier element and a second terminal connected to any point of the rotor field coil.

公开(公告)号：US20210226489A1

公开(公告)日：2021-07-22

申请号：US17201714

申请日：2021-03-15

Applicant: DENSO CORPORATION

Inventor： Masahiro SEGUCHI

IPC: H02K1/24 ,  H02K19/12 ,  H02K3/487 ,  H02K19/26

Abstract: A field coil type rotating electric machine includes a stator and a rotor. The stator includes a stator core, stator teeth arranged in a circumferential direction and each radially protruding from the stator core, and a stator coil wound on the stator teeth. The rotor includes a rotor core, main poles arranged in the circumferential direction and each radially protruding from the rotor core, and a field coil wound on the main poles. Each of the stator teeth and the main poles extends in an axial direction. Each of the main poles has a pair of main-pole end portions located respectively at circumferential ends of the main pole and both radially facing the stator. For each of the main poles, in at least one of the main-pole end portions of the main pole, there is formed at least one cut for part of an axial length of the main pole.

公开(公告)号：US20200373823A1

公开(公告)日：2020-11-26

申请号：US16881426

申请日：2020-05-22

Applicant: DENSO CORPORATION

Inventor： Masahiro SEGUCHI

IPC: H02K23/66

Abstract: A field coil type rotating electric machine includes a rotor where both a series resonant circuit including a first winding and a capacitor and a parallel resonant circuit including a second winding and the capacitor are formed. The first winding is radially located closer than the second winding to a stator. The capacitance of the capacitor and the ratio of the number of turns of the second winding to the number of turns of the first winding are set to have the amplitude of a total resultant magnetic flux lower than the amplitude of a field resultant magnetic flux. The total resultant magnetic flux is the resultant of the field resultant magnetic flux and magnetic flux generated by harmonic currents flowing in phase windings of a stator coil. The field resultant magnetic flux is the resultant of magnetic fluxes generated by harmonic currents flowing in the first and second windings.