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公开(公告)号：US10250175B2
公开(公告)日：2019-04-02
申请号：US15383439
申请日：2016-12-19
Applicant: DENSO CORPORATION
Inventor： Masahiro Seguchi
IPC: H02P25/03 , H01K1/26 , H02P25/22 , H02K1/14 , H02K1/26 , H02P27/06 , H02K19/12 , H02K3/28 , H02K19/10 , H02P9/14 , H02P9/38 , H02K11/33
Abstract: A field winding synchronous machine drive system includes a field winding synchronous machine having a stator and a rotor and a drive apparatus configured to drive the field winding synchronous machine. The stator has N m-phase stator coils wound on a stator core to create a rotating magnetic field, where N is an integer not less than 2 and m is an integer not less than 3. The rotor has at least one main field winding wound on a rotor core to create field magnetic flux. The drive apparatus includes N inverters each of which supplies m-phase alternating current to a corresponding one of the N m-phase stator coils. Specifically, each of the inverters supplies the corresponding m-phase stator coil with the m-phase alternating current which includes a fundamental-wave current and a time-harmonic current superimposed on the fundamental-wave current; the time-harmonic current has a shorter period than the fundamental-wave current.
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公开(公告)号：US09847684B2
公开(公告)日：2017-12-19
申请号：US14069677
申请日：2013-11-01
Applicant: DENSO CORPORATION
Inventor： Hideaki Suzuki , Masahiro Seguchi , Yuki Takahashi
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.
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公开(公告)号：US11502562B2
公开(公告)日：2022-11-15
申请号：US17201714
申请日：2021-03-15
Applicant: DENSO CORPORATION
Inventor： Masahiro Seguchi
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.
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公开(公告)号：US11251688B2
公开(公告)日：2022-02-15
申请号：US16989015
申请日：2020-08-10
Applicant: DENSO CORPORATION
Inventor： Masahiro Seguchi
IPC: H02K19/28 , H02K11/049 , H02K11/33 , H02K3/46 , H02K21/04
Abstract: In a rotating electric machine, a stator includes a stator winding, a field winding includes a series-connection body including a plurality of winding portions, and a rotor includes main pole portions protruding from a rotor core in a radial direction. A harmonic current for inducing a field current in the field winding flows to the stator winding. A rectifying element is connected in series to the field winding, configures a closed circuit with the field winding, and rectifies the field current that flows to the field winding to flow in one direction. In a capacitor, a first end is connected to a connection point between adjacent winding portions and a second end is connected to either of both ends of the rectifying element. A partitioning portion is disposed between at least a single set of adjacent winding portions among the plurality of winding portions and includes a magnetic material.
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Patent Agency Ranking
公开(公告)号：US11218065B2
公开(公告)日：2022-01-04
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.
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公开(公告)号：US11196308B2
公开(公告)日：2021-12-07
申请号：US16778068
申请日：2020-01-31
Applicant: DENSO CORPORATION
Inventor： Masahiro Seguchi
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.
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公开(公告)号：US10727773B2
公开(公告)日：2020-07-28
申请号：US16448519
申请日：2019-06-21
Applicant: DENSO CORPORATION
Inventor： Masahiro Seguchi , Junichi Nakazono
IPC: H02P25/098 , H02P6/32 , H02K19/12
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.
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公开(公告)号：US10333371B2
公开(公告)日：2019-06-25
申请号：US14147631
申请日：2014-01-06
Applicant: DENSO CORPORATION
Inventor： Yuki Takahashi , Hideaki Suzuki , Masahiro Seguchi
Abstract: A stator includes a stator core, a winding, and a temperature sensor. In the stator core, a plurality of slots are formed in a circumferential direction of the stator. The winding is formed by a plurality of conductors which are housed in the slots and are electrically connected. The slots are formed such that a predetermined number of the conductors are housed and arrayed in a radial direction of the stator. The temperature sensor is located in at least one of the slots and detects temperature of the conductors.
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公开(公告)号：US09876455B2
公开(公告)日：2018-01-23
申请号：US15154268
申请日：2016-05-13
Applicant: DENSO CORPORATION
Inventor： Masahiro Seguchi
CPC classification number: H02P25/03 , H02K19/12 , H02K19/28 , H02K2201/03 , H02P2207/05
Abstract: A field winding type synchronous machine has a stator having a stator core to which a stator coil is wound, and a rotor that rotates while facing a peripheral surface of the stator with an electromagnetic gap therebetween. The rotor includes a rotor core having a plurality of main pole portions and interpole portions, main pole windings wound around the main pole portions, interpole windings wound around the interpole portions, and a full-wave rectifier circuit for energizing the field current to the main pole windings. The interpole windings produce the induced current by a magnetic flux generated by a time harmonic current superimposed on a fundamental wave of the stator coil. The electromagnetic gaps between the interpole portions and a circumferential surface of the stator are configured larger than electromagnetic between the main pole portions and the circumferential surface of the stator.
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