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公开(公告)号：US11223311B2
公开(公告)日：2022-01-11
申请号：US16598753
申请日：2019-10-10
Applicant: DENSO CORPORATION
Inventor： Hirofumi Kinjo , Toru Wakimoto , Makoto Taniguchi , Keiji Kondo , Jun Ishida , Tomoya Takahashi
Abstract: In a rotary electric machine, a rotor, and a stator. The stator includes slots provided in a circumferential direction thereof, and stator windings wound in the slots. The stator windings include n groups of three-phase windings, where n is a power of 2. The slots include first slots each accommodating portions of same-group and same-phase windings in the n groups of three-phase windings. The energizing directions of the same-group and same-phase windings are identical to each other. The second slots each accommodate different-group and same-phase windings in the n groups of three-phase windings. The first slots and the second slots are arranged in the stator at predetermined intervals in a circumferential direction of the stator, and the three-phase windings of each group are wound around the stator with regular intervals therebetween.
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公开(公告)号：US11196372B2
公开(公告)日：2021-12-07
申请号：US15931919
申请日：2020-05-14
Applicant: DENSO CORPORATION
Inventor： Hirofumi Kinjo , Makoto Taniguchi
Abstract: A control apparatus for a rotating electric machine is applied to a rotating electric machine system. The rotating electric machine system includes a rotating electric machine having a multiple-phase winding, a first inverter connected to a first end of the winding for each phase, a second inverter connected to a second end of the winding for each phase, a high-potential-side connection line, and a low-potential-side connection line. The control apparatus acquires a parameter that has a correlation with a fundamental current that flows to the winding of each phase. The control apparatus stores, in a storage unit, correspondence information in which the parameter is associated with an amplitude and a phase of a harmonic voltage that is generated in the rotating electric machine. The control apparatus controls each of the first inverter and the second inverter to suppress the harmonic voltage based on the correspondence information and the acquired parameter.
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公开(公告)号：US11973448B2
公开(公告)日：2024-04-30
申请号：US17212655
申请日：2021-03-25
Applicant: DENSO CORPORATION
Inventor： Hirofumi Kinjo , Takashi Kashiwazaki , Makoto Taniguchi
IPC: H02M7/493 , H02M1/08 , H02M7/5387 , H02P27/08
CPC classification number: H02P27/08 , H02M1/08 , H02M7/53871
Abstract: A drive device for a rotary electric machine includes a first inverter that has high-potential side and low-potential side switching elements corresponding to phases of the rotary electric machine and is connected to a DC power supply, a second inverter that has high-potential side and low-potential side switching elements corresponding to the phases and is connected to the first inverter via a connection line, and a controller that controls the first and second inverters so that if a percentage modulation expressed by a fundamental wave component amplitude of a phase winding voltage and a DC voltage is a threshold value or more, percentage modulations of output phase voltages of the first and second inverters are more than 1, and so that a phase difference between a phase of the output phase voltage of the first inverter section and that of the second inverter section changes depending on the percentage modulation.
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Patent Agency Ranking
4.发明授权公开(公告)号：US09621046B2
公开(公告)日：2017-04-11
申请号：US13743745
申请日：2013-01-17
Applicant: DENSO CORPORATION
Inventor： Hirofumi Kinjo , Keiji Shigeoka , Yuji Hayashi , Kimikazu Nakamura
CPC classification number: H02M3/24 , B60R16/03 , H02M3/33507 , H02M3/3376
Abstract: In a power converter, a reference signal generator generates a reference signal with a predetermined period. A current detector detects a current flowing in the converter. When a value of the detected current is larger than a value of a predetermined current command, a reset signal generator generates a reset signal. A driving unit drives a switch. The switch is turned on, and subsequently is turned off: (i) in synchronization with the reference signal when the reset signal is not outputted before the reference signal is outputted; and (ii) in synchronization with the reset signal when the reset signal is outputted before the reference signal is outputted. However, the switch is turned off in synchronization with the reset signal during a predetermined time including a first predetermined time before an output timing of the reference signal and a second predetermined time after the output timing of the reference signal.
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公开(公告)号：US11196315B2
公开(公告)日：2021-12-07
申请号：US16989641
申请日：2020-08-10
Applicant: DENSO CORPORATION
Inventor： Hirofumi Kinjo , Makoto Taniguchi
Abstract: A drive apparatus is provided for driving a rotating electric machine having first and second multi-phase coils. The drive apparatus includes first and second inverters, first and second shift switches, and first and second energization controllers. The first energization controller is configured to turn on and off, for each of phase windings of the first and second multi-phase coils, one corresponding pair of upper-arm and lower-arm switches of the first and second inverters while keeping the first and second shift switches in an OFF state. The second energization controller is configured to turn on and off, for each corresponding pair of the phase windings of the first and second multi-phase coils, one corresponding upper-arm switch of the first inverter and one corresponding lower-arm switch of the second inverter respectively for first energization periods and second energization periods that are alternately set while keeping the shift switches in an ON state.
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公开(公告)号：US11489474B2
公开(公告)日：2022-11-01
申请号：US17306197
申请日：2021-05-03
Applicant: DENSO CORPORATION
Inventor： Hirofumi Kinjo , Makoto Taniguchi
Abstract: In a driving device for a rotating electric machine, a first inverter unit blocks and allows, for each winding of multi-phase windings of the rotating electric machine, current conduction on one side of the winding and a second inverter unit blocks and allows current conduction on the other side of the winding. A plurality of second switching elements forming the second inverter unit each have a lower ON resistance than a plurality of first switching elements forming the first inverter unit. A controller is configured to switch on and off the respective first switching elements at a switching frequency higher than an electric fundamental frequency and switch on and off the respective second switching elements at a switching frequency lower than the switching frequency at which to switch on and off the first switching elements.
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公开(公告)号：US11323009B2
公开(公告)日：2022-05-03
申请号：US16369671
申请日：2019-03-29
Applicant: DENSO CORPORATION
Inventor： Ryotaro Okamoto , Hirofumi Kinjo , Makoto Taniguchi
Abstract: A rotating electric machine unit includes a rotating electric machine, a high heat generation circuit and a low heat generation circuit both of which are electrically connected with the rotating electric machine, a first cooler, a first-coolant supplier, a second cooler and a second-coolant supplier. The first cooler is configured to cool both the high heat generation circuit and the low heat generation circuit with a first coolant. The first-coolant supplier is configured to supply the first coolant to the first cooler. The second cooler is configured to cool the rotating electric machine with a second coolant. The second-coolant supplier is configured to supply the second coolant to the second cooler. The second-coolant supplier is formed integrally with a low heat generation circuit-cooling part of the first cooler. The second-coolant supplier includes a heat exchanger via which heat is exchanged between the first coolant and the second coolant.
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公开(公告)号：US11228270B2
公开(公告)日：2022-01-18
申请号：US16985551
申请日：2020-08-05
Applicant: DENSO CORPORATION
Inventor： Hirofumi Kinjo , Yuji Ito , Makoto Taniguchi
Abstract: A drive apparatus is provided for driving a multi-phase rotating electric machine. The rotating electric machine includes a plurality of winding groups for respective phases. The drive apparatus includes a first inverter connected with start terminals of the winding groups of the rotating electric machine, a second inverter connected with intermediate terminals of the winding groups, and an energization controller configured to selectively perform energization of the winding groups by the first inverter and energization of the winding groups by the second inverter. Each of the first and second inverters includes a plurality of switch pairs respectively corresponding to the winding groups and each consisting of an upper-arm switch and a lower-arm switch that are connected in series with each other. Moreover, each of the upper-arm and lower-arm switches of the first inverter is configured to have bidirectionally-conducting and bidirectionally-blocking functions.
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