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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：US11874339B2
公开(公告)日：2024-01-16
申请号：US17337957
申请日：2021-06-03
Applicant: DENSO CORPORATION
Inventor： Ryota Kubokawa , Masakazu Kouda , Toru Wakimoto , Yusuke Shindo , Akira Sumi
Abstract: In an insulation resistance detection apparatus, a voltage determiner determines whether a detection voltage, which has changed by at least a preset value, becomes stable at around a changed voltage value. A resistance determiner determines a value of an insulation resistance between a ground portion and a power-supply path based on a currently sampled value of the detection voltage instead of a moving average in response to determination that the detection voltage, which has changed by at least the preset value, becomes stable at around the changed voltage value.
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公开(公告)号：US12078685B2
公开(公告)日：2024-09-03
申请号：US17509155
申请日：2021-10-25
Applicant: DENSO CORPORATION
Inventor： Tomomichi Mizoguchi , Toru Wakimoto
CPC classification number: G01R31/52 , H01M10/48 , H02J7/0063 , H02J7/00712
Abstract: An electrical leakage determination device includes: a capacitor connected to a battery; a detection resistor connected to the capacitor; a detection unit detecting a voltage value at a connection point between the detection resistor and the capacitor; a low amplitude voltage application unit applying a low amplitude voltage to the detection resistor every driving cycle; a high amplitude voltage application unit applying, before the application of the low amplitude voltage to the detection resistor, a high amplitude voltage to the detection resistor. The device determines whether there is electrical leakage between the power supply circuit and the ground based on a peak value of the voltage value detected when the low amplitude voltage is being applied, and changes a time integral value of the high amplitude voltage applied to the detection resistor based on a change in the voltage value detected when the low amplitude voltage is being applied.
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公开(公告)号：US11921138B2
公开(公告)日：2024-03-05
申请号：US17340906
申请日：2021-06-07
Applicant: DENSO CORPORATION
Inventor： Masakazu Kouda , Ryota Kubokawa , Yusuke Shindo , Toru Wakimoto
CPC classification number: G01R27/025 , B60L3/0046 , G01R27/18 , G01R31/52
Abstract: An insulation resistance detection device detects a voltage at a connection point between a coupling capacitor and a resistance in the case where a frequency signal is outputted to the resistance, and detects an insulation resistance between a ground portion and a power supply path based on a moving average value of a detection voltage. The insulation resistance detection device includes a first determination unit, a resistance detection unit, and a second determination unit. In response to a determination that the pulsation of the detection voltage is attenuated, the resistance detection unit detects the insulation resistance based on, instead of a first moving average value, a second moving average value calculated by using the detection voltage in a second range including a smaller number of detection voltages than in the first range.
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Patent Agency Ranking
公开(公告)号：US11163014B2
公开(公告)日：2021-11-02
申请号：US16591764
申请日：2019-10-03
Applicant: DENSO CORPORATION
Inventor： Toru Wakimoto , Yusuke Shindo , Masakazu Kouda
Abstract: An electrical leakage determination system that determines if an electrical leakage occurs includes a capacitor having first and second ends connected to a cathode side power supply path and a grounding section and a switch disposed in an electrical path formed parallel to the capacitor. When the capacitor discharges and a predetermined period has elapsed after the controller sets an energized state between the cathode-side power supply path and the grounding section by bringing the switch to an energizing position, the controller allows the capacitor to charge by setting an energization shut down state between the cathode-side power supply path and the grounding section by bringing the switch to an energization shut down position. The controller subsequently detects a voltage value of the capacitor and determines if the electrical leakage is either present or absent based on the voltage value.
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公开(公告)号：US10006784B2
公开(公告)日：2018-06-26
申请号：US15061297
申请日：2016-03-04
Applicant: DENSO CORPORATION
Inventor： Takuya Kawamura , Hirofumi Kinjou , Toru Wakimoto , Hideaki Nakayama , Masataka Yoshimura
IPC: G01B7/00 , G01R33/025 , G01D5/14 , G01D3/036
CPC classification number: G01D5/145 , G01D3/0365 , G01D5/24485
Abstract: A correction circuit stores data for obtaining coefficients of a relational expression indicating a relationship between a disturbance magnetic flux and a rotational angle error. Then, the coefficients are obtained from the data for obtaining the coefficients, and a detection result of a magnetic sensor is corrected based on the coefficients obtained, a relational expression, and a detection result of a disturbance magnetic flux detection circuit. Since it is possible to obtain the rotational angle error with respect to the disturbance magnetic flux from the coefficient obtained and the relational expression, it is not necessary to store the data indicating the relationship between the disturbance magnetic flux and the rotational angle error for all of the disturbance magnetic flux value in disturbance magnetic flux regions that may be applied.
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公开(公告)号：US11385297B2
公开(公告)日：2022-07-12
申请号：US16654222
申请日：2019-10-16
Applicant: DENSO CORPORATION
Inventor： Toru Wakimoto , Yusuke Shindo , Masakazu Kouda
Abstract: An electrical leakage determination system determines if an electrical leakage occurs between each of power supply paths and a grounding section. The electrical leakage determination system includes a coupling capacitor with one end connected to an anode-side power supply path, a resistor connected to the other end of the coupling capacitor, and an oscillator connected to the resistor to output an AC voltage to the resistor. A determiner detects a voltage at a connection point located between the coupling capacitor and the resistor when the oscillator outputs an AC voltage to the resistor. The determiner determines if the electrical leakage occurs based on the detected voltage. The oscillator increases an absolute value of an AC voltage output during a preparation period provided prior to a detection timing when a voltage is detected at a connection point greater than an absolute value of an AC voltage output at the detection timing.
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公开(公告)号：US10378922B2
公开(公告)日：2019-08-13
申请号：US15544612
申请日：2016-01-13
Applicant: DENSO CORPORATION
Inventor： Takuya Kawamura , Hirofumi Kinjou , Toru Wakimoto , Hideaki Nakayama , Masataka Yoshimura
Abstract: A rotation angle detection apparatus includes a magnet that is provided to a rotating shaft of a rotating body and rotates with the rotating shaft to generate magnetic flux and a magnetic sensor that is provided at a distance from the magnet and detects a magnetic flux interlinked with the magnetic sensor. The rotation angle detection apparatus has a magnet magnetic flux detection circuit that detects a magnet magnetic flux generated from the magnet, a disturbance magnetic flux detection circuit that detects a disturbance magnetic flux, which is a magnetic flux other than the magnet magnetic flux and is interlinked with the magnetic sensor, and a correction circuit that corrects a result of detection of the magnetic sensor based on a result of detection of the magnet magnetic flux detection circuit and a result of detection of the disturbance magnetic flux detection circuit.
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公开(公告)号：US09136738B2
公开(公告)日：2015-09-15
申请号：US13625098
申请日：2012-09-24
Applicant: DENSO CORPORATION , NIPPON SOKEN, INC.
Inventor： Kazumasa Ikeda , Toru Wakimoto , Yoshimitsu Takahashi
CPC classification number: H02K3/28
Abstract: An electric rotating machine includes a rotor and a stator. The rotor has a plurality of pairs of magnetic poles. The stator includes a stator core and a stator coil that is comprised of a plurality of phase windings wound on the stator core. The stator core has, for each of the phase windings of the stator coil, n circumferentially-consecutive single-phase slots, in which only the phase winding is received, per magnetic pole of the rotor, where n is a natural number not less than 2. Each of the phase windings of the stator coil has first to kth sections that are sequentially arranged from one end to the other end of the phase winding, where k is a natural number not less than 2. The first section is received in different ones of the single-phase slots for the phase winding from the kth section.
Abstract translation: 旋转电机包括转子和定子。 转子具有多对磁极。 定子包括定子芯和定子线圈，定子线圈由缠绕在定子芯上的多个相绕组构成。 对于定子线圈的每个相绕组，定子铁心对转子的每个磁极具有n个沿周向连续的单相槽，其中只有相绕组被接收，其中n是不小于 定子线圈的每个相绕组具有从相绕线的一端到另一端依次布置的第一至第k个部分，其中k是不小于2的自然数。第一部分被接收在不同的 用于从第k部分的相绕组的单相槽中的一个。
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