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公开(公告)号：US12126296B2
公开(公告)日：2024-10-22
申请号：US17958773
申请日：2022-10-03
发明人： Takashi Kataoka
CPC分类号： H02P3/22 , G08B21/185
摘要： A motor control apparatus includes: a motor; an inverter circuit configured to drive the motor; a first wiring connecting the motor and the inverter circuit; a second wiring connecting the motor and the inverter circuit; a first sensor configured to detect a first current flowing through the first wiring; a second sensor configured to detect a second current flowing through the second wiring; and a dynamic braking circuit, and the dynamic braking circuit is connected between the first sensor and the motor and between the second sensor and the inverter circuit.
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公开(公告)号：US12071953B2
公开(公告)日：2024-08-27
申请号：US17896708
申请日：2022-08-26
IPC分类号： F04D25/06 , F04D19/00 , F04D29/02 , F04D29/056
CPC分类号： F04D19/007 , F04D19/002 , F04D25/06 , F04D29/023 , F04D29/056
摘要： Provided is an axial fan including a pair of fan units, wherein each of the pair of fan units includes a rotor, a motor, and a housing, the rotor includes an impeller cup configured to rotate about a rotation axis, and a fan extending radially from the impeller cup, the motor is provided inside the impeller cup, the housing includes a housing portion housing the rotor, and a base portion supporting the motor, a connection portion is provided to an axial end surface of the base portion and on an inner peripheral side relative to the impeller cup, and the pair of fan units is connected to each other via the connection portions in a direction of the rotation axis.
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公开(公告)号：US20240026898A1
公开(公告)日：2024-01-25
申请号：US18344466
申请日：2023-06-29
发明人： Yoshihisa YAMAZAKI
CPC分类号： F04D29/386 , F04D19/002
摘要： Provided is an axial fan including multiple forward-swept blades. An angle of advance of a trailing edge of the forward-swept blade is larger than an angle of advance of a leading edge of the forward-swept blade. An outer portion of the trailing edge, being positioned further in an outer periphery of the trailing edge than an intermediate portion of the trailing edge with respect to a rotary shaft of the axial fan, advances as the trailing edge advances radially outward of a ventilation channel of the axial fan.
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公开(公告)号：US11808271B2
公开(公告)日：2023-11-07
申请号：US17879491
申请日：2022-08-02
发明人： Yoshihisa Yamazaki
CPC分类号： F04D19/002 , F04D29/522
摘要： Provided is an axial fan including: a rotor blade; a base portion placed on a rotation axis of the rotor blade and on a downstream side in an air-blowing direction of the rotor blade; and an outer frame portion where the rotor blade and the base portion are housed, wherein the base portion includes an inclined portion in an end portion, on the downstream side in the air-blowing direction, of the base portion, the inclined portion reducing in diameter toward the downstream side in the air-blowing direction, the inclined portion includes opening portions and hollow ribs, the opening portions are placed at predetermined intervals in a peripheral direction of the inclined portion, and each of the hollow ribs surrounds a peripheral part on an outer side of each of the opening portions, sticking out from the inclined portion toward the downstream side in the air-blowing direction along the rotation axis.
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公开(公告)号：US20230060338A1
公开(公告)日：2023-03-02
申请号：US17874840
申请日：2022-07-27
IPC分类号： H02J3/00 , G01R19/165
摘要： An input power monitoring circuit includes a rectifier circuit, a divided voltage generator circuit, a divided voltage comparator circuit, a switching circuit, and a computing device. The divided voltage comparator circuit is configured in such a manner that polarity of an output signal that is outputted from a first comparator upon a first rectified divided voltage exceeding a first comparison voltage is opposite to polarity of an output signal that is outputted from a second comparator upon a second rectified divided voltage exceeding a second comparison voltage. Output terminals of the first and second comparators are connected to each other. A connection point between the output terminals of the first and second comparators is connected to an input terminal of the switching circuit. The computing device measures frequency of a pulse signal outputted from the switching circuit, and determines the voltage state of input power based on the measured frequency.
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公开(公告)号：US20220399792A1
公开(公告)日：2022-12-15
申请号：US17740469
申请日：2022-05-10
发明人： Satoshi INABA , Yuki ONDA , Yasushi MISAWA
摘要： A linear head module includes a plurality of linear units each having an output member, and a housing. The linear unit has a mover and a stator. The stator has an output-side bearing holder and a counter-output-side bearing holder. The housing has: a main body portion integrally including an output-side surface portion, a counter-output-side surface portion, and a coupling portion that couples the output-side surface portion and the counter-output-side surface portion; a flange facing the output-side surface portion; and a bracket facing the counter-output-side surface portion.
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公开(公告)号：US20220368191A1
公开(公告)日：2022-11-17
申请号：US17771092
申请日：2020-12-10
IPC分类号： H02K5/22
摘要： A stator sub-assembly with a connector includes a stator sub-assembly including a stator core and a rigid wiring board, and a connector fixed to a connector mounting part of the rigid wiring board in such a way that it is opposed to the stator core in the radial direction of the frame. A groove part that extends in the axial direction from an opening in the axial direction and accommodates the connector and the connector mounting part is formed in an inner peripheral surface of the frame. A window part for an opponent connector to mate with the connector accommodated in the groove part is formed in the frame. The window part opens in an outer surface of the frame and an inner surface of the groove part, and has an unbroken inner peripheral surface.
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公开(公告)号：US11489392B2
公开(公告)日：2022-11-01
申请号：US16719018
申请日：2019-12-18
摘要： A bobbin structure of an armature of a three-phase motor having 6N (N is a natural number) slots and 3N coils per phase, the bobbin structure including: a main pole into which a winding bobbin around which a coil is wound is inserted; and an auxiliary pole into which an empty bobbin around which the coil is not wound is inserted. The main pole and the auxiliary pole are placed in a circumferential direction with respect to a rotation axis, and a contact portion where the empty bobbin and the winding bobbin are in contact with each other is formed on each of an outer peripheral side and an inner peripheral side of the slot formed between the main pole and the auxiliary pole.
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公开(公告)号：US20220103034A1
公开(公告)日：2022-03-31
申请号：US17478200
申请日：2021-09-17
发明人： Manabu HORIUCHI , Keisuke NAGATA
摘要： A rotor structure of a synchronous motor includes: a stator; and a rotatable rotor on the inner side of the stator, in which the rotor includes: a rotor core fixed to a rotary shaft; and a permanent magnet on the outer side of the rotor core, the permanent magnet on the outer side of the rotor core includes a main magnet and an auxiliary magnet, the auxiliary magnet is provided in contact with the outer side of the rotor core, and the main magnet is provided in contact with the outer side of the auxiliary magnet.
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公开(公告)号：US11041498B2
公开(公告)日：2021-06-22
申请号：US16296341
申请日：2019-03-08
摘要： A fan motor apparatus is provided, which includes a blade; a rotary shaft; a hub; a rotor integrally molded with the blade, the rotor being fixed to the rotary shaft; and a protection cover including: a lid portion covering a top surface of the rotor; and an intake port configured to take air into the lid portion.
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