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公开(公告)号：US12101014B2
公开(公告)日：2024-09-24
申请号：US17771092
申请日：2020-12-10
IPC分类号： H02K5/22
CPC分类号： H02K5/225 , H02K2203/03
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：US12095329B2
公开(公告)日：2024-09-17
申请号：US17669494
申请日：2022-02-11
发明人： Mai Shimizu , Takashi Matsushita
IPC分类号： H02K3/34 , H02K3/30 , H02K3/52 , H02K15/095 , H02K21/14
CPC分类号： H02K3/522 , H02K3/34 , H02K15/095 , H02K21/14
摘要： There is provided a motor armature winding structure that includes a filleted portion including a curved surface, the filleted portion is formed on at least one of corner portions at four corners of a bobbin side wall surface where a wire is wound, and the curved surface has a curvature radius that decreases from a winding start position toward a winding end position in a first layer of the wires wound on the bobbin side wall surface.
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公开(公告)号：US20240305228A1
公开(公告)日：2024-09-12
申请号：US18437764
申请日：2024-02-09
发明人： Yuji IDE , Michio KITAHARA , Shunichi MIYAZAKI , Yoshiyuki USUI
CPC分类号： H02P21/0089 , H02M7/4803 , H02P21/30 , H02P27/08
摘要： A motor control apparatus includes: a smoothing capacitor; an inverter circuit; a torque limiter; and a field-weakening control device. The smoothing capacitor smooths the direct current power. The inverter circuit converts the smoothed direct current power to alternating current power. The torque limiter limits motor torque based on a torque limit value calculated from a direct current voltage applied to the smoothing capacitor, limiting the motor torque in a power running direction to a first torque value when the direct current voltage drops to a first threshold. The field-weakening control device weakens a field and raises an induced motor voltage and the direct current voltage when the power running direction motor torque is limited to the first value. The torque limiter limits the power running direction motor torque to a second value greater than the first value when the direct current voltage rises from the first to a second threshold.
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公开(公告)号：US12062913B2
公开(公告)日：2024-08-13
申请号：US17874840
申请日：2022-07-27
IPC分类号： H02J3/00 , G01R19/165 , G01R19/22 , G01R19/252
CPC分类号： H02J3/0012 , G01R19/16547 , G01R19/16571 , G01R19/22 , G01R19/252
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：US11979077B2
公开(公告)日：2024-05-07
申请号：US17554567
申请日：2021-12-17
发明人： Yasushi Yoda , Kouji Nakatake , Syogo Yoda
CPC分类号： H02K5/225 , H02K1/146 , H02K1/148 , H02K3/18 , H02K3/28 , H02K3/325 , H02K3/522 , H02K2203/06
摘要： Provided is a motor stator which includes: a ring-shaped stator core; a plurality of tooth portions protruding inward from the stator core; an insulator made of an insulating material and mounted on the plurality of tooth portions; a stator coil wound around each of the plurality of tooth portions via the insulator; a lead wire; and a connection portion connecting the stator coil and the lead wire, in which the insulator includes a connection housing portion housing the connection portion.
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公开(公告)号：US20240063671A1
公开(公告)日：2024-02-22
申请号：US18450895
申请日：2023-08-16
发明人： Manabu HORIUCHI
IPC分类号： H02K1/276
摘要： Provided is a rotor of an interior permanent magnet synchronous motor, including a plurality of poles, in which: each of the plurality of poles includes a main magnet; between the adjacent poles, an auxiliary magnet is provided at an end of the main magnet; and letting a d axis be a center of a rotor magnetic pole formed by the main magnet, and letting a q axis be between magnetic poles of the rotor magnetic poles, an angle formed by a magnetization direction of the auxiliary magnet and the q axis ranges from −45° to +45°.
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公开(公告)号：US11828297B2
公开(公告)日：2023-11-28
申请号：US17844375
申请日：2022-06-20
CPC分类号： F04D29/545 , F04D19/002 , F04D29/544 , F04D29/644
摘要： Provided is an axial fan including: a rotor blade having a rotation axis along an air-blowing direction; and a casing, wherein the casing includes: an outer frame portion housing the rotor blade; a cylindrical base portion located on the rotation axis; and a fixed blade provided between an inner peripheral surface of the outer frame portion and an outer peripheral surface of the base portion and downstream of the rotor blade in the air-blowing direction, the fixed blade includes a wind receiving surface, and the wind receiving surface in a first cross section, along the air-blowing direction, of the fixed blade has a smaller blade curvature than the wind receiving surface in a second cross section of the fixed blade along a cutting plane line at a position moved in a rotation direction of the rotor blade from a cutting plane line of the first cross section.
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公开(公告)号：US11784520B2
公开(公告)日：2023-10-10
申请号：US17478200
申请日：2021-09-17
发明人： Manabu Horiuchi , Keisuke Nagata
CPC分类号： H02K1/2766 , H02K29/03 , H02K2201/06 , H02K2201/09
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：US11764660B2
公开(公告)日：2023-09-19
申请号：US17837080
申请日：2022-06-10
发明人： Satoshi Inaba , Yuki Onda , Yasushi Misawa
IPC分类号： H02K41/03 , H02K11/22 , H02K41/035
CPC分类号： H02K41/0356 , H02K11/22 , H02K2211/03
摘要： A linear head module includes: a plurality of linear motors each including a mover having an output shaft portion; a plurality of detection portions each configured to detect a position of the respective output shaft portion in a direction of a thrust axis; a single circuit board provided with the plurality of detection portions; and a detected portion provided to the respective mover, the detected portion is fixed to the mover via a mounting base, and as viewed in the direction of the thrust axis, a direction in which the mounting base extends from the output shaft portion is different from a direction in which the output shaft portion and the circuit board face each other.
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公开(公告)号：US20230179071A1
公开(公告)日：2023-06-08
申请号：US17991224
申请日：2022-11-21
摘要： Provided is a rotor of an interior permanent magnet synchronous motor, including a plurality of poles, wherein each of the plurality of poles includes a plurality of magnets, and the plurality of magnets is provided in such a manner that a magnetomotive force resulting from each magnet becomes weaker with increasing distance from a magnet center.
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