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公开(公告)号：US20200036266A1
公开(公告)日：2020-01-30
申请号：US16497896
申请日：2018-03-20
发明人： Yutaka UEMATSU , Kazumi SHINKAI , Shun KATO , Shuichi KINJO , Kohei OSUGA , Tadayuki HATSUDA
IPC分类号： H02K11/215 , H02K7/00 , H02K7/116
摘要： An electric actuator includes a motor portion that includes a motor including a motor shaft extending axially, a decelerator that is joined to one axial side of the motor shaft, and an output portion that includes an output shaft to which rotation of the motor shaft is transmitted via the decelerator. The output shaft includes a joint portion joined to a driven shaft, the output portion includes a sensor magnet and a magnet holder which holds the sensor magnet, and the magnet holder is indirectly joined to the output shaft and is fixed to the driven shaft.
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公开(公告)号：US20190199160A1
公开(公告)日：2019-06-27
申请号：US16232087
申请日：2018-12-26
CPC分类号： H02K5/20 , H02K9/005 , H02K11/0094 , H02K11/33 , H02P6/10 , H02P6/16 , H02P29/64 , H02P29/68
摘要： A motor includes: a housing that accommodates a stator that has a field coil and a rotor; an inverter that is provided in the housing; a voltage boosting circuit that has a reactor provided in the housing; and a coolant flow path that is provided at a position at which the coolant flow path overlaps with the inverter and the voltage boosting circuit in the housing in a diameter direction, and the inverter has a control board that controls a drive current or a drive voltage and a drive element that is provided on the side of the housing with respect to the control board and supplies power to the field coil in accordance with control from the control board.
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公开(公告)号：US20190319511A1
公开(公告)日：2019-10-17
申请号：US16382158
申请日：2019-04-11
摘要： There is provided an electric actuator including a motor part, a deceleration mechanism, an output part, and a housing. The housing has a housing main body and a lid member. An output shaft is positioned at a first corner of the housing. The lid member and the housing main body are fastened by bolts. The bolts include corner bolts positioned at respective corners of the housing other than the first corner and an intermediate position bolt positioned at the intermediate between the first corner and a second corner adjacent to the first corner. In a plane view, the intermediate position bolt is positioned on the side of the planar center with respect to an edge connecting the first corner and the second corner and on the side of an outer edge with respect to an imaginary line connecting the center of the output shaft and the second corner.
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公开(公告)号：US20190207473A1
公开(公告)日：2019-07-04
申请号：US16234591
申请日：2018-12-28
发明人： Shun KATO , Yutaka UEMATSU , Tadayuki HATSUDA , Yuzo AKASAKA
CPC分类号： H02K7/116 , F16H63/3466 , G01D5/14 , H02K5/08 , H02K5/1732 , H02K5/225 , H02K7/083 , H02K11/215 , H02K21/14 , H02K2211/03
摘要： An electric actuator includes: a motor part, having a motor shaft that extends in an axial direction and is rotated in both directions; a deceleration mechanism, connected to the motor shaft; a circuit board, electrically connected to the motor part; an output part, having an output shaft to which rotation of the motor shaft is transmitted through the deceleration mechanism; a sensor magnet, attached to the motor shaft; and a motor part sensor, detecting a magnetic field of the sensor magnet and detecting rotation of the motor shaft. The motor part has a rotor magnet that is fixed to the motor shaft. The rotor magnet and the sensor magnet each have multiple magnetic poles in a circumferential direction around the motor shaft. The magnetic poles of the rotor magnet and the magnetic poles of the sensor magnet are disposed to be shifted from each other in the circumferential direction.
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公开(公告)号：US20190199268A1
公开(公告)日：2019-06-27
申请号：US16232090
申请日：2018-12-26
CPC分类号： H02P29/64 , H02P27/08 , H02P2201/11
摘要： A motor control device includes a temperature input unit that inputs a temperature of a motor and a control unit that performs control such that the control unit drives the motor by constant current/variable voltage control by lowering a power source voltage in a case in which the input temperature of the motor is equal to or less than a first threshold value and drives the motor by constant voltage/variable current control at a predetermined power source voltage in a case in which the temperature of the motor exceeds the first threshold value.
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公开(公告)号：US20210099125A1
公开(公告)日：2021-04-01
申请号：US17017708
申请日：2020-09-11
摘要： A motor driving device for driving a motor is provided. The motor driving device includes: a driver outputting a drive signal for driving the motor to the motor; and a controller controlling a duty ratio of the drive signal based on three control parameters which are an initial duty ratio, a duty ratio increasing speed, and a target duty ratio. The controller has a normal control mode in which each of the three control parameters is a predetermined value, and a cryogenic control mode in which at least one of the three control parameters is a smaller value than in the normal control mode.
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公开(公告)号：US20200014284A1
公开(公告)日：2020-01-09
申请号：US16492963
申请日：2018-03-19
发明人： Yutaka UEMATSU , Tadayuki HATSUDA , Kazumi SHINKAI , Shun KATO , Shuichi KINJO , Fumito TAMURA
IPC分类号： H02K11/215 , H02K7/116
摘要： An electric actuator includes a motor that includes a motor shaft extending axially, a decelerator that is joined to one axial side of the motor shaft, an output that includes an output shaft to which rotation of the motor shaft is transmitted via the decelerator, and a control board that is electrically connected to at least the motor. The motor and the output are disposed radially side by side with respect to the motor, the control board extends from a position axially overlapping the motor shaft to a position axially overlapping the output shaft, and the control board includes a motor sensor that detects a rotation angle of the motor shaft, and an output sensor that detects a rotation angle of a driven shaft joined to the output shaft.
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公开(公告)号：US20190199250A1
公开(公告)日：2019-06-27
申请号：US16232089
申请日：2018-12-26
IPC分类号： H02P6/10 , H02M7/5387 , H02M3/158 , H02K11/33 , H02K11/00
CPC分类号： H02P6/10 , H02K11/0094 , H02K11/33 , H02M3/158 , H02M7/53871 , H02P6/16 , H02P2201/09
摘要： A motor control device includes: a voltage boosting circuit that boosts a power source voltage supplied from an outside; a condenser that smooths a voltage output by the voltage boosting circuit; an inverter circuit that generates a drive voltage of a motor by switching a voltage output by the voltage boosting circuit and smoothed by the condenser; and a control part that causes the voltage boosting circuit to bypass and causes the power source voltage to be supplied to the inverter circuit, and a distance between the voltage boosting circuit and the inverter circuit is a distance with which a parasitic inductance is equal to or less than a predetermined value.
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公开(公告)号：US20180283524A1
公开(公告)日：2018-10-04
申请号：US15936530
申请日：2018-03-27
发明人： Yutaka UEMATSU , Kazumi SHINKAI , Shun KATO , Shuichi KINJO , Kohei OSUGA , Tadayuki HATSUDA
IPC分类号： F16H57/027 , H02K5/10 , H02K5/173
CPC分类号： F16H57/027 , H02K5/10 , H02K5/15 , H02K5/1732 , H02K7/116 , H02K2205/09
摘要： There is provided a breather structure of an actuator in which the breather structure is provided in a housing of the actuator, the breather structure including: a recessed groove positioned on an outer surface of the housing; a breathing hole which is positioned on a bottom surface of the recessed groove and passes through the housing in a first direction; a filter fixed to an inside of the housing so that the filter closes an opening of the breathing hole; a lid body which partially covers a region of the recessed groove including the breathing hole from an outside of the housing when viewed from the first direction; a breather opening portion positioned at a portion of the recessed groove exposed from the lid body; and a protrusion portion which protrudes from the bottom surface of the recessed groove to a side of the lid body.
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