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公开(公告)号：US11623335B2
公开(公告)日：2023-04-11
申请号：US16180922
申请日：2018-11-05
发明人： Wai Man Wong , Chiu Keung Loong
摘要： A control assembly for use in controlling a speed of operation of an electric device, the control assembly including: a control assembly housing; a magnetic sensor; a magnetic element; an actuator that is configured for movement relative to the control assembly housing wherein responsive to said movement of the actuator relative to the control assembly housing, the magnetic sensor and magnetic element move relative to each other between at least one of a first position and a second position such that the magnetic sensor senses a first magnetic field reading when in the first position and senses a second magnetic field reading when in the second position; and, a control module operably connected to the magnetic sensor and configured for controlling the electric device to operate in at least one of a first speed and a second speed by reference to an output of the magnetic sensor indicative of the sensed first magnetic field reading and the second magnetic field reading respectively.
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公开(公告)号：US20230090353A1
公开(公告)日：2023-03-23
申请号：US17943897
申请日：2022-09-13
发明人： Elio Marioni
摘要： A method for controlling the direction of rotation of a fluid machine having an oriented-blade impeller, comprising the following steps:
starting (100) a synchronous electric motor which operates said fluid machine until the synchronous state is reached;
driving (200) said synchronous electric motor at steady state by applying a phase cutting;
applying (300) a phase cutting corresponding to a reference power, wherein said reference power is comprised between a first power required to keep the propeller rotating in a right direction and a second power required to keep the propeller rotating in a wrong direction, which is opposed to the right direction.-
53.发明授权公开(公告)号：US11611299B2
公开(公告)日：2023-03-21
申请号：US16710509
申请日：2019-12-11
摘要： A method for determining a direction of rotation for an electronically commutated motor (ECM) is described. The motor is configured to rotate a blower and the method comprises rotating the blower using the ECM and determining if the resulting blower rotation is indicative of the desired direction of rotation for the blower.
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公开(公告)号：US11539314B2
公开(公告)日：2022-12-27
申请号：US16462675
申请日：2017-11-22
申请人： MAKITA CORPORATION
发明人： Takeshi Nishimiya , Hidekazu Suda
IPC分类号： H02P6/16 , H02P6/12 , H02P6/24 , B23D45/16 , B23D47/12 , B23D59/00 , B23Q11/00 , B27G19/04 , H02P6/30
摘要： An electric working machine in one aspect of the present disclosure includes: a motor; a driver to drive the motor; a first control circuit; and a second control circuit. The first control circuit controls the driver such that the motor rotates in a set rotation direction. The second control circuit is provided separately from the first control circuit. The second control circuit detects a rotation direction of the motor and performs an abnormality handling process to stop rotation of the motor in response to a situation where the detected rotation direction is reverse to the set rotation direction.
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公开(公告)号：US20220239240A1
公开(公告)日：2022-07-28
申请号：US17617580
申请日：2020-06-09
发明人： Marco Bohlländer
摘要： An arrangement for detecting a direction of rotation of a multi-phase electric motor includes a plurality of single-phase converters. Each single-phase converter of the plurality of single-phase converters supplies one phase of the multi-phase electric motor with current. The arrangement also includes two sensor units that are configured to determine actual values of the phase currents of the multi-phase electric motor and to transmit the actual values to the plurality of single-phase converters. The arrangement also includes a monitoring and control unit in each converter of the plurality of single-phase converters. The monitoring and control unit is configured and programmed to determine the direction of rotation and a speed of rotation of the multi-phase electric motor from the actual values.
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公开(公告)号：US11159109B2
公开(公告)日：2021-10-26
申请号：US15837955
申请日：2017-12-11
发明人： Akihiro Iino
IPC分类号： H02K33/00 , H02K7/075 , H02P6/17 , H02P7/03 , H02P25/032 , H02K7/06 , H02P3/12 , H02P1/02 , H02P3/10 , H02P6/30
摘要： A vibration generation device includes a stator, and a rotor rotatable around a predetermined axis with respect to the stator and having a weight having a gravity center at a position shifted from the predetermined axis. A control section controls a start-up period maximum voltage value, which is a maximum voltage value of a drive signal to be applied to the vibration generation device in a start-up period, to become larger than a steady operation period voltage value, which is a voltage value of the drive signal to be applied to the vibration generation device in a steady operation period. The control section selects at least one of a pluraity of voltage values as the steady operation period voltage value and sets the duration of the start-up period based on the steady operation period voltage value selected.
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公开(公告)号：US11085227B2
公开(公告)日：2021-08-10
申请号：US15580786
申请日：2016-05-26
申请人： Mitsuba Corporation
IPC分类号： H02P3/12 , H02P6/30 , B60J5/06 , E05F15/79 , E05F15/643 , E05F15/655 , E05F15/689 , E05F15/646 , E05F15/659 , E05D15/06 , H02P29/024 , E05D15/10 , E05F15/76
摘要： A vehicle opening and closing apparatus that opens and closes an opening and closing body provided on a vehicle includes: an electric motor that drives the opening and closing body; a position detection part that detects a position of the opening and closing body; a measurement part that measures a current value which flows in the electric motor when the opening and closing body arrives at a predetermined position; a counter that counts up a count value based on the current value; and a determination part that stops, for a predetermined period of time, the next and subsequent opening and closing operation of the opening and closing body when the count value exceeds a first threshold value.
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公开(公告)号：US20210159824A1
公开(公告)日：2021-05-27
申请号：US17088667
申请日：2020-11-04
申请人： FANUC CORPORATION
发明人： Takashi OKAMOTO , Yuuki MORITA
摘要： A pole direction detection device for detecting a pole direction of a synchronous motor having saliency comprises a high-frequency voltage application unit that applies a high-frequency voltage to the motor; an excitation phase change unit that changes an excitation phase of the motor to an arbitrary phase; a driving current detection unit that detects a driving current value of the motor; a pole direction estimation unit that detects a pole direction based on the excitation phase and the driving current value; a measurement unit that measures an inductance value of the motor; and a control unit that changes a frequency of the high-frequency voltage to be applied by the high-frequency voltage application unit based on the inductance value measured by the measurement unit.
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公开(公告)号：US10987704B2
公开(公告)日：2021-04-27
申请号：US15574792
申请日：2016-05-20
摘要： An electric fan with a self-cleaning mode to energise rotating fan blades in alternate forward and reverse directions to create a vibration in order to shake built-up dust or dirt particles from the blades in a frequency at which the rotational direction is alternated set to a known or detected resonant frequency of the blades thereby excite resonant modes and maximise the amplitude of vibrations. The self-cleaning operation may be triggered by detection of excessive/abnormal loading on the motor. The fan may be operated in a vibration detecting mode over a range of rotational speeds to locate speeds that produce resonance, or to detect a fault with the fan. Motor reversal frequencies corresponding to resonance-inducing speeds may be used in the self-cleaning mode. The vibration detecting mode may be carried out while the at least one blade is rotated in a direction opposite to its normal operational rotational direction.
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公开(公告)号：US20210050767A1
公开(公告)日：2021-02-18
申请号：US16594195
申请日：2019-10-07
申请人： Po-Hsun Yen , Shang-Jung Lee , Yung-Cheng Chang , Sung-Liang Hou
发明人： Po-Hsun Yen , Shang-Jung Lee , Yung-Cheng Chang , Sung-Liang Hou
摘要： A motor comprising a stator and a rotor; the stator includes a first stator, a second stator, and a third stator; the stators each include at least one stator coil; the rotor includes a magnetic element, a first bearing, a second bearing, and a shaft; the stators generating a superimposed magnetic field together causes the magnetic element to rotate; when the magnetic element rotates in the first plane, the outer ring of the first bearing rotates; the center of the first bearing is located in a plane where the second bearing is located, and when the magnetic element rotates in the second plane, the inner ring of the second bearing rotates; the central axis of the shaft passes through the center of the first bearing; wherein the shaft is rotatably fixed to the first bearing and connected to the second bearing; the magnetic element located in where the central axis of the first bearing meets the central axis of the second bearing, the normal vector of the first plane is parallel to the axial direction of the shaft; the normal vector of the second plane is perpendicular to the axial direction of the shaft.
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