-
公开(公告)号：US20200041634A1
公开(公告)日：2020-02-06
申请号：US16538495
申请日：2019-08-12
发明人： James P. Steiner
IPC分类号： G01S13/04 , H02P27/04 , G01S13/56 , F04D27/00 , F04D29/66 , G01S13/34 , G01S13/88 , F04D25/08 , F24F11/65 , F24F7/007
摘要： A control device for a ceiling fan may have a motor drive circuit configured to control a rotational speed of a motor of the ceiling fan, an occupancy sensing circuit, and a control circuit configured to adjust the rotational speed of the motor in response to a detected occupancy or vacancy condition. The control circuit may process the signals generated by the occupancy sensing circuit to eliminate the effects of vibrations and/or wobbling of the ceiling fan. The control circuit may control the motor drive circuit to adjust the rotational speed of the motor in response to an accelerometer to minimize the magnitude of the wobble of the ceiling fan. The control circuit may be configured to learn a preferred rotational speed for the motor. The control circuit may also be configured to control the rotational speed of the motor to affect a thermal comfort level of an occupant.
-
52.发明授权公开(公告)号：US10539129B2
公开(公告)日：2020-01-21
申请号：US16309934
申请日：2017-05-10
发明人： Ye Yang , Lin Wang , Min Zhang , Mingting Han , Yanan Sun , Chunlong Sun , Guoqing Wang , Hongliang Gong , Jie Zhang , Wen Xing , Feng Wei , Deshi Zhang , Jinyuan Li , Chenglin Liu , Feifei Wan , Yunlong Chen
摘要： The present invention discloses a method and a system pertaining to the field of oil production engineering. According to the method, the crank complete-cycle operation uses a utility frequency driving mode, and the crank incomplete-cycle pumping operation and the crank incomplete-cycle no-pumping, operation use a variable, frequency driving mode. The system is provided with a utility frequency loop and a variable frequency loop which are provided with a common input terminal and a common output terminal. The common input terminal of the utility frequency loop and the variable frequency loop is connected to a utility frequency power supply circuit, and the output terminal is connected to a driving electric machine of the oil pumping unit. A frequency changer is configured in the variable frequency loop. An operation control unit is further configured outside the utility frequency loop and the variable frequency loop.
-
公开(公告)号：US20200007065A1
公开(公告)日：2020-01-02
申请号：US16454478
申请日：2019-06-27
摘要： A method of modulating a cascaded three-phase VFD, including: obtaining space voltage vectors according to states and output levels of switches of power units in each stage, and dividing the vectors into large vectors, medium vectors, small vectors and zero vectors according to their lengths; arranging the vectors into a vector space, and dividing the vector space into sectors, wherein each sector corresponds to a group of the large vector, the medium vector, the small vector and the zero vector; determining a sector in which a reference voltage vector is located, wherein the reference voltage vector is composed by the group of vectors; calculating action time of the vectors in the group; allocating an action order to the vectors; and generating a three-phase modulated wave signal based on the action orders and the action time.
-
公开(公告)号：US20200006939A1
公开(公告)日：2020-01-02
申请号：US16124912
申请日：2018-09-07
发明人： Ching-Chuan LAN
IPC分类号： H02J3/01 , H02M1/12 , H02K11/028 , H02J1/02 , H02M1/084 , H02P27/04 , H02J3/38 , H03H7/09 , H03H7/01
摘要： The electric motor system of the present invention includes an electric motor and a driving device. The electric motor includes a grounded housing, and multi-phase stator windings and a neutral point, which are disposed in the housing and form a star connection. The driving device is connected with the multi-phase stator windings and includes a rectifying circuit, a voltage stabilizing capacitor and a high-frequency driving circuit. The voltage stabilizing capacitor is connected with an output end of the rectifying circuit to provide a direct-current power source to a direct-current power source circuit. The high-frequency driving circuit is connected with the direct-current power source circuit and the multi-phase stator windings, and generates multi-phase driving signals to drive the multi-phase stator windings. A high-frequency harmonic suppressing device is connected with the neutral point and the direct-current power source circuit.
-
公开(公告)号：US20200003048A1
公开(公告)日：2020-01-02
申请号：US16531329
申请日：2019-08-05
发明人： Jacques Orban
摘要： A method for reducing noise at a wellsite includes transmitting a plurality of first signals from a variable frequency drive (VFD) to an alternating current (AC) induction motor. A timing of a plurality of second signals is varied to control transistors in an inverter of the VFD, thereby reducing harmonic distortion of the first signals output from the VFD. The timing is varied based at least partially upon an estimation of the harmonic distortion.
-
公开(公告)号：US20190319570A1
公开(公告)日：2019-10-17
申请号：US16293987
申请日：2019-03-06
申请人： Stryker Corporation
摘要： A brushless DC motor system includes a brushless DC motor having phases and a controller in communication with the motor for operating the motor in accordance with a commutation table. The controller further has nodes. The system further includes phase wires electrically coupling the motor and the controller at the nodes to form wire-to-node connections for establishing electrical communication paths between the motor and controller along each phase wire. Each phase wire corresponds to one phase of the motor. The controller is programmed to, in response to a user-selected configuration of the wire-to-node connections, generate the commutation table.
-
公开(公告)号：US10432115B2
公开(公告)日：2019-10-01
申请号：US15393912
申请日：2016-12-29
IPC分类号： H02P27/04 , H02P6/18 , H02M7/48 , H02P6/10 , H02P6/16 , B62M6/50 , B62M6/75 , B62M6/90 , H02P27/08 , B62M6/45 , G01R23/00 , H02P6/15 , B60L50/20
摘要： A motor driving control apparatus in embodiments includes: a first signal generator to generate a first signal representing any one rotation angle section of plural rotation angle sections according to a sensor signal that changes every predetermined rotation angle of a rotor; a measurement unit to measure a period of each of the rotation angle sections; a prediction unit to predict a period of a next rotation section based on one or plural measured rotation angle sections; a second signal generator to generate a second signal representing a relative rotation angle of the rotor in the next rotation angle section for each period obtained by dividing the predicted period by a predetermined number; and a third signal generator to generate a third signal corresponding to a rotation angle of the rotor based on the first and second signals.
-
公开(公告)号：US10400722B2
公开(公告)日：2019-09-03
申请号：US15855374
申请日：2017-12-27
申请人： CUMMINS INC.
摘要： A method includes receiving a plurality of injection pulses; generating a plurality of drive signals in response to the plurality of injection pulses; generating an interrupt signal in response to the plurality injection pulses, the interrupt signal being one of a high interrupt signal and a low interrupt signal; and transitioning between a plurality of operating states in response to the interrupt signal.
-
公开(公告)号：US10396682B2
公开(公告)日：2019-08-27
申请号：US16087527
申请日：2017-03-24
发明人： Stefan Götz , Malte Jaensch , Dirk Lappe
IPC分类号： H02P27/04 , H02M7/487 , B60L1/00 , B60L7/14 , B60L15/00 , H02M7/49 , B60L58/21 , B60L58/20 , H02M7/483
摘要： A method for operating an electrical network comprising a first subnetwork and a second subnetwork that are connected to one another via a transformer and are DC isolated from one another by said transformer, wherein a primary side of the transformer having a first number of turns is assigned to the first subnetwork and a secondary side of the transformer having a second number of turns is assigned to the second subnetwork, wherein the first subnetwork has a multilevel converter having a plurality of single modules, wherein each single module has an electrical energy store, wherein the multilevel converter provides at least one first incoming AC voltage that is modulated with at least one second incoming AC voltage, wherein a voltage resulting therefrom is provided to the transformer and is transformed by the transformer to an outgoing voltage that is provided to the second subnetwork.
-
公开(公告)号：US20190222157A1
公开(公告)日：2019-07-18
申请号：US16246743
申请日：2019-01-14
申请人： John D. Norwood , Doanh Ba Ho , Adam G. Olson
发明人： John D. Norwood , Doanh Ba Ho , Adam G. Olson
摘要： Embodiments of a mixing device power system generally include a power control module, an AC motor, and a variable frequency drive, wherein upon application of AC power to the system, electrical power is provided to the power control module which transmits electrical power to the AC motor, whereby rotation of a mixing spindle is initiated. After the spindle has begun rotating, transmission of electrical power from the power control module to the AC motor is ceased, and substantially simultaneously electrical power transmission is commenced from the power control module to the variable frequency drive which transmits electrical power to the AC motor, whereby rotation of the mixing spindle is continued. A method of using the mixing device power system to mix a fluid sample is also provided.
-
-
-
-
-
-
-
-
-
搜索结果
1725 条记录 (耗时 0.027 秒)
