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公开(公告)号：US20180323735A1
公开(公告)日：2018-11-08
申请号：US15803235
申请日：2017-11-03
发明人： Ming Leong Kong
摘要： A variable-speed controller for use with an electric device including: a variable resistor element having a variable resistor element contact surface; a membrane including a first membrane contact surface spaced-apart from the variable resistor element contact surface by a spacer element, and, a second membrane contact surface; a slider configured for slidable movement along the second membrane contact surface wherein responsive to the slider slidably moving along the second membrane contact surface, the first membrane contact surface is able to be urged into contact with the variable resistor element contact surface in a plurality of contact point configurations whereby the effective resistance of the variable resistor element is configured to change in response to the first membrane contact surface being urged into contact with the variable resistor element contact surface in each of the plurality of contact point configurations.
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公开(公告)号：US10103668B2
公开(公告)日：2018-10-16
申请号：US15295681
申请日：2016-10-17
发明人： Prakash B. Shahi
IPC分类号： F04B49/20 , H02P23/04 , F04B49/06 , G05B1/00 , H02P29/10 , F04D25/06 , F04D25/08 , F04D27/00 , G05B1/01 , G05B13/02 , H02P6/06
摘要： A system and method of avoiding hunting behavior by a motor around disallowed speed ranges. A sensor or sensorless method determines the motor's actual speed. A memory contains lower and upper speed values that define a disallowed range. A control unit determines whether the motor is operating under a limiting condition and engaged in hunting behavior by determining whether the motor is repeatedly moving between an actual speed that is within the disallowed range and an actual speed that is at or below the lower speed value during a first period, and if so, sets a temporary speed limit for the motor at the lower speed value for a second period. The first period may be the time required for the motor to change its actual speed a few times and thereby confirm hunting behavior. The second period may be sufficiently long that the limiting condition may have changed.
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公开(公告)号：US10101729B2
公开(公告)日：2018-10-16
申请号：US15679584
申请日：2017-08-17
申请人： FANUC CORPORATION
发明人： Tsutomu Nakamura , Satoshi Ikai
摘要： A motor control device includes a velocity controller configured to calculate a torque command from a velocity command and a motor velocity; a compensation torque calculation unit configured to calculate a compensation torque command by multiplying an error between the motor velocity and a velocity of a driven part by a compensation gain and a compensation filter; a torque control unit configured to control torque of a motor based on a value obtained by adding the torque command and the compensation torque command; and a setting change part configured to change a gain of the velocity controller according to an operating condition of the motor control device, and change at least one of the compensation gain and the compensation filter in accordance with a change in the gain of the velocity controller.
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公开(公告)号：US20180278184A1
公开(公告)日：2018-09-27
申请号：US15763394
申请日：2016-09-23
CPC分类号： H02P6/06 , B64D27/04 , B64D27/24 , B64D2027/026 , F02B53/02 , F02B2053/005 , H02P1/04 , H02P9/00 , H02P23/20 , H02P25/024
摘要： The synchronous machine module includes a synchronous machine and a rotational speed controller for controlling a rotational speed of the synchronous machine, which rotational speed controller has a detector for detecting a variable which is formed by the effective power or is dependent thereon. The rotational speed controller is designed to set the rotational speed of the synchronous machine and/or the time profile thereof as a function of the detected variable and/or its time profile. The vehicle drive has such a synchronous machine module and a power generator, which in order to supply the synchronous machine module is connected thereto. The vehicle is, in particular, an aircraft and has such a vehicle drive and/or such a synchronous machine module.
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公开(公告)号：US10066631B2
公开(公告)日：2018-09-04
申请号：US14375889
申请日：2014-01-28
发明人： Zheng Zhang , Jizhong Wang , Yiqiao Zhou , Yong Zhao
IPC分类号： H02P6/00 , F04D27/00 , H02P6/28 , F04D19/00 , F04D25/06 , F04D29/32 , H02P6/16 , H02P27/06 , H02P6/06 , F24F11/77
摘要： A control method for constant airflow controlled by a direct power-controlled PM motor, wherein the PM motor is installed in an HVAC system to drive the rotation of a fan wheel, and wherein the PM motor has a stator component, permanent magnet rotor components, and a motor controller. In some embodiments, the motor controller includes an operation parameters sensing circuit and a microprocessor.
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公开(公告)号：US10044297B2
公开(公告)日：2018-08-07
申请号：US15358179
申请日：2016-11-22
发明人： Chandra S. Namuduri , Rajeev Vyas , Fausto Eleazar Vazquez Flores , Mark J. Rychlinski , Varsha Sadekar
摘要： A vehicle including a cooling fan that is rotatably coupled to an electric motor that is electrically powered by a DC power source via an inverter is described. A method for controlling the cooling fan includes monitoring, via a first controller, a vehicle speed, and selecting a preferred operating state for the electric motor based upon the vehicle speed. The preferred operating state includes one of a first command associated with controlling the cooling fan to force air through the cooling system, a second command associated with a fan brake request, and a third command associated with an energy recovery mode. A discrete message from the first controller is communicated to an inverter controller, wherein the discrete message is based upon the preferred operating state for the electric motor. The inverter controller controls the inverter to control the electric motor in response to the discrete message.
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公开(公告)号：US20180183363A1
公开(公告)日：2018-06-28
申请号：US15808357
申请日：2017-11-09
发明人： Kentaro SAKAMOTO
摘要： A control device for controlling a motor is provided with: a first reception unit receiving a target value of a rotational speed of the motor; a second reception unit receiving speed information concerning the rotational speed of the motor; a control amount signal output unit determining the control amount based on the speed information and a target value and outputting the control amount signal; and a switch signal output unit outputting, based on the control amount for causing a decrease in the rotational speed due to the brake and indicated by the speed information to reach the target value, a switch signal for switching a torque generation direction of the motor.
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公开(公告)号：US09998042B2
公开(公告)日：2018-06-12
申请号：US13871591
申请日：2013-04-26
摘要： A circuit may be configured to adjust a correction signal for each phase of an electric motor based on a rotational position of a spindle of the electric motor, generate a distorted waveform based on the correction signal, and drive the electric motor in response to the distorted waveform. In some examples, back electromotive force (BEMF) may be determined in order to adjust a motor drive waveform, which may reduce or eliminate motor vibrations. A motor drive signal may be pre-warped (i.e. distorted) such that when the correctional signal and drive signals are combined, there is a reduction in acoustic emissions or motor vibrations. Other parameters, such as cogging torque, may be measured to reduce motor vibration and acoustic emissions.
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公开(公告)号：US09950417B2
公开(公告)日：2018-04-24
申请号：US13496846
申请日：2011-03-29
摘要： An electronic pulse driver includes a motor, a hammer, an anvil, an end tool mounting unit, a power supply unit, and a control unit. The hammer is rotatable together with the anvil. The end tool mounting unit transmits the rotation of the anvil to an end tool. The power supply unit supplies a drive electric power to the motor. The control unit controls the power supply unit to halt a supply of the drive electric power to the motor when an electric current flowing to the motor increases to a prescribed value. The control unit controls the power supply unit to supply to the motor a prestart electric power lower than the drive electric power before supplying the drive electric power in order to permit the power supply unit to supply the drive electric power after the hammer is in contact with the anvil.
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公开(公告)号：US20180109208A1
公开(公告)日：2018-04-19
申请号：US15788281
申请日：2017-10-19
发明人： Yue LI , Chui You ZHOU , Hong Liang YI , Yong Gang ZHANG , Yong WANG
CPC分类号： H02P6/06 , F04D13/06 , F04D15/0066 , F04D25/06 , F04D25/08 , F04D27/004 , H02P1/027 , H02P6/16 , H02P6/18 , H02P6/26 , H02P2207/05
摘要： A synchronous motor assembly includes a motor connected between two nodes of an AC power source, a motor drive circuit, and a regulation unit. The drive circuit drives the motor to rotate. The regulation unit regulates a rotation speed of the motor via regulating the motor to different steady voltage points.
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