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公开(公告)号：US10720822B2
公开(公告)日：2020-07-21
申请号：US15609501
申请日：2017-05-31
申请人： MAKITA CORPORATION
发明人： Akira Niwa
摘要： In a brushless motor comprising a stator core having a plurality of teeth that protrude therefrom in radial directions, a front insulator which is attached to the stator core and which has a plurality of insulating portions that protrude therefrom along the direction of protrusion of the respective teeth, and a plurality of coils formed by magnet wire wound about each of the insulating portions at the respective teeth, a top face of the respective insulating portions of the front insulator is provided in advance with a deformable rib which is capable of being deformed by tension of the magnet wire wound thereabout, and the magnet wire is wound about the deformable rib to form the coils as the deformable rib is made to deform in correspondence to the external shape of the magnet wire.
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公开(公告)号：US10228233B2
公开(公告)日：2019-03-12
申请号：US15505730
申请日：2014-08-25
申请人： SG CORPORATION
发明人： Hideki Kimata , Tomoshi Takatsuka
摘要： A rotation-detecting apparatus includes the following: a rotor coil provided on a rotor; detection coils provided on stators; a control circuit that detects the relative rotational angle between the rotor and the stators by processing detection signals induced in the detection coils as a result of the rotor coil being excited by an excitation signal; and a communicating means for performing data communication with an external device. The control circuit in the rotation-detecting apparatus has functionality whereby a switch signal that turns on and off at preset rotational angles is outputted on the basis of the aforementioned detection signals. Also, the control circuit is designed such that the set rotational angles for the aforementioned switch signal can be changed by the external device via the abovementioned communicating means.
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公开(公告)号：US20190058423A1
公开(公告)日：2019-02-21
申请号：US16104494
申请日：2018-08-17
发明人： Horst Knoedgen , Horst Schleifer
IPC分类号： H02P6/185 , H02P6/00 , H02K29/12 , H02K41/035 , G03B13/36
CPC分类号： H02P6/185 , G03B3/10 , G03B5/00 , G03B13/36 , G03B2205/0069 , H02K29/12 , H02K41/0356 , H02P6/006 , H02P6/182 , H02P25/034 , H02P2203/11
摘要： An actuation system is proposed for an optical system, comprising a voice coil motor for actuating the optical system, the voice coil motor comprising a magnet and an electric coil, a position measuring unit for measuring the position of the electric coil and providing a position feedback signal, and a control unit for closed loop control of the position of the optical system based on a target position and the position feedback signal, used for generating a drive signal for the electric coil. According to the disclosure, a ferromagnetic element is arranged in proximity to the electric coil so that the inductance of the electric coil depends on its position. Further, the position-measuring unit measures the inductance of the electric coil and determines the position of the electric coil based on the determined inductance.
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公开(公告)号：US09991831B2
公开(公告)日：2018-06-05
申请号：US15509463
申请日：2015-09-17
申请人： OMRON Corporation
发明人： Katsumi Matsushita , Hiroyuki Ibuki
CPC分类号： H02P7/2985 , A63F7/02 , A63F7/022 , G07F17/3213 , H02P7/285 , H02P7/29 , H02P8/00
摘要： A DC motor control device includes a communication circuit configured to receive a control command specifying a target rotation amount for a DC motor, a sensor interface configured to receive a detection signal from a rotational angle sensor that outputs the detection signal every time the DC motor rotates by a certain rotational angle, a step counter that outputs a count signal every time the detection signal has been received a certain number of times, a controller that, based on the number of times the count signal received, determines a step count representing the total amount of rotation, and generates a control signal that controls the DC motor in accordance with the step count and the target rotation amount, and a drive signal generation circuit that generates a drive signal that rotates the DC motor in accordance with the control signal.
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公开(公告)号：US09906108B2
公开(公告)日：2018-02-27
申请号：US14559037
申请日：2014-12-03
发明人： Kum Kang Huh , Patel Bhageerath Reddy , Ayman Mohamed Fawzi El-Refaie , Patrick Lee Jansen , Roy David Schultz , Lembit Salasoo
摘要： An electric machine that includes a rotor core made of magnetic steel; a stator configured with stationary windings therein; openings disposed within or on the rotor core; and a rotor circuit that is configured to introduce saliency based on an orientation of part of the rotor circuit in relationship to a pole location of the electric machine, where the rotor circuit is made of a conductive, non-magnetic material. A rotor component and various embodiments of electric machines are also disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
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公开(公告)号：US09871418B2
公开(公告)日：2018-01-16
申请号：US14974848
申请日：2015-12-18
发明人： Kum Kang Huh , Patel Bhageerath Reddy , Ayman Mohamed Fawzi El-Refaie , Patrick Lee Jansen , Roy David Schultz , Lembit Salasoo
摘要： A rotor component that comprises a rotor circuit configured for use with either an interior permanent magnet (IPM) machine or a synchronous reluctance machine (SRM) that includes a pole circuit made of a conductive, non-magnetic material and has a midpoint that substantially aligns with a d-axis of the IPM or SRM. An electric machine with a similar rotor component therein or having a loop or ring of a conductive, non-magnetic material that is substantially concentric about a d-axis of the electric machine.
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公开(公告)号：US09695832B2
公开(公告)日：2017-07-04
申请号：US14462821
申请日：2014-08-19
IPC分类号： F04D27/00 , F04D13/06 , F04D15/00 , F04D25/06 , H02K29/12 , H02K29/14 , H02P6/08 , H02P6/182 , H02P29/032
CPC分类号： F04D27/004 , F04D13/0693 , F04D15/0094 , F04D25/0693 , F04D27/001 , H02K29/12 , H02K29/14 , H02P6/08 , H02P6/182 , H02P29/032
摘要： An integrated circuit for controlling operation of a motor of a fan assembly. The fan assembly includes a housing and a fan. The motor is in the housing. The housing is void of sensors. The motor is configured to rotate the fan. The integrated circuit includes a detection module and a first control module. The detection module is separate from the fan assembly. The detection module is configured to detect a voltage induced in a first coil of the motor or a back electromotive force received from the first coil of the motor. The first control module is configured to receive a control signal from a second control module and control the operation of the fan based on (a) the control signal, and (b) the voltage induced in the first coil of the motor or the back electromotive force. The second control module is separate from the integrated circuit.
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公开(公告)号：US09537380B2
公开(公告)日：2017-01-03
申请号：US14005429
申请日：2012-01-18
摘要： A permanent-magnet type rotating electrical machine, including a rotor including a plurality of magnetic poles arranged at an equal interval, and a stator including a plurality of teeth and a plurality of armature windings. A high frequency voltage different in frequency and amplitude from voltages for generating a torque is applied to the armature windings. A magnetic pole position of the rotor is estimated by using a current trajectory of a measured high frequency current. When dq transform is applied to the measured high frequency current, a current trajectory forms an ellipse on d and q axes. Angular variation ranges of a major axis of the ellipse with respect to a load current and a rotor position are set so as to acquire a predetermined position estimation resolution.
摘要翻译： 一种永磁式旋转电机，包括具有以相等间隔排列的多个磁极的转子和包括多个齿的定子和多个电枢绕组。 将频率和振幅与产生转矩的电压不同的高频电压施加到电枢绕组。 通过使用测量的高频电流的当前轨迹来估计转子的磁极位置。 当对测量的高频电流施加dq变换时，当前轨迹在d轴和q轴上形成一个椭圆。 椭圆相对于负载电流和转子位置的长轴的角度变化范围被设定为获得预定的位置估计分辨率。
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公开(公告)号：US09344023B2
公开(公告)日：2016-05-17
申请号：US13751664
申请日：2013-01-28
申请人： NIDEC CORPORATION
发明人： Hiroyuki Shitabou
摘要： A motor device includes a motor unit and a converter unit. The motor unit includes an inverter circuit; an inverter drive circuit; a brushless DC motor comprising a rotor and a stator; a first shunt resistor; a first input terminal; a second input terminal; a third input terminal; a first output terminal; and a first ground terminal. The converter unit includes a case; a AC/DC converter; a microcomputer; a first output terminal; a second output terminal; a third output terminal; a first input terminal; a second shunt resistor; and a second grounding terminal. The microcomputer calculates a current value by using the terminal voltage and a resistance value of the second shunt resistor, compares the current value with a specified current value, and limit or cut off the output of the analog control signal when the current value exceeds the specified current value.
摘要翻译： 马达装置包括马达单元和转换器单元。 电动机单元包括逆变器电路; 逆变器驱动电路; 包括转子和定子的无刷DC马达; 第一分流电阻; 第一输入端; 第二输入端; 第三输入端; 第一输出端子; 和第一个接地终端。 转换器单元包括壳体; 一个AC / DC转换器; 微电脑 第一输出端子; 第二输出端子; 第三输出端子; 第一输入端; 第二分流电阻器; 和第二接地端子。 微计算机通过使用端子电压和第二分流电阻器的电阻值来计算电流值，将电流值与规定的电流值进行比较，并且当电流值超过规定值时限制或切断模拟控制信号的输出 当前值。
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公开(公告)号：US09300194B2
公开(公告)日：2016-03-29
申请号：US13292832
申请日：2011-11-09
摘要： An electromagnetic device is provided and includes a stator defining a bore, a rotor rotatable within the stator bore and having permanent magnetic elements disposed about an outer surface thereof to define a series of magnetic poles, power coils configured to generate a power current as a first portion of the magnetic poles pass each of the power coils due to rotor rotation and sense coils configured to generate a sense current as a second portion of the magnetic poles pass each of the sense coils due to the rotor rotation.
摘要翻译： 提供一种电磁装置，其包括限定孔的定子，可在定子孔内旋转的转子，并具有围绕其外表面设置的永久磁性元件，以限定一系列磁极，配置为产生功率电流的功率线圈，作为第一 部分磁极由于转子旋转而通过每个功率线圈，并且感测线圈被配置为当由于转子旋转而使每个感测线圈通过磁极的第二部分时产生感测电流。
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