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    Circuit, motor, and method generating a signal representing back EMF in an energized motor winding
    1.
    发明授权
    Circuit, motor, and method generating a signal representing back EMF in an energized motor winding 失效
    电路，电动机和方法产生表示在电动机绕组中的反电动势的信号

    公开(公告)号：US5696430A

    公开(公告)日：1997-12-09

    申请号：US469200

    申请日：1995-06-06

    申请人： David M. Erdman ,  Eric R. Benedict

    发明人： David M. Erdman ,  Eric R. Benedict

    IPC分类号： F23N3/08 ,  F23N5/18 ,  H02K29/03 ,  H02P6/00 ,  H02P6/08 ,  H02P6/18 ,  H02P25/04 ,  H02P7/00

    CPC分类号： H02P25/04 ,  F23N3/082 ,  H02K29/03 ,  H02P6/085 ,  H02P6/182 ,  H02P6/26 ,  F23N2025/04 ,  F23N2025/06 ,  F23N2033/04 ,  F23N5/18 ,  H02K2201/06 ,  H02P6/08

    摘要： A motor includes a stationary assembly and a rotatable assembly in magnetic coupling relation thereto. The stationary assembly includes a winding, the rotation of the rotatable assembly inducing a back EMF in the winding. A power supply for supplying a voltage across the winding drives a current through the winding. A back EMF sensor connected to the winding generates a back EMF signal representative of the back EMF induced in the winding during periods of time when the voltage is being supplied across the winding. An inverter connected between the power supply and the winding commutates the winding as a function of the back EMF signal, whereby the rotatable assembly rotates. A method of operating the motor and a control circuit for the motor employ the back emf induced in the winding during periods when the voltage is being applied to the winding by the power supply.

    摘要翻译： 电动机包括固定组件和与其耦合的磁耦合的可旋转组件。 固定组件包括绕组，可旋转组件的旋转引起绕组中的反电动势。 用于在绕组上提供电压的电源驱动通过绕组的电流。 连接到绕组的反电动势传感器产生表示在绕组上提供电压的时间段期间在绕组中感应的反电动势的反EMF信号。 连接在电源和绕组之间的逆变器根据反电动势信号将绕组换向，由此可旋转组件旋转。 在通过电源将电压施加到绕组的期间，操作电动机的方法和用于电动机的控制电路采用在绕组中感应的反电动势。

    Quadrature axis winding for sensorless rotor angular position control of single phase permanent magnet motor
    3.
    发明授权
    Quadrature axis winding for sensorless rotor angular position control of single phase permanent magnet motor 失效
    单相永磁电机无转子转子角位置控制的正交绕组

    公开(公告)号：US5986419A

    公开(公告)日：1999-11-16

    申请号：US48946

    申请日：1998-03-26

    申请人： William R. Archer ,  Roger C. Becerra ,  Brian L. Beifus ,  Mark A. Brattoli ,  David M. Erdman ,  Thomas M. Jahns ,  Gerald B. Kliman ,  Wen Liang Soong ,  Charles M. Stephens ,  Eric R. Benedict ,  Michael W. Degner

    发明人： William R. Archer ,  Roger C. Becerra ,  Brian L. Beifus ,  Mark A. Brattoli ,  David M. Erdman ,  Thomas M. Jahns ,  Gerald B. Kliman ,  Wen Liang Soong ,  Charles M. Stephens ,  Eric R. Benedict ,  Michael W. Degner

    IPC分类号： H02K29/12 ,  H02P6/00 ,  H02P6/16 ,  H02P6/22 ,  H02K23/00

    CPC分类号： H02P6/22 ,  H02K29/12 ,  H02P6/15 ,  H02P6/16 ,  H02P6/26

    摘要： A single phase permanent magnet motor includes a rotor, a stator, and a quadrature axis winding positioned out-of-phase from a main winding of the stator for generating an output signal representative of rotor angular position. An integrator can be coupled to the quadrature axis winding for phase retarding the output signal, and a comparator can be coupled to the integrator for detecting zero crossings of the phase retarded output signal to provide a commutation signal. The quadrature axis winding can be positioned about ninety electrical degrees out-of-phase from the main winding of the stator, and the integrator can be adapted to phase retard the output signal by a number of degrees which decreases as a speed of the motor increases. At low speeds the phase retard is preferably at about ninety degrees so that the phase retarded signal becomes in-phase with the main stator winding back EMF voltage. The motor may further include a rectifier coupled to the quadrature axis winding for rectifying the output signal, and a lowpass filter for filtering the rectified output signal to provide a signal proportional to velocity. Also the single phase motor is commutated for maximum torque production.

    摘要翻译： 单相永磁电动机包括转子，定子和与定子的主绕组不同相位置的正交绕组，用于产生表示转子角位置的输出信号。 积分器可以耦合到正交轴线圈，用于相位延迟输出信号，并且比较器可以耦合到积分器，用于检测相位延迟输出信号的过零点以提供换向信号。 正交绕组可以定位在与定子的主绕组相差大约九十度的位置上，并且积分器可以适合于将输出信号相位延迟多少度，随着电机速度的增加而减小 。 在低速时，相位延迟优选地在大约九十度，使得相位延迟信号与主定子绕组反电动势电压同相。 电动机还可以包括耦合到正交轴线圈的整流器，用于整流输出信号;以及低通滤波器，用于对整流的输出信号进行滤波以提供与速度成比例的信号。 单相电动机也可以进行换向，以实现最大扭矩产生。

    Electrical motor with a differential phase back EMF sensing circuit for sensing rotor position
    5.
    发明授权
    Electrical motor with a differential phase back EMF sensing circuit for sensing rotor position 失效
    具有差分反相电动势检测电路的电动机用于感测转子位置

    公开(公告)号：US5646491A

    公开(公告)日：1997-07-08

    申请号：US439580

    申请日：1995-05-11

    申请人： David M. Erdman ,  James A. Beatty

    发明人： David M. Erdman ,  James A. Beatty

    IPC分类号： H02P6/18 ,  H02P7/00

    CPC分类号： H02P6/182

    摘要： A motor having a differential phase back EMF sensing circuit for sensing rotor position includes a stationary assembly with at least three windings. The rotation of the rotor induces a back EMF in the windings. A control circuit energizes each of the windings with a current according to a preselected sequence. A switch network is coupled to the windings and provides two back EMF signals as a function of the back EMF induced in two of the windings when the control circuit is energizing the third winding. A signal processor is coupled to the switch network and produces a difference signal representative of a difference between the two back EMF signals. An integrator integrates the difference signal to produce an integrated difference signal. The motor includes a reference signal generator which produces a reference signal and a comparator which produces a trigger signal when the integrated difference signal exceeds the reference signal. The motor also includes a one shot which produces a position signal as a function of the trigger signal and a position counter which produces a position count signal as a function of the position signal. The control circuit energizes each of the windings according to the preselected sequence as a function of the position count signal. Other circuits and methods control the motor. The trigger signal may be generated in response to a zero crossing detector and timer.

    摘要翻译： 具有用于感测转子位置的差分反相EMF感测电路的电动机包括具有至少三个绕组的固定组件。 转子的旋转引起绕组中的反电动势。 控制电路根据预先选择的顺序用电流使每个绕组通电。 当控制电路对第三绕组通电时，开关网络耦合到绕组并提供两个反向EMF信号作为在两个绕组中感应的反电动势的函数。 信号处理器耦合到开关网络并产生表示两个反电动势信号之间的差的差信号。 积分器积分差分信号以产生积分差分信号。 电动机包括产生参考信号的参考信号发生器和当积分差分信号超过参考信号时产生触发信号的比较器。 电动机还包括一次，其产生作为触发信号的函数的位置信号，以及产生作为位置信号的函数的位置计数信号的位置计数器。 控制电路根据作为位置计数信号的函数的预选顺序使每个绕组通电。 其他电路和方法控制电机。 可以响应于过零检测器和定时器产生触发信号。

    Control system, electronically commutated motor system, draft inducer apparatus and method
    6.
    发明授权
    Control system, electronically commutated motor system, draft inducer apparatus and method 失效
    控制系统，电子换向电机系统，牵引机设备及方法

    公开(公告)号：US5075608A

    公开(公告)日：1991-12-24

    申请号：US483329

    申请日：1990-02-20

    申请人： David M. Erdman ,  Mark A. Brattoli

    发明人： David M. Erdman ,  Mark A. Brattoli

    IPC分类号： B60H1/32 ,  F23N3/08 ,  F25B49/02 ,  G05D23/19 ,  H02K29/06 ,  H02K29/10 ,  H02P6/16 ,  H02P6/18

    CPC分类号： F23N3/082 ,  F25B49/025 ,  G05D23/19 ,  H02K29/06 ,  H02K29/10 ,  H02P6/16 ,  H02P6/182 ,  F23N2033/04 ,  F25B2600/021

    摘要： A control system and method for an electronically commutated motor having a stationary assembly with a plurality of winding stages for carrying a motor current in response to application of a voltage having a magnitude subject to variations, the motor further having a rotatable assembly. The control system is adapted to receive control pulses having a duty cycle which is a function of a desired operating torque or speed for the motor. The control system and method are responsive to the motor current for generating a pluse width modulated (PWM) series of pulses having a pulse repetition rate having a duty cycle which is a function of the duty cycle of the control pulses. The PWM series of pulses are supplied to the commutating circuit as a pulsed signal whereby the operating torque or speed of the motor is a function of the duty cycle of the control pulses and is substantially independent of variations in the magnitude of the applied voltage. The control system may be part of a draft inducer apparatus or method for use with a combustion chamber having an exhaust outlet including a fan for moving air through the exhaust outlet and thereby to induce a draft in the combustion chamber. A pressure sensor connected to the motor control apparatus may be located within the exhaust outlet.

    摘要翻译： 一种用于电子换向电动机的控制系统和方法，具有具有多个绕组段的固定组件，用于响应于施加具有变化幅度的电压而承载电动机电流，所述电动机还具有可旋转组件。 控制系统适于接收具有占空比的控制脉冲，该占空比是电动机的期望的操作转矩或速度的函数。 控制系统和方法响应于电动机电流，用于产生具有占空比的脉冲重复频率的脉冲宽度调制（PWM）脉冲序列，该占空比是控制脉冲的占空比的函数。 PWM脉冲序列作为脉冲信号提供给换向电路，由此马达的运行转矩或速度是控制脉冲的占空比的函数，并且基本上与所施加的电压的幅度的变化无关。 控制系统可以是与具有排气出口的燃烧室一起使用的牵引式诱导装置或方法的一部分，所述排气出口包括用于通过排气出口移动空气的风扇，从而在燃烧室中引起通风。 连接到马达控制装置的压力传感器可以位于排气出口内。

    Permanent-magnet generator and method of cooling
    9.
    发明授权
    Permanent-magnet generator and method of cooling 有权
    永磁发电机和冷却方法

    公开(公告)号：US07701095B2

    公开(公告)日：2010-04-20

    申请号：US11881856

    申请日：2007-07-30

    申请人： Daniel Gizaw ,  David M. Erdman ,  Joseph E. Miller ,  Girma Desta

    发明人： Daniel Gizaw ,  David M. Erdman ,  Joseph E. Miller ,  Girma Desta

    IPC分类号： H02K9/00

    CPC分类号： H02K5/20 ,  H02K21/14 ,  H02K2201/06

    摘要： The invention is a generator and cooling mechanism. The generator includes a rotor comprising a shaft with a skewed alignment of magnets on a ring, a stator of toothed laminations with coils wound around the teeth, and a housing with cooling chambers. The housing has annular subchambers arranged successively along the length of the generator in such a way that cooling fluid must flow to the opposite side of the generator to pass into the next chamber. Because the housing is highly heat conductive, this structure of annular subchambers increases the uniformity of the fluid temperature.

    摘要翻译： 本发明是发电机和冷却机构。 该发电机包括一个转子，该转子包括一个轴，该轴具有一个环上的磁体的倾斜对准，一个具有缠绕在齿周围的线圈的齿形叠片的定子和一个具有冷却室的壳体。 壳体具有沿着发电机的长度连续布置的环形子室，使得冷却流体必须流动到发生器的相对侧以进入下一个室。 因为外壳是高度导热的，所以这种环形子室的结构增加了流体温度的均匀性。

    Motor with external rotor
    10.
    发明授权
    Motor with external rotor 有权
    带外转子的电机

    公开(公告)号：US06239532B1

    公开(公告)日：2001-05-29

    申请号：US09401238

    申请日：1999-09-23

    申请人： Robert K. Hollenbeck ,  David M. Erdman ,  Dennis P. Bobay ,  James E. Grimm ,  Harold B. Harms ,  David T. Molnar

    发明人： Robert K. Hollenbeck ,  David M. Erdman ,  Dennis P. Bobay ,  James E. Grimm ,  Harold B. Harms ,  David T. Molnar

    IPC分类号： H02K112

    CPC分类号： H02K29/08 ,  H02K1/145 ,  H02K5/1675 ,  H02K21/227 ,  H02K2201/06 ,  H02K2201/12

    摘要： An inside out motor includes a rotor including a concave member, a shaft defining a longitudinal axis mounted on the concave member and a magnet mounted on an interior surface of the concave member. A bearing receives the shaft for rotatably mounting the rotor. A stator assembly is mounted on said bearing and includes a bobbin mounted generally coaxially with the rotor shaft and having an interior diameter, an exterior diameter, a first axial end and a second axial end. A winding is wound on the bobbin and extends around the axis of the rotor shaft. The winding has a width in a direction parallel to the lengthwise extension of the rotor shaft. Plural separate ferromagnetic members are on each of the first and second axial ends of the bobbin. Each ferromagnetic member has a radially outer leg extending generally between the winding and the magnet. The outer legs of the ferromagnetic members on the first axial end of the bobbin extend generally from the first axial end of the bobbin toward the second axial end and the outer legs of the ferromagnetic members on the second axial end of the bobbin extend generally from the second axial end toward the first axial end. The ferromagnetic members on each of the first and second axial ends are disposed in angularly spaced, non-overlying positions around the longitudinal axis with respect to the other ferromagnetic members on the same axial end.

    摘要翻译： 内置马达包括转子，该转子包括凹形构件，限定安装在凹形构件上的纵向轴线的轴和安装在该凹形构件的内表面上的磁体。 轴承接收用于可转动地安装转子的轴。 定子组件安装在所述轴承上并且包括与转子轴大致同轴地安装并具有内径，外径，第一轴向端和第二轴向端的筒管。 绕组缠绕在绕线筒上并围绕转子轴的轴线延伸。 绕组在与转子轴的长度方向平行的方向上具有宽度。 在线轴的第一和第二轴向端中的多个分开的铁磁构件。 每个铁磁构件具有通常在绕组和磁体之间延伸的径向外部支脚。 筒管的第一轴向端部上的铁磁构件的外腿大体上从筒管的第一轴向端向第二轴向端部延伸，并且线轴的第二轴向端部上的铁磁构件的外腿大致从 第二轴向端朝向第一轴向端。 第一和第二轴向端部中的每一个上的铁磁构件相对于在同一轴向端部上的其它铁磁构件围绕纵向轴线成角度地间隔开的非覆盖位置设置。