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1.发明授权Discrete position estimator for a switched reluctance machine using a flux-current map comparator 失效使用磁通电流图比较器的开关磁阻电机的离散位置估计器
公开(公告)号：US5140243A
公开(公告)日：1992-08-18
申请号：US760039
申请日：1991-09-13
CPC分类号： H02P25/08 , H02P25/089 , H02P6/18
摘要： A rotor position estimator for a switched reluctance motor (SRM) employs a flux-current map to determine whether the actual rotor angle is closer to, or farther from, axial alignment of stator and rotor poles than a reference angle .theta..sub.r. The flux-current map is a plot of reference flux .PSI..sub.r as a function of current for the reference angle .theta..sub.r. If a flux linkage estimate .PSI..sub.i is greater than the reference flux .PSI..sub.r, then the actual rotor angle is closer to alignment than the reference angle .theta..sub.r, and the flux-map comparator output is a logic level one. If the flux linkage estimate .PSI..sub.i is lower than the reference flux .PSI..sub.r, then the actual rotor angle is farther from alignment than the reference angle .theta..sub.r, and the flux-map comparator output is a logic level zero. When the result of the flux comparison causes the flux-current map comparator to change state, the actual rotor angle is equal to the reference angle .theta..sub.r, with the result that phase currents can be successfully commutated relative to this rotor position. The flux-current map can be implemented using either single-phase or multi-phase SRM flux-current characteristics.
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公开(公告)号：US5300843A
公开(公告)日：1994-04-05
申请号：US970197
申请日：1992-11-02
CPC分类号： F16C32/0442 , F16C32/0482
摘要： A fault tolerant active magnetic bearing has at least three magnetically isolated control axes. To this end, the active magnetic bearing has a segmented stator which employs non-magnetic sections for magnetically isolating adjacent electromagnetic force actuators, and hence adjacent control axes. As a result, operating force actuators are not affected by magnetic poles experiencing a fault. Hence, in a three-phase active magnetic bearing rotor suspension control system, for example, full control of rotor shaft position can be maintained with only two functioning control axes.
摘要翻译： 容错主动磁轴承具有至少三个磁隔离的控制轴。 为此，主动磁轴承具有分段定子，该分段定子采用非磁性部分用于磁相隔离相邻的电磁力致动器，因此相邻的控制轴。 结果，操作力执行器不受经历故障的磁极的影响。 因此，在三相有源磁轴承转子悬架控制系统中，例如，可以仅使用两个功能控制轴来维持转子轴位置的完全控制。
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公开(公告)号：US5300842A
公开(公告)日：1994-04-05
申请号：US970196
申请日：1992-11-02
申请人： James P. Lyons , Mark A. Preston
发明人： James P. Lyons , Mark A. Preston
CPC分类号： F16C32/0448 , F16C32/0442 , F16C32/0482 , G01B7/144
摘要： In an active magnetic bearing system employing radial or thrust bearings, rotor shaft position is determined without requiring air gap position sensors, resulting in a high reliability system. The flux paths for each respective electromagnetic force actuator of the active magnetic bearing are isolated in order to minimize the magnetic coupling therebetween. The active magnetic bearing system is controlled for mutually exclusive excitation of each of the two actuators (e.g., stator pole pairs) per control axis. A sequence of test voltage pulses is applied to the unexcited one of each actuator pole-pair. At the peak of an applied test voltage pulse, after a predetermined time interval, the pole flux linkage is estimated using either an analog or software integrator. The integrator is reset at zero current, and hence zero flux, thereby avoiding accumulation of errors. The effective air gap length is determined from the inherent magnetization characteristic of the magnetic bearing using the measured current and the estimated flux linkage. Effectively, each magnetic pole is used alternately for force actuation and for inductive feedback sensing, eliminating the need for separate position sensors.
摘要翻译： 在采用径向或推力轴承的主动磁轴承系统中，确定转子轴位置，而不需要气隙位置传感器，从而产生高可靠性系统。 主动磁轴承的每个相应电磁力致动器的磁通路径是隔离的，以便使它们之间的磁耦合最小化。 控制主动磁轴承系统，用于每个控制轴的两个致动器（例如，定子极对）中的每一个相互排斥的激励。 将一系列测试电压脉冲施加到每个致动器极对中的未激励的一个。 在施加的测试电压脉冲的峰值处，在预定时间间隔之后，使用模拟或软件积分器来估计极点磁链。 积分器在零电流下复位，因此零通量，从而避免误差累积。 有效气隙长度根据使用测量电流和估计磁通量的磁轴承的固有磁化特性确定。 有效地，每个磁极交替地用于力致动和用于感应反馈感测，消除了对单独的位置传感器的需要。
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公开(公告)号：US5300841A
公开(公告)日：1994-04-05
申请号：US970194
申请日：1992-11-02
申请人： Mark A. Preston , James P. Lyons
发明人： Mark A. Preston , James P. Lyons
CPC分类号： F16C32/0482 , F16C32/0442 , F16C32/0448 , G01B7/144
摘要： In an active magnetic bearing system employing radial or thrust bearings, rotor shaft position is determined without requiring air gap position sensors, resulting in a high reliability system. The flux paths for each respective electromagnetic force actuator of the active magnetic bearing are isolated in order to minimize the magnetic coupling therebetween. In this way, the current (or magnetomotive force, mmf) in each respective actuator is functionally related to the flux therethrough, independent of the currents (or mmf's) in adjacent actuators. Application of a digital PWM pole voltage waveform during normal bearing operation results in a ripple current waveform at the PWM switching frequency. The resulting change in stator pole current and pole voltage are measured, and the average differential inductance is determined therefrom. Then, with knowledge of the differential inductance and the average pole current, the effective air gap length, air gap velocity, and magnetic flux are determined according to the inherent magnetization characteristic of the magnetic bearing.
摘要翻译： 在采用径向或推力轴承的主动磁轴承系统中，确定转子轴位置，而不需要气隙位置传感器，从而产生高可靠性系统。 主动磁轴承的每个相应电磁力致动器的磁通路径是隔离的，以便使它们之间的磁耦合最小化。 以这种方式，与相邻致动器中的电流（或mmf）无关，每个相应致动器中的电流（或磁动势mmf）在功能上与其通量相关。 在正常轴承运行期间应用数字PWM极电压波形会导致PWM开关频率处的纹波电流波形。 测量定子极电流和极点电压的最终变化，并且由此确定平均差分电感。 然后，根据差动电感和平均极电流的知识，根据磁轴承的固有磁化特性确定有效气隙长度，气隙速度和磁通量。
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公开(公告)号：US5578880A
公开(公告)日：1996-11-26
申请号：US276586
申请日：1994-07-18
申请人： James P. Lyons , Mark A. Preston
发明人： James P. Lyons , Mark A. Preston
CPC分类号： F16C32/0442 , F16C32/0455 , F16C32/0482 , H02K7/09 , F16C32/0457
摘要： A fault tolerant active magnetic bearing system comprises a magnetic bearing having a rotor mounted for rotation within a stator and for coupling to a shaft. An electric power distribution system is energized from a multi-phase switched reluctance machine supplying three independent DC power buses. Each of the power buses is coupled for supplying power to a respective pair of diametrically opposite electromagnets of the magnetic bearing so as to establish multiple magnetic control axes. Multiple power controllers are each operatively connected in circuit with a separate respective power bus. The power controllers include independent power control systems each coupled to a respective pair of diametrically opposite electromagnets for independently controlling energization of each one of the pair of diametrically opposite electromagnets.
摘要翻译： 容错主动磁轴承系统包括具有安装用于在定子内旋转并用于联接到轴的转子的磁性轴承。 电力分配系统由提供三个独立直流电源总线的多相开关磁阻电机供电。 每个电源总线被耦合用于向磁轴承的相应的一对直径相对的电磁体供电，以便建立多个磁控制轴。 多个功率控制器各自可操作地连接到具有单独的相应电力总线的电路中。 功率控制器包括独立的功率控制系统，每个功率控制系统各自耦合到相应的一对直径相对的电磁体，用于独立地控制一对直径相对的电磁体中的每一个的通电。
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6.发明授权Low speed position estimator for switched reluctance machine using flux/current model 失效使用磁通/电流模型的开关磁阻电机的低速位置估计器
公开(公告)号：US5525886A
公开(公告)日：1996-06-11
申请号：US263990
申请日：1994-06-23
申请人： James P. Lyons , Mark A. Preston
发明人： James P. Lyons , Mark A. Preston
CPC分类号： H02P6/185 , H02P25/0925
摘要： A method for estimating rotor position of a switched reluctance motor during rotor start-up or low speed operation includes applying a sequence of relatively high frequency, short duration electric probing pulses to at least two inactive excitation phase windings of a multi-phase motor. The voltage and current at each of the two inactive excitation phase windings are measured and the resultant values used to compute an estimated rotor/stator linkage/flux in each of the two excitation phase windings. The computed linkage/flux and measured phase current of the two inactive excitation windings is then used in a model to determine the rotor position. In one form, rotor position is determined by establishing a table of values representing rotor position as a function of phase current for each of a plurality of values of motor phase linkage/flux and selecting from the table a value of rotor position corresponding to the measured phase current and computed linkage/flux for the phase.
摘要翻译： 用于在转子启动或低速操作期间估计开关磁阻电动机的转子位置的方法包括将相对高频，短持续时间的电探测脉冲序列应用于多相电动机的至少两个无功激励相绕组。 测量两个无功激励相绕组中的每一个处的电压和电流，并且所得到的值用于计算两个励磁相绕组中的每一个中的估计的转子/定子联动/通量。 然后将两个无效激励绕组的计算的联动/通量和测量的相电流用于模型中以确定转子位置。 在一种形式中，转子位置通过根据电动机相位/磁通的多个值中的每一个建立表示作为相电流的函数的转子位置的值的值来确定，并且从表中选择对应于所测量的转子位置的值 相电流和相位的计算连接/通量。
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7.发明授权Rotor position estimator for a switched reluctance machine using a lumped parameter flux/current model 失效使用集总参数通量/电流模型的开关磁阻电机的转子位置估计器
公开(公告)号：US5107195A
公开(公告)日：1992-04-21
申请号：US653371
申请日：1991-02-11
CPC分类号： H02P6/18 , H02P25/089
摘要： A method and apparatus for indirectly determining rotor position in a switched reluctance motor (SRM) are based on a flux/current model of the machine, which model includes multi-phase saturation, leakage, and mutual coupling effects. The flux/current model includes a network mesh of stator, rotor and air gap reluctance terms. The network is driven by magnetomotive force (mmf) terms corresponding to the ampereturns applied to each of the stator poles. Phase current and flux sensing for each phase are performed simultaneously. The reluctance terms of the flux/current model are determined from the phase flux and current measurements. The phase current and flux measurements also determine the rotor position angle relative to alignment for each respective motor phase and which phase (or phases) is operating in its predetermined optimal sensing region defined over a range of rotor angles. The measurements on at least two phases are then used for establishing whether the stator phases of the sensing phase are approaching alignment or maximum unalignment with SRM rotor poles. Finally, the rotor position angle for the sensing phase and its position relative to alignment are used to provide a rotor position estimate for the motor.
摘要翻译： 用于间接确定开关磁阻电动机（SRM）中的转子位置的方法和装置基于机器的通量/电流模型，该模型包括多相饱和，泄漏和相互耦合效应。 磁通/电流模型包括定子，转子和气隙磁阻项的网格。 网络由对应于施加到每个定子极的安培数的磁动势（mmf）条件驱动。 同相执行每相的相电流和通量感应。 通量/电流模型的磁阻条件由相位通量和电流测量值确定。 相电流和通量测量还确定相对于每个相应电动机相位的对准的转子位置角度以及哪个相位（或相位）在其在转子角度范围上限定的预定最佳感测区域中操作。 然后使用至少两相的测量来确定感测相位的定子相位是否接近与SRM转子极的对准或最大不对准。 最后，用于感测相位的转子位置角度及其相对于对准的位置用于为电动机提供转子位置估计。
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公开(公告)号：US5424595A
公开(公告)日：1995-06-13
申请号：US361917
申请日：1994-12-22
CPC分类号： F16C32/0493 , H02K19/103 , H02K7/09
摘要： The invention comprises a switched reluctance machine including a stator and a rotor wherein the stator includes stator teeth wound with separately excitable phase windings. The separately excitable phase windings receiving a combination of signals wherein the first of those signals is a phase winding signal and the second of those signals is a magnetic bearing signal. A method of controlling a switched reluctance machine wherein the switched reluctance machine includes separately excitable stator windings. The method comprising the steps of exciting each stator winding with a signal representative of the phase excitation for that winding and superimposing on each of said windings a signal capable of producing the magnetic force necessary to support the rotor in the absence of a mechanical bearing.
摘要翻译： 本发明包括一种包括定子和转子的开关磁阻电机，其中定子包括缠绕有可分离的相绕组的定子齿。 接收信号组合的分开可激发的相绕组，其中第一信号是相绕组信号，而第二信号是磁轴承信号。 一种控制开关磁阻电机的方法，其中开关磁阻电机包括单独可兴奋的定子绕组。 该方法包括以下步骤：用表示该绕组的相位激励的信号激励每个定子绕组，并且在每个绕组上叠加一个能够产生在没有机械轴承的情况下支撑转子所需的磁力的信号。
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9.发明授权
公开(公告)号：US5548172A
公开(公告)日：1996-08-20
申请号：US537500
申请日：1995-10-27
CPC分类号： H02K21/46 , H02K1/2726 , H02K15/03 , Y10T29/49012 , Y10T29/49076
摘要： A rotor for use in a line start permanent magnet motor comprises a rotor core having a shaft and including teeth defining slots; a rotor cage, at least a portion of which extends through the slots; and a layer of composite permanent magnet material at least partially coating the rotor core.
摘要翻译： 用于线路启动永磁电动机的转子包括具有轴的转子铁芯和包括限定槽的齿; 转子笼，其至少一部分延伸穿过槽; 以及至少部分地涂覆转子芯的复合永磁材料层。
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10.发明授权
公开(公告)号：US5489844A
公开(公告)日：1996-02-06
申请号：US61931
申请日：1993-05-17
申请人： Mark A. Preston , Robert D. King
发明人： Mark A. Preston , Robert D. King
CPC分类号： G01P3/488 , G01D3/036 , G01D5/147 , G01P13/045
摘要： An array of three magnetic sensors in a single package is employed with a single bias magnet for sensing shaft position, speed and direction of a motor in a high magnetic noise environment. Two of the three magnetic sensors are situated in an anti-phase relationship (i.e., 180.degree. out-of-phase) with respect to the relationship between the other of the two sensors and magnetically salient target, and the third magnetic sensor is situated between the anti-phase sensors. The result is quadrature sensing with noise immunity for accurate relative position, speed and direction measurements.
摘要翻译： 单个封装中的三个磁性传感器的阵列与单个偏置磁体一起使用，用于在高磁噪声环境中感测电机的轴位置，速度和方向。 三个磁性传感器中的两个相对于两个传感器中的另一个和磁性显着目标之间的关系处于相位关系（即，180°异相）中，并且第三磁性传感器位于 反相传感器。 结果是具有抗噪声的正交感测，用于精确的相对位置，速度和方向测量。
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