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1. 发明授权

US4011489A Apparatus for regulating magnetic flux in an AC motor 失效
标题翻译：用于调节交流电机中的磁通量的装置
公开(公告)号：US4011489A
公开(公告)日：1977-03-08
申请号：US525613
申请日：1974-11-20
申请人： Joseph Phillip Franz , Allan Barr Plunkett
发明人： Joseph Phillip Franz , Allan Barr Plunkett
IPC分类号： H02P21/00 , B60L9/16 , H02K17/30 , H02P21/10 , H02P27/04 , H02P27/06 , H02P5/34
CPC分类号： B60L15/025 , B60L11/1803 , B60L9/16 , H02K17/30 , H02P21/10 , H02P27/048 , H02P2207/01 , H02P27/047 , Y02T10/643 , Y02T10/7005 , Y02T10/7258
摘要： A flux sensing coil is installed in each phase of the motor stator, and the resulting induced voltages represent the rate of change of air gap flux in that phase. The output voltage signals are integrated, rectified and summed to obtain an average motor flux signal which is in turn applied to vary the voltage to the motor in such a manner as to maintain a substantially constant motor flux level. In this way control errors due to motor parameter changes are eliminated and the flux margin normally required in motor design is reduced to achieve a more efficient utilization of the motor.
摘要翻译：磁通感测线圈安装在电动机定子的每个相中，并且所得到的感应电压表示该相位中气隙磁通的变化率。输出电压信号被积分，整流和求和以获得平均电动机磁通信号，该平均电动机磁通信号又被施加以改变电动机的电压，以便保持基本上恒定的电动机通量水平。以这种方式，消除了由于电动机参数变化引起的控制误差，并且减小了电动机设计中通常所需的磁通裕度，以实现电动机的更有效利用。

2. 发明授权

US5909098A Downhole pumping system with variable speed pulse-width modulated inverter coupled to electrical motor via non-gap transformer 失效
标题翻译：具有变速脉冲宽度调制逆变器的井下泵送系统通过非间隙变压器耦合到电动机
公开(公告)号：US5909098A
公开(公告)日：1999-06-01
申请号：US995712
申请日：1997-12-22
申请人： Karl Frank Konecny , Allan Barr Plunkett , Kelly Ray Packard , Jacqueline Rae Akerson
发明人： Karl Frank Konecny , Allan Barr Plunkett , Kelly Ray Packard , Jacqueline Rae Akerson
IPC分类号： H02P27/08 , A02P5/28
CPC分类号： H02P27/08
摘要： An improved downhole pumping system that employs a variable speed PWM inverter and a non-gap transformer to drive an induction motor over a range of different speeds, without saturating the transformer. The variable speed PWM inverter provides a rectangular PWM signal that may be varied according to inputs from a controller to adjust the speed of the motor. The PWM inverter is electrically connected to the transformer, and the transformer is electrically attached to the motor via cables, which may be lengthy in downhole applications. The motor may be started by ramping flux producing current to a first preset value at a low frequency, then ramping torque producing current to a second preset value. If a flux measurement indicates the motor has stalled, the second preset value is increased, and the routine is restarted. Otherwise, if no stall has occurred, the motor's speed is ramped to the desired value. Ongoing operation of the motor is managed by a drive routine, which generates triangular and sinusoidal signals based upon a desired chopping frequency, as well as a desired driving frequency of the motor. A sine-triangle comparison is performed upon these signals to yield three rectangular PWM signals, which are used to control the inverter.
摘要翻译：改进的井下泵送系统，其使用可变速PWM逆变器和非间隙变压器来驱动感应电动机在不同速度的范围内，而不使变压器饱和。变频PWM逆变器提供矩形PWM信号，可以根据控制器的输入来改变电机速度。 PWM逆变器电连接到变压器，并且变压器通过电缆电连接到电机，电缆可能在井下应用中漫长。马达可以通过以低频锐化产生电流到第一预设值，然后将产生电流的斜坡扭矩转到第二预设值来启动。如果磁通量测量指示电机停转，则第二预设值增加，重新启动程序。否则，如果没有发生失速，则电机的速度将变为所需的值。电动机的正在进行的操作由驱动程序进行管理，驱动程序根据期望的斩波频率以及电动机的期望的驱动频率产生三角和正弦信号。对这些信号进行正弦三角比较，得到三个矩形PWM信号，用于控制逆变器。

3. 发明授权

US4090119A Torque analog of a series wound DC traction motor 失效
标题翻译：一系列绕组直流牵引电机的扭矩模拟
公开(公告)号：US4090119A
公开(公告)日：1978-05-16
申请号：US714080
申请日：1976-08-12
申请人： Robert James Griffith , Allan Barr Plunkett
发明人： Robert James Griffith , Allan Barr Plunkett
IPC分类号： B60L15/32 , H02P5/00 , H02P7/00
CPC分类号： B60L15/32 , B60L2200/26 , Y02T10/7258
摘要： Apparatus for electronically simulating the response of a direct current traction motor to predetermined operating states whereby there is provided a resultant signal representative of the torque that would be produced by an actual motor operating in the prescribed states. The apparatus calculates E per RPM for the simulated motor from measured values of available armature voltage and armature velocity. A function generator thereafter converts the E per RPM signal to a signal representative of the motor field current based upon known values for the simulated motor. The field current signal is converted to an armature current signal by a circuit which responds to the motor commanded state of field weakening to compute the instantaneous ratio of armature current to field current under the commanded conditions and thereafter multiplies the field current signal by that ratio to obtain a signal representative of armature current. Multiplication of the armature current signal by the E per RPM signal then yields a signal representative of the torque which would be developed by the simulated motor.
摘要翻译：用于将直流牵引电动机的响应电动地模拟到预定操作状态的装置，由此提供表示由处于规定状态的实际电动机产生的转矩的合成信号。该装置根据可用的电枢电压和电枢速度的测量值来计算模拟电动机的每RPM的E。此后，函数发生器基于模拟电动机的已知值，将每RPM信号的E转换为表示电动机励磁电流的信号。励磁电流信号通过响应于电动机指令的弱磁状态的电路转换为电枢电流信号，以计算在指令条件下电枢电流与励磁电流的瞬时比例，然后将励磁电流信号乘以该比率获得代表电枢电流的信号。电枢电流信号乘以E / RPM信号，然后产生代表由模拟电动机开发的转矩的信号。

4. 发明授权

US4047083A Adjustable speed A-C motor drive with smooth transition between operational modes and with reduced harmonic distortion 失效
标题翻译：可调速A-C电机驱动，在运行模式之间平滑过渡，减少谐波失真
公开(公告)号：US4047083A
公开(公告)日：1977-09-06
申请号：US664951
申请日：1976-03-08
申请人： Allan Barr Plunkett
发明人： Allan Barr Plunkett
IPC分类号： H02P21/00 , H02M7/48 , H02M7/527 , H02P27/04 , H02P27/08 , H02M1/08
CPC分类号： H02M7/527 , H02M7/483
摘要： Alternating voltage for energizing an adjustable speed a-c motor is derived from unipolarity input voltage by means of electric power inverting apparatus comprising at least one pair of alternately conducting controllable electric valves. The conducting states of these valves are periodically switched by control means responsive to frequency and amplitude command signals, whereby the frequency and the amplitude of the fundamental component of the alternating voltage are varied as functions of the respective command signals. The control means includes means for implementing a triangle interception mode of pulse width modulation (PWM) of the alternating voltage so long as the amplitude command signal does not exceed a predetermined reference value (which is less than 1.0 per unit) and the speed of the motor does not exceed a predetermined reference speed, and the control means additionally includes means for implementing a "transition" PWM mode of operation whenever the amplitude command signal exceeds its reference value or the motor speed exceeds said reference speed. As disclosed herein the transition PWM mode implementing means is a dual d-c level set scheme in which the lower level is varied as a function of the higher level so as to minimize selected harmonics of the alternating voltage and the higher level is varied as a function of the amplitude command signal thereby to vary the amplitude of the fundamental voltage component, and means is provided for smoothly transitioning to a square wave mode of operation as the amplitude command signal approaches 1.0 per unit.
摘要翻译：用于激励可调速度a-c电动机的交流电压是通过包括至少一对交替导电的可控电动阀的电力逆变装置从单极性输入电压得到的。这些阀的导通状态通过响应于频率和幅度指令信号的控制装置周期性地切换，由此交变电压的基波分量的频率和幅度作为各个指令信号的函数而变化。控制装置包括用于实现交变电压的脉冲宽度调制（PWM）的三角截止模式的装置，只要幅度指令信号不超过预定的参考值（其小于每单位1.0）和速度电动机不超过预定的参考速度，并且控制装置另外包括当幅度指令信号超过其参考值或电动机速度超过所述参考速度时实现“转换”PWM操作模式的装置。如本文所公开的，转换PWM模式实现装置是双直流电平集合方案，其中较低电平作为较高电平的函数而变化，以便最小化交流电压的选定谐波，并且较高电平作为振幅指令信号从而改变基波电压分量的振幅，并且提供装置用于平滑地转换到方波操作模式，因为幅度指令信号接近每单位1.0。

5. 发明授权

US4044284A Alternating current motor control method and system 失效
标题翻译：交流电机控制方法和系统
公开(公告)号：US4044284A
公开(公告)日：1977-08-23
申请号：US605847
申请日：1975-08-19
申请人： Allan Barr Plunkett , John Douglas D'Atre
发明人： Allan Barr Plunkett , John Douglas D'Atre
IPC分类号： H02P21/10 , H02P5/40
CPC分类号： H02P21/10
摘要： A new and improved motor control method and system wherein the frequency of the rotating electro-magnetic flux produced in an alternating current machine, is sensed and compared to a desired value of machine flux frequency to derive an output error control signal. The output error control signal is then applied to control the frequency of the alternating current supplied to the machine in a direction and by an amount necessary to zero any difference in the sensed frequency and the desired frequency of machine flux. In preferred embodiments the actual value of the electromagnetic flux produced across the rotor-stator gap of the motor, is sensed and used as the controlling criterion in the motor control system. The magnitude of the alternating current supplied to the motor is separately controlled in accordance with some other predetermined motor operating characteristics such as motor torque, load current, etc.
摘要翻译：一种新的改进的电机控制方法和系统，其中检测在交流电机中产生的旋转电磁通量的频率，并将其与机器通量频率的期望值进行比较以导出输出误差控制信号。然后施加输出误差控制信号以控制提供给机器的交流电流的频率，并且以所需的量来控制感测频率和期望频率的机器通量的任何差异。在优选实施例中，电动机的转子 - 定子间隙产生的电磁通量的实际值被感测并用作电动机控制系统中的控制标准。根据电动机转矩，负载电流等一些其他预定的电动机工作特性，单独控制供给电动机的交流电流的大小。

6. 发明授权

US4093900A Dynamic brake blending for an inverter propulsion system 失效
标题翻译：用于变频器推进系统的动态制动器混合
公开(公告)号：US4093900A
公开(公告)日：1978-06-06
申请号：US713491
申请日：1976-08-11
申请人： Allan Barr Plunkett
发明人： Allan Barr Plunkett
IPC分类号： H02P3/22 , B60L7/22 , H02P3/18
CPC分类号： B60L7/003 , B60L7/22 , H02P3/18 , B60L2200/26 , B60L2220/12 , Y02T10/642
摘要： The stator terminals of an adjustable speed a-c induction motor are connected to a source of d-c electric power by means of an inverter, and a system is provided for blending both dynamic and regenerative electrical braking of the motor whenever it decelerates. The brake blending system comprises a plurality of braking resistors respectively coupled by a corresponding switch in parallel with the power source. The switches are controlled by a control circuit which responds to motor terminal voltage, motor angular velocity and the difference between the commanded and actual motor torques to determine the additional current which the motor could regenerate without exceeding commanded parameters. When the additional current corresponds to that current which can be absorbed by adding an additional stage of braking resistance, the control circuit actuates a switch to add a stage of dynamic brake resistance. The control circuit also monitors the voltage of the source and removes braking resistance in steps to maintain source voltage within selected limits in order to maximize the current fed to the power source and thus maximize regenerated energy. In an alternate embodiment the control circuit determines the admittance of the source and utilizes the admittance to maintain source voltage substantially constant by removal of dynamic brake resistance in order to force more regenerative current to the source.
摘要翻译：可变速a-c感应电动机的定子端子通过逆变器连接到d-c电源，并且提供用于混合电动机的动态和再生电制动的系统，只要其减速。制动器共混系统包括分别由与电源并联的相应开关耦合的多个制动电阻器。开关由控制电路控制，该控制电路响应于电机端子电压，电机角速度以及指令和实际电机转矩之间的差异，以确定电机可以在不超过指令参数的情况下再生的附加电流。当附加电流对应于可以通过增加额外的制动电阻级来吸收的电流时，控制电路致动开关以增加动态制动电阻的级。控制电路还监控电源的电压，并逐步消除制动电阻，以将电源电压维持在选定的限制范围内，以便最大化馈送到电源的电流，从而最大化再生能量。在替代实施例中，控制电路确定源的导纳，并通过去除动态制动电阻来利用导纳来维持源电压基本恒定，以便迫使更多的再生电流到源。

7. 发明授权

US4075538A Adaptive acceleration responsive system 失效
标题翻译：自适应加速系统
公开(公告)号：US4075538A
公开(公告)日：1978-02-21
申请号：US687832
申请日：1976-05-19
申请人： Allan Barr Plunkett
发明人： Allan Barr Plunkett
IPC分类号： G01P15/00 , B60L3/10 , B60T8/62 , G01P15/16 , H02P5/06
CPC分类号： B60L3/10 , B60L2200/26 , Y02T10/7258
摘要： A method and apparatus for rapidly detecting acceleration variations in a moving object by monitoring the instantaneous velocity of the object. A signal representative of instantaneous velocity is operated on to derive signals representative of average acceleration, instantaneous acceleration and predicted velocity. The average acceleration and instantaneous acceleration signals are compared to determine acceleration changes. In a preferred embodiment the invention is applied as a wheel slip/slide detector in a traction vehicle and a signal generated when the instantaneous acceleration deviates from the average acceleration by a predetermined magnitude is utilized as a wheel slip/slide signal to implement corrective action to the power control system of the vehicle. Upon generation of the wheel slip/slide signal, calculation of average acceleration is inhibited to prevent its influence by the sudden acceleration change. The predicted velocity signal, which is dependent upon the average acceleration signal, is compared with the instantaneous velocity signal to determine when the vehicle has recovered from the wheel slip/slide condition.

8. 发明授权

US4044285A Method and apparatus for controlling variable speed, controlled current induction motor drive systems 失效
公开(公告)号：US4044285A
公开(公告)日：1977-08-23
申请号：US605848
申请日：1975-08-19
申请人： Allan Barr Plunkett , John Douglas D'Atre
发明人： Allan Barr Plunkett , John Douglas D'Atre
IPC分类号： H02P21/10 , H02P5/40
CPC分类号： H02P21/10 , H02P2207/01
摘要： A new induction motor control method and system utilizes one more electric power inverters each supplying a separate induction motor with alternating current excitation power. The respective inverters preferably comprise auto-sequential commutated controlled current inverters. Direct current is supplied to each inverter in the system from a common direct current power supply preferably comprising a phase controlled rectifier circuit with individual current smoothing inductors connected in the direct current link to each power inverter for isolation purposes. A common operator controlled power level control module is provided for controlling the magnitude of the output current supplied from the common phase controlled rectifier to all of the inverters in parallel. Respective motor flux sensing means are provided for each induction motor for deriving individual feedback control signals representative of the flux developed by the respective induction motors. The flux feedback signal is summed with an input command value of a flux control signal in a suitable summing circuit, and the error signal is supplied through a suitable compensating circuit for regulating the flux level of the respective induction motors by individually controlling the frequency of the excitation current supplied to the stator windings of the motor by its associated inverter. In a preferred embodiment the actual electro-magnetic flux produced across the induction motor stator-rotor gap is sensed and fed back to the summing circuit for control purposes. This sensed actual value of motor flux signal also is utilized to derive an actual value of torque feedback control signal that is employed in controlling the magnitude of the direct current supplied by the common phase controlled rectifier to all of the inverters in parallel. It is also preferred to employ a phase lock-loop converter as the compensating circuit in the frequency control.

9. 发明授权

US5844397A Downhole pumping system with variable speed pulse width modulated inverter coupled to electrical motor via non-gap transformer 失效
标题翻译：具有变速脉冲宽度调制逆变器的井下泵送系统通过非间隙变压器耦合到电动机
公开(公告)号：US5844397A
公开(公告)日：1998-12-01
申请号：US643128
申请日：1996-05-02
申请人： Karl Frank Konecny , Allan Barr Plunkett , Kelly Ray Packard , Jacqueline Rae Akerson
发明人： Karl Frank Konecny , Allan Barr Plunkett , Kelly Ray Packard , Jacqueline Rae Akerson
IPC分类号： E21B43/12 , F04D13/06 , F04D15/00 , A02P5/28
CPC分类号： F04D13/06 , E21B43/128 , F04D15/0066
摘要： An improved downhole pumping system that employs a variable speed PWM inverter and a non-gap transformer to drive an induction motor over a range of different speeds, without saturating the transformer. The variable speed PWM inverter provides a rectangular PWM signal that may be varied according to inputs from a controller to adjust the speed of the motor. The PWM inverter is electrically connected to the transformer, and the transformer is electrically attached to the motor via cables, which may be lengthy in downhole applications. The motor may be started by ramping flux producing current to a first preset value at a low frequency, then ramping torque producing current to a second preset value. If a flux measurement indicates the motor has stalled, the second preset value is increased, and the routine is restarted. Otherwise, if no stall has occurred, the motor's speed is ramped to the desired value. Ongoing operation of the motor is managed by a drive routine, which generates triangular and sinusoidal signals based upon a desired chopping frequency, as well as a desired driving frequency of the motor. A sine-triangle comparison is performed upon these signals to yield three rectangular PWM signals, which are used to control the inverter.
摘要翻译：改进的井下泵送系统，其使用可变速PWM逆变器和非间隙变压器来驱动感应电动机在不同速度的范围内，而不使变压器饱和。变频PWM逆变器提供矩形PWM信号，可以根据控制器的输入来改变电机速度。 PWM逆变器电连接到变压器，并且变压器通过电缆电连接到电机，电缆可能在井下应用中漫长。马达可以通过以低频锐化产生电流到第一预设值，然后将产生电流的斜坡扭矩转到第二预设值来启动。如果磁通量测量指示电机停转，则第二预设值增加，重新启动程序。否则，如果没有发生失速，则电机的速度将变为所需的值。电动机的正在进行的操作由驱动程序进行管理，驱动程序根据期望的斩波频率以及电动机的期望的驱动频率产生三角和正弦信号。对这些信号进行正弦三角比较，得到三个矩形PWM信号，用于控制逆变器。

10. 发明授权

US4023083A Torque regulating induction motor system 失效
标题翻译：扭矩调节感应电动机系统
公开(公告)号：US4023083A
公开(公告)日：1977-05-10
申请号：US568120
申请日：1975-04-14
申请人： Allan Barr Plunkett
发明人： Allan Barr Plunkett
IPC分类号： H02P21/00 , H02P21/10 , H02P27/04 , H02P5/40
CPC分类号： H02P21/10
摘要： A torque regulating alternating current induction motor control system comprising a motor flux sensing coil arrangement mounted on the induction motor stator for sensing the actual flux produced across the rotor-stator air gap of the motor and deriving a motor flux voltage signal proportional to the actual motor flux. An integrating circuit integrates the voltage signal to obtain a feedback sensed actual motor flux signal representative of the actual air gap flux. An actual torque feedback circuit converts the actual air gap flux and stator current signal to an actual value of torque feedback control signal. A first feedback control loop is responsive to the actual torque feedback control signal and a command value of torque signal and controls the frequency of operation of a power converter supplying the induction motor. A second feedback control loop also responsive to the feedback sensed actual value of flux converts the flux signal into a (V/Hz) voltage control signal for maintaining a substantially controlled value of rotor-stator air gap flux level. The first and second feedback control loops are interconnected and coact to maintain operation of the induction motor at a controlled value of torque.The actual torque feedback circuit includes a flux signal processing circuit for deriving from the output motor flux signals respective direct and quadrature axes flux signal components and combines these signals with direct and quadrature axes motor current signal components in multiplier circuits for multiplying the quadrature axis flux signal by the direct axis motor current signal and for multipyling the direct axis flux signal by the quadrature axis motor current signal. A summing circuit sums the two products to derive an output actual value of torque developd by the induction motor in accordance with the expression T=K(.psi..sub.d i.sub.qs -.psi..sub.q i.sub.ds). The system is designed primarily for use with a three-phase, variable voltage, variable speed, alternating current induction motor intended for traction motor drives and makes available a new and novel actual torque measuring arrangement for use in such systems.
摘要翻译：一种扭矩调节交流感应电动机控制系统，包括安装在感应电动机定子上的电动机磁通感测线圈装置，用于感测在电机的转子 - 定子气隙两端产生的实际磁通，并导出与实际电动机成比例的电动机通量电压信号助焊剂积分电路对电压信号进行积分，以获得表示实际气隙磁通的反馈感测实际电机通量信号。实际的转矩反馈电路将实际气隙磁通和定子电流信号转换为扭矩反馈控制信号的实际值。第一反馈控制回路响应于实际转矩反馈控制信号和转矩信号的指令值，并且控制供应感应电动机的功率转换器的操作频率。响应于反馈感测的磁通实际值的第二反馈控制回路将通量信号转换成（V / Hz）电压控制信号，以维持转子 - 定子气隙通量水平的基本上受控的值。第一和第二反馈控制回路互连并且共同作用以将感应电动机的操作保持在受控的扭矩值。

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