公开(公告)号：US4366427A

公开(公告)日：1982-12-28

申请号：US142656

申请日：1980-04-22

Applicant: Loren H. Walker ,  John H. Cutler

Inventor： Loren H. Walker ,  John H. Cutler

IPC: H02P27/06 ,  H02P23/00 ,  H02P23/06 ,  H02P5/40

CPC classification number: H02P23/07

Abstract: A controlled current inverter system forms the basis of an AC motor drive system for furnishing a motor load 22 with a variable frequency, variable magnitude AC current from a thyristor controlled DC to AC inverter 16 which is supplied current from a thyristor controlled AC to DC converter 10 by way of a DC link including an inductor 14. The frequency of the inverter is controlled by means of a control circuit including a voltage controlled oscillator 18. In the event that the converter 10 operates in such manner as to place a short circuit across the DC link 14 during a regenerative mode of operation of the motor 22, apparatus 36 is shown and described and a method is disclosed for providing a momentary advance gating of the inverter 16 which causes the motor 22 to shift from the existing regenerative mode toward a motoring mode and thereby quench any build-up of excessive converter-inverter circulating currents.

Abstract translation: 控制电流逆变器系统构成交流电动机驱动系统的基础，用于为电动机负载22提供从可控硅控制的直流到交流逆变器16的可变频率，可变大小的交流电流，该电流从可控硅控制的交流电转换到直流转换器 通过包括电感器14的DC链路，通过包括压控振荡器18的控制电路来控制逆变器的频率。在转换器10以这样的方式操作以使短路跨越的情况下 在电动机22的再生操作模式期间的DC链路14，装置36被示出和描述，并且公开了一种用于提供逆变器16的瞬时提前门控的方法，其使得电动机22从现有的再生模式向着 驱动模式，从而猝灭过大的变流器 - 逆变器循环电流的积聚。

公开(公告)号：US4311951A

公开(公告)日：1982-01-19

申请号：US32899

申请日：1979-04-24

Applicant: Loren H. Walker ,  John H. Cutler

Inventor： Loren H. Walker ,  John H. Cutler

IPC: H02P1/26 ,  H02P3/18 ,  H02P27/06

CPC classification number: H02P27/06

Abstract: Apparatus and method for high slip operation of an AC electric motor at substantially zero rotation and substantially zero torque in an AC electric motor drive system is disclosed. The electric motor produces a rotation in response to an outgoing signal, such as a drive current, of variable magnitude and frequency supplied by the drive system. An idle control signal is furnished when the drive system is in a substantially zero rotation and substantially zero torque state, where the frequency of the current is approximately zero. The idle control signal causes substantially simultaneously an adjustment of the magnitude of the current to a predetermined magnitude level and a rapid raising of the frequency of the current to a higher frequency value to produce per-unit slip s=(n.sub.1 -n)/n.sub.b greater than 0.1, where n.sub.1 is the synchronous rotation of the stator field of the motor, n is the rotation of the rotor of the motor, and n.sub.b is the synchronous speed of the stator field at motor rated rpm. The adjustment in the magnitude and the rapid increase in the frequency of the current causes the motor to produce substantially zero rotation and substantially zero torque because the motor is operating in the high slip region of its torque-rotation curve. The apparatus and method of the present invention allows the motor to accelerate rapidly on command from the substantially zero rotation and substantially zero torque high slip mode.

Abstract translation: 公开了一种在交流电动机驱动系统中基本为零旋转且基本为零转矩的交流电动机的高滑动操作的装置和方法。 电动机响应于由驱动系统提供的可变的幅度和频率的输出信号（例如驱动电流）产生旋转。 当驱动系统处于基本为零旋转且基本为零转矩状态时，提供空转控制信号，其中电流的频率近似为零。 空转控制信号基本上同时导致电流幅度调整到预定幅度电平，并将电流频率快速提高到较高频率值，以产生单位滑差s =（n1-n）/ nb 大于0.1，其中n1是电动机的定子磁场的同步旋转，n是电动机的转子的旋转，nb是电动机额定转速下定子磁场的同步转速。 由于电动机在其转矩 - 转动曲线的高滑动区域中工作，电流的大小调整和电流频率的快速增加使得电动机产生基本为零的旋转和基本为零的转矩。 本发明的装置和方法允许电动机从基本为零的旋转和基本上为零的转矩高滑移模式的命令快速加速。

公开(公告)号：US4247890A

公开(公告)日：1981-01-27

申请号：US32853

申请日：1979-04-24

Applicant: John H. Cutler ,  Loren H. Walker

Inventor： John H. Cutler ,  Loren H. Walker

IPC: H02M7/757 ,  H02M7/525 ,  H02M7/66 ,  H02M7/515

CPC classification number: H02M7/525

Abstract: An inverter system for supplying variable frequency alternating current power to a load such as an a.c. motor includes an inverter bridge of controlled rectifiers which are selectively rendered conductive by the application thereto of gating pulses. The gating signals result from a control circuit which includes a voltage controlled oscillator responsive to a command signal having a d.c. magnitude and polarity which in turn outputs a signal having a substantially saw-tooth wave shape. Comparator circuits responsive to the saw-tooth wave shape signal provide timing pulses and direction signals which are applied to a shift register to effect movement of the register contents the extant status of which initiates the production of the gating signals for rendering the semiconductors conductive.

Abstract translation: 一种逆变器系统，用于向例如a.c.的负载提供可变频率的交流电力。 电动机包括受控整流器的逆变器桥，其通过其施加脉冲的选择性地被选择性地导通。 门控信号由控制电路产生，该控制电路包括响应于具有直流电的指令信号的压控振荡器。 大小和极性依次输出具有大致锯齿波形的信号。 响应于锯齿波形信号的比较器电路提供定时脉冲和方向信号，该定时脉冲和方向信号被施加到移位寄存器以实现寄存器内容的移动，其存在状态启动门控信号的产生以使半导体导通。

公开(公告)号：US4183081A

公开(公告)日：1980-01-08

申请号：US957108

申请日：1978-11-02

Applicant: John H. Cutler ,  Loren H. Walker

Inventor： John H. Cutler ,  Loren H. Walker

IPC: H02M5/45 ,  H02P13/24 ,  H02M1/06

CPC classification number: H02M5/4505

Abstract: A controlled rectifier inverter system of the type in which the inverter circuit has capacitors across which voltages are developed as a function of the current output of the inverter, such voltages being utilized to commutate the rectifiers of the inverter circuit, includes means to limit the magnitude of the rise in output current between successive commutations of the rectifiers of a group to prevent the achievement of a current in excess of that which can be commutated by the voltages on the capacitors.

Abstract translation: 一种可控整流逆变器系统，其中逆变器电路具有作为逆变器的电流输出的函数的显影电压的电容器，用于对逆变器电路的整流器进行换向的电压包括限制幅度的装置 在组合的整流器的连续换向之间的输出电流的上升，以防止实现超过可由电容器上的电压换向的电流。

公开(公告)号：US4589050A

公开(公告)日：1986-05-13

申请号：US689418

申请日：1985-01-07

Applicant: John H. Cutler ,  Loyal N. Stallard

Inventor： John H. Cutler ,  Loyal N. Stallard

IPC: H02H7/12 ,  H02M7/162 ,  H02H3/26

CPC classification number: H02M7/1623 ,  H02H7/1216

Abstract: Each of the three phase power source voltages coupled to a three phase (3.0.) thyristor power converter are respectively half-wave rectified to provide both positive and negative voltages. Signals representing the largest positive rectified voltage and the smallest positive rectified voltage are developed as are signals representing the largest negative rectified voltage and the smallest negative rectified voltage. Using signals from both the positive and negative rectified voltages, at least one comparison is made to determine a difference which, when in excess of a predetermined limit, effects a logic signal to provide an indication that an asymmetrical fault exists either phase to neutral or phase to phase across the power converter and the power lines connecting the converter to a polyphase alternating current (AC) source. Following a suitable delay, protective action is initiated, which action comprises either phasing back of gating to the converter thyristors and/or tripping of a circuit breaker or contactor which operates to interrupt the supply of AC power to the converter.

Abstract translation: 耦合到三相（30）晶闸管功率转换器的三相电源电压中的每一个分别被半波整流以提供正电压和负电压。 表示最大正整流电压和最小正整流电压的信号是表示最大负整流电压和最小负整流电压的信号。 使用来自正整流电压和负整流电压的信号，进行至少一个比较以确定差异，当差超过预定极限时，会产生逻辑信号以提供非对称故障存在于相位到中性或相位 以将功率转换器和将转换器连接到多相交流（AC）源的电力线相位。 在适当的延迟之后，启动保护动作，该动作包括将选通器的相位相回到转换器晶闸管和/或断路器或接触器的跳闸，该断路器或接触器操作以中断向转换器提供AC电力。

公开(公告)号：US4451770A

公开(公告)日：1984-05-29

申请号：US493405

申请日：1983-05-11

Applicant: Fred H. Boettner ,  John H. Cutler ,  Loren H. Walker

Inventor： Fred H. Boettner ,  John H. Cutler ,  Loren H. Walker

IPC: G01R31/34 ,  H02P23/06 ,  H02P3/18

CPC classification number: H02P23/06 ,  G01R31/343

Abstract: A scheme for determining the stator resistance of an alternating current motor includes the determination of the actual flux of the motor through the sensing of motor voltage and motor current. The motor current is also utilized to develop a signal representing the anticipated motor flux which will result from that current. These two flux signals are combined to develop a flux error signal, the polarity of which is determined by whether the motor is in the motoring or regenerative mode of operation, which in turn is integrated to give the signal representing the motor stator resistance. Additionally, when the motor changes mode of operation, there is provided a step function which assures a motor stator resistance value being used which insures control stability.

Abstract translation: 用于确定交流电动机的定子电阻的方案包括通过感测电动机电压和电动机电流来确定电动机的实际磁通量。 电动机电流也用于开发表示由该电流产生的预期电动机通量的信号。 这两个通量信号被组合以产生磁通误差信号，其极性由电动机是否处于电动或再生运行模式来确定，其又被积分以给出表示电动机定子电阻的信号。 此外，当电动机改变操作模式时，提供了确保使用的电机定子电阻值以确保控制稳定性的阶梯功能。

公开(公告)号：US4441064A

公开(公告)日：1984-04-03

申请号：US332180

申请日：1981-12-18

Applicant: John H. Cutler ,  Loren H. Walker

Inventor： John H. Cutler ,  Loren H. Walker

IPC: H02P21/00 ,  H02P27/04 ,  H02P5/40

CPC classification number: H02P21/22

Abstract: A twelve-pulse control current inverter system having two six-pulse powered channels connected to a source of variable dc current is selectively operable to control either a three-phase motor or a double three-phase motor. Signals representing the phase currents of each of the two channels are combined with direct and quadrature motor flux signals, the latter signals being shifted in phase in the case of the double three-phase motor, to produce torque signals representing the motor torque produced by each of the two powered channels. These two torque signals are then combined to provide a total torque signal which, in turn, is utilized in the development of an angle signal for the control of the two current inverters.

Abstract translation: 具有连接到可变直流电流源的两个六脉冲供电通道的十二脉冲控制电流逆变器系统可选择性地操作以控制三相电动机或双三相电动机。 表示两个通道中的每一个的相电流的信号与直接和正交电动机磁通信号组合，后两个信号在双三相电动机的情况下相位移位，以产生表示由每个电动机产生的电动机转矩的转矩信号 的两个电源通道。 然后将这两个扭矩信号组合以提供总转矩信号，该转矩信号又用于开发用于控制两个电流逆变器的角度信号。

公开(公告)号：US4364007A

公开(公告)日：1982-12-14

申请号：US142782

申请日：1980-04-22

Applicant: John H. Cutler ,  Willard B. Jarvinen ,  Loren H. Walker

Inventor： John H. Cutler ,  Willard B. Jarvinen ,  Loren H. Walker

IPC: G01R27/16 ,  G01R31/02

CPC classification number: G01R31/021 ,  G01R27/16

Abstract: A detection system for detecting unintentional impedances between the power conductors and a first node of either a power conversion circuit or a load, the first node typically being an earth ground. The circuit has power level lines utilizing a wye-connected line filter network which has equal impedance values for each leg of the line filter and which defines a first node at the common connection thereof. A different impedance network is also connected in wye-fashion to the power level lines and defines a second node at the common connection thereof. Each impedance leg of the impedance network is also equal in impedance value whereby the second node normally has the same potential as the first node. The potential difference between the first and second nodes is frequency compensated to produce a system output signal indicative of a predetermined value of current in unintentional impedance between any of the power conductors and the first node.

Abstract translation: 一种用于检测电力导体与功率转换电路或负载的第一节点之间的无意阻抗的检测系统，第一节点通常是接地。 该电路具有利用连接有紫外线的滤波器网络的功率电平线路，其对线路滤波器的每个支路具有相等的阻抗值，并且在其公共连接处限定第一节点。 不同的阻抗网络也以白色方式连接到功率电平线并且在其公共连接处限定第二节点。 阻抗网络的每个阻抗支路的阻抗值也相等，从而第二节点通常具有与第一节点相同的电位。 第一和第二节点之间的电位差被频率补偿以产生指示任何电力导体和第一节点之间无意阻抗的电流的预定值的系统输出信号。

公开(公告)号：US4281276A

公开(公告)日：1981-07-28

申请号：US32937

申请日：1979-04-24

Applicant: John H. Cutler ,  Loren H. Walker

Inventor： John H. Cutler ,  Loren H. Walker

IPC: H02P27/04 ,  H02P27/06 ,  H02P7/42 ,  H02P7/58

CPC classification number: H02P23/0027 ,  H02P27/06

Abstract: Disclosed is an AC motor drive system having a variable frequency, variable magnitude AC current supplied from a controlled inverter coupled to a variable DC current source in the form of a converter by way of a DC link including an inductor. The AC motor load is controlled so as to have dual modes of operation in order to optimize torque at any speed which can be produced within the voltage and current limitations of the variable frequency power source. The first mode comprises a constant slip or constant angle mode for operating speeds up to the corner point speed which is defined as the speed at which the motor voltage at full torque matches the maximum voltage the variable frequency inverter coupled thereto can provide. Thereafter, the system enters the second mode by automatically shifting to a constant horsepower variable slip or changing angle mode for operating speeds beyond the corner point speed.

Abstract translation: 公开了一种交流电动机驱动系统，其具有通过包括电感器的直流链路从转换器形式的耦合到可变直流电流源的受控逆变器提供的可变频率可变量级AC电流。 控制交流电动机负载以具有双重工作模式，以便在可变频率电源的电压和电流限制内可产生的任何速度下优化转矩。 第一模式包括恒定滑差或恒定角度模式，用于操作速度高达转角点速度，其被定义为全扭矩处的电动机电压与耦合到其的可变频逆变器可提供的最大电压匹配的速度。 此后，系统通过自动转换到恒定功率可变滑移或变化角度模式进入第二模式，以使运行速度超过角点速度。

公开(公告)号：US4280085A

公开(公告)日：1981-07-21

申请号：US32856

申请日：1979-04-24

Applicant: John H. Cutler ,  Loren H. Walker

Inventor： John H. Cutler ,  Loren H. Walker

IPC: H02P21/00 ,  H02P27/04 ,  H02P27/06 ,  H02P5/34 ,  H02P5/36

CPC classification number: H02P27/06

Abstract: An apparatus and method for providing signals indicative of the magnitude and angular position of the DC motor flux of an AC induction motor is disclosed. The AC induction motor provides controllable rotation and torque in accordance with a drive current of variable magnitude and frequency. A first signal is provided proportional to the rate of change of the flux of the motor. A second signal is supplied proportional to the magnitude of the drive current. A flux signal is generated proportional to the integral of the first signal when the frequency of the output signal is above a preselected value and which is proportional to the second signal when the frequency of the output signal is below the preselected value. A representative value for the preselected frequency value is 3 Hertz in a 60 Hertz drive system. The flux signal is effective to control the generation of the drive current. An embodiment of the present invention is shown for the case where the motor is stopped at a predetermined position in accordance with a predetermined conduction state of the inverting supplying the drive current. Additional embodiments are shown for the general cases where the motor can be stopped at any position and where two flux axes or three flux axes are sensed. The present invention is particularly applicable for use in an AC induction motor drive system.

Abstract translation: 公开了一种用于提供表示AC感应电动机的直流电动机通量的大小和角位置的信号的装置和方法。 交流感应电动机根据可变幅度和频率的驱动电流提供可控旋转和转矩。 提供与电动机的通量变化率成比例的第一信号。 提供与驱动电流的大小成比例的第二信号。 当输出信号的频率高于预选值时，当输出信号的频率低于预选值时，通量信号与第一信号的积分成比例，并与第二信号成比例。 在60赫兹驱动系统中，预选频率值的代表值为3赫兹。 通量信号有效地控制驱动电流的产生。 示出了根据提供驱动电流的反相器的预定导通状态将电动机停止在预定位置的情况的本发明的实施例。 示出了其中电动机可以停在任何位置并且感测两个磁通轴或三个磁通轴的一般情况的附加实施例。 本发明特别适用于交流感应电机驱动系统。