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公开(公告)号：US4230979A
公开(公告)日：1980-10-28
申请号：US895189
申请日：1978-04-10
CPC分类号： H02P21/36
摘要： A controlled current inverter system forms the basis of an a.c. motor drive system for furnishing the motor load with a variable frequency, variable magnitude a.c. current from an inverter which is supplied from a variable d.c. current source by way of a d.c. link including an inductor. Torque is the control parameter employed in the system and the motor speed and torque are controlled through the control of motor flux and motor current, by maintaining a controlled ratio between the direct and quadrature motor currents, through separate control paths to the d.c. source and the inverter. A third control path functioning on the difference between the desired and actual motor flux serves as a modifier to the main control paths to improve overall operation and control. Means associated with the basic control paths provide for dynamic braking of the motor.
摘要翻译： 受控电流逆变器系统形成了一个交流电流的基础。 电机驱动系统，用于以可变频率，可变幅度a.c.提供电机负载。 来自变频器供电的电流的电流 目前来源以d.c. 链路包括电感器。 扭矩是系统中使用的控制参数，通过控制电机磁通和电机电流，通过直接和正交电机电流之间的控制比例，通过单独的控制路径到直流电流来控制电机转速和转矩。 源和逆变器。 根据期望的和实际的电动机磁通之间的差异起作用的第三控制路径用作主控制路径的修正器，以改善整体操作和控制。 与基本控制路径相关联的装置提供电动机的动态制动。
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公开(公告)号：US4449087A
公开(公告)日：1984-05-15
申请号：US333933
申请日：1981-12-23
CPC分类号： H02P25/024 , H02P2201/13
摘要： A load commutated inverter synchronous motor drive system wherein a thyristor firing control of the inverter is determined by the amplitude of pesudo flux waveforms which are derived from the integral of the line voltages coupling the inverter to the motor being driven. A firing strategy is provided based on the premise that optimum thyristor firing in a load commutated inverter operating at a leading power factor occurs at a point just below the peak of the forthcoming pseudo flux waveform which point comprises an amount of volt-seconds necessary to effect current commutation plus a nominal safety margin. The determination and control is implemented, preferably, in a software phase lock loop but can, when desirable, be implemented in hardware.
摘要翻译： 一种负载换向的逆变器同步电动机驱动系统，其中逆变器的晶闸管点火控制由从耦合到所驱动的电动机的线路电压的积分导出的pesudo通量波形的幅度确定。 基于这样的前提提供了一种点火策略，即在刚刚低于即将到来的伪通量波形的峰值的点处的负载换向逆变器中以最佳功率因数工作的最佳晶闸管点火发生在该点包括所需的伏秒的量 当前换向加上名义上的安全幅度。 确定和控制优选地在软件锁相环中实现，但是当期望地可以在硬件中实现时。
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3.发明授权Reversible variable frequency oscillator for smooth reversing of AC motor drives 失效可逆变频振荡器，用于交流电机驱动器的平滑反转
公开(公告)号：US4227138A
公开(公告)日：1980-10-07
申请号：US895136
申请日：1978-04-10
申请人： Paul M. Espelage , Loren H. Walker
发明人： Paul M. Espelage , Loren H. Walker
CPC分类号： H02P27/045
摘要： A variable speed ac motor drive such as a controlled current inverter drive with load angle control generates an inverter frequency command signal which at low speed has a large ripple component and a small dc component representing the desired frequency. A variable frequency oscillator is responsive only to the dc component and supplies timing pulses to a ring counter which generates thyristor gating signals in the forward and reverse phase sequence. Smooth reversing over a wide range of torque is realized, and multipulse operation is inherent at low speeds to modulate the inverter output and minimize cogging torque.
摘要翻译： 诸如具有负载角度控制的受控电流逆变器驱动器的可变速度交流电动机驱动器产生逆变器频率指令信号，其在低速时具有大的纹波分量和表示期望频率的小直流分量。 可变频率振荡器仅响应于直流分量，并将定时脉冲提供给环形计数器，该环形计数器在正向和反向相序中产生晶闸管门控信号。 实现了在宽范围的扭矩范围内的平滑反转，并且多脉冲操作在低速下是固有的，以调制逆变器输出并最小化齿槽转矩。
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公开(公告)号：US4475150A
公开(公告)日：1984-10-02
申请号：US372750
申请日：1982-04-28
CPC分类号： H02M5/4505 , H02H7/1216
摘要： A fault protective system for a load commutated inverter motor drive including an AC to DC source side converter coupled from an AC source to a DC to AC load side converter via a DC link circuit and wherein the load side converter supplies AC power of varying magnitude and frequency to the synchronous motor load. A pair of microcomputers interlinked by a common digital memory respectively control the inverters and interface with hardware type sensor means for detecting the occurrence of a plurality of different types of faults. Additionally, a number of stored instructional sets or programs are respectively included in both microcomputers to detect by software means another plurality of faults. The detection of a fault on either side of the link circuit is communicated to the respective computer which subsequently communicates with the other microcomputer to effect a coordinated protective action in response to thyristor cell failures, circuit failures, and abnormal operating conditions. Cell failure faluts include those instances where a thyristor cell actually fails due to an open or short circuit as well as those cases where a cell fails to commutate properly due to firing strategy problems. Cirucit failures include open and short circuits both in the supply line and the motor leads, while abnormal operating conditions involve such things as low line voltage or excessive motor voltage.
摘要翻译： 一种用于负载换向的电动机驱动器的故障保护系统，其包括经由DC链路电路从AC电源耦合到DC至AC负载侧转换器的AC至DC源侧转换器，并且其中所述负载侧转换器提供不同大小的AC电力， 频率同步电机负载。 由公共数字存储器互连的一对微型计算机分别控制逆变器并与硬件型传感器装置进行接口，以检测多种不同类型故障的发生。 另外，两个微型计算机中分别包括多个存储的指令集或程序，以通过软件来检测另外的多个故障。 将链路电路的任一侧的故障的检测通信给相应的计算机，该计算机随后与另一个微型计算机进行通信，以响应于晶闸管电池故障，电路故障和异常操作条件而进行协调的保护动作。 电池故障故障包括由于开路或短路而导致晶闸管电池实际故障的情况，以及由于触发策略问题，电池无法正确换向的情况。 Cirucit故障包括供电线路和电机引线中的开路和短路，而异常工作条件涉及低线路电压或电机电压过大等情况。
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公开(公告)号：US4295086A
公开(公告)日：1981-10-13
申请号：US142696
申请日：1980-04-22
CPC分类号： H02P21/36
摘要： A controlled current inverter motor control system including a controlled source of direct current for supplying a variable frequency inverter by way of a direct current link circuit which includes, within the link circuit, a selectively insertable dynamic braking resistive element. Upon a call for a dynamic braking mode of operation, the source of direct current is short circuited and the normal operational or running control of the motor is discontinued. Special circuitry is provided which then forces a special frequency control of the inverter to thus control the angle between the motor flux and motor current to a prescribed value proportional to the extant value of a motor operating parameter (motor current or motor flux) prior to the insertion of the dynamic braking resistive element into the link circuit.
摘要翻译： 一种受控电流逆变器电动机控制系统，包括受控的直流电源，用于通过直流链路电路提供变频逆变器，所述直流链路电路在链路电路内包括可选择性地插入的动态制动电阻元件。 在呼叫动态制动操作模式时，直流电源短路，电机的正常运行或运行控制停止。 提供特殊电路，然后强制变频器的特殊频率控制，从而将电动机磁通和电动机电流之间的角度控制在与电动机工作参数（电动机电流或电动机通量）之间的现有值成正比的规定值之前 将动态制动电阻元件插入到链路电路中。
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公开(公告)号：US4164015A
公开(公告)日：1979-08-07
申请号：US895188
申请日：1978-04-10
申请人： Paul M. Espelage , Loren H. Walker
发明人： Paul M. Espelage , Loren H. Walker
CPC分类号： H02M7/1623
摘要： A digital firing control circuit is disclosed for controlling the generation of firing pulses for the eight controlled rectifiers (thyristors) in a bridge power converter in five distinct operating modes as well as effecting a smooth continuous transition between modes. The circuit compares and combines a plurality of locally generated time related waveforms according to a predetermined control algorithm in response to an applied analog command voltage to control the d.c. output voltage as well as providing certain protection functions such as end stops or inversion limits. The locally generated time related waveforms comprise sets of square voltage signals generated in accordance with selected cross-overs of the line voltages of the a.c. sources as well as the cross-overs of six firing reference ramp voltage signals separated from each other by 60.degree. and extending 240 electrical degrees. One particular mode of interest exists at relatively low voltage levels wherein the phase leg thyristors are respectively rendered conductive for a period of 60.degree. in the range of firing angles from 90.degree. to 120.degree. with the neutral leg thyristors being fired 60.degree. after the phase thyristor firing, or at a firing angle of 150.degree. to 180.degree. .
摘要翻译： 公开了一种数字点火控制电路，用于以五种不同的操作模式控制桥式功率转换器中的八个可控整流器（晶闸管）的发射脉冲的产生，以及实现模式之间的平滑连续转变。 该电路响应于所施加的模拟命令电压，根据预定的控制算法比较和组合多个局部生成的时间相关波形，以控制直流 输出电压以及提供某些保护功能，例如端点停止或反转限制。 本地产生的时间相关波形包括根据交流电的交流产生的平方电压信号的集合。 来源以及六个点火参考斜坡电压信号的交叉，彼此间隔60°并延伸240电度。 一个特定的感兴趣的模式存在于相对低的电压水平，其中相位支路晶闸管分别在90°至120°的触发角度范围内导通60°的周期，中性支路晶闸管在相位之后60°发射 晶闸管烧制，或在150°至180°的点火角。
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公开(公告)号：US4763059A
公开(公告)日：1988-08-09
申请号：US65529
申请日：1987-06-23
申请人： Paul M. Espelage , James M. Nowak
发明人： Paul M. Espelage , James M. Nowak
CPC分类号： H02P27/06 , H02M5/4505 , H02P23/0077 , H02P2201/03
摘要： An induction motor drive including a current source inverter system having controlled turn on and turn off semiconductors in a load side inverter selectively places notches in the waveshape of the current supplied to the parallel combination of the motor and a capacitor bank for the minimization of harmonics.
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公开(公告)号：US4426611A
公开(公告)日：1984-01-17
申请号：US372749
申请日：1982-04-28
CPC分类号： H02M5/4505 , H02P25/024 , H02P2201/13
摘要： A control system for powering an AC load such as a polyphase synchronous motor having at least two sets of three phase (3.phi.) windings. Each three phase winding set is powered by an independently operable six pulse load commutated inverter drive including a source side converter and a load side converter coupled together by means of a DC link and wherein the source side converter and the load side converter are operated in accordance with respective current and load angle regulators which respond to torque command signals generated by speed regulators. The two motor drives operate concurrently in separate control channels which are substantially independent of one another with the exception that in one embodiment, which is the preferred embodiment, the speed regulator and the motor terminal overvoltage regulator are cross-coupled to effect a balanced torque command and motor terminal voltage from each channel while still providing for continued motor operation by one of the motor drive channels in the event that the other becomes inoperative for any reason. In a second embodiment, one of two redundant speed regulators is adapted to provide a common torque command to both channels with the other speed regulator taking over in the event of the failure of said one speed regulator.
摘要翻译： 一种用于为诸如具有至少两组三相（3phi）绕组的多相同步电动机的交流负载供电的控制系统。 每个三相绕组由一个可独立操作的六个脉冲负载换向逆变器驱动器供电，该驱动器包括通过直流链路耦合在一起的源极侧转换器和负载侧转换器，其中源侧转换器和负载侧转换器按照 具有响应由调速器产生的转矩指令信号的各自的电流和负载角调节器。 两个电动机驱动器在独立的控制通道中同时运行，这些控制通道基本上彼此独立，除了在一个实施例中，优选实施例中，速度调节器和电动机端子过电压调节器交叉耦合以实现平衡转矩指令 并且每个通道的电动机端子电压同时由于任何原因而在另一个电机驱动通道不能工作的情况下继续由马达驱动通道运行。 在第二实施例中，两个冗余速度调节器中的一个适于在两个通道中提供公共转矩指令，而另一个调速器在所述一个速度调节器发生故障的情况下接管。
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9.发明授权Line-to-line voltage reconstruction for synchronizing thyristor power converter 失效用于同步晶闸管功率转换器的线间电压重建
公开(公告)号：US4399395A
公开(公告)日：1983-08-16
申请号：US300200
申请日：1981-09-08
申请人： Paul M. Espelage
发明人： Paul M. Espelage
CPC分类号： H02M5/4505
摘要： The effect of commutation notches 35 appearing in the nominally sinusoidal alternating current (AC) line-to-line voltage, for example, v.sub.ab used to synchronize the firing of thyristors in three phase, phase-locked power converters 12 and 14 is essentially eliminated by reconstructing the corrupted line-to-line voltage by summing the integral of the corrupted line-to-line voltage .PSI..sub.ab with a signal proportional to the product of the delta load current, for example, i.sub.ab and the commutation inductance L.sub.c. The composite waveform .PSI..sub.ab +i.sub.ab .times.L.sub.c) resulting from the summation has well defined zero crossings 41 from which synchronizing pulses are generated for synchronizing the phase-locked thyristor firing circuit 18 implemented by either software or hardware techniques. Additionally, the reconstructed waveform is used to control commutation, particularly in the control of a load side converter i.e. inverter 14 which is utilized in an AC motor drive system.
摘要翻译： 出现在名义上正弦交流（AC）线对线电压中的换向槽口35的作用，例如用于同步三相锁相功率转换器12和14中的晶闸管的点火的变压器基本上被 通过将损坏的线间电压PSI ab的积分与与δ负载电流（例如iab和乘法电感Lc）的乘积成比例的信号相加来重构损坏的线间电压。 由求和产生的复合波形PSI ab + iabxLc）具有良好定义的零交叉点41，产生同步脉冲用于使通过软件或硬件技术实现的锁相晶闸管点火电路18同步。 此外，重构波形用于控制换向，特别是在负载侧转换器的控制中，即在AC电动机驱动系统中使用的反相器14。
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10.发明授权Closed loop, microcomputer controlled pulse width modulated inverter-induction machine drive system 失效闭环，微电脑控制脉宽调制变频感应电机驱动系统
公开(公告)号：US4290001A
公开(公告)日：1981-09-15
申请号：US63126
申请日：1979-08-03
申请人： Paul M. Espelage
发明人： Paul M. Espelage
CPC分类号： H02P27/08 , H02P23/0077 , H02P27/047
摘要： Closed loop control of a pulse width modulated inverter-induction machine drive system is accomplished with a pair of microcomputers. The first microcomputer generates a periodic interrupt signal and a reference signal representative of the desired magnitude of a preselected induction machine parameter, the reference signal varying in frequency and amplitude in accordance with an externally-varied frequency value and amplitude value, respectively. The second microcomputer, when interrupted by the first microcomputer, computes the difference between the first microcomputer reference signal magnitude and the actual preselected machine parameter magnitude and the difference between the actual inverter output current magnitude and a preset limit, and controls inverter thyristor conduction accordingly.
摘要翻译： 脉宽调制逆变器感应电机驱动系统的闭环控制由一对微型计算机完成。 第一微型计算机产生周期性中断信号和表示预选感应电机参数的期望幅度的参考信号，参考信号分别根据外部变化的频率值和振幅值在频率和幅度上变化。 第二微型计算机在被第一微型计算机中断时，计算出第一微机参考信号幅度与实际预选机参数幅度之间的差异以及实际逆变器输出电流幅度与预设极限之间的差值，并据此控制逆变器晶闸管导通。
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