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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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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Transitioning between multiple modes of inverter control in a load commutated inverter motor drive 失效在负载换向的变频器电机驱动器中，在多种变频器控制模式之间切换
公开(公告)号：US4443747A
公开(公告)日：1984-04-17
申请号：US364453
申请日：1982-04-01
CPC分类号： H02P23/0077 , H02P1/52 , H02P25/024
摘要： The load side converter or inverter in a load commutated inverter motor drive, including a source side AC to DC converter coupled to a DC to AC converter via a DC link circuit, is adapted to have at least three and preferably four modes of operation for bringing an AC motor load, and more particularly a synchronous motor, up to speed. In the preferred embodiment, the first mode constitutes an idle mode wherein the converter thyristors are maintained in a non-conducting state until commanded for normal operation. The second mode constitutes an initial start-up mode which assumes no knowledge of initial rotor position of the motor and simply utilizes a fixed low frequency firing signal to sequentially gate the thyristors using forced commutation to commutate the off-going thyristor. Thirdly, a second type of forced commutation mode is next entered into where the inverter frequency is synchronized to the rotor of the motor by sensing pseudo-flux waveforms until 5% to 10% of rated motor speed is achieved whereupon a fourth mode is entered into which comprises a self-commutation mode utilizing a phase lock loop operation using pseudo-flux wave zero crossings as synchronizing signals.In the three mode embodiment, the third mode is eliminated and the second mode modified to vary the load side converter frequency on a time basis until reaching some preset value (e.g., five (5) to fifteen (15) percent of motor rated frequency) at which time transition is made to the self-commutation mode.
摘要翻译： 在负载换向的变频器电动机驱动器中的负载侧转换器或逆变器包括通过DC链路电路耦合到DC到AC转换器的源极侧AC到DC转换器，适于具有至少三个并且优选地四个操作模式 交流电动机负载，特别是同步电动机，直到速度。 在优选实施例中，第一模式构成空转模式，其中转换器晶闸管保持在非导通状态，直到命令用于正常操作。 第二模式构成初始启动模式，其不考虑电动机的初始转子位置，并且仅使用固定的低频点火信号来使用强制换向来顺序地对晶闸管进行栅极整流，从而使不稳定的晶闸管换向。 第三，接下来，通过感测伪通量波形，将逆变器频率与电动机的转子同步的第二种类型的强制换向模式，直到达到额定电动机速度的5％至10％，然后进入第四模式 其包括利用使用伪通量波过零作为同步信号的锁相环操作的自换流模式。 在三模式实施例中，第三模式被消除，第二模式被修改以在时间基础上改变负载侧转换器频率直到达到某个预设值（例如，电机额定频率的五（5）至十五（15）％） 此时转换为自换模式。
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公开(公告)号：US4427934A
公开(公告)日：1984-01-24
申请号：US343916
申请日：1982-01-29
申请人： Leland C. Tupper
发明人： Leland C. Tupper
CPC分类号： H02P23/0077 , H02P25/024
摘要： A current limiter for a load commutated inverter-synchronous motor drive including a source side AC to DC converter (12) and a load side DC to AC converter (14) coupled via a DC link circuit including an inductor (16) wherein a torque reference signal (TORQUE REF) generated for controlling both the converters is limited in response to the peak value .psi..sub.MAX of the pseudo flux waveform (.psi..sub.ab, .psi..sub.bc, .psi..sub.ca) which is derived from the integral (.intg.) of the motor terminal voltage (v.sub.ab, v.sub.bc, v.sub.ca) in order to limit the motor stator current I.sub.s to a value corresponding to the region of peak output torque T.sub.MAX obtainable for the motor field current I.sub.f applied. Control of both the source side converter (12) and the load side converter (14) by the torque reference signal operates to control the magnitude of the current I.sub.L in a DC link circuit which corresponds to the motor stator current I.sub.s as well as the frequency of the AC power applied to the motor.
摘要翻译： 一种用于负载换向的逆变器 - 同步电动机驱动器的限流器，包括源极侧AC至DC转换器（12）和负载侧DC至AC转换器（14），所述负载侧DC至AC转换器（14）通过包括电感器（16）的DC链路电路耦合，其中转矩基准 产生用于控制两个转换器的信号（TORQUE REF）响应于从电动机端子电压的积分（INTEGRAL）导出的伪通量波形的峰值psi MAX（psi ab，psi bc，psi ca）而受到限制 （vab，vbc，vca），以将电动机定子电流Is限制为对应于电机励磁电流If可获得的峰值输出转矩TMAX的区域的值。 由转矩基准信号控制源极侧变换器（12）和负载侧变换器（14）进行动作，以控制与电动机定子电流Is对应的直流母线电路中的电流IL的大小以及频率 的交流电源。
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5.发明授权Excitation current control for induction motor drive using load commutated inverter circuit 失效感应电动机驱动的励磁电流控制采用负载换向逆变电路
公开(公告)号：US4600874A
公开(公告)日：1986-07-15
申请号：US705962
申请日：1985-02-26
CPC分类号： H02J3/1892 , H02M5/4505 , H02M7/525 , H02P25/024 , H02P27/06 , H02P2201/13 , H02P2207/01
摘要： A system for controlling the operation of an alternating current induction motor having windings supplied by electrical power from the polyphase alternating current source includes a load commutated inverter circuit which is connected between the power source and the induction motor for furnishing electrical power to the motor. Controllers responsive to a command signal and a feedback signal indicative of motor operating parameters control the operation of said load commutated inverter circuit. There is further provided a fixed capacitor circuit connected between the windings of the motor for supplying reactive volt amperes (VARs) to said load commutated inverter circuit and said motor. Finally, there is provided a variable VAR generator connected between the motor windings for supplying VARs to said load commutated inverter circuit and said motor in response to the output of a third feedback control path which is also responsive to a command signal and prescribed operating parameter(s) of said load and/or said commutated inverter.
摘要翻译： 用于控制具有来自多相交流电源的电力提供的绕组的交流感应电动机的操作的系统包括连接在电源和感应电动机之间的用于向电动机提供电力的负载换向逆变电路。 响应于命令信号的控制器和指示电动机操作参数的反馈信号控制所述负载换向逆变器电路的操作。 还提供了一个固定电容器电路，其连接在电动机绕组之间，用于向所述负载换向逆变器电路和所述电动机提供无功伏安（VAR）。 最后，提供了连接在电动机绕组之间的可变VAR发生器，用于响应于第三反馈控制路径的输出而向所述负载换向逆变器电路和所述电动机提供VAR，该第三反馈控制路径也响应于指令信号和规定的操作参数 s）所述负载和/或所述换向逆变器。
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公开(公告)号：US4446414A
公开(公告)日：1984-05-01
申请号：US322741
申请日：1981-11-19
申请人： Leland C. Tupper
发明人： Leland C. Tupper
CPC分类号： H02P25/024
摘要： A control system for a load commutated inverter AC synchronous motor drive provides an operational shift in the event of an increase in motor terminal voltage V.sub.TERM above a preselected reference level. Under such an increase in terminal voltage, control is transferred from a condition where torque is controlled by current and the terminal voltage is uncontrolled to a condition where the load current, e.g., the DC link current I.sub.L flowing between a source side thyristor converter (AC to DC) 12 and a load side thyristor inverter (DC to AC) 14 is utilized to control the motor terminal voltage while the firing angle of the thyristor inverter 14 is used to control the motor torque. This involves increasing the minimum load or motor drive current for a desired torque while adjusting the inverter firing angle from a previous value, so that the desired torque is provided at a higher current I.sub.L and lower terminal voltage V.sub.TERM than before. Such an operational shift, in effect, uses a component of the load current to demagnetize the motor field in order to maintain the motor terminal voltage at an acceptable level.
摘要翻译： 负载整流逆变器交流同步电动机驱动器的控制系统在电机端子电压VTERM增加到高于预先选定的参考电平的情况下提供操作移位。 在这种端子电压增加的情况下，通过电流控制转矩的控制，并且将端子电压不受控制地转移到负载电流（例如在源极侧晶闸管转换器（AC） 到DC）12和负载侧晶闸管逆变器（DC-AC）14用于控制电动机端子电压，同时使用晶闸管逆变器14的触发角度来控制电动机转矩。 这涉及在从前一个值调节逆变器触发角度的同时增加期望转矩的最小负载或电动机驱动电流，从而在比以前更高的电流IL和更低的端子电压VTERM提供期望的转矩。 实际上，这样的操作变换使用负载电流的分量来消磁电动机场，以将电动机端子电压维持在可接受的水平。
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