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1. 发明授权

US4641231A Apparatus and method for failure testing of a control turn-off semiconductor 失效
标题翻译：控制关断半导体的故障测试装置和方法
公开(公告)号：US4641231A
公开(公告)日：1987-02-03
申请号：US805646
申请日：1985-12-06
申请人： Loren H. Walker , Georges R. E. Lezan
发明人： Loren H. Walker , Georges R. E. Lezan
IPC分类号： G01R31/26 , H02H7/12 , H02M1/00 , H02M1/38 , H02H7/122
CPC分类号： H02M1/38
摘要： A scheme for determining the operational state of a control turn-off semiconductor, of the type having an anode, a cathode and control electrode to which signals are applied to control the conductive state of the semiconductor, utilizes the extant voltage at the control electrode to determine the actual conductive state of the semiconductor. A first signal representing the desired operational state of the semiconductor and a second signal representing the actual operation of the state of the semiconductor and appropriately combined in one embodiment to generate an indication of the operational state of the control turn-off semiconductor. A further embodiment, employed in a series connection of two such control turn-off semiconductors beteen dc buses, uses the second signals in a cross-coupled arrangement between the two semiconductors to inhibit the application of control signals to a first semiconductor if the second semiconductor is conductive.In a still further embodiment, the cross-coupled system just described is further combined with an anode sensing system to provide an improved, more positive system of preventing the dc short by providing the anode system sensing output system as a further input to the combination of the cross-coupled second signal and signal representing desired conduction.In an additional modification a latch function serves, in the cross-coupled embodiments, to render the cross-coupling inhibiting ineffective, once a semiconductor has been rendered conductive, for the commanded period of conduction.
摘要翻译：用于确定控制关断半导体的操作状态的方案，具有施加信号以控制半导体的导通状态的阳极，阴极和控制电极的类型利用控制电极的现有电压确定半导体的实际导电状态。表示半导体的期望工作状态的第一信号和表示半导体状态的实际操作的第二信号，并且在一个实施例中适当地组合以产生控制关断半导体的操作状态的指示。在两个直流总线之间的两个这样的控制关断半导体的串联连接中采用的另一个实施例使用两个半导体之间的交叉耦合布置中的第二信号来禁止将控制信号施加到第一半导体，如果第二半导体是导电的。在又一实施例中，刚刚描述的交叉耦合系统进一步与阳极感测系统组合，以通过提供阳极系统感测输出系统作为进一步的输入来提供改进的，更积极的防止直流短路的系统交叉耦合的第二信号和表示期望导通的信号。在另外的修改中，在交叉耦合的实施例中，锁存功能用于在半导体已经导通的情况下使交叉耦合抑制无效，达到指令的导通周期。

2. 发明授权

US5338994A Method and apparatus for achieving current balance in parallel connected switching devices 失效
标题翻译：并联交换装置实现电流平衡的方法和装置
公开(公告)号：US5338994A
公开(公告)日：1994-08-16
申请号：US71375
申请日：1993-06-04
申请人： Georges R. E. Lezan , Loren H. Walker
发明人： Georges R. E. Lezan , Loren H. Walker
IPC分类号： H02M1/088 , H03K17/12 , H02J1/14 , H02J3/06 , H03K17/72
CPC分类号： H02M1/088 , H03K17/125 , Y10T307/43 , Y10T307/549 , Y10T307/729
摘要： A scheme for maintaining current balance within a plurality of semiconductor devices, particularly thyristors and gate turn-off thyristors, which plurality is connected between two electrical power sources which devices are configured to be simultaneously conductive to share the current between the two sources, employs the scheme for maintaining the current within the several devices of the plurality equal. The scheme provides for the generation of individual current signals which represent the individual current magnitudes within the several devices. Further generated is an average current signal representing the average current within the plurality. A difference signal is generated with respect to each of the individual current signals which represents the difference between the average and the individual current signal. The difference signal is then employed to vary the time of application of the next control signal to the associated one of the devices to thereby minimize current imbalance within the plurality.
摘要翻译：用于在多个半导体器件，特别是晶闸管和栅极截止晶闸管之间维持电流平衡的方案，其多个连接在两个电源之间，这些电源被配置为同时导通以共享两个源之间的电流，采用用于维持多个装置内的电流相等的方案。该方案提供了代表几个装置内的各个电流幅度的各个电流信号的产生。进一步产生表示多个平均电流的平均电流信号。相对于表示平均值和各个电流信号之间的差的各个电流信号产生差分信号。然后使用差分信号来改变下一个控制信号施加到相关联的一个装置的时间，从而最小化多个装置内的电流不平衡。

3. 发明授权

US4775925A Method and apparatus for determining the control electrode to cathode junction voltage of a control turn-off semiconductor device and use of such determined voltage in the control of the device 失效
标题翻译：用于确定控制关断半导体器件的控制电极至阴极结电压的方法和装置以及在该器件的控制中使用这种确定的电压
公开(公告)号：US4775925A
公开(公告)日：1988-10-04
申请号：US124206
申请日：1987-11-23
申请人： Georges R. E. Lezan , Loren H. Walker
发明人： Georges R. E. Lezan , Loren H. Walker
IPC分类号： H03K17/732 , H03K17/04 , H03K17/0812 , H03K17/73 , H02H7/125
CPC分类号： H03K17/0403 , H03K17/08124
摘要： An apparatus and method relative to the operating of a control turn-off semiconductor device provide for determining the actual control electrode to cathode voltage upon the application of a turn-off control signal by adjusting the apparent value of that voltage by a value representing the voltage drop due to inductance in lead lines. The thusly adjusted value is employed to develop an output signal which indicates that the device has been turned off. In a further embodiment, the output signal may also be employed to reduce the value of the control signal from a first, relatively high value to a second, relatively low value.

4. 发明授权

US4355242A Voltage regulating system 失效
标题翻译：电压调节系统
公开(公告)号：US4355242A
公开(公告)日：1982-10-19
申请号：US917137
申请日：1978-06-19
申请人： Georges R. E. Lezan , Marvin W. Smith , Loren H. Walker
发明人： Georges R. E. Lezan , Marvin W. Smith , Loren H. Walker
IPC分类号： H02M5/257 , H03K17/60
CPC分类号： H02M5/2573
摘要： A voltage regulating or control system employing a triac for controlling the power supplied to a load from an alternating current (a.c.) voltage source uses an oscillator as a phase controller to initiate a first switching pulse in each half-cycle of the voltage source. A feedback loop responsive to the first pulse in each half-cycle acts to increase the output frequency of the oscillator to thereby provide pulse train firing of the triac. An additional circuit acts to define a "window" which serves to establish a period within each half-cycle of the a.c. source during which the delivery of switching of pulses is prohibited.
摘要翻译：使用三端双向可控硅开关控制器的电压调节或控制系统用于控制从交流（AC）电压源提供给负载的功率，使用振荡器作为相位控制器来在电压源的每个半周期内启动第一开关脉冲。响应于每个半周期中的第一脉冲的反馈回路用于增加振荡器的输出频率，从而提供三端双向可控硅开关的脉冲串点火。附加电路用于定义“窗口”，其用于在交流电的每个半周期内建立周期。源在此期间禁止发送脉冲的切换。

5. 发明授权

US4602199A Control for induction motor drive using load commutated inverter circuit 失效
标题翻译：使用负载换向逆变电路控制感应电机驱动
公开(公告)号：US4602199A
公开(公告)日：1986-07-22
申请号：US705963
申请日：1985-02-26
申请人： Loren H. Walker
发明人： Loren H. Walker
IPC分类号： H02J3/18 , H02M5/45 , H02M7/525 , H02P25/02 , H02P27/06 , H02P5/40
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 ampheres (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.

6. 发明授权

US4449087A Flux feedback firing control for a load commutated inverter 失效
标题翻译：负载换向逆变器的通量反馈点火控制
公开(公告)号：US4449087A
公开(公告)日：1984-05-15
申请号：US333933
申请日：1981-12-23
申请人： David L. Lippitt , Paul M. Espelage , Leland C. Tupper , Loren H. Walker , Herbert W. Weiss
发明人： David L. Lippitt , Paul M. Espelage , Leland C. Tupper , Loren H. Walker , Herbert W. Weiss
IPC分类号： H02P25/02 , H02P5/40
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。

7. 发明授权

US4230979A Controlled current inverter and motor control system 失效
标题翻译：控制电流逆变器和电机控制系统
公开(公告)号：US4230979A
公开(公告)日：1980-10-28
申请号：US895189
申请日：1978-04-10
申请人： Paul M. Espelage , Loren H. Walker , William G. Wright, deceased
发明人： Paul M. Espelage , Loren H. Walker , William G. Wright, deceased
IPC分类号： H02P21/00 , H02P27/04 , H02P5/28 , H02P3/18 , H02P7/36
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。

8. 发明授权

US4070701A Inverter power supply 失效
标题翻译：逆变电源
公开(公告)号：US4070701A
公开(公告)日：1978-01-24
申请号：US657384
申请日：1976-02-11
申请人： John D. Harnden, Jr. , William P. Kornrumpf , John P. Walden , Loren H. Walker
发明人： John D. Harnden, Jr. , William P. Kornrumpf , John P. Walden , Loren H. Walker
IPC分类号： H02M3/337 , H02M3/335
CPC分类号： H02M3/3378
摘要： A high frequency inverter power supply includes a high power inverter section powered by substantially unfiltered rectified a.c., and a control section including rectifier and filter means for providing substantially pure d.c. to maintain continuous instantaneous control over the high power inverter section. High frequency transformer means and optional output rectifiers and filters provide for a.c. or d.c. output.
摘要翻译：高频逆变器电源包括由基本上未过滤的整流交流电源供电的大功率逆变器部分，以及包括整流器和滤波器装置的控制部分，用于提供基本上纯的直流。保持对大功率变频器部分的连续瞬时控制。高频变压器装置和可选输出整流器和滤波器提供直流。或直流输出。

9. 发明授权

US5070440A Power conversion scheme employing paralleled units 失效
标题翻译：电力转换方案采用并行单元
公开(公告)号：US5070440A
公开(公告)日：1991-12-03
申请号：US567226
申请日：1990-08-14
申请人： Loren H. Walker
发明人： Loren H. Walker
IPC分类号： H02J5/00 , H02M7/48 , H02M7/49 , H02M7/493 , H02M7/66
CPC分类号： H02M7/49 , H02M7/493
摘要： A power conversion scheme employing a group of parallel connected, individually controlled converter circuits each providing output currents employs a scheme of distributed notches in the output currents to facilitate connection between common DC current and AC voltage sources. By the parallel connection of a pair of groups, time phase displaced group to group, additional power capability and harmonic reduction is achieved.

10. 发明授权

US5041959A Control system for a current source converter supplying an AC bus 失效
标题翻译：用于提供AC总线的电流源转换器的控制系统
公开(公告)号：US5041959A
公开(公告)日：1991-08-20
申请号：US567225
申请日：1990-08-14
申请人： Loren H. Walker
发明人： Loren H. Walker
IPC分类号： H02J3/28 , H02J3/38 , H02J15/00
CPC分类号： H02J15/00 , Y10T307/516 , Y10T307/527 , Y10T307/735
摘要： An electrical power converter including both DC and AC power terminals which are respectively connected to a DC current source and an AC voltage source, the latter comprising the grid of an AC power utility. A capacitor is coupled to the AC terminals along with a load. A control and gating circuit is coupled to the converter for supplying control signals for the thyristors of a converter bridge included in the polyphase converter. When disconnected from the utility grid, a relatively fast acting control loop is coupled to the control and gating circuit and is responsive to the current flowing in the capacitor and an AC reference voltage to accommodate the current source characteristics of the converter for maintaining an output voltage of substantially constant amplitude across the AC terminals. A second and relatively slower acting control loop is also coupled to the control and gating circuit via the fast acting control loop and is responsive to the AC voltage across the capacitor and the load for providing regulation of the voltage across the AC terminals during steady state operation.

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