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1. 发明申请

US20130070505A1 Inverter Control When Feeding High Impedance Loads 失效
标题翻译：进给高阻抗负载时的变频器控制
公开(公告)号：US20130070505A1
公开(公告)日：2013-03-21
申请号：US13235686
申请日：2011-09-19
申请人： David J. Gritter , James Ulrich
发明人： David J. Gritter , James Ulrich
IPC分类号： H02M7/44
CPC分类号： H02M7/53875
摘要： An inverter controller comprising a current regulator unit, a voltage regulator unit coupled to the current regulator unit, an inverter unit coupled to the voltage regulator unit, and a drive unit controlled by the inverter unit.
摘要翻译：一种逆变器控制器，包括电流调节器单元，耦合到电流调节器单元的电压调节器单元，耦合到电压调节器单元的逆变器单元和由逆变器单元控制的驱动单元。

2. 发明授权

US5633790A DV/DT limiting of inverter output voltage 失效
标题翻译：变频器输出电压的DV / DT限制
公开(公告)号：US5633790A
公开(公告)日：1997-05-27
申请号：US374013
申请日：1995-01-18
申请人： David J. Gritter , Jeffrey A. Reichard
发明人： David J. Gritter , Jeffrey A. Reichard
IPC分类号： H02H7/122 , H02M1/00 , H02M1/32 , H02P5/34
CPC分类号： H02M1/32 , H02H7/122
摘要： A voltage rise limiting circuit (10) for use in conjunction with an inverter-driven induction motor (14). The circuit (10) includes capacitors (C4, C5, C6) connected in a delta configuration, with each node (64, 66, 68) coupled between an inductor (L7,L8,L9) and an input line of a diode bridge rectifier. The rectifier clamps positive voltage levels, putting trapped energy back into the dc inverter bus.
摘要翻译：一种与逆变器驱动的感应电动机（14）结合使用的升压限制电路（10）。电路（10）包括以三角形配置连接的电容器（C4，C5，C6），每个节点（64,66,68）耦合在电感器（L7，L8，L9）和二极管桥式整流器的输入线。整流器钳位正电压电平，将被捕获的能量返回到直流逆变器总线。

3. 发明授权

US08693227B2 Inverter control when feeding high impedance loads 失效
标题翻译：供电高阻抗负载时变频器控制
公开(公告)号：US08693227B2
公开(公告)日：2014-04-08
申请号：US13235686
申请日：2011-09-19
申请人： David J. Gritter , James Ulrich
发明人： David J. Gritter , James Ulrich
IPC分类号： H02M1/08
CPC分类号： H02M7/53875
摘要： An inverter controller comprising a current regulator unit, a voltage regulator unit coupled to the current regulator unit, an inverter unit coupled to the voltage regulator unit, and a drive unit controlled by the inverter unit.
摘要翻译：一种逆变器控制器，包括电流调节器单元，耦合到电流调节器单元的电压调节器单元，耦合到电压调节器单元的逆变器单元和由逆变器单元控制的驱动单元。

4. 发明授权

US06407529B1 Method for controlling the starting of an induction motor utilizing closed loop alpha control 有权
标题翻译：利用闭环α控制来控制感应电机启动的方法
公开(公告)号：US06407529B1
公开(公告)日：2002-06-18
申请号：US09574852
申请日：2000-05-19
申请人： David J. Gritter , Dora Yuan Wang
发明人： David J. Gritter , Dora Yuan Wang
IPC分类号： H02P126
CPC分类号： H02P1/26
摘要： A method is provided for controlling a three-phase, AC induction motor. Each phase of the AC induction motor is connected to an AC input source by a thyristor switch and a bypass contactor connected in parallel in order to provide voltage and current to the AC induction motor. The method includes the steps of sequentially firing pairs of thyristor switches at a predetermined initial alpha firing angle. A new alpha firing angle is calculated which is dependant upon the initial alpha firing angle. Thereafter, pairs of thyristor switches are fired at the new alpha firing angle. The new alpha firing angle is provided as the initial alpha firing angle and a new alpha firing angle is calculated. The process is repeated until the AC induction motor reaches its full operating speed.
摘要翻译：提供一种用于控制三相AC感应电动机的方法。交流感应电动机的每相通过晶闸管开关和旁路接触器并联连接到交流输入源，以便向交流感应电动机提供电压和电流。该方法包括以预定的初始阿尔法激发角顺序地点击成对的晶闸管开关的步骤。计算一个新的α点火角，这取决于初始的α点火角。此后，成对的可控硅开关以新的α触发角发射。提供新的α触发角作为初始α触发角，并计算新的α触发角。重复该过程直到AC感应电动机达到其完全运行速度。

5. 发明授权

US5386186A Stator flux oriented control 失效
标题翻译：定子磁通定向控制
公开(公告)号：US5386186A
公开(公告)日：1995-01-31
申请号：US101854
申请日：1993-08-04
申请人： David J. Gritter
发明人： David J. Gritter
IPC分类号： H02P21/12 , H02P5/28
CPC分类号： H02P21/12
摘要： In an AC drive, a method for stator flux oriented control of a waveform generator providing switching signals to an inverter supplying pulse width modulated current to a three-phase, variable frequency induction motor is provided. The method includes generating a quadrature axis stator voltage signal, a direct axis stator voltage signal, and a stator frequency signal to which switching signals from the waveform generator to the inverter are responsive.
摘要翻译：在交流变频器中，提供了一种用于向提供脉宽调制电流的逆变器向三相变频感应电动机提供开关信号的波形发生器的定子磁通定向控制方法。该方法包括生成正交轴定子电压信号，直轴定子电压信号和定向频率信号，来自波形发生器到逆变器的开关信号响应于该定子频率信号。

6. 发明授权

US5045988A Isolated adjustable frequency AC inverter control 失效
标题翻译：隔离可调频率交流变频器控制
公开(公告)号：US5045988A
公开(公告)日：1991-09-03
申请号：US560113
申请日：1990-07-31
申请人： David J. Gritter , Michael A. Shanblatt , Elias G. Strangas
发明人： David J. Gritter , Michael A. Shanblatt , Elias G. Strangas
IPC分类号： H02M7/5387
CPC分类号： H02M7/53873 , Y10T307/669 , Y10T307/675
摘要： The control for an AC inverter includes a low voltage microcontroller referenced to ground potential and a waveform generator coupled to the microcontroller through a serial data link including optical isolation devices. The waveform generator floats at the negative bus potential of the DC source for the inverter. The waveform generator produces switching signals for the inverter under control of the microcomputer. The waveform generator, serial communications circuitry and other support circuits are all part of a single application specific integrated circuit.

7. 发明授权

US4990844A DC braking of inverter-driven AC motors 失效
标题翻译：变频器驱动的交流电机的直流制动
公开(公告)号：US4990844A
公开(公告)日：1991-02-05
申请号：US423811
申请日：1989-10-18
申请人： David J. Gritter , David M. Messersmith
发明人： David J. Gritter , David M. Messersmith
IPC分类号： H02P3/24
CPC分类号： H02P3/24
摘要： A DC braking system for an inverter-driven induction motor, (e.g., three-phase). When a braking command occurs, the normal gating sequence of the inverter stops. Mode 1 of the braking procedure starts. In Mode 1, two semiconductor phase switches of the group connected with one of the DC buses and the semiconductor switch of the third phase that is connected with the other DC bus are latched in a conducting state. The motor essentially receives DC current, which increases until it actuates a current limit device, clearing the latch. Then all six switches are turned off. That drives the motor current through the back-biased parallel diodes. The negative DC bus voltage is available to suppress motor current despite large motor speed voltages. The apparatus repeats the Mode 1 procedure for a predetermined time interval, after which Mode 2 of the braking procedure starts. In Mode 2, just as in Mode 1, two switches of one bus and one switch of another bus conduct until an overcurrent limit is reached. Then the one switch which is connected to a different bus turns off and its complement (same phase, other bus) turns on, allowing motor current to circulate in the motor windings. This allows current to decay at a slower rate than it would in Mode 1. The procedure of Mode 2 is repeated for a predetermined time interval. If the motor speed is below a predetermined threshold when the braking command occurs, Mode 1 is skipped and only Mode 2 is used.
摘要翻译：用于逆变器驱动的感应电动机的直流制动系统（例如，三相）。当制动指令发生时，变频器的正常门控序列停止。制动过程的模式1开始。在模式1中，与直流总线中的一个连接的组中的两个半导体相位开关和与另一个直流总线连接的第三相的半导体开关被锁存在导通状态。电机基本上接收直流电流，直流电流增加，直到它启动限流装置，清除闩锁。然后所有六个开关都关闭。这通过背偏置并联二极管驱动电机电流。负的直流母线电压可用于抑制马达电流，尽管电机速度电压很大。该装置重复模式1程序一段预定的时间间隔，然后制动程序的模式2开始。在模式2中，与模式1一样，另一总线的一个总线和一个开关的两个开关导通，直到达到过电流限制。然后连接到不同总线的一个开关关闭，其补充（相位相等，其他总线）导通，允许电机电流在电机绕组中循环。这允许电流以比模式1中更慢的速率衰减。模式2的过程重复预定的时间间隔。如果发生制动指令时电机转速低于预定阈值，则跳过模式1，仅使用模式2。

8. 发明授权

US4757225A Dual stack tachometer/generator 失效
标题翻译：双栈转速表/发电机
公开(公告)号：US4757225A
公开(公告)日：1988-07-12
申请号：US64720
申请日：1987-06-22
申请人： John H. Wolcott , David J. Gritter
发明人： John H. Wolcott , David J. Gritter
IPC分类号： G01P3/46 , H02K21/14 , H02K21/12 , H02K1/14
CPC分类号： G01P3/465 , H02K21/145 , H02K2201/12
摘要： A low cost, linear, low impedance tachometer/generator includes a stator and a rotor. The rotor includes a plurality of magnetic poles which alternate between first and second polarities, and the stator includes a plurality of first and second annular sets of planar laminated poles which are spaced apart, with the first set of poles having a first polarity and the second set of poles having a second polarity. An annular coil is disposed between the first and second sets of poles. The first set of poles is axially spaced apart and circumferentially offset one pole pitch about the axis of rotation from the second set of poles to effect simultaneous periodic alignment of the first set of poles on the stator with the plurality of poles on the rotor of the second polarity and the second set of poles on the stator with the plurality of poles on the rotor of the first polarity.
摘要翻译：低成本，线性，低阻抗转速计/发电机包括定子和转子。转子包括在第一和第二极性之间交替的多个磁极，并且定子包括间隔开的多个第一和第二环形组的平面层叠极，第一组极具有第一极性，而第二极具有第二极性的一组极。环形线圈设置在第一和第二组极之间。第一组磁极轴向间隔开，并且围绕第二组磁极的旋转轴线周向偏移一极点，以实现定子上的第一组磁极与转子上的多个极的同时周期性对准第二极性和定子上的第二组磁极，转子上的多个极具有第一极性。

9. 发明授权

US4749876A Universal power transistor base drive control unit 失效
标题翻译：通用功率晶体管基极驱动控制单元
公开(公告)号：US4749876A
公开(公告)日：1988-06-07
申请号：US944981
申请日：1986-12-22
申请人： Allan R. Gale , David J. Gritter
发明人： Allan R. Gale , David J. Gritter
IPC分类号： H03K17/0414 , H03K17/0422 , H03K17/082 , H03K3/26 , G05F1/40 , H03K3/33
CPC分类号： H03K17/0826 , H03K17/0414 , H03K17/0422
摘要： A saturation condition regulator system for a power transistor which achieves the regulation objectives of a Baker clamp but without dumping excess base drive current into the transistor output circuit. The base drive current of the transistor is sensed and used through an active feedback circuit to produce an error signal which modulates the base drive current through a linearly operating FET. The collector base voltage of the power transistor is independently monitored to develop a second error signal which is also used to regulate base drive current. The current-sensitive circuit operates as a limiter. In addition, a fail-safe timing circuit is disclosed which automatically resets to a turn OFF condition in the event the transistor does not turn ON within a predetermined time after the input signal transition.
摘要翻译：一种用于功率晶体管的饱和状态调节器系统，其实现了贝克钳位的调节目标，但不将过多的基极驱动电流转储到晶体管输出电路中。通过有源反馈电路感测并使用晶体管的基极驱动电流，以产生通过线性工作FET调制基极驱动电流的误差信号。独立监控功率晶体管的集电极基极电压，以产生第二个误差信号，该误差信号也用于调节基极驱动电流。电流敏感电路作为限幅器工作。此外，公开了一种故障安全定时电路，其在晶体管在输入信号转换之后的预定时间内不会导通的情况下自动复位到断开状态。

10. 发明授权

US08120932B2 Low voltage ride through 有权
标题翻译：低电压穿越
公开(公告)号：US08120932B2
公开(公告)日：2012-02-21
申请号：US12165921
申请日：2008-07-01
申请人： Douglas C. Folts , David J. Gritter , Michael P. Ross
发明人： Douglas C. Folts , David J. Gritter , Michael P. Ross
IPC分类号： H02M5/45 , H02M5/458
CPC分类号： H02J9/062 , Y02B10/72 , Y02E10/766
摘要： A system for connecting a wind turbine generator to a utility power network includes a first power converter that converts an AC signal from the wind turbine generator to a DC signal and supplies a controlled amount of reactive current to the wind turbine generator. The system also includes a second power converter, connected in series with the first converter, which converts the DC signal from the first power converter to a line-side AC signal and supplies a controlled amount of current to the utility power network. A power dissipation element is coupled to the first and second power converters for dissipating power from the first power converter.
摘要翻译：用于将风力涡轮发电机连接到公用电力网络的系统包括将来自风力涡轮发电机的AC信号转换为DC信号并将控制量的无功电流提供给风力涡轮发电机的第一功率转换器。该系统还包括与第一转换器串联连接的第二功率转换器，其将来自第一功率转换器的DC信号转换成线路侧交流信号，并向公用电力网络提供受控量的电流。功率耗散元件耦合到第一和第二功率转换器，用于从第一功率转换器消耗功率。

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