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1. 发明授权

US5430362A Engine starting system utilizing multiple controlled acceleration rates 失效
标题翻译：引擎起动系统采用多个受控加速度
公开(公告)号：US5430362A
公开(公告)日：1995-07-04
申请号：US63166
申请日：1993-05-12
申请人： Kenneth R. Carr , Gregory I. Rozman , Albert L. Markunas , Michael J. Hanson , Leland E. Weber , James A. Shippling , Malcolm J. McArthur , Vijay K. Maddali , Paul E. Nuechterlein , Alexander Cook , Vietson Nguyen , Mario R. Rinaldi
发明人： Kenneth R. Carr , Gregory I. Rozman , Albert L. Markunas , Michael J. Hanson , Leland E. Weber , James A. Shippling , Malcolm J. McArthur , Vijay K. Maddali , Paul E. Nuechterlein , Alexander Cook , Vietson Nguyen , Mario R. Rinaldi
IPC分类号： F01D15/10 , F02C7/268 , F02N11/04 , H02P9/08 , H02P1/46
CPC分类号： F02N11/04 , H02P9/302 , F05B2220/50
摘要： A control for operating an electromagnetic machine in a starting mode of operation wherein the main armature winding of the machine receives electrical power from a controllable power source during the starting mode of operation, comprises a circuit for detecting a magnitude of a parameter of power applied to the main armature winding relative to a stationary frame of reference, a position sensor for detecting rotor position of the electromagnetic machine, a converter responsive to angular position indication for converting the detected parameter magnitude into field and torque producing components relative to a rotating frame of reference, and a circuit responsive to the field and torque producing components for controlling the power source during operation in the starting mode. This control includes an igniter for igniting a prime mover. Further, the control is operable during a first phase prior to ignition of the prime mover for causing the electromagnetic machine to provide motive power to the prime mover so as to accelerate the prime mover at a first predetermined rate, is operable during a second phase subsequent to the first phase so as to accelerate the prime mover at a second predetermined rate, is operable during this second phase for providing fuel to the prime mover to facilitate ignition thereof, and is operable during a third phase subsequent to the ignition of the prime mover so as to accelerate the prime mover at a third predetermined rate to a self-sustaining speed.
摘要翻译：一种用于在起动操作模式下操作电磁机器的控制器，其中机器的主电枢绕组在起动操作模式期间从可控电源接收电力，包括用于检测施加到相对于固定参考系的主电枢绕组，用于检测电磁机器的转子位置的位置传感器，响应于角度位置指示的转换器，用于将检测到的参数幅度转换成相位和转矩产生部件相对于旋转参考系以及响应于场和转矩产生组件的电路，用于在起动模式下操作期间控制电源。该控制包括用于点燃原动机的点火器。此外，控制可以在原动机点火之前的第一阶段期间操作，以使得电磁机器向原动机提供动力，以便以第一预定速率加速原动机，在第二阶段期间可操作到第一阶段以便以第二预定速率加速原动机，在该第二阶段期间可操作以向原动机提供燃料以促进其点燃，并且在原动机点火之后的第三阶段期间可操作以便将原动机以第三预定速率加速至自持速度。

2. 发明授权

US5384527A Rotor position detector with back EMF voltage estimation 失效
标题翻译：具有反电动势电压估计的转子位置检测器
公开(公告)号：US5384527A
公开(公告)日：1995-01-24
申请号：US61364
申请日：1993-05-12
申请人： Gregory I. Rozman , Vijay K. Maddali , Albert L. Markunas
发明人： Gregory I. Rozman , Vijay K. Maddali , Albert L. Markunas
IPC分类号： F02N11/04 , H02K19/26 , H02K29/00 , H02P6/18 , H02P9/02 , H02K29/06
CPC分类号： H02P6/188 , F02N11/04 , H02P6/18 , H02P9/02 , H02P9/302 , H02K19/26 , H02P2101/30
摘要： A detector for detecting rotor position of a brushless generator having a motive power shaft and a main generator portion having a set of armature phase windings capable of receiving AC power and developing a back EMF voltage during operation in a starting mode, includes a circuit coupled to the set of armature phase windings and capable of responding to the AC power for producing a back EMF estimate signal representing an estimate of the back EMF voltage. The detector also includes a circuit for converting the back EMF estimate signal into an indication of the angular position of the motive power shaft.
摘要翻译：一种用于检测具有动力轴的无刷发电机的转子位置的检测器和具有能够在起动模式下操作期间接收AC电力并且产生反电动势电压的一组电枢相绕组的主发电机部分，包括耦合到该组电枢相绕组并且能够响应于交流电源以产生表示反电动势电压的估计的反电动势估计信号。检测器还包括用于将反电动势估计信号转换成动力轴的角位置的指示的电路。

3. 发明授权

US5327335A Harmonic feedback control for an inverter 失效
标题翻译：变频器谐波反馈控制
公开(公告)号：US5327335A
公开(公告)日：1994-07-05
申请号：US952108
申请日：1992-09-28
申请人： Vijay K. Maddali , Albert L. Markunas
发明人： Vijay K. Maddali , Albert L. Markunas
IPC分类号： H02M1/12 , H02M7/5395
CPC分类号： H02M7/5395 , H02M1/12
摘要： Harmonics in the AC output power of an inverter are sensed and are compared to corresponding references to produce a plurality of errors. These errors are used to produce a harmonic waveform which is in turn used in a triangular waveform PWM pulse generator to generate PWM pulses. The PWM pulses control the inverter so as to convert DC power into AC power and so as to reduce harmonics in the AC power.
摘要翻译：感测逆变器的交流输出功率的谐波，并将其与相应的参考值进行比较以产生多个误差。这些误差用于产生谐波波形，该谐波波形又用于三角波PWM脉冲发生器以产生PWM脉冲。 PWM脉冲控制逆变器，将直流电转换成交流电源，以减少交流电源的谐波。

4. 发明申请

US20090045293A1 GENERATOR FOR GAS TURBINE ENGINE HAVING DC BUS FAULT SHORT CIRCUIT CONTROL USING A BATTERY 有权
标题翻译：使用电池进行直流母线故障短路控制的气体发动机发电机
公开(公告)号：US20090045293A1
公开(公告)日：2009-02-19
申请号：US11839823
申请日：2007-08-16
申请人： Gregory I. Rozman , Kevin Dooley , Vijay K. Maddali
发明人： Gregory I. Rozman , Kevin Dooley , Vijay K. Maddali
IPC分类号： B64D31/00
CPC分类号： B64D33/00 , B64D2221/00 , H02J9/06
摘要： An aircraft electrical system comprises a generator to be driven as part of a gas turbine engine. The generator supplies electrical power to a plurality of accessories associated with the gas turbine engine, and to an aircraft DC bus in parallel to the supply to the accessories. A battery supplies voltage to a control circuit for the generator through a selectively opened and closed switch. A control detects a short circuit on the aircraft DC bus. The battery switch allows power from the battery to flow to provide control voltage for the generator when the control detects a short circuit on the aircraft DC bus.
摘要翻译：飞机电气系统包括作为燃气涡轮发动机的一部分驱动的发电机。发电机对与燃气涡轮发动机相关联的多个附件以及平行于附件供应的飞机DC总线供电。电池通过选择性地打开和关闭的开关向发电机的控制电路提供电压。控制器检测飞机直流总线上的短路。当控制器检测到飞机直流总线上的短路时，电池开关允许来自电池的电力流动以提供发电机的控制电压。

5. 发明授权

US5016157A VSCF system with DC link harmonics control 失效
标题翻译： VSCF系统具有直流链路谐波控制
公开(公告)号：US5016157A
公开(公告)日：1991-05-14
申请号：US428759
申请日：1989-10-30
申请人： Gregory I. Rozman , Vijay K. Maddali
发明人： Gregory I. Rozman , Vijay K. Maddali
IPC分类号： H02M1/12 , H02M5/452
CPC分类号： H02M1/12 , H02M5/452
摘要： The problem of reducing harmonic content of AC bus voltage in a power system (10) is minimized using a controller (30) for a PWM inverter (38). The controller (30) develops a duty cycle command on a line (40) for controlling operation of the PWM inverter (38). The controller (30) develops the duty cycle command to maintain the PWM inverter output voltage at a desired level. This duty cycle command is modulated in accordance with the harmonic content evident on a DC bus (34) which supplies power to the PWM inverter (38).
摘要翻译：使用用于PWM逆变器（38）的控制器（30）来最小化在电力系统（10）中减少AC总线电压谐波含量的问题。控制器（30）在用于控制PWM逆变器（38）的操作的线路（40）上产生占空比指令。控制器（30）产生占空比指令，以将PWM逆变器输出电压维持在期望的水平。该占空比指令根据向PWM逆变器（38）供电的DC总线（34）上明显的谐波含量进行调制。

6. 发明授权

US07808215B2 Active damping for synchronous generator torsional oscillations 有权
标题翻译：同步发电机扭转振荡的主动阻尼
公开(公告)号：US07808215B2
公开(公告)日：2010-10-05
申请号：US11824659
申请日：2007-07-02
申请人： Albert L. Markunas , Vijay K. Maddali
发明人： Albert L. Markunas , Vijay K. Maddali
IPC分类号： H02P11/00 , H02P9/00
CPC分类号： H02P9/10 , H02P2101/30
摘要： A generator control unit (GCU) provides active damping of a synchronous generator by monitoring the speed of the synchronous generator and detecting oscillations in the monitored speed. The oscillations are indicative of torsional oscillations within the mechanical drivetrain including the synchronous generator or generators. In response to detected oscillations in the monitored speed, the GCU generates a varying set-point value that is used to control the excitation voltage provided to the synchronous generator. Varying the excitation voltage provided to the synchronous generator causes a variation in synchronous generator torque. By selectively varying the torque in the synchronous generator, the GCU provides active damping in the synchronous generator that decreases or dampens the torsional oscillations.
摘要翻译：发电机控制单元（GCU）通过监视同步发电机的速度并以监视的速度检测振荡，提供同步发电机的主动阻尼。振荡表示包括同步发电机或发电机在内的机械传动系统内的扭转振荡。响应于检测到的监视速度的振荡，GCU产生用于控制提供给同步发电机的激励电压的变化的设定值。改变提供给同步发电机的励磁电压会导致同步发电机转矩的变化。通过选择性地改变同步发电机中的转矩，GCU在同步发电机中提供主动阻尼，减少或抑制扭转振荡。

7. 发明申请

US20100175478A1 Torque Oscillation Monitoring 有权
标题翻译：扭矩振荡监测
公开(公告)号：US20100175478A1
公开(公告)日：2010-07-15
申请号：US12352050
申请日：2009-01-12
申请人： Albert L. Markunas , Vijay K. Maddali
发明人： Albert L. Markunas , Vijay K. Maddali
IPC分类号： G01H1/10
CPC分类号： H02P23/04 , H02P9/10
摘要： A method of detecting and monitoring torsional oscillation in a mechanical coupling between a prime mover and a multiphase alternating current (AC) electrical generator, comprises the steps of: detecting in at least one received signal variations that are indicative of changes in the rotational speed of the electrical generator; extracting information from the detected variations that are indicative of torsional oscillation to produce a torsional oscillation signal that has information relating to at least the amplitude of the torsional oscillation; and monitoring the torsional oscillation signal to determine the presence and severity of the torsional oscillation in the mechanical coupling.
摘要翻译：一种在原动机和多相交流（AC）发电机之间的机械耦合中检测和监测扭转振荡的方法包括以下步骤：在至少一个接收的信号变化中检测指示转速的变化发电机; 从指示扭转振荡的检测到的变化中提取信息以产生具有与至少扭转振荡的振幅有关的信息的扭转振荡信号; 并监测扭转振荡信号以确定机械耦合中扭转振荡的存在和严重性。

8. 发明授权

US07884581B2 Active damping for synchronous generator torsional oscillations 有权
标题翻译：同步发电机扭转振荡的主动阻尼
公开(公告)号：US07884581B2
公开(公告)日：2011-02-08
申请号：US12875760
申请日：2010-09-03
申请人： Albert L. Markunas , Vijay K. Maddali
发明人： Albert L. Markunas , Vijay K. Maddali
IPC分类号： H02P11/00 , H02P9/00
CPC分类号： H02P9/10 , H02P2101/30
摘要： A generator control unit (GCU) provides active damping of a synchronous generator by monitoring the speed of the synchronous generator and detecting oscillations in the monitored speed. The oscillations are indicative of torsional oscillations within the mechanical drivetrain including the synchronous generator or generators. In response to detected oscillations in the monitored speed, the GCU generates a varying set-point value that is used to control the excitation voltage provided to the synchronous generator. Varying the excitation voltage provided to the synchronous generator causes a variation in synchronous generator torque. By selectively varying the torque in the synchronous generator, the GCU provides active damping in the synchronous generator that decreases or dampens the torsional oscillations.
摘要翻译：发电机控制单元（GCU）通过监视同步发电机的速度并以监视的速度检测振荡，提供同步发电机的主动阻尼。振荡表示包括同步发电机或发电机在内的机械传动系统内的扭转振荡。响应于检测到的监视速度的振荡，GCU产生用于控制提供给同步发电机的激励电压的变化的设定值。改变提供给同步发电机的励磁电压会导致同步发电机转矩的变化。通过选择性地改变同步发电机中的转矩，GCU在同步发电机中提供主动阻尼，减少或抑制扭转振荡。

9. 发明申请

US20080315822A1 Rotor position detection at standstill and low speeds using a low power permanent magnet machine 有权
标题翻译：使用低功率永磁机在静止和低速下进行转子位置检测
公开(公告)号：US20080315822A1
公开(公告)日：2008-12-25
申请号：US11820640
申请日：2007-06-20
申请人： Vijay K. Maddali , Albert L. Markunas
发明人： Vijay K. Maddali , Albert L. Markunas
IPC分类号： H02P23/14 , H02P23/03
CPC分类号： H02P6/18 , H02P25/024
摘要： For a multiphase alternating current (AC) wound field synchronous machine (WFSM) that has a stator with a selected number of poles, the WFSM having an associated exciter and multiphase AC permanent magnet machine (PMM) directly coupled to the WFSM, a method of sensing the position of a rotor in the WFSM comprises the steps of: configuring a stator for the PMM to have a number of poles that is a sub-multiple of the selected number of WFSM stator poles; configuring a rotor for the PMM to have high saliency; applying multiphase AC power of a selected frequency to the PMM stator: detecting at least one set of stator harmonic currents of the multiphase AC power resulting from the rotor saliency; converting the detected PMM harmonic stator currents from their multiphase coordinates to αβ coordinates; rotating the converted PMM stator currents into a reference frame for at least one selected harmonic to generate αβ coordinate harmonic current vectors; and estimating the position of the WFSM rotor based on the values of the αβ coordinate harmonic current vectors in the selected harmonic reference frame.
摘要翻译：对于具有选定数量极数的定子的多相交流（AC）绕线场同步电机（WFSM），具有与WFSM直接耦合的相关联的激励器和多相交流永磁机（PMM）的WFSM，感测WFSM中转子的位置包括以下步骤：将PMM的定子配置为具有选定数量的WFSM定子极子的倍数的极数; 为PMM配置转子具有高显着性; 将所选频率的多相交流电力施加到所述PMM定子：检测由所述转子显着性产生的所述多相AC电力的至少一组定子谐波电流; 将检测到的PMM谐波定子电流从其多相位坐标转换为字母坐标; 将转换的PMM定子电流旋转到用于至少一个所选谐波的参考系以产生字母表坐标谐波电流矢量; 以及基于所选择的谐波参考帧中的字母表坐标谐波电流矢量的值来估计WFSM转子的位置。

10. 发明授权

US5383107A Harmonic control for an inverter by use of an objective function 失效
标题翻译：使用目标功能对变频器进行谐波控制
公开(公告)号：US5383107A
公开(公告)日：1995-01-17
申请号：US973119
申请日：1992-11-06
申请人： Christopher E. Hopkins , Albert L. Markunas , Vijay K. Maddali , Richard A. Arbanella
发明人： Christopher E. Hopkins , Albert L. Markunas , Vijay K. Maddali , Richard A. Arbanella
IPC分类号： H02M1/12 , H02M7/5395
CPC分类号： H02M1/12 , H02M7/5395
摘要： A control unit for an inverter determines an objective function based upon harmonic content in a minimum number of the phase-to-phase AC voltages produced by the inverter and controls the switches of the inverter so as to minimize the objective function to thus control the harmonic content in the inverter output voltages.The objective function may be defined according to the following equation: ##EQU1## where W.sub.k are scaler weighting factors, A.sub.kA, A.sub.kB and A.sub.kC are the Fourier cosine coefficients of the kth harmonic of the inverter phase A, B and C outputs, B.sub.kA, B.sub.kB and B.sub.kC are the Fourier sine coefficients of the kth harmonic of the inverter phase A, B and C outputs, k is the number of the controlled odd harmonic (i.e., k=1, 3, 5 . . . ), and NHARM is the number of the highest controlled odd harmonic.
摘要翻译：逆变器的控制单元基于由逆变器产生的最小数量的相间AC电压中的谐波含量来确定目标函数，并且控制逆变器的开关以最小化目标函数从而控制谐波变频器输出电压内容。目标函数可以根据以下等式定义：AC）2 + + TR（BkA-BkC-HBkAC）2}; 其中Wk是缩放加权因子，AkA，AkB和AkC是逆变器相位A，B和C输出的第k次谐波的傅里叶余弦系数，BkA，BkB和BkC是逆变器相位的第k次谐波的傅里叶正弦系数 A，B和C输出，k是受控奇次谐波的数量（即k = 1,3,5 ...），并且NHARM是最高受控奇次谐波的数量。

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