公开(公告)号：US06617821B2

公开(公告)日：2003-09-09

申请号：US09956781

申请日：2001-09-20

申请人： Russel J. Kerkman ,  David W. Schlegel ,  David Leggate

发明人： Russel J. Kerkman ,  David W. Schlegel ,  David Leggate

IPC分类号： H02P742

CPC分类号： H02P27/08 ,  H02P27/047

摘要： A method and apparatus for reducing parasitic distortion in terminal voltages connected to a PWM inverter, the method comprising the steps of receiving each of a command operating frequency and a command carrier frequency, comparing the command operating frequency to low and high threshold operating frequency values, and where the command operating frequency is less than the low threshold frequency, restricting the carrier frequency to a minimum carrier frequency, where the command operating frequency is greater than the high threshold frequency, setting the carrier frequency equal to the command carrier frequency and, where the operating frequency is between the low and high threshold frequencies, setting the carrier frequency to an intermediate value between the minimum carrier frequency and the commanded carrier frequency.

公开(公告)号：US08503207B2

公开(公告)日：2013-08-06

申请号：US12893838

申请日：2010-09-29

申请人： Rangarajan M. Tallam ,  Russel J. Kerkman ,  David Leggate

发明人： Rangarajan M. Tallam ,  Russel J. Kerkman ,  David Leggate

IPC分类号： H02M7/797

CPC分类号： H02M5/4585 ,  H02M1/12 ,  H02M2001/0025 ,  H02M2001/123 ,  H02M2001/385

摘要： Control systems, methods and power conversion systems are presented for reducing common mode voltages in AC motor loads driven by inverter PWM control using switching sequences with only active vectors where a first vector of each switching sequence differs by one phase switching state from a last vector of a switching sequence of an adjacent sector, along with enhanced deadtime compensation and reflected wave reduction techniques in providing pulse width modulated switching signals to a switching inverter.

摘要翻译： 提出了控制系统，方法和功率转换系统，用于降低由逆变器PWM控制驱动的交流电动机负载中的共模电压，其中仅使用具有每个开关序列的第一向量与一个相位切换状态与最后一个矢量 相邻扇区的切换序列，以及增强的死区时间补偿以及向切换逆变器提供脉宽调制切换信号的反射波减少技术。

公开(公告)号：US06541933B1

公开(公告)日：2003-04-01

申请号：US09996950

申请日：2001-11-20

申请人： David Leggate ,  Russel J. Kerkman

发明人： David Leggate ,  Russel J. Kerkman

IPC分类号： G05B1128

CPC分类号： H02M7/5395 ,  H02P27/08

摘要： Method and apparatus for eliminating greater than twice motor overvoltage by altering modulating signals provided to a PWM controller which in turn provides firing pulses to a PWM inverter. The modulating waves are altered by either tying them to positive or negative DC buses or limiting the maximum magnitudes to a maximum magnitude value above which modulating waveforms are known to cause greater than twice overvoltage. Pass through modulating waveform angles at which waveforms have to be modified are determined as a function of modulating waveform symmetries and the first pass through angle within a waveform cycle.

摘要翻译： 通过改变提供给PWM控制器的调制信号来消除大于两倍的电动机过电压的方法和装置，其进而向PWM逆变器提供点火脉冲。 调制波通过将它们连接到正或负DC总线或将最大幅度限制到最大幅度值来改变，其中已知调制波形导致大于两倍的过电压。 通过波形必须被修改的调制波形角度被确定为在波形周期内调制波形对称性和第一通过角度的函数。

公开(公告)号：US06477067B1

公开(公告)日：2002-11-05

申请号：US09969382

申请日：2001-10-02

申请人： Russel J. Kerkman ,  David Leggate

发明人： Russel J. Kerkman ,  David Leggate

IPC分类号： H02M112

CPC分类号： H02M7/5395 ,  H02M2001/385

摘要： A method and apparatus for reducing distortion at the outputs of an inverter system, the apparatus including a polarity discriminator for determining the polarity of a current passing through an output terminal to a load, a compensator programmed with different upper and lower compensation values and controlled by the discriminator to provide the upper compensation value as an output when the current polarity is positive and providing the lower compensation value when the polarity is negative and a combiner for receiving a modulating signal and the compensation value provided by the compensator and mathematically combining the two signals to generate a modified modulating signal.

摘要翻译： 一种用于减少逆变器系统的输出端的失真的方法和装置，该装置包括用于确定通过输出端子到负载的电流的极性的极性鉴别器，用不同的上限和下限补偿值编程的补偿器，并由 鉴别器当电流极性为正时提供较高的补偿值作为输出，并且当极性为负极时提供较低的补偿值，以及用于接收调制信号的组合器和由补偿器提供的补偿值，并在数学上组合两个信号 以产生修改的调制信号。

公开(公告)号：US5661353A

公开(公告)日：1997-08-26

申请号：US449977

申请日：1995-05-25

申请人： Jay M. Erdman ,  Russel J. Kerkman ,  David W. Schlegel ,  Gary L. Skibinski

发明人： Jay M. Erdman ,  Russel J. Kerkman ,  David W. Schlegel ,  Gary L. Skibinski

IPC分类号： H02K11/00 ,  H02K5/10 ,  H02K5/12

CPC分类号： H02K11/01

摘要： An apparatus reducing capacitive coupling between the stator and the rotor of an electromagnetic machine. The apparatus includes an electrically connective shield positionable between the stator and the rotor, the shield electrically separated from both the stator windings and the rotor when so positioned. A grounder electrically connects the shielder to ground thus substantially reducing capacitive coupling between the stator and the rotor.

摘要翻译： 一种降低电磁机器的定子和转子之间的电容耦合的装置。 该装置包括可定位在定子和转子之间的电连接屏蔽件，当这样定位时，屏蔽件与定子绕组和转子两者电分离。 接地器将接地器电连接到地面，从而大大减少定子和转子之间的电容耦合。

公开(公告)号：US6014497A

公开(公告)日：2000-01-11

申请号：US942339

申请日：1997-10-01

申请人： Russel J. Kerkman ,  David Leggate ,  Gary L. Skibinski

发明人： Russel J. Kerkman ,  David Leggate ,  Gary L. Skibinski

IPC分类号： H02M7/5387 ,  H02P27/08 ,  H02P5/17

CPC分类号： H02P27/08 ,  H02M7/53875

摘要： A method and apparatus for determining the critical dwell time required between firing pulses generated by a PWM inverter to eliminate greater than twice overvoltage on motor supply lines. Critical dwell time is correlated with line parameters including inductance and resistance per unit length and is then provided to a controller to alter voltages provided to a motor to eliminate overvoltage.

摘要翻译： 一种用于确定由PWM逆变器产生的点火脉冲之间所需的临界停留时间以消除电动机电源线上多于两次过电压的方法和装置。 临界停留时间与包括电感和每单位长度电阻的线路参数相关，然后提供给控制器以改变提供给电动机的电压以消除过电压。

公开(公告)号：US5990658A

公开(公告)日：1999-11-23

申请号：US10796

申请日：1998-01-22

申请人： Russel J. Kerkman ,  David Leggate ,  Gary L. Skibinski

发明人： Russel J. Kerkman ,  David Leggate ,  Gary L. Skibinski

IPC分类号： H02M7/5387 ,  H02P27/08 ,  H02M1/12

CPC分类号： H02P27/08 ,  H02M7/53875

摘要： An apparatus for receiving and modifying a PWM trigger signal such that consecutive ON and OFF periods have durations at least as long as a critical dwell time where the critical dwell time is the minimum time required to avoid greater than twice overvoltage. The trigger signals are modified by, each time a trigger signal changes from low to high, providing a minimum pulse signal which remains high for the greater of a critical dwell time or the time over which the trigger signal remains high, when the minimum pulse signal changes from high to low, providing a maximum pulse signal which remains low for a critical dwell time, adding the maximum and minimum pulse times using a logical AND gate and providing the output of the AND gate as a modified trigger signal.

摘要翻译： 一种用于接收和修改PWM触发信号的装置，使得连续的ON和OFF周期的持续时间至少与临界停留时间一样长，其中临界停留时间是避免大于两倍过电压所需的最小时间。 每当触发信号从低电平变化到高电平时，触发信号被修改，为最小脉冲信号提供最小脉冲信号，当脉冲信号为最小脉冲信号时，脉冲信号保持在较大的临界驻留时间或触发信号保持高电平的时间 从高变化到低电平，提供在临界停留时间内保持低电平的最大脉冲信号，使用逻辑与门相加最大和最小脉冲时间，并将与门的输出提供为修改的触发信号。

公开(公告)号：US5671130A

公开(公告)日：1997-09-23

申请号：US701950

申请日：1996-08-23

申请人： Russel J. Kerkman ,  David Leggate ,  Gary L. Skibinski

发明人： Russel J. Kerkman ,  David Leggate ,  Gary L. Skibinski

IPC分类号： H02M7/5387 ,  H02M1/12 ,  H02P5/28

CPC分类号： H02M7/53875

摘要： A method and apparatus for eliminating greater than twice over voltage by altering firing signals provided to a PWM inverter. The signals are altered by either limiting their maximum and minimum on-times or eliminating signal changes in a symmetrical fashion so that the overall fundamental component and magnitude of a resulting low frequency alternating voltage is substantially unaltered.

摘要翻译： 一种通过改变提供给PWM逆变器的点火信号来消除大于两倍过电压的方法和装置。 通过限制其最大和最小导通时间来改变信号，或以对称方式消除信号变化，使得所得低频交流电压的总体基波分量和幅度基本上不变。

公开(公告)号：US5329217A

公开(公告)日：1994-07-12

申请号：US999512

申请日：1992-12-30

申请人： Russel J. Kerkman ,  David Leggate

发明人： Russel J. Kerkman ,  David Leggate

IPC分类号： H02M7/5387 ,  H02P21/06 ,  H02P5/40

CPC分类号： H02P21/0003 ,  H02M7/53875 ,  H02P21/06 ,  H02M2001/0022

摘要： An AC motor drive includes a PWM voltage inverter which is responsive to voltage commands from a synchronous current regulator to control motor armature current and rotor speed. A feedforward voltage is also applied as input to the PWM voltage inverter and it is compensated to boost the effective gain of the inverter when it is operated in the pulse dropping region. The compensation values are precalculated and stored in a table from which they are read during drive operation.

摘要翻译： AC电动机驱动器包括PWM电压逆变器，其响应于来自同步电流调节器的电压命令以控制电动机电枢电流和转子速度。 还向PWM电压逆变器施加前馈电压作为输入，并且当其在脉冲下降区域中操作时，其被补偿以提高逆变器的有效增益。 补偿值被预先计算并存储在驱动操作期间从中读取的表中。

公开(公告)号：US5121043A

公开(公告)日：1992-06-09

申请号：US589846

申请日：1990-09-28

申请人： Russel J. Kerkman ,  Brian J. Seibel ,  David Leggate

发明人： Russel J. Kerkman ,  Brian J. Seibel ,  David Leggate

IPC分类号： H02M7/5387 ,  H02P27/08

CPC分类号： H02P27/08 ,  H02M7/53873

摘要： An open loop, volts/hertz motor drive for control of an induction motor adjusts the voltage command to a sine-triangle PWM inverter to compensate for reduction in PWM inverter gain and to compensate for variations in DC bus voltage in the pulse dropping transition region between PWM operation and six-step operation. The drive includes a microelectronic processor interfaces to DC bus voltage sensing circuitry and to the PWM inverter.

摘要翻译： 用于控制感应电动机的开环，伏特/赫兹电机驱动器调节对正弦三角PWM逆变器的电压指令，以补偿PWM逆变器增益的降低，并补偿在PWM逆变器增益之间的脉冲下降过渡区域中的直流母线电压的变化 PWM操作和六步操作。 该驱动器包括一个微电子处理器接口，直流总线电压检测电路和PWM逆变器。