公开(公告)号：US4763059A

公开(公告)日：1988-08-09

申请号：US65529

申请日：1987-06-23

申请人： Paul M. Espelage ,  James M. Nowak

发明人： Paul M. Espelage ,  James M. Nowak

IPC分类号： H02M5/45 ,  H02P21/00 ,  H02P23/00 ,  H02P27/06 ,  H02P5/34

CPC分类号： H02P27/06 ,  H02M5/4505 ,  H02P23/0077 ,  H02P2201/03

摘要： An induction motor drive including a current source inverter system having controlled turn on and turn off semiconductors in a load side inverter selectively places notches in the waveshape of the current supplied to the parallel combination of the motor and a capacitor bank for the minimization of harmonics.

公开(公告)号：US4539514A

公开(公告)日：1985-09-03

申请号：US627000

申请日：1984-07-02

申请人： Paul M. Espelage ,  James M. Nowak

发明人： Paul M. Espelage ,  James M. Nowak

IPC分类号： H02P1/26 ,  H02P1/30

CPC分类号： H02P1/30

摘要： A method of starting an AC motor from any initial speed using open loop control is provided. Sufficient current is provided to the motor so that motor flux can be developed. The frequency provided to the AC motor is varied and the stator frequency at which the motor peak flux occurs is determined. A transition to a control responsive to an external command at approximately the stator frequency at which the peak flux occurred is made.

摘要翻译： 提供了一种使用开环控制从任何初始速度启动交流电动机的方法。 向电动机提供足够的电流，从而可以开发电动机磁通。 提供给交流电动机的频率是变化的并且确定发生电动机峰值通量的定子频率。 进行响应于接近峰值磁通发生的定子频率处的外部指令的控制的转变。

公开(公告)号：US4587474A

公开(公告)日：1986-05-06

申请号：US626712

申请日：1984-07-02

申请人： Paul M. Espelage ,  David L. Lippitt ,  James M. Nowak

发明人： Paul M. Espelage ,  David L. Lippitt ,  James M. Nowak

IPC分类号： H02P27/06 ,  H02J3/40 ,  H02P1/28 ,  H02P1/30

CPC分类号： H02J3/40

摘要： A power conditioner having a source and load converter each using a phase-locked loop to control their respective converter firings achieves synchronization with a supply mains by determining the phase error between supply mains and motor voltages by obtaining the instantaneous difference between the output signals of the source and load phase locked loops. This phase error is passed through a simple gain and summed with a speed regulator setpoint, which now becomes an inverter frequency regulator with the nominal setpoint being the supply mains frequency. The voltage amplitude error between the supply mains and the motor is obtained by comparing the absolute value of the source voltage with the properly scaled absolute value of the integrated motor voltage and this error signal is input to the flux regulator in a synchronous or induction motor controller in place of the normal input when not synchronizing.

摘要翻译： 具有源和负载转换器的功率调节器，每个使用锁相环来控制它们各自的转换器启动，通过确定电源和电动机电压之间的相位误差来获得与供电电源的同步，从而获得 源和负载锁相环。 该相位误差通过简单增益传递，并与速度调节器设定值相加，调速器设定值现在变为变频器频率调节器，标称设定值为供电电源频率。 通过将源电压的绝对值与积分电动机电压的适当比例的绝对值进行比较，得到电源和电动机之间的电压幅度误差，该误差信号输入到同步或异步电动机控制器中的通量调节器 代替正常输入时不同步。

公开(公告)号：US4565953A

公开(公告)日：1986-01-21

申请号：US626982

申请日：1984-07-02

申请人： Paul M. Espelage ,  James M. Nowak

发明人： Paul M. Espelage ,  James M. Nowak

IPC分类号： H02J3/38 ,  H02M1/084 ,  H02M7/17 ,  H02M7/23 ,  H02M7/529 ,  H02P7/28 ,  H02P23/00 ,  H02P27/06 ,  H02P5/16

CPC分类号： H02P27/06 ,  H02M1/0845 ,  H02M7/529 ,  H02P23/0077 ,  Y10S388/903 ,  Y10S388/911 ,  Y10S388/912 ,  Y10S388/917

摘要： A single microcomputer controls the firing time determination for two independent current regulators for two six pulse AC/DC converters which are part of a twelve pulse parallel controlled current inverter (CCI) AC motor drive. A very short high priority interrupt occurs when a motor channel source converter thyristor fires. This interrupt calls a longer, low priority current regulator interrupt informing it that a master channel source converter thyristor has just been fired. The current regulator causes a count to be loaded into a master fire counter and also loads a firing mask into a hardware latch or buffer. When the master fire counter times out the next thyristor pair of the master channel source converter is fired directly out of hardware. Similarly, there is a separate slave channel fire counter loaded after the current regulator is called by a short high priority interrupt when a thyristor in the slave channel source converter fires.

摘要翻译： 两个六脉冲AC / DC转换器的两个独立电流调节器的单个微机控制点火时间确定，它们是十二脉冲并联控制电流逆变器（CCI）交流电机驱动器的一部分。 当电机通道源转换器晶闸管触发时，会发生非常短的高优先级中断。 该中断调用较长的低优先级电流调节器中断，通知主通道源转换器晶闸管刚刚被触发。 电流调节器将计数加载到主火灾计数器中，并将启动掩码加载到硬件锁存器或缓冲器中。 当主火灾计数器超时时，主通道源转换器的下一个晶闸管对直接从硬件中发射。 类似地，当从属通道源转换器中的晶闸管发生触发时，在通过短暂的高优先级中断调用电流调节器之后，会有一个独立的从通道火灾计数器加载。

公开(公告)号：US06337804B1

公开(公告)日：2002-01-08

申请号：US09669273

申请日：2000-09-26

申请人： Eugene F. Kea ,  Fei (Fred) Wang ,  James M. Nowak ,  David Smith

发明人： Eugene F. Kea ,  Fei (Fred) Wang ,  James M. Nowak ,  David Smith

IPC分类号： H02M75387

CPC分类号： H02M7/487

摘要： A multilevel voltage source inverter and related control scheme in which a VSI controller operates in a low frequency mode of operation below a threshold operating frequency to more evenly distribute the duty cycle and thermal loss of the VSI switches. The technique makes use of multiple alternative switching states which achieve the same output voltage.

摘要翻译： 一种多电平电压源逆变器及相关控制方案，其中VSI控制器在低于阈值工作频率的低频工作模式下工作，以更均匀地分配VSI开关的占空比和热损耗。 该技术利用实现相同输出电压的多种替代开关状态。