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1. 发明授权

US6166928A Method for open-loop and closed-loop control of an electrical drive as well as an apparatus for carrying out the method 失效
标题翻译：用于电力驱动器的开环和闭环控制的方法以及用于执行该方法的装置
公开(公告)号：US6166928A
公开(公告)日：2000-12-26
申请号：US399762
申请日：1999-09-21
申请人： Mukul Chandorkar
发明人： Mukul Chandorkar
IPC分类号： H02M5/44 , H02P23/00 , H02M5/40 , H02M1/12 , H02M7/44
CPC分类号： H02M5/44 , H02M2007/53876 , H02P23/0004
摘要： In a method for open-loop and closed-loop control of an electrical drive, which comprises an asynchronous motor (18) which is supplied by a DC-AC invertor (14) with a downstream sine-wave output filter (15) with an AC voltage at a predetermined circular frequency (.omega.), stable operation with a good control response and reliable damping of natural filter oscillations is achieved in that the voltage at the output of the sine-wave output filter (15) is measured, in that the measured filter voltage is assigned a complex filter voltage vector (E) in a complex reference system rotating at the circular frequency (.omega.), and in that the DC-AC invertor (14) is actuated in such a manner that the complex filter voltage vector (E) corresponds to a predetermined required voltage vector (E*).
摘要翻译：在一种用于电力驱动器的开环和闭环控制的方法中，其包括由DC-AC逆变器（14）与下游正弦波输出滤波器（15）提供的异步电动机（18），所述异步电动机在正弦波输出滤波器（15）的输出处的电压被测量时，以预定的圆周频率（ω）进行交流电压，具有良好的控制响应的稳定操作和固有滤波器振荡的可靠衰减，测量的滤波器电压被分配在以循环频率（ω）旋转的复基准系统中的复数滤波器电压矢量（E），并且DC-AC逆变器（14）以使得复合滤波器电压矢量（E）对应于预定的所需电压矢量（E *）。

2. 发明授权

US5596492A Method and apparatus for de-centralized signal frequency restoration in a distributed UPS system 失效
标题翻译：分布式UPS系统中集中式信号频率恢复的方法和装置
公开(公告)号：US5596492A
公开(公告)日：1997-01-21
申请号：US259881
申请日：1994-06-14
申请人： Deepakraj M. Divan , Mukul Chandorkar
发明人： Deepakraj M. Divan , Mukul Chandorkar
IPC分类号： H02J3/14 , H02J3/46 , H02J9/06 , H02M7/44
CPC分类号： H02J9/062 , H02J3/14 , H02J3/46 , Y02B70/3225 , Y02B70/3291 , Y04S20/222 , Y04S20/248 , Y10T307/615 , Y10T307/664
摘要： An Uninterruptible Power Supply (UPS) for de-centralized operation in a distributed UPS system is described. The UPS system includes a number of UPS units that do not have communication links between them and therefore operate in a de-centralized manner. Coordinated operation in the UPS system is achieved through a controller associated with each UPS unit. The controller identifies when the operating power signal frequency on the UPS system does not correspond to a nominal operating frequency. In response to this condition, the controller generates a frequency reference signal that is used to control the inverter of the UPS unit. The controller continuously estimates the fractional loading of the distributed system by gauging the system response to disturbances, and sets its own operating point accordingly. The controller also ensures that the system operates at its nominal frequency independent of loading. As a result, the inverter produces a power signal at the target frequency and with a power level equivalent to the power level associated with each of the UPS units of the UPS system. The performance of the overall system is not sensitive to small differences in the nominal frequency settings of the individual UPS units.
摘要翻译：描述了用于在分布式UPS系统中进行集中式操作的不间断电源（UPS）。 UPS系统包括多个UPS单元，它们之间没有通信链路，因此以非集中式的方式运行。通过与每个UPS单元相关联的控制器实现UPS系统中的协调操作。控制器识别UPS系统上的工作电源信号频率何时不符合标称工作频率。响应于这种情况，控制器产生用于控制UPS单元的逆变器的频率参考信号。控制器通过测量系统对扰动的响应来不断地估计分布式系统的分数负载，并相应地设置自己的工作点。控制器还可以确保系统在额定频率下独立运行。因此，逆变器以目标频率产生功率信号，功率电平等于与UPS系统的每个UPS单元相关联的功率电平。整个系统的性能对于单个UPS单元的标称频率设置的小差异不敏感。

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