公开(公告)号：US20100143157A1

公开(公告)日：2010-06-10

申请号：US12628669

申请日：2009-12-01

申请人： Tero AHONEN ,  Jero AHOLA

发明人： Tero AHONEN ,  Jero AHOLA

IPC分类号： F04B49/06

CPC分类号： F04D15/0066 ,  F04D15/0088 ,  F04D29/669

摘要： A method and a system are disclosed in accordance with a pump controlled with a frequency converter. An exemplary method includes controlling the pump with a frequency converter, the frequency converter feeding a motor connected to drive the pump, providing a torque estimate (Test) and/or a rotational speed estimate (nest) of the motor from the frequency converter, forming one or more features (Feature1, Feature2, Feature3, Feature4) indicating cavitation or likelihood of cavitation of the pump and/or reverse flow of the pump using the provided estimates (Test, nest) and detecting cavitation or likelihood of the cavitation of the pump and/or reverse flow of the pump from one or more of the formed features (Feature1, Feature2, Feature3, Feature4).

摘要翻译： 根据用变频器控制的泵公开了一种方法和系统。 示例性方法包括用变频器控制泵，变频器馈送连接到驱动泵的电动机，从变频器提供电动机的转矩估计（测试）和/或转速估计（嵌套），形成 使用所提供的估计（测试，嵌套）和检测泵的气蚀或气蚀的可能性的一个或多个特征（Feature1，Feature2，Feature3，Feature4），其指示泵的气蚀或泵的空化的可能性和/或泵的逆流 和/或泵从一个或多个形成的特征（Feature1，Feature2，Feature3，Feature4）的反向流动。

公开(公告)号：US20130129481A1

公开(公告)日：2013-05-23

申请号：US13529604

申请日：2012-06-21

申请人： Jussi TAMMINEN ,  Tero AHONEN ,  Jero AHOLA ,  Markku NIEMELÄ

发明人： Jussi TAMMINEN ,  Tero AHONEN ,  Jero AHOLA ,  Markku NIEMELÄ

IPC分类号： G01P15/14 ,  G06F19/00 ,  F01D1/06

CPC分类号： F04D15/0088 ,  F04D27/001

摘要： A method is disclosed for detecting the correct rotational direction of a centrifugal apparatus. The method can include detecting the correct rotational direction of the centrifugal apparatus based on an acceleration test and/or a deceleration test. The detecting of correct rotational direction of the centrifugal apparatus can include comparing an acceleration time (t1,acc) for a first direction with an acceleration time (t2,acc) for a second direction, whereby shorter acceleration time can be interpreted as an indication of correct rotational direction; and/or comparing a deceleration time (t1,dec) of the first direction with a deceleration time (t2,dec) of the second direction, whereby longer deceleration time can be interpreted as an indication of correct rotational direction.

摘要翻译： 公开了一种用于检测离心装置的正确旋转方向的方法。 该方法可以包括基于加速度试验和/或减速试验来检测离心装置的正确旋转方向。 离心装置的正确旋转方向的检测可以包括将第一方向的加速时间（t1，acc）与第二方向的加速时间（t2，acc）进行比较，由此较短的加速时间可以解释为 正确的旋转方向; 和/或将第一方向的减速时间（t1，dec）与第二方向的减速时间（t2，dec）进行比较，从而可以将较长的减速时间解释为正确旋转方向的指示。

公开(公告)号：US20120251292A1

公开(公告)日：2012-10-04

申请号：US13433743

申请日：2012-03-29

申请人： Jussi TAMMINEN ,  Tero AHONEN ,  Jero AHOLA

发明人： Jussi TAMMINEN ,  Tero AHONEN ,  Jero AHOLA

IPC分类号： F04D29/00

CPC分类号： F04D15/0088 ,  F04D27/001

摘要： A method and arrangement for determining the flow rate (Q) produced by a pump, when the pump is controlled with a frequency converter, which produces estimates for rotational speed and torque of the pump, and the characteristic curves of the pump are known. The method includes determining the shape of a QH curve of the pump, dividing the QH curve into two or more regions depending on the shape of the QH curve, determining on which region of the QH curve the pump is operating, and determining the flow rate (Q) of the pump using the determined operating region of the characteristic curve.

摘要翻译： 当用变频器控制泵来确定由泵产生的流量（Q）的方法和装置，其产生泵的转速和扭矩的估计值，以及泵的特性曲线是已知的。 该方法包括确定泵的QH曲线的形状，根据QH曲线的形状将QH曲线分为两个或更多个区域，确定泵在哪个区域运行，并确定流量 （Q），使用所确定的特征曲线的工作区域。

公开(公告)号：US20110200454A1

公开(公告)日：2011-08-18

申请号：US13024705

申请日：2011-02-10

申请人： Tero AHONEN ,  Jussi TAMMINEN ,  Jero AHOLA

发明人： Tero AHONEN ,  Jussi TAMMINEN ,  Jero AHOLA

IPC分类号： F04B49/06

CPC分类号： F04D15/0088 ,  F04D27/001

摘要： An exemplary frequency converter and method are directed to estimating an operation point of a pump when the QH characteristic curve of the pump is known. The frequency converter controls the pump, and a process curve is estimated when a first operation point of the pump is in the nominal range. The process curve defines a head as a function of volumetric flow. A rotational speed of the pump is determined and a QH characteristic curve of the pump is converted to a current rotational speed of the pump based on affinity laws. A second operation point of the pump is estimated by determining an intersection point of the converted QH characteristic curve and the estimated process curve.

摘要翻译： 示例性的变频器和方法涉及当泵的QH特性曲线已知时估计泵的操作点。 变频器控制泵，并且当泵的第一操作点在标称范围内时估计过程曲线。 过程曲线将头部定义为体积流量的函数。 确定泵的旋转速度，并且基于亲和度法将泵的QH特性曲线转换为泵的当前转速。 通过确定转换的QH特性曲线和估计的过程曲线的交点来估计泵的第二操作点。