发明名称 |
Method for improving sensorless flow rate estimation accuracy of pump driven with frequency converter |
摘要 |
A method in connection with a pump driven with a frequency converter. The method comprises measuring and storing the flow rate ( Q Mean ) when the pump is in operation, storing the used rotational speed ( n Mean ) and torque ( T Mean ) of the pump during the measuring of the flow rate ( Q Mean ), determining from the provided characteristic curve that is transformed into the stored rotational speed ( n Mean ), the torque ( T Manufacturer ) corresponding to the measured flow rate ( Q Mean ), calculating a bias value of the torque ( T Bias ) by comparing the torque determined from the characteristic curve ( T Manufacturer ) and the stored torque ( T Mean ) of the pump, and using the bias value of the torque ( T Bias ) in the determination of the operating point of the pump. |
申请公布号 |
EP2505845(A1) |
申请公布日期 |
2012.10.03 |
申请号 |
EP20110160200 |
申请日期 |
2011.03.29 |
申请人 |
ABB OY |
发明人 |
AHONEN, TERO;AHOLA, JERO;TAMMINEN, JUSSI |
分类号 |
F04D15/00;F04D27/00;G01F1/66 |
主分类号 |
F04D15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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