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Best Fit Similar Sensorless Transition Means or Techniques for Pump Differential Pressure and Flow Monitoring

A technology of pump pressure difference and flow rate, which is applied in the field of controlling pump operation

Active Publication Date: 2019-05-10
FLUID HANDLING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Accordingly, the inventors of the present application have also discovered and recognized the need to formulate system pressure and flow directly from motor readouts such as power, current, torque, speed, etc. for pump sensorless converter reconfigurations. Any theoretical expression is quite challenging work

Method used

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  • Best Fit Similar Sensorless Transition Means or Techniques for Pump Differential Pressure and Flow Monitoring
  • Best Fit Similar Sensorless Transition Means or Techniques for Pump Differential Pressure and Flow Monitoring
  • Best Fit Similar Sensorless Transition Means or Techniques for Pump Differential Pressure and Flow Monitoring

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Embodiment Construction

[0040] figure 1 A hydronic sensorless pump control system is shown, for example, in which the invention can be implemented, having a centrifugal pump in combination with a flow controller connected to a pipeline. exist figure 2 The sensorless conversion for the pump differential pressure and flow rate with the equivalent hydronic system characteristic coefficient variable at pump discharge and motor power at the other end of the motor drive is schematically shown in associated with speed. exist image 3 The pump, system and power characteristic curves for a closed-loop system with static suction pressure and the corresponding pressure equilibrium points for the pump and system pressures at steady state are presented schematically in .

[0041] Considering a closed loop system with static suction pressure, it can be found at the steady state equilibrium point of pump and system pressure (which is at image 3 Solve for the system flow rate and pressure at the motor speed a...

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Abstract

The invention provides a device including a liquid circulation sensorless pumping system, characterized by a signal processor or processing module configured to receive signaling containing information regarding power and speed. Motor readout and also information about pump and system characteristic equations and empirical power equations based on polynomial best fit functions and pump similarity laws based on the pumps manufactured constructed from the manufacturer's published pump curves; and determining corresponding signaling based on receipt of said signaling containing information regarding pump or system pressure and flow at motor readouts of said power and speed. rate information.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Application No. 61 / 976,749, filed April 8, 2014, entitled "A Best-fit affinity sensorless conversion means for pump differential pressure and flow monitoring" (Attorney Docket No. 911-019.014-1 / / F-B&G-X0012US01), the provisional application is hereby incorporated by reference in its entirety. [0003] This application also relates to a series of technologies developed by one or more of the inventors and disclosed in the following applications: [0004] 1) U.S. application NO.12 / 982,286 entitled "Method and apparatus for pump controlling varying equivalent system characteristic curve, AKA an adaptive control curve" filed on December 30, 2010 (Attorney Case No. 911-019.001-1 / / F-B&G-1001, which was announced as U.S. Patent No. 8,700,221 on April 15, 2014; [0005] 2) U.S. Application No. 13 / 717,086 entitled "Dynamic linear control methods and apparatus for variable speed pump cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F9/00
CPCF04B49/065F04C14/08F04B2203/0208F04B2203/0209F04C2270/02F04C2270/80F05D2260/821F05D2270/335F04D15/0088F05D2270/304
Inventor A·A·程J·J·顾G·A·斯科特
Owner FLUID HANDLING