A pressure sensorless constant pressure water supply control method

A pressure sensor, constant pressure water supply technology, applied in pump control, control system, control generator and other directions, can solve the problems of poor control effect and high cost, and achieve the effect of few calibration steps, fast speed and low system cost

Active Publication Date: 2022-05-27
上海熠动动力科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of high cost and poor control effect of the existing pressure sensorless constant pressure water supply control method

Method used

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  • A pressure sensorless constant pressure water supply control method
  • A pressure sensorless constant pressure water supply control method
  • A pressure sensorless constant pressure water supply control method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] refer to Figure 1-Figure 2 , a pressure sensorless constant pressure water supply control method of this embodiment, based on the pump characteristic model established on the three-dimensional curved surface of the pressure measured by the experimental calibration with respect to the flow rate, the rotational speed and the motor q-axis current with respect to the flow rate and the rotational speed, through the pump characteristic model Simulate the feedback of pressure sensor to achieve closed-loop constant pressure water supply control without pressure sensor.

[0040] From 0 to the motor peak speed of 1000rpm, it is divided into speed vectors N at equal intervals: 0, 100, 200, ..., 1000rpm;

[0041] From 0 to the highest flow rate of 350lpm, it is divided into flow vectors L at equal intervals: 0, 50, 100, ..., 350lpm;

[0042] Taking the flow vector L as the abscissa and the velocity vector N as the ordinate, establish the test condition matrix, as shown in the fol...

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Abstract

A pressure sensorless constant pressure water supply control method of the present invention establishes a pump characteristic model of flow rate and flow velocity, and simulates the feedback of the pressure sensor through the pump characteristic model to achieve closed-loop constant pressure water supply control without a pressure sensor. The pressure sensor is omitted, the system cost is low, and the reliability is good; the current value and speed value fed back by the current sensor and the speed sensor are accurate, the constant voltage control algorithm responds quickly, and the precision is high; the calibration steps are few, the speed is fast, and the calibration can be done within 1 working day. It can be completed within; the head command value can be adjusted arbitrarily, in addition to constant pressure control, it can also realize proportional pressure control and other algorithms; it can realize the specified pressure control of any end load.

Description

technical field [0001] The invention belongs to the technical field of water pump control, in particular to a pressure sensorless constant pressure water supply control method. Background technique [0002] The patent CN105839711A applied by Jiaxing Extreme Transmission Technology Co., Ltd. discloses the control method of frequency conversion and constant pressure water supply without pressure sensor, which realizes the function of arbitrarily adjusting the command pressure value at the pump outlet under the condition of no pressure sensor, and avoids a series of problems caused by the use of pressure sensors. It reduces the procurement and maintenance costs of the system and improves the reliability of the system, but this method needs to obtain the power P and frequency F of the current pump through the inverter. If the power P is obtained by using the integrated test equipment, the cost of the system will increase , if the estimated method is used to obtain the power P, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06H02P21/00
CPCF04B49/06H02P21/0003
Inventor 袁羲鑫潘叶李幸付士俊
Owner 上海熠动动力科技有限公司
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