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System and method for intelligently controlling rotation speed of variable-frequency fan

A technology of intelligent control system and variable frequency fan, applied in engine control, pump control, mechanical equipment, etc., can solve problems such as stillbirth, shorten control time, and improve control precision and accuracy.

Inactive Publication Date: 2015-06-10
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some control environments that require both pressurization accuracy and pressurization speed, the customer's requirements cannot be well met, which makes many designs aborted.

Method used

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  • System and method for intelligently controlling rotation speed of variable-frequency fan
  • System and method for intelligently controlling rotation speed of variable-frequency fan
  • System and method for intelligently controlling rotation speed of variable-frequency fan

Examples

Experimental program
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Effect test

Embodiment 1

[0056] The ambient temperature is 21°C and the atmospheric pressure is 101kPa. The device connection method is as figure 1 . The set pressure is 250, 500, 750, 1000, 1250, 1500, 1750, 2000Pa. The first pressurization is the common PID pressurization method. When the predetermined set pressure is 250Pa and 500Pa, the recorded voltage values ​​at the input terminals of the inverter are 1.18V and 1.45V respectively. It is inferred from the regression formula that the input voltage value of the inverter is 1.72V when the pressure is 750Pa. Set the constant coefficient Δ=0.2. That is, when the pressure is increased to 750Pa, the initial voltage signal of PID control is 1.52V. When the predetermined pressure is 750Pa, the input signal voltage of the inverter is 1.70V. When the subsequent set pressure values ​​are 1000, 1250, 1500, 1750, and 2000Pa, the estimated values ​​are 1.96V, 2.23V, 2.48V, 2.72V, and 2.94V according to the regression formula. The actual inverter input va...

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Abstract

The invention relates to a system and a method for intelligently controlling a rotation speed of a variable-frequency fan. The system comprises a detection module, a controller and an execution part, wherein the detection module consists of a data acquisition card and a sensor, the controller consists of a computer, and the execution part consists of a frequency converter and a fan; the signal output end of the computer is connected with the signal input end of the frequency converter, and the signal output end of the frequency converter is connected with the signal input end of the fan; the signal output end of the fan is connected with the input end of a static pressure box, and the output end of the static pressure box is connected with the input end of the sensor; the signal output end of the sensor is connected with the signal input end of the data acquisition card, and the signal output end of the data acquisition card is connected with the signal input end of the computer. On the basis of comprehensive consideration about various factors influencing the pressure of the static pressure box, a linear relationship between the working condition parameters of one static pressure box and the rotation speed of the fan is established, so that control signals are greatly regulated, the speed of a rotation speed control system is greatly increased, and the accuracy of the rotation speed control system is greatly improved.

Description

technical field [0001] The invention relates to an intelligent control system and method for the rotational speed of a variable frequency blower fan, in particular to an air pressure control system and method that requires high speed and high precision and changes linearly according to different working conditions. Background technique [0002] The variable frequency fan speed intelligent control system is a device that realizes air pressure control according to different working conditions. Compared with manual technology, air pressure intelligent control technology has been widely used in air pressure control system because of its higher control precision, faster speed and less tolerance. The control of the variable frequency fan speed intelligent control system involves speed adjustment, intelligent optimization algorithm, signal acquisition, signal processing and communication control. In the application environment, the speed is the most important or even the only adju...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00
CPCF04D27/004F05D2270/44
Inventor 姜岩李欣金鑫
Owner SHENYANG POLYTECHNIC UNIV
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