Ventilator automatic frequency regulation control method and device

Abstract

The invention discloses an automatic frequency modulation control method of a ventilator. A wind pressure transducer acquires wind pressure data of a ventilator output port in real time and then actual blowing rate can be obtained according to the wind pressure data. The actual blowing rate and the the given blowing rate can be compared to obtain deviation of the blowing rate. The deviation of the blowing rate can be sent to a proportional integral derivative (PID) controller to conduct a PID adjustment. An output signal of the PID controller can be used as a given frequency signal of a ventilator frequency converter. The output end of the ventilator frequency converter is connected with the ventilator to further adjust the rotating speed and the blowing rate of the ventilator. By means of the adoption of the above-mentioned technical scheme of the automatic frequency modulation control method of the ventilator and a device thereof, the automatic frequency modulation control device of the ventilator can display the working state of the ventilator in real time and can adjust the frequency given value of the frequency converter to achieve closed loop adjustment of the blowing rate and ensure that the blowing rate can reach the requirement of the given value, so that the ventilating requirement of a mine well can be met and optimum energy-saving effects and economical benefits can be obtained.

Description

technical field [0001] The invention relates to a frequency modulation control method for a frequency converter of an underground ventilator in a coal mine, in particular to an automatic frequency modulation control method for an axial flow type mine main ventilator frequency converter, and an automatic frequency modulation control device for implementing the method. Background technique [0002] Mine ventilators are key equipment in mines. On the one hand, the normal and stable operation of fans directly affects mine production and workers’ personal safety; Occupies a considerable weight, so it is necessary to effectively control the air volume of the fan to achieve the effect of energy saving. Traditionally, a constant-speed motor is used to drive the fan, and the air volume of the fan is adjusted by adjusting the baffle or valve, which results in large power loss and low operating efficiency. Frequency conversion and speed regulation mine main ventilator is a mechatronic...

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Problems solved by technology

Since the site ventilation conditions are changing at any time, it is impossible to adjust the frequency of the fan inverter in time, and it is difficult to obtain good control performance and energy saving effect

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