The dynamic compensation method of digital frequency conversion controller specially for industrial metering pump

Abstract

The invention relates to a dynamic compensation method of a digital frequency conversion controller specially for an industrial metering pump. A quantitative dosing and a proportion dosing of the fluid which are called a quantitative and proportion dosing for short, based on the industrial metering pump, are widely used in the fields such as a petroleum, a chemical industry, a water treatment, a food, a pharmacy, an environmental protection, a liquid fertilization. The dynamic compensation method of the digital frequency conversion controller specially for the industrial metering pump, based on a Hall magnetic steel and a Hall sensor, makes an real-time observation of an rotation speed fluctuation of a metering pump driving motor, transforms the rotation speed fluctuation of the motor into a time fluctuation, and then transforms a rotation speed ring into a time ring in the standard vector control. The dynamic compensation method of the digital frequency conversion controller specially for the industrial metering pump, through a closed-loop control, takes a dynamic compensation to the motor speed and makes the motor running smoothly under a pulsating load for reducing the impact and the damage on the mechanical transmission system, reducing an reactive power loss, driving a module heating and improving the accuracy of the quantitative and proportion dosing of the fluid.

Description

technical field [0001] The invention relates to the field of industrial metering pumps, in particular to a dynamic compensation method for a digital frequency conversion controller dedicated to metering pumps. Background technique [0002] Fluid quantitative dosing and proportional dosing (referred to as fixed ratio dosing) are commonly used in petroleum, chemical, water treatment, food, pharmaceutical, environmental protection, liquid fertilization and other fields. The low-level equipment that realizes this process is usually a reciprocating diaphragm metering pump, usually driven by a three-phase asynchronous motor (it is different from ordinary pumps, made of special materials and special transmission mechanisms, and has a high degree of anti-corrosion and anti-leakage Require). Traditional fluid dosing mostly uses a fixed frequency (usually 50Hz) booster pump, throttling solenoid valve and decompression solenoid valve (for safety reasons) to achieve automatic flow adju...

AI Technical Summary

Problems solved by technology

Traditional fluid dosing mostly uses a fixed frequency (usually 50Hz) booster pump, throttling solenoid valve and decompression solenoid valve (for safety reasons) to achieve automatic flow adjustment. The advantages are simple method, mature technology, and easy implementation. The disadvantage is that the interaction of pressurization, throttling and decompression will cause unnecessary energy consumption and heat generation of the drive motor, which will cause impact damage to the equipment and shorten the service life. Seriously, it is difficult to meet the technical requirements of precise proportioning, which in turn affects product quality

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