Preshrinking machine with Modbus frequency conversion speed regulation system

Abstract

The invention discloses a preshrinking machine with a Modbus frequency conversion speed regulation system. Multiple preshrinking machines are connected with a control center via the Modbus protocol; each preshrinking machine is provided with a frequency conversion speed regulator; the frequency conversion speed regulator comprises a detection module, a control module, a man-machine interaction module, a three-phase power supply, a phase-shift transformer and a five-level inverter; the three-phase power supply, the phase-shift transformer, the five-level inverter and the preshrinking machine are successively connected; all the three-phase power supply, the phase-shift transformer, the five-level inverter and the preshrinking machine are connected with the detection module; the detection module, the control module and the man-machine interaction module are connected successively; and the control module is connected with the detection module, the man-machine interaction module and the five-level inverter. Parameters including the voltage, frequency and fault of a motor in a frequency converter can be monitored in real time, the working state of the frequency converter is mastered timely, and measures can be adopted timely according to change of the parameters to ensure normal operation of the frequency converter.

Description

technical field [0001] The invention relates to a frequency conversion speed regulation system, in particular to a pre-shrinker with a Modbus frequency conversion speed regulation system, and belongs to the field of frequency conversion speed regulation control. Background technique [0002] The pre-shrinking machine is the last process of fabric finishing in the printing and dyeing industry. It is a method of mechanically and physically pre-shrinking the fabric (rubber blanket) to reduce the pre-shrinking rate and improve the hand feeling. The basic configuration consists of four units: wet supply unit, rubber blanket pre-shrink unit, woolen blanket finishing unit and cloth output unit. The wet unit completes the wet preparation before pre-shrinking, so that the fabric has a certain moisture content, which is convenient for fabric pre-shrinking. Its drag part is a rough leather roller. Driven by a 2.2KW motor. The rubber blanket pre-shrinking unit is the core of the mach...

AI Technical Summary

Problems solved by technology

In the practical application of the inverter, the frequency setting method of the inverter is mostly set by the panel or external terminals; At the same time, the location is scattered, the working environment is harsh, and the on-site panel adjustment is difficult to operate, and it is easy to cause problems such as misoperation; and when the analog quantity is adjusted through the external terminal, there are also problems such as low remote adjustment accuracy and inconvenient control; Frequency control is carried out by the switching value of the external control terminal of the inverter, which belongs to stepped speed regulation, which limits the scope of application

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