Virtual temperature sampling control device and method for induction heating

Abstract

The invention provides a virtual temperature sampling control device and method for induction heating. The system includes an induction heating inverter, a data acquisition part and a data processing control part; the induction heating inverter is provided with a power switching tube use for generating square wave signals; and the data acquisition part acquires the square wave signals, analyzes the duty ratio of the square wave signals, converts analysis results into analog signals, compares the analog signals with a temperature threshold value, determines a difference value, performs amplification and PID setting on the difference value, and transmits PID setting results to the induction heating inverter. With the virtual temperature sampling control device and method for induction heating of the invention adopted, improvement on the accuracy and stability of temperature data sampling can be better benefitted. The virtual temperature sampling control device and method for induction heating have strong anti-interference ability. An acquisition device can be flexibly configured according to actual situations. The virtual temperature sampling control device and method have stably high precision and can be conveniently configured in induction heating devices of different types and specifications.

Description

technical field [0001] The invention belongs to the technical field of control, and in particular relates to a virtual temperature sampling control device and method for induction heating. Background technique [0002] The promotion of the concept of green and efficient industrial production in the new era has made induction heating widely used in many fields such as heat treatment of metal surfaces, welding, and metal thermal processing due to its unique advantages. In the working process of induction heating, the coupling of electromagnetic field and temperature field makes the temperature acquisition and processing of the workpiece extremely complicated, and the change of temperature will affect the best state of zero current and zero voltage of the switching device of the inverter equipment, even damage the equipment. [0003] There are a variety of temperature acquisition systems in the prior art, but most of these systems require cumbersome analog data acquisition poi...

AI Technical Summary

Problems solved by technology

In the working process of induction heating, the coupling of electromagnetic field and temperature field makes the temperature acquisition and processing of the workpiece extremely complicated, and the change of temperature will affect the best state of zero current and zero voltage of the switching device of the inverter equipment, even damaged equipment

[0003] There are a variety of temperature acquisition systems in the prior art, but most of these systems require cumbersome analog data acquisition points set according to the temperature field, and obtain temperature feedback signals through high-cost data processors. The anti-interference ability of the temperature signal is crossed, which affects the quality of the processed product and the reliable operation of the equipment

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