The early stage of digitalization - the era of simulation
In the analog system: all the parameters are realized by resistors, capacitors, and IC devices. Thus, the tolerance and drift of the RC parameters in the analog system will inevitably lead to changes in the soldering performance. On the one hand, the temperature stability of the analog control is poor. On the other hand, product consistency due to analog control is difficult to guarantee. Therefore, the analog arc welding power supply is too dependent on the accuracy and stability of electronic components. The reliability of the control circuit is low, the interchangeability is poor, the cost is high, the control is difficult, and the precise control of the arc welding power source is not easy to realize, let alone the flexibility. .
The development of digitalization - microcontroller and DSP
The development of digital inverter welding machine is divided into two stages:
In the first stage, the single-chip controlled arc welding power source represented by 80C51 or 80C196 is basically a product of the digital welding machine. Due to the insufficient processing speed of the single chip microcomputer, its main function is to complete the management of the welding machine and the welding parameters. The constant voltage and constant current control in the welding process are completed by the simulated PI controller, and the welding parameters are completed by only using the single chip microcomputer. Given or other relatively simple tasks. Features: With bit processing capability, focus on control and transaction processing functions, and low price.
In the second stage, the application of DSP (Digital Signal Processing) microprocessor and single-chip microcomputer on the welding machine was truly digitalized, which fully reflected the advantages brought by digital control, mainly in: good flexibility. Strong stability, high control precision, and good interface compatibility.
DSP is a kind of microprocessor that is especially suitable for digital signal processing operations. It is mainly used to implement various digital signal processing algorithms in real time and fast. Not only can the problem of the simulated arc welding power supply be completely solved, but also the microscopic control of the arc transition process. DSP devices have high-speed computing power. From the application point of view: DSP is computationally intensive, and the microcontroller is transaction-intensive, DSP can replace the microcontroller, but the microcontroller can not replace the DSP.
Digital development
Digital definition
The digital welder should have the following conditions: Main circuit: Input the inverter unit that must be fully controllable output. Digital input: replaces analog components with digital components. Digital transmission: The relevant welding information (I, U, Ï…, L) is transmitted by means of communication. Digital processing: Hardware with high-speed processing of digital signals. Digital output: digital display, output parameters are precisely controllable. Upgrade: Through the software upgrade, it can meet the welding requirements of different materials, specifications and different gases.
Sigma digital welding machine
The Sigma welder produced by Chengdu Weiya Weida Automatic Welding Equipment Co., Ltd. has the following characteristics: Circuit: Full-bridge IGBT inverter. Digital input: The encoder replaces the digitally transmitted potentiometer in the traditional sense: Can-bus communication. Digital processing: hardware platform composed of DSP digital signal microprocessor and single chip microcomputer. Digital output: digital display, output parameters are precisely controllable. Upgrade: You can upgrade through computer and smart card.
Next page
Filter Bag,PTFE Filter Bag,Teflon Coating Filter Bag
Pengxin Fiberglass Co., Ltd. , http://www.sdfoldingscreens.com