Description

At present, the high frequency welded pipe equipment designed and manufactured in China is a single-loop high frequency device using an electron tube oscillator. By adjusting the anode voltage of the electron tube, the purpose of adjusting the high frequency output power is achieved. The electron tube high frequency welded pipe equipment has many shortcomings such as low efficiency, large volume, preheating before use and short service life of the electron tube.

Therefore, the solid state high frequency power supply using the power MOSFET to form the high frequency inverter is greatly improved in both capacity and frequency. Except in some special applications (such as high frequency dielectric heating), the solid state high frequency power supply can fully replace the electron tube high frequency power supply and become the representative of the new generation of induction heating power.
The main application field of high capacity solid state high frequency power supply is the high frequency welded pipe industry. Due to the severe working conditions in high frequency welded pipe industry in China such as open circuit of the inductor and short circuit of the inductor and the steel pipe, and the high frequency welded pipe power supply is basically in full-load long-term work, so the application of solid state high frequency power in the welded pipe industry represents the highest level of solid state high frequency power supply design and manufacturing.

Technical Features of CXGP-B Solid State High Frequency Welder

The CXGP-B solid state high frequency welder is specially designed for straight seam induction welding. The whole set of equipment consists of inverter unit, AC-DC rectifier unit, central control console, heat exchanger and rectifier isolation transformer.

1. The AC-DC rectifier unit includes rectification, filtering, and logic control section. The three-phase fully controlled thyristor rectifier bridge, smoothing reactance, smoothing capacitor, filtering, etc. ensure smooth output of DC power supply, providing reliable guarantee for subsequent inverter. And equipped with an independent control system, local control of the welder can be manually controlled when the external control fails.

2.The central control console is equipped with a 7-inch LCD man-machine interface, which can visually display the working status of the welder, facilitatingoperation and fault inquiry, and realizingconvenient human-computer interaction.

3.The inverter unit is composed of MOSFET inverter units connected in parallel. The unit design power is 50kw, and the whole unit is accumulated by building blocks (50-1000kw). Each unit has perfect self-diagnosis capability. The overall design facilitates quick repairs. The load automatic matching system does not need to match the transformer, which can effectively balance the working state of the welderand improve production efficiency.
4.The rectifier isolation transformer ensures stable power supply of the equipment and has isolation from the power grid to prevent interference with other power equipment.
5.The heat exchanger is responsible for the cooling of the entire power equipment. The cooling method of external water (normal water) and internal water (distilled water) is used to increase the service life of the inverter cabinet power board. Water-watercooling and wind-watercooling have their own advantages and disadvantages and conditions of use.