Solid State High Frequency Gem Smelting Equipment

Product Description:

Application Scope                 

The welding of steel tube, stainless steel tube, aluminum tube, copper tube, H-beam and special section tube.

Function Structure

Solid state high frequency welder is mainly applied to high frequency straight seam tube mill line. The high frequency power supply adopts AC-DC-AC frequency-variable structure. The rectifier adopts 3-phase 6-pulse thyristor rectifying, IGBT DC chopping or 3-phase 12-pulse thyristor rectifying. Inverter adopts high voltage large power MOSFET to form full bridge resonant inverter. Inverter output adopts high efficiency ferrite matching transformer to accomplish power synthesis, impedance matching and electric isolation. Resonant tank circuit adopts secondary side series resonance.

The whole set equipment is composed of switchgear rectifying cabinet, inverter output cabinet, circulation soft water cooling system, console and positioning table.

Technical Features

Perfect structure design

1. Independent design of switchgear rectifying cabinet and inverter output cabinet, connected by soft cable, which is convenient for layout at user’s site.

2.Rectifier selects DC chopping to ensure grid side power coefficient≥0.92 and harmonic content is the relative lowest. Adopt 12-pulse thyristor rectifying to eliminate grid side fifth and seventh harmonic, and grid side harmonic current is the lowest.

3.Power combination of the inverter bridge is accomplished by the way of power unit superposition. Each MOSFET power unit is designed to be 50kW/100kW/150kW and slideway drawer structure, which is convenient for installation and repair.

4.High standard electromagnetism compatibility design, electromagnetism radiation meets national standard.

5.High standard electromagnetism compatibility design, electromagnetism radiation meets national standard.

All-digital control system

1.3-D rectifier adopts high cost performance MCU controlling to realize precise synchronism trigger with high control precision and small grid-side non characteristic harmonic.

2. Resonant inverter adopts CPLD to form full-digital control system that is characterized by their automatic constant angle, high phase-lock precise and wide scope of phase-lock.

3.The welder has electronic automatic load matching function with good load adaptability, high electrical efficiency and high power coefficient.

4.The welder has perfect protection function with reliable working and low failure rate.

HMI and fault diagnosis system

1.Adopt PLC and touch screen to form perfect HMI system.

2.Realize integrated automatic control of welder system.

3.Fault display and diagnosis system

Main Technical Parameter