hf welding machine

hf welding machine
Name :hf welding machine for steel pipe 
Specification
Power:100-800KW
Freq , uency:150KHz-600KHz
Characteristic: The low output ripple, the smoothly welding, reaching high
output efficiency as high as 85% and still being able to adjust and
troubleshoot conveniently.

Compostion of hf welding machine includes the following :
1. Switch rectifying Cabinet 
a. The solid state hi frequency welder rectifying cabinet integrate the switch
gear cabinet part and rectifier part.
b. Rectifier adopts all three-phase controlled rectification bridge,the pre-
stage passive filter make sure the equipment has a bigger power factor but
smaller harmonic content.
c. Control circuit use dual-loop regulator of DC voltage and DC current based
on single chip microcomputer, which make sure the DC voltage is continuous
smooth adjustable from 0 to rated value.
d. Complete protection function leads to the equipment running safely and
steadily.
2. Inverter Output Cabinet
a. The inverter part is consist of MOSFET single phase invert bridge in
parallel style.Each bridge’s design power is 120kW/60kW.We adopt building
block oe to pile up power,it's very convenient to install and maintain because
every single bridge board is designed as drawer structure consisted of
slideway.
b. Adopt matching transformer to realize power combination,also adopt sub-
resonance and no-welding transformer output mode.
c. Inverter control circuit adopt fixed-angle-control,with a complete
protection for lose of lock,over-current and over-voltage to make sure the
equipment running safely and steadily.
d. Use sealed box and install water cooling system and air conditioner cooling
.
 
3. Air -water cooling system or water -water cooling system
The circulation soft water cooling system to cool the exothermic parts of
rectifier cabinet and inverter cabinet.
       
 4. Center Control Console
 With PLC and LCD Screen to achieve afar operation of solid state high
frequency pipe mills and power regulation.It has speed-power closed-loop
control function.
 
5. 2-D Ajdustable bracket or 3-D Adjustable bracket 
6. Optical fiber 

Advantages of China high frequency welding machine for steel pipe 
1. Induction high frequency welding is much more efficient compared with vacuum
tube welders.
2. Solid state welders have a compact and modular design.
3. Vacuum tube welders have a lifetime span. Solid state HF welders have
semiconductor components, which has no life limit . So high frequency welder
is more reliable compared with vacuum tube welders. 

Click to Enlarge