solid state high frequency welder for steel pipe making

We have supplied more than 2,500 sets of GGP-series solid state high frequency welder for steel pipe making to the users in China and also the abroad. The highest power can reach to 1800kW and 800kHz for highest frequency which is the first level in China.

For main electronic parts, we adopt the latest product of IXFN38N100Q2 38A/1000V large power MOSFET and DSEI 2×61-12B 60A/1200V fast recovery diode from Germany IXYS comapny with long service lifetime and less loss.

1. solid state high frequency welder for steel pipe making adopts the most advanced fixed-angel phase-locking control technique, inverter working status do not change as load tank circuit change, which keep the work at the best small sensitivity resonance status all the time, welder works stably with high efficiency.

2. solid state high frequency welder for steel pipe making has advanced functions like high/low lock-lost protection, frequency upper limit/lower limit protection, invert over-current, tank circuit over-voltage and etc. Also more accurate and efficient on open-circuit, short-circuit, arcing of inductor malfunction, it guarantees welder stable running.

3. Besides regular protections, each inverter bridge adopts multiple protections, such as DC side over-current, AC side over-current, AC side over-voltage and etc. It realizes protection redundancy, guarantees inverter safe running.

4. Rectifier side control circuit adopts singlechip technology which solves automatic phase-recognize successfully, i.e. no requirements on 3-phase power supply input line; thyristor trigger circuit adopts all digital equal interval triggering, it reduces non-characteristics harmonics furthest and power net pollution.

5. Rectifier control circuit has soft startup, soft stop function which prevents welder over-current and over-voltage caused by rising too much of current and voltage when startup/stop.

6. It adopts matching transformer to realize electric isolation and load matching of solid state high frequency welder for steel pipe making with merits of whole set high efficiency, easy matching regulation.

7. The welder has large power allowance, when in good load matching conditions it allows running under 110% rated power for a long time at least.

With the adoption of PLC and touch-screen to compose HMI control system which is high intelligent and easy operation.