Description
LTZ pipe welding machine/LTZ pipe welder
Solid state high frequency tube welder for carbon steel, aluminum copper ,stainless steel tube & pipe welding featured with high efficiency and reliable.
Power:60-2400KW
Characteristic:
(1)It has many advantages such as high power factor for welder, small harmonic interference on power grid, protection sensitive, output stability and compacted structure.
(2)Power factor can achieve above 0.93.
Comparison of SCR Welder and High Efficiency Solid State HF Welder
| Comparison parameter | SCR Welder | High Efficiency Solid State HF Welder |
| Controlled components | SCR | IGBT |
| Frequency | 50Hz | 12-14KHz |
| Control mode | Phase shift trigger | PWM modulation |
| Input filtering | Without | L,C |
| Output filtering | L,C | L |
| Output DC | Half wave | High density DC square wave |
| Voltage regulation
precision |
<5% | <1% |
| Current regulation
precision |
<5% | <1% |
| Cooling mode | Water cooling | Water cooling |
| Efficiency AC-DC | <90%,reactive power loss is big | 0.93 |
| Power factor | It changes from 0 to 0.90. | ≥93% |
| Control circuit | Complex, there are synchronous requirement, not easy integration | Simple, special control board, fully enclosed |
| Volume | Large volume, structure scattered, heavy weight | Small volume, compact
structure, light Weight |
| Permitted fluctuation
range for input voltage |
±10% | ±20% |
| The interference to
power grid |
large, difficult to eliminate | Small, easy to eliminate |
| Regulator speed | Slower (ms) | Very fast (μs) |
| Energy saving effect | Better | More better |
