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1. Application of 100kW steel tube/pipe welding machine
Pipe specification: 10~38mm
Pipe specification: 1/8~1’’
Pipe thickness: 0.6~1.5mm
Pipe type: Round
Welding mode: Induction welding
Welding speed: 70~100m/min
2. Main Technical Index of 100kW Solid State H.F. Welder
2.1 Designed parameters
Nominal power: 100kW
Rated DC power: Pd=120kW
Rated DC voltage: UdN=450V
Rated DC current: IdN=270A
The whole efficiency: η>85%
Output power: Pout >100kW
Designed frequency: f=450~500kHz
MOSFET inverter: 60kW×2
circuit output mode: no welding transformer output, secondary resonance
2.2 Power distribution requirements
Nominal power: 100kW
Rated DC power: Pd=120kW
Line-in power factor: COSφ0.9
Power distribution capacity: S<130kVA
Power supply voltage: 3-phase 380V/50Hz
Line-in current: I=220A
Line-in cable: each phase adopts 95mm2 copper cable, 3-phase 4-line
3. Composition of 100kW steel tube/pipe welding machine
Equipment | Composition / Model | Quantity |
100kW solid state HF welder | Switchgear rectifying cabinet | 1 set |
Inverter output cabinet | 1 set | |
Central operation console | 1 set | |
Connecting optical fiber | 1 suit | |
Mechanical adjustment device | 1 set | |
Air/water cooling system (optional ) | 1 set |
4. Brief introduction for steel tube/pipe welding machine
4.1 Switchgear rectifying cabinet
Designed with integration of switchgear cabinet and rectifying part, besides achieving switchgear cabinet functions, it also has rectifying control functions of solid state H.F. welders.
l Installed line-in switch, line-in current meter, voltage meter (can be switched) and line-in voltage indication lamp;
l Installed 3-phase full-controlled thyristor rectification bridge to realize power adjustment of the HF welder;
l Installed flat-wave reactor, flat-wave capacitor and filter to improve the flat-wave coefficient.
4.2 Inverter output cabinet
l The inverter part is consisted of MOSFET single-phase inverter bridge connected in parallel. The power of single-phase bridge is 60kW; the inverter bridge adopts the building block method to realize power superposition. Every piece of bridge plates is designed in the shape of a drawer, which is very easy to install and repair;
l The matching transformer is adopted for power combination, also it adopts the output method by of secondary resonance and non-welding transformer, tank circuit resonance capacitor (low voltage) resonates with the inductor directly, and the output pole plate offers required power transmission for pipe welding;
l Adopted sealed equipment case, installed with air conditioner.
4.3 Connecting optical fiber
The switchgear rectifying cabinet and the inverter output cabinet are connected with optical fiber, so as to make sure control system can not be disturbed by HF signal, which enhances the reliability of equipment.
4.4 Circulation soft water cooling system
Circulation soft water is used as cooling water with temperature and water level indicator and protection, which can perfectly accomplish the cooling work for rectifying cabinet, inverter cabinet and resonance tank circuit. air/water cooling system are optional.
4.5 Central operation console
It realizes solid state H.F. welder remote operation and power regulation, installed with LCD which indicates armature voltage, field voltage indication and of DC drive and DC voltage, DC current indication of H.F. welders.
4.6 Mechanical adjustment device
Applied to install inverter output cabinet and adjust inductor position.
2-D is for induction welding mode;
3-D is for contact welding mode.
100kW round iron steel pipe solid state HF welding machine