200kW round iron steel pipe solid state HF welding machine

round iron steel pipe solid HF welder Certificates: CE,BV,ISO9001 Multi-language operation menu Speed-power closed loop ctl

1. Application of 200kW steel tube/pipe welding machine

Pipe specification: 25~76mm

Pipe specification: 3/4~21/2’’

Pipe thickness: 1.5~3.25mm

Pipe type: Round /square /rectangular

Welding mode: Induction welding

Welding speed: 50~100m/min

2. Main Technical Index of 200kW Solid State H.F. Welder

2.1 Designed parameters

 Nominal power: 200kW

Rated DC power: Pd=240kW

Rated DC voltage: UdN=450V

Rated DC current: IdN=530A

The whole efficiency: η>85%

Output power: Pout >200kW

Designed frequency: f=300~350kHz

 MOSFET inverter: 60kW×4

circuit output mode: no welding transformer output, secondary resonance

2.2 Power distribution requirements 

Nominal power: 200kW

Rated DC power: Pd=240kW

Line-in power factor: COSφ0.9

Power distribution capacity: S<270kVA

Power supply voltage: 3-phase 380V/50Hz

Line-in current: I=430A

Line-in cable: each phase adopts 185mm2 copper cable, 3-phase 4-line

 

3. Composition of 200kW steel tube/pipe welding machine

Equipment	Composition / Model	Quantity
200kW 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.

200kW round iron steel pipe solid state HF welding machine