GGP300KW solid state HF steel tube welder

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: -

Supply Capability:: 30 sets set/month

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1. Applied Range

Steel pipe specification: Round pipe: φ50~φ114mm

Square pipe: under 200×200mm

Steel pipe thickness: 2.5~4.0mm

Welding pipe type: Round pipe/square pipe/rectangular pipe

Welding mode: Induction welding/Contact welding

Typical welding speed: 35~60m/min

2. Main Technical Index of 300kW Solid State H.F. Welder

( 1 ) Designed parameters

Nominal power: 300kW

Rated DC power: Pd=360kW

Rated DC voltage: UdN=450V

Rated DC current: IdN=800A

The whole efficiency: η≥85%

Output power: Pout > 300kW

Designed frequency: f=300~350kHz

MOSFET inverter: 120kW×3

Tank circuit output mode: no welding transformer output, secondary resonance

( 2 )Power distribution requirements

Nominal power: 300kW

Rated DC power: Pd=360kW

Line-in power factor: COSφ≥0.85

Power distribution capacity: S≤420kVA

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

Line-in current: I=650A

l Line-in cable: each phase adopts two pieces of 150mm² copper cable connected in parallel, 3-phase 4-line

( 3 ) 300kW:

With the adoption of water-water heat exchanger

Pressure of inner circulation water: 0.15~0.25MPa

Flow of inner circulation water:25m³/h

Temperature of inner circulation out water: ≤40°C

Temperature of inner circulation back water: ≤55°C

Heat exchanger area: 15m²

Flow of external circulation water: 30m³/h(provided by user)

Temperature of external circulation inlet water: ≤35°C

Temperature rise of heat exchanger external circulation water: ≤15°C

Pressure of inlet water: 0.25~0.3MPa (approximately 2.5~3kg/cm²)

Volume for external circulation water pool: ≥30m³(provided by user)

Q:What are the characteristics of constant voltage operation mode of medium frequency resistance welding machine?: Advantages of intermediate frequency resistance welding machine:The power factor is extremely high (above 0.95), and the required power supply is saved by half compared with the AC resistance welder, and the three-phase balance of the power network is not influenced.Because of the direct current bunching effect and no zero crossing effect, the welding efficiency is improved and the required current is smaller. Therefore, the required cooling water is less, and the spatter is reduced, so that the electrode grinding cycle is lengthened correspondingly.If a transformer power frequency transformer size and weight can be reduced to one - to 1/3.The secondary loop is not affected by the ferromagnetism of the workpiece.There is no alternating electromagnetic force in the DC operation, so the electrode pressure is less.

Q:What is the working principle of the suspension type resistance welding machine?: The spot welding, the workpiece is located between the electrode holder first, and then press the welding switch, "start pressure" program, the electromagnetic valve action, compressed air into the cylinder so that the electrode holder welding, the workpiece clamping action, after appropriate delay, "start welding procedures" at this time, the primary coil of the transformer through the control and power supply connect the SCR welding welding current, secondary

Q:Comparison between medium frequency spot welder and common resistance welder: Long term problems in general resistance welding:Instability of welding quality.Spatter during welding.Lack of effective data monitoring for welding quality.Excessive wear of electrodes.The power factor is low, and a large number of capacitor compensation cabinets are added to improve the power factor.

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