Wed 21 Oct 2020 | 12:17 Beijing
Integrated Solutions
Buildup & Models
 
SOLID STATE HIGH FREQUENCY WELDER 
 
1. Switch Rectifying Cabinet
The switchgear and the rectifier are integrated here into one switch rectifying cabinet, which enables both the switchgear function, and the rectifying control function of the solid state H. F. welders.
 
Incoming MCCB (molded case circuit breaker), incoming current meter, incoming voltage meter (switchable type), and incoming voltage indicator.
 
3-phase full-control thyristor rectifying bridge enables power regulation.
 
Smoothing reactor, smoothing capacitors and filter to increase the smoothing coefficient.
 
2. Inverter Output Cabinet
The inverter circuit consists of MOSFET single-phase inverter bridges connected in parallel, with the power of each bridge designed as 120kW/60kW. Thus the power is accumulated in the style of building blocks. Each inverter board is designed into the drawer structure with slides on both sides, which facilitates installation and repair.
 
The powers is combined through several transformers (called matching transformers) and by direct resonance between the tank circuit resonant capacitors (low voltage) and the inductor, it is transferred to the welding unit via the bus lead, and no welding transformer is needed here.
 
Sealed cabinet with the air conditioner installed on the top of it.
 
3. Central Operator Console
The central operator console allows remote operation and power regulation of the welder. It is equipped with HMI (human/machine interface), indicates DC voltage and DC current of the H. F. welder, and armature voltage and field voltage of the motors of the forming and sizing mill. Design of the central operator console is customized according to different types and quantities of the motors. The power-speed closed loop control / automatic power-speed control function is optional.
 
4. Mechanical Adjustment Device
2-D mechanical adjustment device: applicable for solid state induction welders only. The inverter output cabinet is installed on the adjustment device, so the position of the inductor can be manually adjusted.
 
3-D mechanical adjustment device: applicable for both solid state induction welders and solid state contact type welders. The inverter output cabinet is installed on the adjustment device, so the position of the inductor can be adjusted manually or electrically.
 
5. Closed Loop water cooling system
The GPKL-II cooling system adopts a closed cooling tower, in which the blowers and water spraying hoses on the top will cool the soft water already pumped into the finned tubes. The spraying water (normally purified tap water) is accumulated at the bottom of the cooling tower. It is pumped into the spraying hoses and sprays onto the surface of finned tubes—Part of the spraying water will vaporize when it is falling, thus carries away some heat and partially lower the temperature of the soft water circulating inside. The vapor goes up due to the blower and intensifies the cooling effect when it passes the finned tubes again, and finally goes out of the cooling tower. The other part will fall through the PVC heat exchange layer which is located under the two blowers and above the finned tubes, thus gets cooled by the cold air passing by and finally joins the spraying water at the bottom.
  
 
Models for solid state H. F. welders 
Output Power
DC Power
Welder Model
Rated Voltage
Rated Current
Frequency
E. Efficiency
60kW
80kW
GGP60-0.5-H
450V
180A
450~500kHz
≥ 85%
100kW
120kW
GGP100-0.45-H
450V
270A
400~450kHz
≥ 85%
150kW
180kW
GGP150-0.4-H
450V
400A
350~400kHz
≥ 85%
200kW
240kW
GGP200-0.35-H
450V
530A
300~350kHz
≥ 85%
250kW
300kW
GGP250-0.35-H
450V
670A
300~350kHz
≥ 85%
300kW
360kW
GGP300-0.35-H
450V
800A
300~350kHz
≥ 85%
400kW
480kW
GGP400-0.3-H
450V
1070A
200~300kHz
≥ 85%
500kW
600kW
GGP500-0.3-H
450V
1330A
200~300kHz
≥ 85%
600kW
720kW
GGP600-0.3-H
450V
1600A
200~300kHz
≥ 85%
700kW
840kW
GGP700-0.25-H
450V
1870A
150~250kHz
≥ 85%
800kW
960kW
GGP800-0.25-H
450V
2130A
150~250kHz
≥ 85%
1000kW
1200kW
GGP1000-0.25-H
450V
2670A
150~250kHz
≥ 85%
1200kW
1440kW
GGP1200-0.25-H
450V
3200A
150~250kHz
≥ 85%
 
Notes: The frequency can reach 800kHz if special design is requested by the customer.