● 逆变部分由MOSFET单相逆变桥并联组成，单桥功率设计为120kW/60kW，逆变桥采用积木式方式完成功率叠加，每块桥板均设计为由滑道组成的抽屉式结构，方便安装与维修；

● 采用匹配变压器完成功率合成，采用次级谐振、无焊接变压器输出方式，由槽路谐振电容器（低压）与感应器直接谐振，通过输出极板实现钢管焊接所需功率的传递。

● 采用密封机箱，安装顶置空调。

Inverter Output Cabinet

● The inverter part is consisted of MOSFET single phase invert bridge in parallel style. Each bridge’s design power is 120 kW/60kW. We adopt building block mode to pile up power, it’s very convenient to install and maintenance because every single bridge board is designed as drawer structure consisted of slideway.

● We adopt matching transformer to realize power combination, also we adopt sub-resonance, no-welding transformer output mode and make resonance directly by tank resonance capacitor (low voltage) and inductor to achieve steel pipe welding power transmission by output lead.

● Use sealed box and install overhead air conditioning.

●安装进线刀开关、进线电流表、电压表（可切换）和进线电压指示灯。

●安装三相全控晶闸管整流桥，实现高频焊机功率调节。

●安装平波电抗、平波电容及滤波器，以提高平波系数。

Switch Rectifying Cabinet

We integrate the switch gear cabinet part and rectifier part, besides the functions of switch cabinet, this design also has rectifying control functions on solid-state H.F. welders.

● Install incoming disconnect switch，incoming current meter，voltage meter (switchable) and incoming voltage indicator light.

● Install 3-phase full-controllable thyristor rectifying bridge to achieve power regulation of H.F. welders.

● Install flight wave reactor，flight capacitor and filter to increase flight coefficient.

实现固态高频焊机的远方操作和功率调节，安装有液晶显示屏，具有直流调速柜的电枢电压、励磁电压指示和高频焊机的直流电压、直流电流指示。可选择加装速度——功率闭环控制功能。本操作台根据配套直流调速柜的类型和数量不同，存在设计差别。

Central Console

The console achieves remote control and power regulation of solid-state H.F. welder, installed with LCD; also it has indicators of armature voltage, field voltage on DC speed regulation cabinet and indicators of DC voltage, DC current on welder. Installation of power-speed closed loop control function is optional. The console has design difference according to different types and quantities of matching DC speed regulation cabinet.

●二维机械调整装置：适合于感应焊方式，用于逆变输出柜的安装与调整，可手动调整感应器位置。

●三维机械调整装置：适合于感应焊/接触焊方式，用于逆变输出柜的安装与调整，可电动及手动调整感应器位置。

Mechanical Adjusting Equipment

●2-D mechanical adjusting equipment: For induction welding mode, applied with installation and adjustment of inverter output cabinet, the inductor position can be adjusted manually.

●3-D mechanical adjusting equipment: For induction/contact welding mode, applied with installation and adjustment of inverter output cabinet, the inductor position can be adjusted by electric or manual.

GPKL-Ⅱ型循环软水冷却系统采用闭式冷却塔结构，冷却用软水在密封水箱及冷却管道中流动，由顶置风机 喷淋水方式冷却内循环软水，其工作原理为:利用水蒸发时吸收热量的原理使被冷却软水冷却。喷淋水贮于冷却塔底部，软水在闭式冷却塔的散热盘管内进行封闭循环，喷淋水由喷淋系统泵经水分配系统和喷淋嘴喷淋在盘管表面，一部分水被蒸发吸走热量，从而降低管内软水的温度。热空气中的水和未蒸发的水被挡水板截住并流经PVC热交换层，PVC交换层中的水被流过的空气冷却，温度降低，落入冷却塔底部。

适用范围：60kW～1200kW感应加热电源。

Circulation Soft Water Cooling System (air-water cooler)

Model GPKL-Ⅱcirculation soft water cooling system adopts closed cooling tower structure. Cooling soft water flow in sealed water tank and cooling pipes. The inner circulation soft water is cooled by overhead fan and water-spray method using the principle of absorbing heat when evaporation. The spray water store at the bottom of cooling tower, soft water circulate inside the closed cooling tower’s heat dissipation pipe, spray-water spray at pipes’ surface by spray-water distribution system and sprayer through spray system, some heat is taken by dissipation and soft water temperature inside the pipe go down accordingly. The cut board stops water in hot air and undissipated water, make them flow through PVC heat exchange layer, the water in the layer is cooled by air, then temperature goes down and fall down to the bottom of the tower.

Apply range: 60kW～1200kW induction heating power supply.

◆ 固态高频焊机主要设计指标

Main Design Index of Solid-state H.F. Welder

EFD集团成立于1996年1月，由当时世界上感应加热领域内的两大知名感应设备制造商：挪威ELVA公司和德国FDF公司合并而成。1998年，法国主要感应设备制造企业之一的CFEI公司也加盟该集团，由此，EFD集团成了世界上重要的供应感应加热设备的跨国性股份制集团企业之一。总部位于挪威。

主要产品：感应热处理设备、工业热加工系统、便携式感应加热设备、高效率固态高频焊机、

经营范围：退火、固化粘接、感应钎焊、锻造、淬火、熔炼、预热、后热、矫直校平、回火、高频焊接、感应加热等离子产品、

应用领域：汽车行业、航空业、电缆和导线行业、家用设施、冶金和铸造行业、管材行业