? Solid State H.F Welder Company Information ? ? ? ZSHC Electrical Co., Ltd is the modern enterprise which capable of research and development, production and sales. Our products are working in over 20 provinces, municipalities and autonomous regions. The machines of ZSHC are sold to many other countries beside China, such as Thailand, Vietnam, Indonesia, Albania, Uzbekistan, Syria, India and so on. ZSHC received universal praises from our customers around world by the high quality product and perfect after-sale service.? ? Product Introduction ? 1.Brief Introduction of solid state HF welder ? ? Solid State H.F Welder is specially designed for straight seam welding. It adopts high power components of US IR IRFP460 MOSFET and Germany IXYS Company DSEI60-06A rapid recovery diode.The high power capacitor C and inductor coil L compose current-mode parallel upper-voltage resonance circuit, which doesn’t need output transformer. Thus, it not only improves the efficiency, but also increases the reliability of the welder. ? ? The solid state H.F welder has such distinct features as energy-saving, effective welding, simple structure, easy maintenance, low failure rate, low maintenance cost etc. ? 2. Working principle of solid state H.F welder 3. Performance introduction? 3.1DC Power Unit ? ? DC Power Unit includes rectify, flight wave and control parts. 3-phase full-controllable thyristor rectifying bridge and flight wave reactor, flight wave capacitor, and filter ensure stable DC output and guarantees high quality welding. ? ? Current meter, voltage meter and control system are equipped in the DC power unit. Thus the welder is controllable even without central control unit. ? ? Output DC voltage 0-235V is continuously adjustable and has soft start and time constant setting. ? 3.2 Inverter Output Unit ? ? The inverter part is made up by MOSFET single phase invert unit connected in parallel. The power of each pair of units is 50KW. The pairs of units adopt the building block method to realize power superposition (from 50KW to 1000KW). Each unit has self-diagnostics ability. All the design is to ensure easy installation and maintenance. ? ? Automatic load matching system ensures the most efficiency and lowest mill cost. Furthermore, the welding transformer is not needed. ? ? The protection circuits are specially designed. It can ensure the stability and safety of the welder, even in open and short circuit condition. Also it can afford coils arcing to reduce mill stop. ? 3.3 Central Control Unit ? ? Installed with LCD, power and speed adjust module; indicate the output current and voltage of the DC power unit; armature voltage and current, excitation voltage and current of the DC speed adjust unit. The pipe line can be completely controlled by the central control unit. ? 3.4 Water-water Heat Exchange Unit ? ? Composition:Plate heat exchanger, water tank, pump and electrical control part. ? ? Working principle: The internal cooling is called inner water (distilled water), and the external cooling is called outer water (ordinary water). External and inner water exchange through the plate heat exchanger to reduce the temperature of the inner water. Thus, the equipment inside is cooled. Features: A. Seal circulation, outer water (normal) cools down the inner water (distilled water), no scaling. B. High efficiency of heat radiation, low cost, applicable to large power H.F equipment. C. Reservoir is used for outer water. ? 3.5 Rectifier isolation transformer ? ? It is the input rectifier part of the equipment. It reduces the input voltage from 415V to 200V to ensure stable power supply, at the same time, to insulate the power grid. ? Technical Parameters ? ?

Type	QGT-1-100
Input rated power	150KVA
Output rated power	100KW
Input rated voltage	3φ 380V
Input rated current	230A
Rated DC voltage	235V
Rated DC current	500A
Frequency range	(350-420)KHZ
Efficiency	>85%
Power factor ( Full load )	>0.9
Cooling water pressure	0.25MPa
Cooling water flow	11.7m3/h
Input water temperature	<35
Resonance method	Series-parallel Complex? resonance?

? Supply List ? ?

DESCRIPTION	COMPOSITION	QTY.
QGT-1-100KW ?Solid State H.F Welder (one unit)	DC Power Unit	1
	Inverter Output Unit	1
	Central Control Unit	1
	Water-water Heat Exchange Unit	1
	Rectifier isolation transformer	1
	Air conditioner	1 set

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