Medium Frequency Resistance Welding Transformer Series | High Efficiency Welding Transformer

Resistance Spot Welder Transformer

Our medium frequency resistance welding transformer series is a core supporting component for medium frequency spot welding equipment, designed with mature water-cooled structure and nano-amorphous iron-based core technology. Featuring high power transmission, low loss, stable DC output and excellent thermal stability, this welding transformer is widely applicable for multi-layer metal plates, thick plates and various precision resistance welding scenarios, delivering reliable and high-efficiency welding performance.

Major Functions & Core Advantages

The medium-frequency transformer is composed of a rectifier module, high-quality iron core, precision windings and professional water cooling circulation system. Adopting low secondary voltage and high current output design, it supports intermittent cyclic operation with strong power transmission capacity, perfectly matching the working characteristics of resistance welding machines.

It supports two operating frequencies of 1kHz and 4kHz and outputs stable DC current. The secondary circuit features low inductive effect, which effectively improves overall thermal efficiency. Different from traditional AC transformers, its DC output concentrates welding heat on the welding spot, greatly reduces the welding heat-affected zone, and avoids excessive thermal deformation of workpieces. This advantage is particularly prominent in the welding of multi-layer metal materials and thick plates, ensuring neat and firm welding joints.

The transformer core adopts premium nano-amorphous iron-based strip material, possessing multiple superior physical properties including high magnetic flux density, high permeability, high Curie temperature and excellent thermal stability. Meanwhile, it effectively reduces eddy current loss and core loss, with higher magnetic induction intensity than conventional transformer cores, realizing energy-saving, low-consumption and long-term stable operation of the equipment.

Product Technical Parameters

Model	Rated Power (kVA)	Duty Cycle	Primary Voltage (V)	Operating Frequency (Hz)	Rated Current (kA)	Max Current (kA)	Turns Ratio	Insulation Class	Secondary No-load Voltage (V)
Y90	75	50%	500	1K/4K	15	23	55:1	F	9
Y120	120	50%	500	1K/4K	21	38	50:1	F	10
Y180	160	50%	500	1K/4K	30	43	50:1	F	10
Y250	250	50%	500	1K	42	55	40:1	F	12.5
Y350	300	50%	500	1K	55	65	40:1	F	12.5

Application Advantages

This series of medium frequency welding transformers adopts Class F insulation, with safe and reliable operation and long service life. The complete water cooling circulation system ensures continuous heat dissipation during high-power welding, avoiding equipment overheating. With diversified models from 5000A to 65000A, it can meet the welding demands of different workpieces from thin sheets to thick plates, and is widely used in automobile manufacturing, hardware processing, electronic accessories, metal sheet welding and other industries.

Resistance Spot Welder Transformer