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We are chiefly engaged in manufacturing, supplying and exporting the top-tier HF Solid State Welder in India and overseas. In sync with current industry standards, our Solid State Solid State High Frequency Welder are acclaimed for immaculate quality and operational stability. Offered in variable specifications, these HF Solid State Welder are obtainable from us at nominal prices. Owing to our appropriate choice of packaging and shipment, we execute safe & steady delivery.
Working principle of solid state H.F. welder
Solid state H.F. welder main circuit structure is as follows fig.1; it is a typical AC-DC-AC variable frequency structure. Rectifier adopts 3-phase bridge style thyristor phase-control rectifier circuit, DC side adopts inductor, capacitor to compose LC filter which meet the working requirements of voltage type inverter. The voltage type inverter adopts modularization parallel structure to extend power supply power, each inverter module is single phase MOSFET bridge style circuit connected with series resonance tank circuit by H.F. matching transformer. On one hand, the matching transformer realizes power combination and impedance matching; on the other hand it realizes electric isolation of load and power supply. To put effective and swift protection on over-current malfunction of voltage type inverter, our company introduces special and stable over-current protection circuit which guarantees safe and stable running of inverter.
Electronic automatic load matching technology of solid state H.F. welder
Load matching is to make equivalent impedance of load equal to impedance required (RN=UN/IN) to output rate power. Good matching is guarantee for output and stable working. The welder’s load’s equivalent impedance will change with changing of parts and cause load matching problem. If load is not matched, welder will not output rate power.
When welder and load both are matches, i.e. welder also in best condition and best loading capacity. Now the ways to adjust load matching: adjust parameter after machine stops (induction size, diameter and resonant capacitor) or change parameter by step motor, not well.
Our welder has Electronic automatic load matching technology, this technology can only use on Series welding machine which decided by its features, below figure is automatic load matching and output curve of voltage, current and power output.
Advancements of Electronic automatic load matching technology