Скачать или смотреть The working principle of solid state high frequency welding machine

Baoding Jinkai Import & Export Trading Co. , Ltd.
https://www.weldedpipetube.com/
[email protected]
Wechat: 13473122551
TEL:+86-13473122551
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The working principle of solid state high frequency welding machine,
The main circuit structure of the series solid-state high-frequency welding machine is shown in Figure 1, which is a typical AC-DC-AC frequency conversion structure. The rectifier adopts a three-phase bridge thyristor phase-controlled rectifier circuit, and the DC side adopts an inductor and a capacitor to form an LC filter to meet the working requirements of a voltage-type inverter. The voltage-based inverter adopts a modular parallel structure to expand the power supply. Each inverter module is a single-phase MOSFET bridge circuit, and each inverter module is connected to a series resonance tank circuit through a high-frequency matching transformer. The matching transformer realizes power synthesis and impedance matching on the one hand, and electrical isolation of the load and power supply on the other hand. The whole high frequency welding machine has compact structure, small volume, convenient maintenance and low failure rate. In order to effectively and quickly protect the overcurrent fault of the voltage inverter, the company adopts a unique, stable and reliable overcurrent protection circuit to ensure the stability of the inverter.