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The structure and working principle of high-frequency pipe welding machine
Release time:
2022-10-26 11:33
high frequency welded pipe machineIt is an electromechanical system for high frequency welding. The high-frequency pipe welding machine consists of a pipe welding machine and a pipe welding machine. High-frequency welded pipe machine generally consists of two parts: high-frequency generator and feeding device. The role is to generate high-frequency current and control it. The molding machine consists of a squeeze roll frame. Its function is to extrude the parts melted by high-frequency current, remove the oxide layer and impurities on the surface of the steel plate, and make the steel plate completely fused as a whole.
Depending on the specific load, the frequency range of the AC power supply is between 100.1 50KH. In order to adjust the inverters according to the load, all inverters are connected in parallel to a matching transformer. The transformer has several parallel primary windings and one secondary winding. The turns ratio of the transformer is fixed. The output capacitor consists of several parallel capacitor modules. The capacitor is connected in series with the inductor, so the output circuit is also series compensated. The purpose of the capacitor is to compensate the reactive power according to the requirements of the induction coil, and through this compensation, the resonance frequency of the output circuit reaches the required value. The frequency control system is designed to make the triode always work at the resonant frequency of the system. The resonant frequency is determined by measuring the frequency of the output current. This frequency is then used as the time base signal to turn on the triode.
The output power of the induction heating system is controlled by controlling the output current of the inverter. The above control is performed by a power control card for controlling the triode driver. The output power reference value is given by the power reference potentiometer on the IMC control panel, or output to the control system by an external control panel.
After this value is transmitted to the system controller, it will be compared with the DC power value measured by the rectifier unit measurement system. The controller includes a limiting function that calculates a new output current setpoint based on a comparison between the reference power value and the measured DC power value. The output power setpoint calculated by the controller is sent to the power control card, which will limit the output current according to the new setpoint. The alarm system works according to the input signal of the alarm card in the IMC and the signals sent by various monitoring equipment in the IMC and CRU, and the alarm will be displayed on the workbench.
High frequency welded pipe machine
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