2
Input
Output
1-phase rectifier
HF inverter
HF transformer
Rectifier & filter
Control circuit
HF arc start
1-
GENERAL REMARKS
1-1 Cutting machine features
This CUT series inverter air plasma cutter is kind of energy-saving metal cutting equipment with high efficiency
and light weight, adopts single tube IGBT HF inverter and advanced control technology. Its advantages are fast
speed, narrow & clean cut, small heat-affected zone, slightly deforming, material-saving, low cost, simple
operation and so on. These cutters possess good static and dynamic characteristics, perfect control function, and
high-frequency arc starting function. The characteristics are as follows:
- Single phase power supply, small size, light weight and easy to operate;
- Air filter pressure-reducing valve is built-in type, portable and easy to use;
- Highly centralized arc energy, good stability, strong cutting ability;
- Fast cutting speed (3~5 times of gas cutting), low cost;
- Narrow, burnished, clean and almost vertical cutting edge;
- Less work piece deformation;
- Continuous adjustment of cutting current;
- HF arc ignition, easy arc starting;
- Strong power grid adaptability and low noise;
- Multiple patented technology, high reliability and durability. 1-2 Functional
principle
This series of cutting machines adopts HF inverter technology. 1- phase input volt is
rectified by rectifier, inverted by inverter composed of single tube IGBT into HF AC,
reduced by HF transformer, rectified and filtered by HF rectifier, then output DC power suitable for cutting.
This progress increases the dynamic response capability, reduces the weight and the size of the
transformer and the reactor, improves the efficiency of
the machine, realizes energy-saving.
The special design of control circuit makes the machines enjoy high cutting
performance despite of changes like power grid voltage fluctuation, cutting cable
length. Features include easy arc starting, narrow, burnished and clean cutting edge, and continuously
adjustable cutting current.
Schematic diagram is shown in Fig. 1-2-1:
Fig. 1-2-1: Schematic diagram
