| With the development of modern industrial production and science technology, cutting technique progressed unremittingly. The high quality cutting work does not get away from the high-quality cutting equipments. The advanced technology and high-quality in the field of cutting are more and more reflected in the high-tech cutting equipment and modernization extent. The plasma cutting technique has a huge function in the production of industry. It can cut all black or non-ferrous, including various high melting point metals and the metals that other cutting methods can not cut, such as stainless, heat-resistant steel, cast iron, copper, aluminum and its alloys. When using non-transfer arc, the workpiece is not link power, under such circumstances, it can cut a variety of non-conductive materials, non-metallic materials such as refactory bricks, concrete and so on.The plasma arc use for cutting is different with the common welding arc. First, its electric arc is compressed. Secondly, the plasma arc use for cutting is longer. Along with the thickness of the cutting work piece increasing, the arc length is also increasing. The work voltage of cutting can be up to 100～200V. The non-load voltage of the cutting power supply can be up to 200～300V, for the stability of arc and igniting arc easily. In this paper, the work voltage of cutting is 95V, and the non-load voltage of the cutting power is up to 230V.With the development of the electric power electronics and the micro-electronics, the new devices, the advanced control technique and the constant introduction of new technology. The cutting technique gets the most advance by leaps and bounds of development. High speed, efficient, digital and the intelligent are the main development direction of the modern cutting technology. In recent years, with the continuous development of inverter technology, cutting inverter power becomes the development trend of cutting power. Inverter cutting machine with small size, light weight, energy saving, high performance control and dynamic response speed, which easily to control in the cutting process.Presently, three-phase cutting machine is very weight, not easy to carry, according to the needs of manufacturers, design the single-phase inverter air plasma cutting power. Detailed analysis the structure and principles about the inverter air plasma cutting power.Optimizate the reasonable layout and design, including the complete research tasks such as the main circuit, the control circuit, pulse width modulation circuit, driving circuit, high-frequency arc circuit, the protection circuit, the process control circuit and cutting power debugging.The inverter power frequency and load sustained rate are high, energy saving, low power consumption, small size, light weight,easy to carry, particularly suitable for outdoor mobile operations.In this paper, analyze the implementation of the program and integral part of the cutting power.This text carries on experiment analysis in the implement and project of power supply. Give the experiment records in the process of data and relate wave form. Carry on analytical research in the process of problems and put forward solution. The experiment results show that the inverter cutting machine main circuit has rapid response-speed, the control circuit is simple and reliable,continuous adjustable cutting current, accurate intuitive, built-in buffer, overhested,over-current, over-voltage protection circuit. The power compared with the flame cutting, use cheap compressed air to cut, low cost and high speed. Compared with the traditional cutting machine, the inverter power has high success rate arc, arc voltage, and energy concentration, cutting ability, and cutting speed, slotted narrow, smooth and small deformation. The design is meet concept and requirements. |
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