At the meeting, Ding Rongjun, executive director and general manager of Chinese Academy of Engineering and CSR Zhuzhou, was elected as the first chairman of the Union. In his speech, he emphasized that in order to realize the rapid development of China's power electronics such as IGBTs, "Baotuan" fought to create a The close industrial alliances that take part in the national industry, academia and research with the link between technology and capital are one of the important measures. The establishment of the alliance is conducive to the integration of all domestic IGBT technologies and industrial resources and the promotion of the IG-BT industry in China. The progressive force of sustainable development.
IGBT, also known as Insulated Gate Bipolar Transistor, is the most advanced power electronic device for power conversion and control. It is known as the "CPU" of modern industrial converter devices. It is used in rail transit, aerospace, new energy The extensive application of strategic industries such as automobiles, wind power generation and national defense industries has even played a role in the daily production of air conditioners and refrigerators in their daily lives. It is an important part of controlling the national economic lifeline and making the national equipment out of control.
IGBT is also the main support technology of energy-saving and low-carbon economy. According to relevant experts, power electronics has now become the link between weak control and high-voltage operation, information technology and advanced manufacturing technology, which can help increase the proportion of advanced production capacity in traditional industries and achieve automation , intelligent upgrade, it is estimated that the use of advanced power electronics technology, enables the motor system efficiency increased by 15% to 30%, if this technology is used in 20% of the motor, the annual saving of up to 2000 One hundred million kilowatt hours, equivalent to 20 of the Three Gorges power station annual power generation.
In recent years, information and electronic technologies represented by microelectronics and computer have been rapidly developed, but the development of power electronics industry is still not enough. For a long time, China's power electronics industry lack of long-term planning and platform support, and did not complete a complete power electronics industry chain, especially the advanced devices represented by IGBT, still did not get rid of the plight of dependence on imports.
The establishment of China's IGBT technology innovation and industry alliance will greatly promote the research and development, manufacturing, promotion and service of China's IGBT industry chain related products, and integrate the advantages and disadvantages of the upstream and downstream of the domestic IGBT industry from materials to applications. IGBT industry development, the establishment of national platform for technological innovation, the formation of a co-innovative power electronics industry system.
CSR Zhuzhou is a leader in China's power semiconductor industry. Since the 90s of the last century, CSR has been planning breakthroughs in the research and industry of advanced power semiconductor devices such as IGBTs. In 2004, CSR successfully developed 5-inch series of ordinary thyristors and rectifiers successfully applied to the HVDC field. In 2006, the company successfully developed the world's first 6-inch thyristor, making China's ultra-high voltage direct current In 2008, CSR started to launch "combo boxing" in IGBT technology and industrialization and became the only company in China that fully mastered the research and development of IGBT chip technology through the implementation of the strategy of "acquisition --- integration --- innovation" Module packaging testing and system applications business. June 20 this year, China's first 8-inch IG-BT professional chip line in China button car fully completed, marking China in the field of high-end electric IGBT chip has broken the long-term foreign monopoly, the overall technology ranks among the advanced international ranks.
What is plasma cutting?
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Plasma cutting uses a plasma torch to cut metals of various thicknesses. The plasma cutter blows compressed air out of a nozzle at high speed and at the same time forms an electrical arc between the nozzle and the metal to be cut. The resulting plasma is hot enough to melt the metal and the speed ensures that the molten metal is blown away from the cut.
What is plasma?
To properly explain how a plasma cutter works, we must begin by answering the basic question [What is plasma? In its simplest terms, plasma is the fourth state of matter. We commonly think of matter having three states: a solid, a liquid, and a gas. Matter changes from one state to the other through the introduction of energy, such as heat. For example, water will change from a solid (ice) to its liquid state when a certain amount of heat is applied. If the heat levels are increased, it will change again from a liquid to a gas (steam). Now, if the heat levels increase again, the gases that make up the steam will become ionized and electrically conductive, becoming plasma. A plasma cutter will use this electrically conductive gas to transfer energy from a power supply to any conductive material, resulting in a cleaner, faster cutting process than with oxyfuel.
The plasma arc formation begins when a gas such as oxygen, nitrogen, argon, or even shop air is forced through a small nozzle orifice inside the torch. An electric arc generated from the external power supply is then introduced to this high pressured gas flow, resulting in what is commonly referred to as a [plasma jet". The plasma jet immediately reaches temperatures up to 40,000° F, quickly piercing through the work piece and blowing away the molten material.
Plasma system components
Power supply -- The plasma power supply converts single or three phase AC line voltage into a smooth, constant DC voltage ranging from 200 to 400VDC. This DC voltage is responsible for maintaining the plasma arc throughout the cut. It also regulates the current output required based on the material type and thickness being processed.
Arc Starting Console – The ASC circuit produces an AC voltage of approximately 5,000 VAC at 2 MHz which produces the spark inside of the plasma torch to create the plasma arc.
Plasma torch – The function of the plasma torch is to provide proper alignment and cooling of the consumables. The main consumable parts required for plasma arc generation are the electrode, swirl ring, and nozzle. An additional shielding cap may be used to further improve cut quality, and all the parts are held together by inner and outer retaining caps.
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