Analysis of three development trends of inverters for machine tools

The development trend of inverters for machine tools is as follows: First, high performance. At present, basically all inverters require vector mastering mode, and a small number of different levels of mastering structures and algorithms appear. It is worth noting that speed sensorless vector mastery (SVC) is developing rapidly in recent years. Because SVC can require low interest and high utility disposal plans, it has become the dream specification and development direction in general frequency converters. Second, the ease of mastery is constantly improving. The user's demand for the inverter is gradually transformed into a field device, and a setting tool is added to the software to simplify the debugging process by user operation. Third, functional modularity and intelligent demand are gradually increasing.

It is understood that the number of inverters required for a machine tool can reach 4~5 units. This is enough to foresee the market potential of machine tools. At present, most of the inverters used in China's machine tool market are Japanese brands. For example, Mitsubishi inverters are used in machine tools because they are close to the functions of the servos. Because Delta is close to Mitsubishi, its price is much cheaper. High, the market share has gradually increased in recent years.

In lathe products, the frequency converter has the largest range of applications. However, brands such as Yaskawa, Fuji, Mitsubishi and Taiwan Delta have a large market share. Although some domestic brand inverters have been adopted by machine tool manufacturers, such as Shenzhen Huichuan inverters perform well in lathe applications, they are still foreign in the fields where grinding machines, forging machines, etc. have high functional requirements for inverter products. Brands are mostly, such as Mitsubishi, Fuji, Siemens, Delta and other brands are still in an advantage.

According to the sales data of machine tools in 2008 and 2009, the general-purpose machine tools, especially the lathes with a wide range of functions, are quite severe, while the composite machine tools and large-scale heavy-duty products are better. These machine tools have a wide processing range, and the machine tool implementation components have different activity speeds, and higher requirements are placed on the function of the inverter. Domestic inverter manufacturers should seize the opportunity to cultivate the machine tool market.

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