In recent years, the majority of inverters used in CNC machine tools in Japan have been dominated by local brands. Companies like Mitsubishi are widely adopted due to their seamless integration with server systems. However, Delta also utilizes Mitsubishi inverters for their reliability and performance, although the cost is significantly higher. In contrast, more cost-effective alternatives have been gaining traction in the market, gradually increasing their share over time.
In the lathe industry, inverters are the most commonly used components. Japanese manufacturers such as Yaskawa, Fujitsu, and Mitsubishi, along with Taiwanese brand Delta, hold a substantial portion of the market. While some domestic inverter brands are also used by machine tool manufacturers, foreign brands still dominate in specialized areas such as grinders and forging presses, where high-performance inverters are essential. Brands like Mitsubishi, Fujitsu, Siemens, and Delta continue to maintain a strong competitive advantage in these sectors.
According to sales data from 2008 and 2009, general-purpose machine tools, especially lathes with complex functions, were performing well. Meanwhile, composite machine tools and large, heavy-duty equipment showed even stronger growth. These machines require a wide range of processing capabilities, and their implementation parts demand consistent speed control. This has led to increased demands on inverter functionality. Domestic inverter manufacturers should take this opportunity to further develop and expand their presence in the machine tool market.
The advancement of frequency converter technology has made its integration into the machine tool industry almost inevitable. As the industry evolves, the trend in machine tool inverters is becoming more defined.
First, there is a growing emphasis on high performance. Most modern inverters now use vector control methods, with only a few exceptions using more advanced control structures and algorithms. Notably, sensorless vector control (SVC) has seen rapid development in recent years. SVC offers cost-effective yet powerful solutions, making it a popular choice and a key direction for future general-purpose inverters.
Second, the ease of control is continuously improving. User needs are shifting towards field devices that offer more intuitive software interfaces, allowing for easier setup and reducing the complexity of the debugging process.
Third, there is an increasing demand for functional modularization and intelligence. As machine tools become more sophisticated, inverters must adapt by offering more flexible and intelligent features to meet evolving industrial needs.
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