As the machine tool processing a wide range of different parts, different processes, the use of different tools, in the lathe industry, the largest use of the inverter . Therefore, the main motion of the machine should be able to speed, machine tool users of the frequency converter products more attention to the role of speed. At present, most of the inverter used in China's CNC machine tools are Japanese brands. Inverter is the use of power semiconductor devices on-off effect of power frequency power conversion to another frequency control device.
At present, most of the inverter used in China's CNC machine tools are Japanese brands, such as Mitsubishi inverter closer to the server because of the function, and therefore more in the machine tool used; and because of its proximity to Mitsubishi Delta, but the price is much cheaper, Cost-effective, in recent years the mall share also gradually added.
In the lathe industry, the largest use of frequency converter. However, Japan's Yaskawa, Fuji, Mitsubishi and Taiwan's Delta and other brands occupy a larger market share. Although there are some domestic brands inverter machine tool manufacturers choose, but in the grinder, forging machine tools and other functions of the inverter industry pleas for higher areas, as usual, foreign brands such as Mitsubishi, Fuji, Germany's Siemens, Delta, etc. Brands are often at an advantage. According to the sales data of machine tools in 2008 and 2009, the availability of general-purpose machine tools, especially the complicated and complicated lathe inventory, was appropriate and the complex machine tools and large-scale heavy-duty product malls were good. These machines have a wide range of machining, machine tool implementation components have a different speed of activity, the inverter also made a higher function requirements, domestic inverter manufacturers should seize the opportunity to cultivate the machine tool market.
Inverter is the use of power semiconductor devices on-off effect of power frequency power conversion to another frequency control device. Mainly by the rectifier (AC to DC), filter, inverter (DC to AC), brake unit, drive unit, the detection unit micro-processing unit and other components. In general, the inverter must have several basic capabilities: 1, energy saving; 2, speed control; 3, the protection can be divided into the following two categories:
(1) Automatic detection of abnormal conditions, such as over-current stall prevention, regenerative over-voltage stall prevention.
(2) Blocking the power semiconductor device PWM control signal after abnormality detection, so that the motor will stop automatically. Such as over-current cut off, over-voltage regeneration cut off, semiconductor cooling fan overheating and instantaneous power failure protection.
Inverter in the machine tool industry
As the machine tool processing a wide range of different parts, different processes, the use of different tools, the implementation of the machine tool requires a different speed, so the main movement of the machine should be able to speed, machine tool users of the inverter speed control More attention.
The spindle is an important part of the lathe. It plays an important role in improving the processing efficiency, expanding the processing material range and improving the processing quality. The frequency converter is mainly used in the spindle speed regulation system. At present, the cost-effective inverter for customers, so the inverter is very common in the use of lathe.
Universal inverter in order to successfully use the machine tool industry must have two important considerations: First, the choice of speed sensorless vector control products, the second is to design the speeding operation to improve low-speed torque.
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