Application of Frequency Converter on Economical Numerical Control Machine
Abstract
Nowadays, with the advancement and development of modern technology, frequency converters are increasingly used on numerical control machine tools, which not only improves the speed and accuracy, improves the processing quality, but also saves energy and does no harm to the environment. This paper mainly discusses the application of frequency converter on economical numerical control machine for improving the performance and quality of machining.
1 Introduction
With the rapid development of science and technology, frequency converter technology has been developed rapidly, and has been widely used in many fields, which greatly improves the working efficiency and product quality. The use of frequency converters on machine tools has a special significance and advantage in economical numerical control machines in particular. Frequency converter not only can reduce the load of the motor, but also can reduce and strengthen the peak current of starting and stopping, which can improve the running speed and stability of the machine tool.
2 Working principle
The basic principle of the frequency converter is to use a large semiconductor powerhouse to generate a high frequency alternating current, and then by the load current feedback, adjust the magnitude of the output voltage and current, so as to adjust the speed of the motor to obtain the best working state. There are two types of frequency converters: current source frequency converter and voltage source frequency converter.
Current source frequency converter is mainly composed of rectifier, inverter and current voltage regulator. Different from the voltage source frequency converter, its characteristic is to change the voltage through the current, and the inverter output is a fixed current. For the motor, the speed can be adjusted by changing the current.
Voltage source frequency converter is mainly composed of rectifier, inverter and voltage voltage regulator. Its basic characteristics are to change the current through the voltage, and the voltage of the inverter is always constant. For the motor, the speed can be adjusted by changing the voltage.
3 Application of frequency converter on economical numerical control machine
(1) Increase of torque in low frequency. For the servo system of the machine tool, when a frequency converter is connected to the circuit, the large torque generated at the low speed can enable a power machine to operate at a much lower speed than the rated speed, and make the motor speed adjustable. This can improve the low speed performance of the drive motor, thus improving the machining performance of the machine tool.
(2) Improving work efficiency and machining accuracy. The speed and acceleration performance of the motor has a great influence on the machining accuracy and efficiency of the machine tool. By adding a frequency converter, the control system can adjust the speed and acceleration performance of the motor in a more effective way, and when the frequency converter has a better speed performance, it can improve the machining performance of the machine tool and ensure the machining accuracy.
(3) Reduce the impact of the resonance frequency. The resonance of the system can cause a great impact on the accuracy of the machine tool, and the frequency converter can effectively reduce the resonance caused by the mechanical system, which can improve the accuracy of the machine tool and improve the work efficiency.
4 Conclusion
The application of frequency converter on economically numerical control machine has become more and more popular in the field of machine tool manufacturing. It not only improves the speed and accuracy, improves the processing quality and efficiency, but also can save energy, achieve environment protection and energy saving. In the future, the application of frequency converter on economically numerical control machine is expected to be more and more developed.
