To achieve central monitoring, the network control of the inverter is mainly to connect multiple inverters to the host computer through serial ports, and use the man-machine interface to realize the operation, operation, status monitoring and fault alarm of the inverter.1s. The figure is marked with the output frequency of the century-old product. In the figure (1) mdash; jumping frequency (difference). of Jinan City, Shandong Province, used our company's textile-specific inverter to transform the textile equipment of the plant. When the number of inverters used in the field is large (for example, more than 10), the distance is long, there are many I / O interfaces between the inverter and the PLC, the number of wiring is large, the installation and maintenance workload is large, and the cost is high, it is reasonable to use a fieldbus control system. In recent years, about 20,000 spinning frames,
5,000 roving frames, 100,000 looms, and reed making machine supporting equipment have been produced each year. The textile machinery, which is the basis of the textile industry's technology and equipment, will present a qualitative change. To this end, the inverter must be connected to the open fieldbus to run, stop, frequency and modify functions: the frequency, current, voltage and other status signals and fault signals such as overcurrent, overfrequency, and undervoltage can be used..
The application of inverter speed regulation is becoming more and more common. The application characteristics of the frequency conversion speed regulation technology of textile machinery are mainly introduced. all adopt this solution., Ltd. While meeting industrial requirements, it also saves energy for enterprises, reduces energy consumption, adapts to the current environment of a conservation-oriented society, and improves product competition.I. 3. It can be seen that China is also a large country in the production of textile machinery.
This function is implemented by adjusting the output frequency. This has become a future Technology development trends. It can be seen from the figure (1) that when the inverter drives the traverse motor to reach the upper limit frequency f1 or the lower limit frequency f2, the frequency should abruptly change, drop to or rise, and the abrupt frequency amplitude Delta; f is generally about 1% of the basic frequency f1, The time for the abrupt frequency is theoretically 0, but in fact, because the traverse device and the motor have inertia, it is impossible for the motor speed to change abruptly and there is a transition time, which is usually above 0