Overview:
Papermaking is a continuous production process, so continuous and orderly control of the production line has become a bottleneck restricting the quality and yield of finished paper. AC frequency conversion speed control technology is recognized as one of the most promising methods of AC speed regulation because of its excellent speed control performance, significant power saving, and wide applicability in the national economy.
Disadvantages of traditional paper machines:
(1) The commutator wears badly and the breakdown of the commutator is burned, resulting in long downtime;
(2) The maintenance of DC motors is difficult and requires high repair costs.
(3) Speed ​​measuring generator is easy to wear, resulting in low transmission system accuracy;
(4) The DC speed control system is complex and difficult to debug. It is difficult for the average mechanic to transfer a good machine.
After installing the Tovionda converter several major advantages:
(1) The inverter is small in size and light in weight. It is not necessary to add a control panel. It is easy to install, easy to debug, easy to operate, and has little noise and vibration.
(2) High precision of speed regulation, when the load and network voltage change (340-420V), the motor speed does not change, so the adaptability is very strong
(3) It has a complete set of protection functions and high integration, so it has high reliability. The frequency converter has a self-diagnostic function, convenient overhaul, greatly reducing downtime, and naturally increasing production output.
(4) With good energy-saving results, it can save about 30% of electricity, and all investment costs can be recovered in about 6 months.
(5) to achieve stepless speed regulation, starting current is small, no impact on the machinery and power grid, is very suitable for soft-start equipment, such as rewinder, calender and so on.