In a steel mill in Hunan, the furnace bottom roller inverter needs to be transformed. The modified inverter includes more than 300 sets of normalizing furnace bottom rollers and tempering furnace bottom rollers, which are important driving equipment for the plant's wide and heavy plate heat treatment line. The specific requirements are as follows:
According to the time when the heat treatment furnace heats the steel plate, the translation speed of the steel plate is set in advance according to the process requirements, and the speed demand of each furnace roller is consistent, and when the steel plate production is finished, the furnace bottom roller still insists on running at low speed.
The maximum length of the steel plate that can handle the transmission on the roller table exceeds 5m and the thickness exceeds 20mm, which has high requirements for large inertia loads.
It is necessary to correctly match the hardware wiring of the original imported brand inverter.
Analysis of the original inverter parameter setting, logic function and sorting of terminal function equipment, and according to the customer's equipment needs, INVT launched the IPE300 series engineering inverter to replace, which can seamlessly replace the port wiring and communication bus control function of the original imported brand inverter, and can also be compatible with it online at the same time. In addition, it has the following advantages:
1. IPE300 series engineering inverter has the function of fast stop DC braking, which can supply the stop brake current in a short time, so that the large inertia load can be parked within 3s.
2. The closed-loop vector control speed has high accuracy (±0.02%), and can adhere to the speed synchronization of multiple roller tables.
3. It has flexible and free programming module and communication expansion function.
1. There is no need to stop production and modify the host controller and communication program to complete the replacement of the inverter
2. After the transformation, the annual fault rate of the system has been reduced from 3.3% to 0.8%, which has improved the reliability of the system
3. Compared with the original imported brand, the acquisition and maintenance cost is reduced, and the service timeliness is higher
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Installation environment: indoor
Ambient temperature
-10°C - +50°C, air temperature change less than 0.5°C/min.
When the ambient temperature exceeds 40°C, please derate by 1% at 1°C.
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