Since the load is kiln end fan, the following requirements are requested on the frequency converter:
1. Air volume and air pressure adjustment
2. "Material collapse" in the pipeline will cause the motor to overcurrent or even trip ("Material collapse" means that the dust in the kiln tail pipe of the production line will collapse and fall when it adheres to a certain thickness during the production process, causing the dust concentration in the pipeline to increase， the resistance increases and the negative pressure increases, which may cause the motor overload)
3. Grid voltage fluctuation
4. The environment is harsh and dusty
5. In cement production equipment, the kiln end fan is the most important load on the production line. It is necessary to ensure the continuous and stable operation for a long time.
Nancal provides customers with the following products:
10kV 2200kW high-voltage AC drives, model is NC HVVF 10/10-2200
10kV 1370kW high-voltage AC drives, model is NC HVVF 10/10-1370
10kV 3050kW high-voltage AC drives, model is NC HVVF 10/10-3050
10kV 1250kW high-voltage AC drives, model is NC HVVF 10/10-1250
10kV 630kW high-voltage AC drives, model is NC HVVF 10/10-630
Nancal updated the control algorithm to solve the problem of pipe "collapse", which ensure the continuous production. Meanwhile Nancal's NC HVVF series inverters can guarantee non-stop operation when the grid-side voltage drops to 40%.