Steel production - Power supply
Special safety sensors are installed to monitor the pig iron ladles are properly seated in the laminated hooks. The sensors and a radio transmitter installed to transmit the sensors' signals are located on the traversing gear of the crane system and require a 12 V DC power supply. Supplying power via a trailing cable is not an option, because the temperature of the pig iron in this area is about 1300 degrees Celsius. Consequently, power is supplied via a 12 V battery, which is also located on the traversing gear. A solution that recharges the battery during operations is sought to avoid the failures and downtimes resulting from the necessity to date of having to change the battery.
The permanent magnet three-phase synchronous generator DSG P 63.07.4 utilizes the rotating motion of the rope pulley of a lifting beam as a source of energy. The generator is driven via a rotating sheave and speed increasing gearbox with each lifting and lowering motion of the crane. The generator supplies alternating voltage analogous to the speed; a rectifier converts the AC voltage to DC voltage. The charge controller monitors the charge status and the flow of energy to the battery. Implementing an autonomous auxiliary power supply in the form of well-coordinated overall solution gains valuable production time and safeguards operational reliability. The previous solution of having to change the battery every 14 days is a thing of the past.