2
TECHNICAL DESCRIPTION
2.4 DESCRIPTIONS OF THE HYDRAULIC MAGNETS
2.4.1
POWER SYSTEM OF THE HYDRAULIC MAGNETIC PLATE
Energy is provided by the machine’s hydraulic system on which the magnetic lifting system has been installed.
The hydraulic motor is activated when oil is sent to the circuit via the control lever. When the hydraulic motor rotates, the three-phase
alternator produces electricity that is sent to the electronic power supply unit. By means of an alternate/continuous power conversion,
the electronic unit transforms the electricity in input into energy that is suitable to power the magnetic plate, that then generates the
magnetic field required to attract the ferromagnetic parts.
Operation Process
1. The operator in the cabin of the machine activates the hydraulic magnet lever, which sends oil through the hydraulic line towards the
hydraulic magnet.
2. Upon arrival at the hydraulic magnet, the oil turns the hydraulic motor.
3. The hydraulic motor turns the current generator that sends voltage to the electronic control box.
4. The electronic control box evaluates the incoming voltage and if it decides that the voltage value (> 80V input into the electronic
control) is sufficient, then it transfers electricity to the magnetic plate which becomes magnetized, attracting ferromagnetic material.
5. If the electronic control considers the voltage insufficient it does not send electricity to the magnetic plate.
6. To keep the magnet magnetized, it is essential to continue operation from the cabin.
7. If the operator interrupts operation from the cabin, the motor-generator no longer sends voltage to the electronic control, and the
magnet will be demagnetized.
DANGER !
Demagnetization may happen for other reasons related to a decrease in hydraulic performance (flow and/or pressure) of the machine.
For example, the simultaneous use of several hydraulic services or the loss of revolutions of the machine could lead to a drop of oil flow-
pressure to the hydraulic magnet. This can reduce the revolutions of the hydraulic motor, thus reducing the revolutions speed of the
generator and also reducing the voltage sent to the electronic control.
If the hydraulic variations are significant, the electronic control may interpret these changes in voltage as a command to stop
magnetization. For this reason, it is advisable to use an independent and/or permanent service for the operation of the hydraulic magnet
that never falls below the minimum values required.
Division: Tecnoter srl
Hyd. Magnet
LQMI
Ver. T
Page 11/38
Rev: 1.0a_En –
15/07/2018