2
TECHNICAL DESCRIPTION
2.3
COMPOSITION OF THE HYDRAULIC MAGNETS
Operating Principle
The hydraulic electromagnet is a piece of equipment used for the movement of ferrous material, in particular for the
movement of ferrous scrap metals intended for material recycling. The hydraulic electromagnet is designed for installation on
machines equipped with an auxiliary hydraulic circuit, for example excavators vehicles with hydraulic cranes, etc.
Hydraulic power is derived from the service lines of the hydraulic circuit of the machine, to which the electromagnet must be
connected. In particular, the power circuit line of the hydraulic hammer or the rotation of adequate power is suitable for the
hydraulic connection.
The hydraulic electromagnet uses the hydraulic power supplied by the circuit of the machine using a hydraulic motor coupled with a
synchronous alternator that generates the electricity used to power the magnet.
The hydraulic electromagnet does not have its own controls. It is brought to full power by activating the hydraulic flow in the circuit
to which it is connected (for example, via an activation pedal or button to activate the hydraulic hammer).
The condition of "magnetization" or "demagnetization" of the hydraulic magnet only develops through the movement or non-
movement of the hydraulic oil under pressure. Adequate hosing connects the hydraulic force points between the machine and the
hydraulic magnet.
The electronic power circuit on board provides two possibilities.
A) Standard: consists of an oversize power supply that, thanks to its discharge resistance, prevents dangerous surges that are
generated at the time of demagnetization.
B) Optional circuit with insulated-gate bipolar transistor (IGBT) with a high-power transistor, a device that prevents dangerous
surges that are generated at the time of demagnetization, and an electronic circuit that generates a polarity reversal due to the
rapid demagnetization of the magnet.
The hydraulic electromagnet and the lifting chains are included in the standard supply of the machine.
The mechanical connection of the magnet to the machine takes place through three-arm chain with central arms; the maximum
capacity of the system is 11,000 kg.
The end-user can decide to replace the chains with other systems of attaching to the machine, for example quick couplings. It is the
responsibility of the end user to ensure compliance with the requirements of law and regulations of the attachment system
adopted, and also verification of the adaptability with its own functions and the features of a specific model.
The hydraulic magnet in the version with teeth is always supplied with a cover equipped with a drilled plate for attaching a
bracket.
The bracket must be firmly fixed to the magnet welded plate by means of screws / bolts of adequate size
The coupling of the excavator to the magnet is made through the bracket, as for other common types of equipment.
Division: Tecnoter srl
Hyd. Magnet
LQMI
Ver. T
Page 10/38
Rev: 1.0a_En –
15/07/2018