Magnet overhead cranes
Magnet overhead cranes use magnetism to lift loads, either to increase productivity, to enhance safety, or lift parts that have no anchoring points.
This type of overhead crane is equipped with a magnet hoist or a standard hoist fitted with a magnet as an accessory, so it can be used exclusively for this application, or as a hybrid.
There are 2 main types of magnets: electromagnet or permanent magnet.
Electromagnet overhead cranes
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An electromagnet is a technology that creates a magnetic field around a magnet when an electric current is transmitted. Then, when the power is switched off, the magnet is demagnetized. Magnetism can be quickly activated or deactivated, and its power can vary.
- Advantages of the electromagnet:
- Magnetize and demagnetize fast (higher productivity)
- Magnetic power dimming from 0% to 100% is quick and easy
- Technology is easily accessible
- Affordable
Permanent magnet overhead cranes
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The permanent magnet is a different technology. This magnet needs to receive electrical energy for a few seconds to change its polarity and be magnetized. Once this is done, no more electricity is required until we need to demagnetize it. To do so, the current must be sent again to reverse polarity so it can be demagnetized.
- Advantages of permanent magnets:
- Less power consumption (economical)
- No safety battery system required
Applications and technological solutions:
- This type of equipment can be used for a wide range of applications, and offers several advantages:
- For handling scrap metal without anchoring points,
- For greater efficiency in high-volume production, by saving slinging time,
- Greater safety, by avoiding human intervention during loading and unloading,
- To save storage space, by eliminating pedestrian zones that would be needed for loading and unloading intervention.
- Many possible solutions can be combined:
- Intelligent load limiters
- Magnet groups
- Magnet power selection
- Independent activation of magnet groups
- Anti-sway systems (accessories & safety/anti-sway)
- Integrated crane remote control, including safety functions
Consult the specialists:
Contrary to initial perceptions, it's not enough to buy a standard overhead crane and accessory magnets and then combine them. This type of equipment has its own mechanical and electrical design, and this must be considered when manufacturing it. This implies expertise in crane and magnet systems, as well as their integration.
If you're thinking about integrating magnetism into your handling and lifting system, contact us!
Our experience in recent projects enables us to guide you in this field.