Why doesn’t the magnetic force of lifting magnet disappear after power failure?
Your choice of lifting magnet, even if safety is not your primary consideration (even if we think it should be), it should be a very important factor in your overall consideration. People who are looking for a lifting magnet with high safety, still doubt whether the magnetic force will disappear after power failure. Because they are currently using electromagnet lifting equipment. The materials being carried can suddenly fall off from mid-air during the operation when it encounters a power limit or a power failure, which is very dangerous.
Once there was this customer who was very interested in our electro permanent lifting magnet after visiting our website. But he was afraid that the same situation would happen and wanted to know why the magnetic force of the electro-permanent lifting magnet will not disappear after power failure.
Let’s start with the principle of the electromagnet:
The lifting electromagnet is a lifting device that uses the electromagnetic force generated by the coil wound on the iron core to handle steel materials. If you want to keep handling the material you must provide a constant and stable current. And if the current is too small or cuts off, it will cause the material to fall.
Many companies used a power outage magnetizing device to extend the demagnetization time of electromagnets. They want to avoid accidents caused by sudden power failure. However, the extension time of an electromagnet magnetization device is very short (usually 30 minutes only). It can not eliminate the hidden dangers fundamentally. Besides, many small enterprises can not afford the high cost of it. Therefore, it is necessary to choose a lifting magnet with high safety and high efficiency at the same time.
The lifting magnet with high safety: principle of the electro-permanent magnet
The electro-permanent magnet is an upgraded product of the electromagnet. It is controlled and transformed by the electrical control system on the distribution of its internal magnetic circuit. So the permanent magnetic field is balanced within the system itself. And it needs electrical energy only in the moment of magnetization or demagnetization. If power failure occurs, it does not lose magnetism. That’s the core reason why the electro permanent magnet is the lifting magnet with high safety.
Why not choose the lifting magnet with higher safety:
Because of the above-mentioned advantage, once the electro permanent magnet is developed and produced, it is loved by the majority of enterprises. With the electro permanent magnet technology, HVR MAG has developed lifting magnets for structural fabrication and engineering machinery, magnetic platens for injection molding machines, CNC magnetic chucks, and magnetic grippers for robotic arms. If you are looking for a lifting magnet with high safety, please contact us: export@hvrmagnet.com
