How does a permanent load lifting magnet work?
We distinguish here between magnetizing (the device is switched on) and demagnetizing (the device is switched off).
Switching on the lifting magnet
The device consists of two parts, a fixed part and a movable part. The moving part has been rotated through 180 degrees by means of the shift lever, so that the same poles are now placed one above the other. Equal poles repel each other, and the magnetic force lines now flow through the steel poles and through the piece, closing both magnetic circuits. The load is therefore tightened.
Switching off the lifting magnet
Here, opposite poles face each other, creating an internal magnetic circuit within the steel pole of the magnet.