Reasons for the malfunction of electric permanent magnet suction cups

There are many reasons that can cause damage to the electric permanent magnet suction cup. We will analyze the reasons for the electric permanent magnet suction cup being burned out, including the following:

1. Besides overvoltage, it is caused by insulation breakdown of the internal coil. The insulation level formed during the manufacturing process of embedded wires decreases and burns out after a period of time. Another type is cutting corners and materials that do not meet the standards.

2. Circular AC or DC, first pay attention to whether there is overvoltage, which can easily cause overcurrent burning or inherent short circuit in the tire. Electromagnetic suction cups that cause short circuits during wire embedding are generally not easily burned out.

3. There is a short circuit or insulation damage in the inner coil of the suction cup, or the voltage properties and specifications are incorrect.

4. This situation is prone to occur when water enters or is grounded, as well as when the air gap with the armature is too large.

5. The electric permanent magnet suction cup is protected by electronic charging and demagnetizing devices in front of it. Even if the voltage applied by the user is too high, it will be protected on the spot. If it needs to be burned, only the transformer of the charging and demagnetizing controller can be burned, and the electromagnetic suction cup coil will not be burned.

6. Check if there is AC entering the rectification circuit of the power supply.

7. The insulation of the coil is not good because there is coolant on the table or there is a problem with the circuit. Excessive direct current.

8. The position of the workpiece is not suitable and the magnetic circuit is abnormal. Either the circuit is abnormal or there is a short circuit between turns.

9. I guess this suction cup is made of alternating current, because the current of direct current is basically a constant value, and its magnitude is determined by the resistance value of the copper wire inside the suction cup. The magnitude of AC current is not only related to the coil resistance but also to the size of its air gap. If the armature inside the electromagnetic suction cup does not move or gets stuck during use, the current inside the coil will remain high. Prolonged overload current will cause the coil temperature to rise, insulation damage, and burn out the permanent magnet suction cup.

10. If the magnetic circuit of the iron core coil excited by the suction cup AC power is not closed, the current will be three times that of when the magnetic circuit is closed. It will heat up after a long time