What role does an electromagnetic lifting magnet play?

　Lifting Electromagnetic ClampsProduced based on electromagnetic principles, the magnetic force is generated by exciting the internal coil. Workpieces in contact with the panel surface are tightly attracted through the magnetic conductive panel. Demagnetization is achieved by deactivating the coil, causing the magnetic force to dissipate and the workpiece to be removed.

Application of Lifting Electromagnetic Clamps: Used for workpiece fixation during the processing of ironwork, such as on grinding machines, FYMC series electromagnetic tool grinding machines, gantry milling machines, and gantry planers. Advantages of Lifting Electromagnetic Clamps:

Adhesive Suction Power:

Electromagnetic strong suction cups boast a powerful grip, reaching up to 16 kg/cm². The magnetic field distribution is even and adjustable, suitable for a variety of heavy-duty, rough, and precision machining applications. Standard strong suction cups have weaker suction, uneven distribution, and cannot meet the requirements of heavy-duty machining operations.

2. Processing Precision:

Electromagnetic suction cups offer a strong gripping power without the need for continuous power supply, ensuring no heat generation during continuous operation, thereby preventing workpiece thermal deformation. Additionally, even if the workpiece extends beyond the worktable, the powerful and uniform disc suction ensures high machining accuracy.

However, the magnetic force of a standard electromagnetic lifting magnet requires a continuous power supply, which generates heat after operating for a period of time. This not only causes the workpiece to deform due to heat but also diminishes the magnet's force, compromising the accuracy of the machining process.

3. Performance:

Electromagnetic strong suction cups can be used continuously. Even when working for over 20 hours a day without interruption, they do not malfunction and require no maintenance. Standard suction cup magnets lose their strength after about six months, and lifting electromagnetic suction cups can only operate for a few hours each day, making them prone to wear and necessitating frequent replacement and maintenance of internal parts.

4. Operational Efficiency:

The use of standard strong suction cups requires a significant amount of workpiece adjustment time, accounting for 40%-50% of the entire processing process. Clamping and positioning can often result in noticeable errors, leading to a high rate of waste products and extremely low efficiency. The electrically controlled strong suction cups feature automatic auxiliary positioning. With just a single button press, workpiece clamping or release can be completed in 0.3 seconds, significantly boosting production efficiency.

Hazard of Electromagnetic Clamping to Generators Themselves:

The generator lost magnetic flux, resulting in increased flux leakage at the stator end, which led to overheating of the end components and the end core.

After asynchronous operation, the generator's equivalent reactance has decreased. Consequently, the reactive power absorbed from the system has increased, leading to overheating of the stator windings.

The differential frequency current in the generator's rotor winding generates additional losses in the winding, causing the winding to heat up.

4. For large direct-cooled steam turbine generators, the average asynchronous torque is relatively low, with an even lower inertia constant. The rotor is significantly asymmetric both on the vertical and horizontal axes. Due to these reasons, the torque and active power of the demagnetized generator will oscillate dramatically under heavy loads. This impact is more severe for hydraulic generators.