1：Working Principle & Energy Consumption

Electromagnetic Lifting Magnets operate on electromagnetic induction. When electric current flows through the internal coil, it generates a strong magnetic field to lift ferrous materials. The magnetic force can be adjusted by controlling the current, making it suitable for handling different weights and materials. However, they require continuous power supply to maintain magnetic force, leading to higher energy consumption. A sudden power loss can cause immediate demagnetization, posing safety risks—often requiring backup power or mechanical safety devices.

Electro-permanent Lifting Magnets combine permanent magnets with electromagnetic coils. A brief electrical pulse magnetizes the permanent magnets to generate a strong holding force, while a reverse pulse demagnetizes them to release the load. The key advantage is that they retain magnetic force without continuous power, reducing energy consumption by over 90%. They are highly reliable in power outages and ideal for high-risk environments (e.g., steel mills, ports). However, their magnetic force is fixed and cannot be adjusted dynamically.

2： Applications & Performance Comparison

Electromagnetic magnets are best for high-frequency, short-cycle lifting, such as scrap metal handling or small component transfers. They are lightweight and cost-effective but require regular maintenance due to coil heating. Additional safety measures are needed in power-sensitive operations.

Electro-permanent magnets excel in long-duration heavy-load lifting, such as steel plates or large molds. They offer superior safety, durability, and resistance to harsh conditions (heat, dust, etc.). However, they are heavier (due to permanent magnets) and have a higher initial cost—though long-term energy savings offset this.