Electromagnets can be classified in different ways. However, as permanent magnet manufacturers, our current expertise and business scope in this field are focused on flat-faced electromagnets. These artificial magnets feature a flat contact surface and an island pole electromagnetic circuit design, making them suitable for holding flat, smooth ferromagnetic objects.
Within this category, we mainly classify them by shape: rectangular and round. This classification is also closely related to our traditional business of pot magnets, due to their similar structure and application. In manually operated or automated systems, rectangular and round flat-faced electromagnets are commonly used for temporarily picking and placing ferromagnetic parts. They are available in different sizes and pull forces, and can also be modified or customized according to specific requirements.
Electromagnets work by generating a magnetic field when electric current flows through a coil. When a ferromagnetic core is placed inside the coil, the magnetic field becomes much stronger, allowing the electromagnet to attract and hold ferromagnetic objects during operation. In holding applications, this controllable magnetic force is especially useful because it can be switched on when the part needs to be picked up or fixed in place, and switched off when it needs to be released. The holding force can also be influenced by factors such as current, coil design, core material, and the contact condition between the electromagnet and the workpiece.
See how electromagnets work in detail.
Electromagnets and permanent magnets differ mainly in how magnetic force is generated and controlled. Electromagnets produce magnetic force only when electric current flows through the coil, which means their magnetic field can be turned on and off and adjusted as needed. Permanent magnets, by contrast, generate magnetic force without an external power supply and provide a constant magnetic field during use. In practical applications, the choice between them depends on whether controllability, continuous magnetic force, energy consumption, and operating conditions are more important in the design.
See the differences between electromagnets and permanent magnets in detail.
Choosing the right electromagnet depends on several factors, including the required holding force, workpiece condition, voltage, duty cycle, size limitations, and mounting method. In practical applications, the contact condition between the electromagnet and the ferromagnetic part can also affect the actual holding performance. It is therefore important to consider not only the nominal pull force, but also the operating mode and installation requirements of the application.
For flat-faced electromagnets, shape, dimensions, pull force, and electrical specifications should be selected according to the actual working conditions. If you need help selecting a suitable electromagnet based on your application, feel free to contact us for technical support and product recommendations.
