Two Advantages of Electromagnet Over Permanent Magnet

Magnets come in two main types: permanent magnets and electromagnets. As its name suggests, a permanent magnet is always magnetized — think of a kitchen magnet that stays stuck to a refrigerator door for years. An electromagnet is different; its magnetism works only when powered by electricity. Although an electromagnet is more complicated than a permanent magnet, it has useful and important advantages.

Two Advantages of Electromagnet Over Permanent Magnet

Two Advantages of Electromagnet Over Permanent Magnet

Control of Magnet Strength
One of the most important features of an electromagnet is the ability to change its magnetic force. When no electric current flows through the magnet’s wires, it has no magnetic force. Put a little current in the magnet, and it has a small force. A large current gives the magnet a bigger force, able to lift or pull heavier objects. The ability to turn magnetic force on and off has many important uses, ranging from simple household gadgets to giant industrial machines.

Greater Magnet Power
The pulling power of a permanent magnet is limited to the type of metal from which it’s made. Currently, the strongest permanent magnets are made of a combination of iron and a metal called neodymium. Although these permanent magnets are strong, the best electromagnets are more than 20 times stronger.

Electromagnet Uses
Small electromagnets are used in electronic locks, such as those found on an automobile or the main door of an apartment building. Scrapyard cranes have powerful electromagnets that lift metal car bodies with ease. Magnetic Resonance Imaging machines use very powerful electromagnets to produce highly detailed images of the human body. The strongest electromagnets are those used in scientific research to study the properties of matter.

Permanent Magnet Uses
You can find small permanent magnets in toys, handheld gadgets such as electric razors, and clasps for bracelets and watches. Larger permanent magnets are useful in household appliance motors and in stereo speakers. The electric motors in hybrid vehicles use very strong permanent magnets.

24 Volts Bipolar Electromagnets

24 Volts Bipolar Electromagnets

24 Volts Bipolar Electromagnets, DC Parallel Pole Electromagnets, Rectangular parallel pole electromagnets bipolar, Terminal Block DC Electric Magnets China Supplier 24 Volts Bipolar Electromagnets have widely spaced poles with a continuous magnetic field down the full length of the magnets face. These two-pole Bipolar Electromagnets generate a parallel magnetic field which is advantageous for lifting […]

 

12 Volts DC Parallel Pole Electromagnets

12 Volts DC Parallel Pole Electromagnets

12 Volts DC Parallel Pole Electromagnets, Bipolar Electromagnets, Rectangular parallel pole electro magnets, Terminal Block Rectangle DC Parallel Pole Electric Magnets China Supplier 12 Volts DC Parallel Pole Electromagnets have widely spaced poles with a continuous magnetic field down the full length of the magnets face. These two-pole Bipolar Electromagnets generate a parallel magnetic field […]

 

Rectangle Electromagnets

24 Volts DC Rectangle Electromagnets

 24 Volts DC Rectangle Electromagnets, Rectangular Flat-Faced Electromagnets, Block Electromagnets Permanent Electromagnets, Standard Rectangle & Square Electro Magnet Block electromagnets (or rectangle electromagnets): Electromagnet in rectangular shape, which is used for holding, carrying and fixing of ferromagnetic work pieces. Magma standard rectangular electromagnets maximum length is 1000mm. Our standard block electromagnets can also give you some […]

 

Square Electromagnets

Flat Surface Rectangular & Square Electromagnets

Flat Surface Rectangular & Square Electromagnets, Square Permanent Electromagnets, DC Rectangular Flat-Faced Electromagnets, Rectangular Island Pole Electromagnets China Supplier HSMAG Rectangular & Square Electromagnets are an island pole designed series. When energized with a Storch D.C. Power Supply, the Square & Rectangle Electromagnet’s outer edge (or pole) produces a North or South Magnetic field which surrounds […]