Electro permanent magnet

An electro permanent magnet is a special magnet whose external magnetic effect can be switched on and off with a current pulse.

It consists of an electromagnet with a core made of magnetically semi- hard material and a permanent magnet (made of magnetically hard material). If the semi-hard core is magnetized in the opposite direction to the hard core , then their magnetic effects cancel each other out. If the semi-hard core is magnetized in the same direction as the permanent magnet, there is a magnetic effect on the outside. It is therefore a bistable magnet. Electrical energy is only required to switch between the two states.

Electro permanent magnets play a major role in research into modular mini robots, among other things.

See also

• Halbach array

Web links

• Programmable Magnets with Zero Static Power Consumption Enable Smallest Modular Robots Yet. Retrieved June 9, 2014 . 

Individual evidence

1. ↑ Ara Nersis Knaian: Electro Magnetic Connectors permanent and Actuators: Devices and Their Application in Programmable Matter . Massachusetts Institute of Technology. 2010. Retrieved June 9, 2014.
2. ↑ Travis Deyle: Electropermanent Magnets: Programmable Magnets with Zero Static Power Consumption Enable Smallest Modular Robots Yet . HiZook. 2010. Retrieved June 9, 2014.
3. ^ Larry Hardesty: Self-sculpting sand . WITH. 2012. Retrieved June 9, 2014.