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First ideas of a magnetic motor were put forward by Petrus Peregrinus de Maricourt in 1269, who imagined a toothed wheel that is continually moving by the force of magnets. [ 4 ] [ 5 ] A popular example of a magnet motor, although without rotating axis, was put forward by John Wilkins in 1670: A ramp with a magnet at the top, which pulled a ...
Alnico is a NRE permanent magnetic material used in permanent magnet motor applications such as magnetic speed and flow sensors, electric generators, and consumer goods. These magnets exhibit weaker performance in comparison to NdFeB and SmCo counterparts but still maintain high coercivity and are far cheaper due to their lack of rare earth metals.
The motors performed well and led to nearly $1.7 million in sales in 1947. In 1950, Franklin introduced the first electric motor that was fully submersible. The new pump motors were quiet, resistant to freezing, smaller, easy to install, and had a high pumping capacity.
Thermomagnetic motors (also known as Curie wheels, [1] Curie-motors [2] [3] and pyromagnetic motors [4]) convert heat into kinetic energy using the thermomagnetic effect, [5] i.e., the influence of temperature on the magnetic material magnetization.
The current is fed through a conducting liquid. Two permanent magnets are arranged to produce a magnetic field B ap as shown in the figure. The supplied current has a current density (J) and the magnetic field associated with this current can be called "Reaction magnetic Field (b rc)". The two magnetic fields B ap and b rc attempt to align with ...
A magnetic starter is an electromagnetically operated switch which provides a safe method for starting an electric motor with a large load. Magnetic starters also provide under-voltage and overload protection and an automatic cutoff in the event of a power failure.
Wild windings are mostly applied in contactor- and relay coils, small transformers, Ignition coils, small electrical motors, and generally devices with relatively small wire gauges up to 0.05 mm. Achieved fill factors with the use of round wires are about 73% to 80% and are lower compared to orthocyclic windings with 90%.
Electromagnetic propulsion is utilized in transportation systems to minimize friction and maximize speed over long distances. This has mainly been implemented in high-speed rail systems that use a linear induction motor to power trains by magnetic currents. It has also been utilized in theme parks to create high-speed roller coasters and water ...