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A permanent magnet motor is a type of electric motor that uses permanent magnets for the field excitation and a wound armature. The permanent magnets can either be stationary or rotating; interior or exterior to the armature for a radial flux machine or layered with the armature for an axial flux topology.
[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 metal ball up the ramp. Near the magnet was a small hole that was supposed to allow the ball to drop under the ramp and return to the bottom, where a flap allowed it to return to ...
Shares of U.S. steel stocks U.S. Steel (NYSE: X), Cleveland Cliffs (NYSE: CLF), and Steel Dynamics (NASDAQ: STLD) were rallying on Wednesday, up 8.2%, 20.1%, and 13.8%, respectively, on the day ...
A permanent magnet synchronous generator is a generator where the excitation field is provided by a permanent magnet instead of a coil. The term synchronous refers here to the fact that the rotor and magnetic field rotate with the same speed, because the magnetic field is generated through a shaft-mounted permanent magnet mechanism, and current is induced into the stationary armature.
On January 18, 1960, Rea Magnet Wire was purchased by Alcoa. Sales manager Robert L. “Bob” Whearley—another Dudlo employee—was named President in late 1960 when brothers Samuel and David Rea left the company. Jim Vann, who had been president of Rea since 1982, joined with several others to buy Rea Magnet Wire from Alcoa.
An electropermanent magnet or EPM is a type of permanent magnet in which the external magnetic field can be switched on or off by a pulse of electric current in a wire winding around part of the magnet. The magnet consists of two sections, one of "hard" (high coercivity) magnetic material and one of "soft" (low coercivity) material. The ...
US Steel was created in 1901 through a merger when a group led by J.P. Morgan and Charles Schwab, two of the world’s leading financiers of the time, bought the steel company owned by Andrew ...
Paramagnetism, ferromagnetism, and spin waves. Ferromagnetism is a property of certain materials (such as iron) that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet.