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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.
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.
[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 ...
A permanent-magnet synchronous motor (PMSM) uses permanent magnets embedded in the rotor to create a constant magnetic field. The stator carries windings connected to an AC electricity supply to produce a rotating magnetic field (as in an asynchronous motor). At synchronous speed the rotor poles lock to the rotating magnetic field.
USA TODAY 3 hours ago Marion Bowman Jr. is set to be executed in South Carolina today. What to know. Bowman was sentenced to death for the Feb. 16, 2001, shooting death of 21-year-old Kandee Martin five days before her son's second birthday.
A superconducting magnet is an electromagnet made from coils of superconducting wire. ... 1999 marked the first commercial application using a pulse tube cryocooler ...
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 ...
The magnetic field is often created by a current-carrying coil of wire around the core. The use of a magnetic core can increase the strength of magnetic field in an electromagnetic coil by a factor of several hundred times what it would be without the core. However, magnetic cores have side effects which must be taken into account.