Search results
Results from the WOW.Com Content Network
Split-ring resonator is a unit which enhances magnetic permeability and magnetic coupling for metamaterials. Split-ring connector is a ring shaped type of timber connector that is in inserted in routed grooves between timber members in order to reduce stresses to the timbers at the connection points. Commutator (electric), also called split rings.
The split ring resonator was a microstructure design featured in the paper by Pendry et al in 1999 called, "Magnetism from Conductors and Enhanced Nonlinear Phenomena". [11] It proposed that the split ring resonator design, built out of nonmagnetic material, could enhance the magnetic activity unseen in natural materials.
A DC motor is usually supplied through a split ring commutator as described above. AC motors' commutation can be achieved using either a slip ring commutator or external commutation. It can be fixed-speed or variable-speed control type, and can be synchronous or asynchronous. Universal motors can run on either AC or DC.
In a motor, the magnitude of this Lorentz force (a vector represented by the green arrow), and thus the output torque, is a function for rotor angle, leading to a phenomenon known as torque ripple) Since this is a two-pole motor, the commutator consists of a split ring, so that the current reverses each half turn ( 180 degrees).
The resistance of the commutator contacts causes inefficiency in low-voltage, high-current machines such as this, requiring a huge elaborate commutator. This machine generated 7 volts at 310 amps. Although direct current motors and dynamos once dominated industry, the disadvantages of the commutator have caused a decline in the use of ...
This can be used in starting a slip-ring induction motor, for example. A slip ring is an electromechanical device that allows the transmission of power and electrical signals from a stationary to a rotating structure. A slip ring can be used in any electromechanical system that requires rotation while transmitting power or signals. It can ...
Selena Gomez hits the red carpet in all-white satin suit, her diamond engagement ring. Entertainment. People. Vanessa Williams to miss 'Devil Wears Prada' performances after death of beloved mom.
"Dynamo Electric Machine" (end view, partly section, U.S. patent 284,110) A dynamo is an electrical generator that creates direct current using a commutator.Dynamos were the first electrical generators capable of delivering power for industry, and the foundation upon which many other later electric-power conversion devices were based, including the electric motor, the alternating-current ...