AC motors that use frequency converters for speed control generate reactive power and need capacitor banks to compensate for this energy returned to the utility’s grid, even though they solve only 90% of the problem.
In 1831, Michael Faraday discovered that when the magnetic flux in a winding varies over time, a voltage is induced at the terminals thereof; the value of this voltage is absolutely proportional to the speed with which the flux varies. Thus, Faraday’s Law (or Law of Electromagnetic Induction) can be expressed by: Number of turns and rate of change of magnetic flux. We denominate magnetic flux to the number of lines of induction seal4-50/d10 that crosses the surface delimited by a conductor. This greatness is measured in Webbers.
If the poles of a magnet are set to rotate around a loop, the flux in this varies with time, inducing a voltage between its terminals; if they form a closed path, there will be an induced current flowing. From the application of three-phase alternating voltage in the stator, a rotating magnetic field (rotating) will be produced, which crosses the conductors of the rotor.