# magnetizing current

## magnetizing current

[′mag·nə‚tiz·iŋ ‚kə·rənt]
(electricity)
The current that flows through the primary winding of a power transformer when no loads are connected to the secondary winding; this current establishes the magnetic field in the core and furnishes energy for the no-load power losses in the core. Also known as exciting current.
References in periodicals archive ?
In the model magnetizing current defines shunt magnetizing reactance and hence inductance of the core.
where [[??].sub.m] is the density of molecular magnetizing currents; [[??].sup.st] is the density of external conductive currents; [[??].sub.m] is the magnetic moment of the molecular magnetizing current [i.sub.m]; s is the area of a microscopic circle bounded by the current [i.sub.m] flow path; [??] is the normal to the microscopic circle in its center; [??](q) is the vector potential of the magnetic field created by the molecular magnetizing currents.
3 describes the coupling between the stator current component [i.sub.sd] that produces the magnetizing current and the stator current component [i.sub.Sq] that produces the torque, necessary for the vector control of the PMSM.
In other words, this transformer uses very little magnetizing losses and needs a very low magnetizing current.
Since the magnetizing current is deduced from the AC armature current, it is so-called the AC-excited memory machine.
9 which is based on a repeated method for the estimation of speed and rotor angle from magnetizing current. Both voltage and current observers estimate magnetizing current of the motor based on equation (3), this estimation with voltage model depends on the accuracy of speed .
"At the top of the curve, at magnetic saturation, if the magnetizing current is stopped, the curve does not trace itself back to the origin.
The ACS310 also features an energy optimizer that minimizes motor losses and noise while reducing motor magnetizing current (especially on partial loads).
With the energy optimizer, when a pump system operates at partial load, the motor magnetizing current is reduced, thus lowering the losses of the motor and drive.
First, the DC component of the magnetizing current is lower than or equal to that of the center-tapped configuration, which makes it possible for the smaller core to be used for the transformer.
The transformer magnetizing current iLm(t) and leakage inductor current iLr(t) are constant during the time interval [t.sub.1]-[t.sub.2].

Site: Follow: Share:
Open / Close