ABSTRACT
Eddy current losses (ECLs) and stray losses are present in every transformer. The primary stray and eddy losses are due to the 60 Hz frequency currents and related thickness of the conductor thickness of the windings. These loss components increase with the square of the frequency and square of the magnitude of the eddy currents. If the inverter feeding the power into the step-up transformer is producing more than the standard level of harmonics, then the stray and eddy losses will increase. ECL in the core has a fairly high power factor resistance loss proportional to the square of the rms value of the excitation voltage, independent of the shape of the wave. If this voltage is held in accordance with the average voltage measured by a voltmeter, the observed ECL will be a multiple or a fraction of the true ECL by a factor K.
