How much does the addition iron losses relate with the supplied power?

Iron losses, also known as core losses or magnetic losses, in electrical machines (like transformers, motors, and generators) do not directly relate to the supplied power in a linear fashion. Instead, these losses depend on the magnetic properties of the core material and how the device is operated. Iron losses consist primarily of two components: hysteresis losses and eddy current losses.

1. Hysteresis Losses: These losses depend on the material’s hysteresis loop and the frequency of the magnetic field’s reversal. Hysteresis losses increase with the frequency of the magnetic field changes and the volume and type of the iron core. They are relatively constant for a given frequency and magnetic material but can increase with higher magnetic flux densities.

2. Eddy Current Losses: These losses are caused by circulating currents induced in the iron core by the alternating magnetic field. Eddy current losses vary with the square of the frequency and the square of the maximum flux density. They also depend on the material’s electrical conductivity and the core’s geometry; specifically, they are inversely proportional to the resistivity of the core material and can be reduced by laminating the core material.

The relationship between iron losses and supplied power is complex because iron losses are not entirely proportional to the load or supplied power. For instance, in a transformer operating at a constant frequency:

– Iron losses remain nearly constant regardless of the load because they are mainly determined by the core material’s properties and the applied