Enter the core power loss (watts), the dc resistance power loss (watts), and the ac resistance power loss (watts) into the calculator to determine the Inductor Power Loss. 

Inductor Power Loss Formula

The following formula is used to calculate the Inductor Power Loss.

PiL = Pcore + Pdcr + Pacr
  • Where PiL is the Inductor Power Loss (watts)
  • Pcore is the core power loss (watts) 
  • Pdcr is the dc resistance power loss (watts) 
  • Pacr is the ac resistance power loss (watts) 

To calculate the inductor power loss, sum the core power loss, dc power loss, and ac power loss.

How to Calculate Inductor Power Loss?

The following example problems outline how to calculate Inductor Power Loss.

Example Problem #1

  1. First, determine the core power loss (watts). In this example, the core power loss (watts) is determined to be 10 .
  2. Next, determine the dc resistance power loss (watts). For this problem, the dc resistance power loss (watts) is measured to be 98 .
  3. Next, determine the ac resistance power loss (watts). In this case, the ac resistance power loss (watts) is found to be 745.
  4. Finally, calculate the Inductor Power Loss using the formula above: 

PiL = Pcore + Pdcr + Pacr

Inserting the values from above and solving yields: 

PiL = 10 +98+745 = 853 (watts)

FAQ

What factors contribute to inductor power loss?

Inductor power loss primarily consists of core power loss, DC resistance power loss, and AC resistance power loss. Core power loss is related to the magnetic properties of the inductor’s core material, DC resistance power loss is due to the resistance of the wire coil, and AC resistance power loss, also known as skin effect loss, increases with frequency due to the distribution of current being concentrated near the surface of the conductor.

How can inductor power loss be minimized?

To minimize inductor power loss, one can use materials with lower core losses for the inductor’s core, design the inductor to have a lower DC resistance by using thicker wire or better conducting materials, and reduce AC resistance power loss by using litz wire or designing the inductor to operate at a lower frequency where the skin effect is less pronounced.

Why is it important to calculate inductor power loss in electrical circuits?

Calculating inductor power loss is crucial for several reasons. It helps in assessing the efficiency of the inductor and the overall circuit. High power loss can lead to excessive heat generation, which might damage the inductor or surrounding components. Understanding power loss is also essential for thermal management and ensuring the reliability and longevity of electronic devices.