DC Machine Core Loss Calculator
Calculate DC machine core loss (iron loss) from hysteresis and eddy currents using flux density, frequency, and material constants.
electrical machine losses calculator
DC machine core loss calculator aids in evaluating iron losses due to hysteresis and eddy currents in the magnetic core, making the analysis of the efficiency of DC motors and generators much more accurate.
Formula & Table Summary:
- Hysteresis Loss: Wh = η × B^1×6 × f × V
- Eddy Loss: We = Ke × B^2 × f^2 × t^2 × V
- Total Core Loss: Wc = Wh + We
eddy current loss calculator
The DC Machine Core Loss Calculator is an estimate of the iron loss in the core of a DC machine (motor or generator). Iron loss or core loss is made up of two components: hysteresis loss and eddy current loss.
Hysteresis loss is incurred by the repetition of magnetization and demagnetization of the core material, whereas the eddy current loss is incurred by the currents that are circulated through the iron core. The two losses are all dependent on the use of flux density, frequency, material property, and volume of the core.
Losses in the core are fairly constant on a given machine at full voltage and full flux. It significantly influences the performance of DC motors and generators, and therefore, evaluation should be carefully done in the design of machines and their performance assessments
dc machine core loss calculator
| Bmax (T) | f (Hz) | V (m³) | Wh (W) | We (W) | Wc (W) |
|---|---|---|---|---|---|
| 1.2 | 50 | 0.01 | 96 | 40 | 136 |
| 1.4 | 50 | 0.01 | 140 | 56 | 196 |
| 1.6 | 60 | 0.02 | 220 | 110 | 330 |
| 1.8 | 60 | 0.02 | 310 | 160 | 470 |
Frequently Asked Questions - DC Machine Core Loss Calculator:
What is core loss in a DC machine?
Core loss is the iron loss caused by hysteresis and eddy currents in the magnetic core.
Which two components make up core loss?
Hysteresis loss and eddy current loss.
Does frequency affect DC machine core loss?
Yes, frequency of magnetic reversal affects both hysteresis and eddy current losses.
Is core loss constant in a DC machine?
Yes, it remains nearly constant for rated flux and voltage.
What reduces eddy current loss?
Using laminated cores with thin sheets reduces eddy currents.
What reduces hysteresis loss?
Using materials with low hysteresis constant like silicon steel.
Why is core loss important?
It affects machine efficiency and heating.
Is core loss present at no load?
Yes, it exists whenever flux is present in the core.
How is hysteresis loss calculated?
Wh = η·B^1.6·f·V using Steinmetz equation.
How is eddy current loss calculated?
We = Ke·B^2·f^2·t^2·V considering lamination thickness and flux.
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