Overview
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Recently, the growing demand for energy conservation and highly efficient
transformers is raising the importance of reducing the amount of loss.
Iron loss, which is one of the major losses for transformers, consumes
electric power as heat inside magnetic materials, causing the efficiency
of the transformer to decrease, and the temperature to rise. Evaluating
the ratio and distribution of the iron losses through simulation becomes
advantageous when designing a transformer.
This note presents the use of a magnetic field analysis to obtain the iron
losses of a transformer. |
Magnetic Flux Density Distribution/ Iron Loss Density Distribution
| The magnetic flux density distribution and iron loss density distribution
of the core are indicated in Fig. 1 and Fig. 2. The magnetic flux density
distribution and iron loss density distribution are the same, as indicated
in the figures. The amount of iron losses is proportional to the amount
of variation in the magnetic flux density distribution because the frequency
of the variations in the magnet flux density distribution is constant. |
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Joule Loss Density Distribution/ Hysteresis Loss density Distribution
| The Joule loss density distribution and hysteresis loss density distribution
of the core are indicated in Fig. 3, the ratio of losses is indicated in
Fig. 4, and the losses are indicated in Table 1. The Joule losses contribute
largely to the iron loss in the core as indicated in the figure. The amount
of core loss may be effectively decreased by reducing the amount of Joule
losses. |
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