How efficient is a HFT transformer compared to a transformer without air gaps?

The experimental results showed that the proposed HFT achieved a balanced flux density and magnetizing inductance with a high power density and low cost. Moreover, the transformer performed at a maximum efficiency of 98.67%, with a decrease of 3.33 °C in the overall temperature of the transformer as compared to the transformer without air gaps.

What is the temperature distribution of a 3p-hft transformer?

Figure 22 shows that the highest recorded temperature of the 3P-HFT was approximately 64.6 °C at a steady state point. The temperature distribution among the core limbs of the transformer was seen to be even because of the distribution of inside the transformer limb, which resulted in similar core losses within the core limbs.

What is the efficiency of a transformer?

Moreover, the transformer performed at a maximum efficiency of 98.67%, with a decrease of 3.33 °C in the overall temperature of the transformer as compared to the transformer without air gaps. 1. Introduction

What is a battery energy storage system?

Battery energy storage systems based on bidirectional isolated DC-DC converters (BIDCs) have been employed to level the output power of intermittent renewable energy generators and to supply power to electric vehicles. Moreover, BIDCs use high-frequency transformers (HFTs) to achieve voltage matching and galvanic isolation.

Why do 3P resonant transformers have a high flux density?

However, the three limbs still suffered from a high flux density that rendered it unsuitable for a core material such as ferrite. Similar to this, a three-phase LLC resonant converter in used a 1P-EC core shape intended for a 3P transformer. Here, the outer core legs had a higher flux density because of the small cross-sectional area.

How to design inter-bridge isolating IMFT?

The design methodology of inter-bridge isolating iMFT design is discussed in Appendix B, and the leakage inductance design has to be done by taking the converter’s nominal power transfer into consideration. The LVDC side filter comprises of only a compact film capacitor, which should be designed to filter out the switching frequency harmonics.