VP17-04 Structure Design and Magnetic-Vibration Characteristics Analysis of Hybrid Core for High Efficiency Distribution Transformer
Creators: Yongjian Li
Guangyu Han
Shuaichao Yue
Zhenyu Wan
Jiatong Yin
Publisher: name: IEEE
Year: 2025

Amorphous alloy and oriented silicon steel are two commonly used materials for making distribution transformer cores, each of which has its own advantages[1].The hybrid core structure formed by the two materials can synthesize their respecive advantages. The proper allocation of amorphous alloy and oriented silicon steel is crucial for reducing core loss and minimizing vibration in distribution transformer cores[2]. Therefore, it is necessary to investigate the structural design methodologies and magnetic properties of hybrid cores. This paper proposes a hybrid core design method based on magnetomotive force for the double-layer hybrid wound core structure of amorphous alloy wound core and oriented silicon steel wound core. Firstly, an experimental setup for core loss and vibration measurement is built. This setup can provide real-time voltage waveforms adjustment, data visualization and automatic post-processing, which makes the measurement more rapid and accurate. Then, based on the structural characteristics of the hybrid core, an equivalent magnetic circuit model is established. By comparing the magnitude of the magnetomotive force of the two parts of the hybrid core, the magnetic flux density for each part of the hybrid core can be obtained. A hybrid core is made according to the designed size, and then two cores of the same size are made, one made entirely of amorphous alloy and the other entirely made of oriented silicon steel. The loss characteristic and vibration acceleration of the three cores under power frequency sinusoidal voltage excitation are measured.References: [1] L. Gang etal, IEEE Transactions on Magnetics, vol. 56, p. 1-4, (2020) [2] H. Chen etal, Journal of Magnetism and Magnetic Materials, vol. 590, p. 171689, (2024)
Amorphous alloy and oriented silicon steel are two commonly used materials for making distribution transformer cores, each of which has its own advantages[1].The hybrid core structure formed by the two materials can synthesize their respecive advantages. The proper allocation of amorphous alloy and oriented silicon steel is crucial for reducing core loss and minimizing vibration in distribution transformer cores[2]. Therefore, it is necessary to investigate the structural design methodologies and magnetic properties of hybrid cores. This paper proposes a hybrid core design method based on magnetomotive force for the double-layer hybrid wound core structure of amorphous alloy wound core and oriented silicon steel wound core. Firstly, an experimental setup for core loss and vibration measurement is built. This setup can provide real-time voltage waveforms adjustment, data visualization and automatic post-processing, which makes the measurement more rapid and accurate. Then, based on the structural characteristics of the hybrid core, an equivalent magnetic circuit model is established. By comparing the magnitude of the magnetomotive force of the two parts of the hybrid core, the magnetic flux density for each part of the hybrid core can be obtained. A hybrid core is made according to the designed size, and then two cores of the same size are made, one made entirely of amorphous alloy and the other entirely made of oriented silicon steel. The loss characteristic and vibration acceleration of the three cores under power frequency sinusoidal voltage excitation are measured.References: [1] L. Gang etal, IEEE Transactions on Magnetics, vol. 56, p. 1-4, (2020) [2] H. Chen etal, Journal of Magnetism and Magnetic Materials, vol. 590, p. 171689, (2024)