Results 251 to 260 of about 2,950,870 (336)

High-Frequency Losses Calculating Model for Magnetostrictive Materials Considering Variable DC Bias

IEEE transactions on magnetics, 2022
According to the actual operation conditions, a kind of high-frequency losses testing system of magnetostrictive materials under dc bias is built. The dynamic hysteresis loops for Terfenol-D samples at different ac driving frequencies and magnetic ...
Pingping Guo, Wenmei Huang, Wanli Guo, L. Weng   +3 more
semanticscholar   +1 more source

Transient DC Bias and Universal Dynamic Modulation of Multiactive Bridge Converters

IEEE transactions on power electronics, 2022
Multiactive bridge (MAB) converters are attracting increasing attention due to their advantages of mutual electrical isolation and bidirectional power flow capability among different ports.
Shusheng Wei, Di Mou, Wusong Wen, Zhengming Zhao, Kai Li   +4 more
semanticscholar   +1 more source

Research on Anti-DC Bias and High-Order Harmonics of a Fifth-Order Flux Observer for IPMSM Sensorless Drive

IEEE transactions on industrial electronics (1982. Print), 2021
Due to various nonideal factors, including the motor parameter mismatches, detection errors, converter nonlinearities, noise, etc., dc bias and high-order harmonics exist in the flux model, which make the traditional flux observer estimation inaccurate ...
Yanping Zhang, Zhonggang Yin, F. Gao, Jing Liu   +3 more
semanticscholar   +1 more source

Universal Modulation Scheme to Suppress Transient DC Bias Current in Dual Active Bridge Converters

IEEE transactions on power electronics, 2021
This article presents a modulation scheme to suppress the transient dc bias current in dual active bridge (DAB) converters. The current in the transformer at the commutating time is associated with the initial current in a switching period, so there must
Shujun Mu, Zhiqiang Guo, Yong Luo
semanticscholar   +1 more source

Core Loss Model for Arbitrary Excitations With DC Bias Covering a Wide Frequency Range

IEEE transactions on magnetics, 2021
Core loss prediction is quite complex as the excitation of magnetic materials varies depending on the topology and the operating mode of switched-mode power supplies.
E. Stenglein, T. Dürbaum
semanticscholar   +1 more source

Universal Transient DC-Bias Current Suppression Strategy in Dual-Active-Bridge Converters for Energy Storage Systems

IEEE Transactions on Transportation Electrification, 2021
The dc-bias current may result in the magnetic flux saturation and endanger the safe operation of switching devices. By regulating the inductor current slope during the transient, this article proposes a novel transient phase shift control (TPSC) to ...
Qinglei Bu, H. Wen, Haochen Shi, Yihua Hu, Yong Yang   +4 more
semanticscholar   +1 more source

Design Optimization of Medium-Frequency Transformer for DAB Converters With DC Bias Capacity

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2021
Medium-frequency transformer (MFT) dc bias is critical for the safe operation of dual-active-bridge (DAB) converters. To analyze the dc bias, expressions of dc bias are derived for SiC MOSFET DAB converters.
Pengfei Yao, Xiaohua Jiang, Peng Xue, Siqi Li, Sizhao Lu, Fred Wang   +5 more
semanticscholar   +1 more source

DC Bias Study for DC-DC Dual-Active-Bridge Converter

2018 IEEE 4th Southern Power Electronics Conference (SPEC), 2018
For the dual-active-bridge (DAB) converter, the adoption of high-frequency transformer provides galvanic isolation, but also brings the possibility of dc bias. In this paper, the calculation methods for dc bias are derived in details. Hence, the dc bias magnetizing current can be predicted considering the inconsistency of semiconductor switches and ...
Liangcai Shu, Wu Chen, Zhiguang Lin, Dajun Ma, XiaoKun He, Waqar Azeem Syed   +5 more
openaire   +1 more source

Vibration characteristic analysis of transformers influenced by DC bias based on vibration half-wave energy method

, 2021
More and more DC bias problems caused by monopole operation of HVDC are appeared in grid which leads to efficiency droop or potential risk of transformers.
Xingmou Liu, Chenyu Sun, Yan Wang, Fan Jiang, Chenyang Zhang   +4 more
semanticscholar   +1 more source

Transient DC Bias Elimination of Dual-Active-Bridge DC–DC Converter With Improved Triple-Phase-Shift Control

IEEE transactions on industrial electronics (1982. Print), 2020
A transient dc-bias current due to the voltage-second imbalance of isolated bidirectional dual-active-bridge (DAB) converters for the disturbance in line or load may result in the transformer saturation and oscillations in both sides dc currents.
Qinglei Bu, H. Wen, Jia-cheng Wen, Yihua Hu, Yang Du   +4 more
semanticscholar   +1 more source