Multiphase Interleaved IPT Based Current-Source Converter for High-Current Application

• Published in: IEEE journal of emerging and selected topics in industrial electronics (Print) Vol. 3; no. 3; p. 1
• Main Authors: Wang, Yao, Zhao, Shuyan, Kheirollahi, Reza, Mostafa, Amr a, Zhang, Hua, Lu, Fei
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-07-2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Capacitors; Circuit breakers; Circuit faults; Circuits; Converters; Current converters (AC to DC); Current sources; Electric potential; Harmonic analysis; High current; high-current application; Inductance; Inductive power transfer (IPT); Magnetic resonance; Magnetic saturation; Multiphase; multiphase interleaved; Power harmonic filters; Power transfer; Ripples; Saturation magnetization; solid-state circuit breaker; Steady state; Voltage; Zero voltage switching
• ISSN: 2687-9735; 2687-9743
• DOI: 10.1109/JESTIE.2022.3165990

This paper proposes a multiphase interleaved inductive power transfer (IPT) based dc-dc converter for high-current applications. There are three main contributions. First, the proposed converter is designed based on a loosely coupled IPT system with series compensation capacitors, which permits large leakage inductance and avoid magnetic saturation. Second, series capacitors are used to compensate the magnetic coupler, which achieves load-independent output current, namely a current-source converter. Third, a scalable multiphase converter is achieved with an input-parallel output-parallel structure for high-current. Meantime, an interleaved control strategy is implemented to an N-phase system with an angle shift of 360/(2N), reducing output current ripples. A 2kW/100A 3-phase converter prototype is implemented with zero-voltage-switching (ZVS) and harmonic loss suppression. Experimental results show a load-independent output current, which is linearly regulated by input dc voltage. With an input voltage of 480V, the output current reaches 101.5A with a small peak-peak ripple of 2.4A. Output power reaches 2.07kW with a 91.39% dc-dc efficiency. A steady-state test for a solid-state circuit breaker (SSCB) is conducted using the proposed high-current converter, showing its application in evaluating steady-state efficiency and thermal performance of SSCB.