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A 2kW, High Power-Density (100W/in3), GaN-Based, Modular Multilevel Converter for Variable Speed Drive Applications in DC Systems

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Achieving higher power-density for shipboard power conversion systems is extremely important for reduction of space requirements for electrical systems. This paper presents a single-phase, high power density inverter (450VDC, 2kW, 25in3) for variable frequency drive applications. High-power density is achieved through the application of the modular multilevel converter (M2C) topology in a low voltage inverter system, which is enabled through the use of millimeter scale, GaN HEMT devices.

This work presents the fundamental design, Simulink/PLECS and finite element simulations, and initial hardware development for the high-density inverter system. The design and manufacturing challenges associated with this high-density inverter design, including motor control, low frequency voltage oscillation are discussed. The design is modular with the capability of achieving higher power ratings for varying naval ship applications.
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Document Type: Research Article

Publication date: March 1, 2019

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  • The Naval Engineers Journal is the peer-reviewed journal of the American Society of Naval Engineers (ASNE). ASNE is the leading professional engineering society for engineers, scientists and allied professionals who conceive, design, develop, test, construct, outfit, operate and maintain complex naval and maritime ships, submarines and aircraft and their associated systems and subsystems.
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