Wound Field and Less Rare-Earth Electrical Machines in Renewables

Dear Colleagues,

Efforts to transition from conventional energy resources to renewable energy are at an all-time high, being driven by global efforts towards decarbonization and clean energy as summarized in SDGs 13 and 7, respectively. Electrical machines are at the forefront of this technological revolution regarding the roles they play as key components in power generation, transportation, grid stability, aerospace and industrial automation, among others. The critical design consideration for electrical machine designers and producers is to improve performance while reducing cost. Moreover, high-energy permanent magnet (PM) machines, which are known for their premium performance, are constrained by the limited geographic resource market and adverse mining environmental impacts of rare-earth PM metals, resulting in increased material costs. On the other hand, wound field or less rare-earth PM machines have emerged as low-cost alternatives, but with performance tradeoffs.

The Special Issue aims to explore the broad value chain of wound field or less rare-earth electrical machines as enabling technologies for renewable energy transition or integration in areas such as wind power generation, road and rail transport, off-road traction, aerospace, wave energy, ship propulsion, grid stability, gravity energy storage, hydrogeneration, tidal, wave, geothermal, biomass and biogas, pumped hydro, flywheel, industrial automation and synchronous condenser, among others. The scope of the Special Issue will cover areas on multi-physics analysis, the design of novel topologies, control, evaluation, optimization, life cycle cost (LCC) and levelized cost of energy (LCOE) assessments, as well as the prototyping and experimental validation of applying the proposed electrical machines in the renewable energy landscape.

Dr. Udochukwu B. Akuru
Prof. Dr. Zhongze Wu
Guest Editors

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• machine topology
• design and analysis
• modeling
• optimization
• multi-physics
• control
• electrical-excited
• wound field
• wound rotor
• brushless
• field-excited
• hybrid-excited
• less rare earth
• rare earth-free
• fault tolerance
• electric vehicle
• wind power generation
• multiphase
• synchronous condenser
• hygrogenerators
• DC-excited
• renewable energy