Grainger CEME Seminars

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Switched Brushless Doubly-Fed Reluctance Machines for Wide-Speed Range Applications

Event Type
Grainger CEME
4070 ECEB
Apr 9, 2018   1:00 - 1:50 pm  




Turboelectric propulsion systems are considered as a critical enabler to reach low-carbon emission in the aircraft industry. Unlike hybrid-electric and all-electric systems, these systems do not use batteries for propulsive energy during any phase of flight. Since batteries with high power capacity and specific power required for commercial aircraft are unlikely to be developed within the next decade, turboelectric systems constitute the only feasible and practical option at this point of time. Several motors are available for driving the distributed propeller fans and, among these, brushless, doubly-fed reluctance machines (BDFRM) are seen as appropriate, primarily because of their use of partially rated power converters, brushless operations and low rotor losses. A conventional BDFRM drive architecture is capable to operate within a limited speed range similar to wind turbines, with the specified partially rated power electronics interface. This presentation discusses the switched drive architecture with a reconfigured stator excitation on-the-fly to allow a wide-speed range operation required for applications such as aircraft propulsion systems, with benefits of fractionally rated power electronics kept fully intact.

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