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Rene Spee, Shibashis Bhowmik, Johan H R Enslin: Performance optimization controller and control method for doubly-fed machines. The State of Oregon Acting by and Through the State Board of Higher Education on Behalf of Oregon State University, Klarquist Sparkman Campbell Leigh and Whinston, August 25, 1998: US05798631 (228 worldwide citation)

A variable speed, constant frequency (VSCF) system utilizes a doubly-fed machine (DFM) to maximize the output power of the system. The system includes a power converter that provides a frequency signal and a current signal to the DFM. The power converter is controlled by an adaptive controller. The ...


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Alan Wallace, Rene Spee: Brushless doubly-fed generation system for vehicles. The State of Oregon Acting by and through the State Board of Higher Education on Behalf of Oregon State University, Klarquist Sparkman Campbell Leigh & Whinston, January 21, 1992: US05083077 (33 worldwide citation)

An onboard power generation system for use on board a vehicle, such as a passenger car, includes a brushless doubly-fed generator. The generator has a rotor with rotor conductors and a stator with stator windings, the stator windings comprising first and second polyphase stator systems. The generato ...