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A new Brushless Real Time Control (RTC) method for electric motors or generators is an evolution in Sensor-less control. Very different from any derivative of Field Oriented Control (FOC), RTC uniquely eliminates all control uncertainty, including the extraneous shaft connected resolver for the specific purpose of measuring speed-position (i.e., Sensor-less). Although modified versions of RTC can be used for control of any type of electric machine, the variable speed Brushless Wound-rotor [Synchronous] Doubly-fed Electric Machine System (BWRSDF) with its symmetrical circuit topology best explains the attractive attributes of RTC but more importantly, the BWRSDF has been theorized by experts to provide the highest efficiency, highest power density, highest torque density, and lowest cost of any electric machine with practical solutions for known issues of instability and a multiphase slip-ring assembly that only RTC successfully provides. In addition, BWRSDF uses off-the-shelf technology and readily available materials without precious rare earth permanent magnets.