2012/09/01 by Frederick William Klatt · 1 citation
Engineering · #Electric Motor Design and Analysis #Sensorless Control of Electric Motors #Multilevel Inverters and Converters #Resolver #Torque #Torque density #Slip ring #Rotor (electric) #Position sensor #Electric machine #Automotive engineering #Electronic speed control #Control theory (sociology) #Magnet #Computer science #Machine control #Vector control #Electric motor #Slip (aerodynamics) #Position (finance) #Control engineering #Engineering #Electrical engineering #Control (management) #Voltage #Induction motor #Physics #Artificial intelligence #Aerospace engineering
paper · doi:10.1109/sled.2012.6422811
openalex publication_date 2012/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
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.