Review on Oversampling Approaches for Control and Estimation in Electrical Drives

To guarantee higher bandwidths and faster diagnostics in electrical drives systems, oversampling-based routines have been receiving increasing attention, particularly for the purpose to improve the limitations of motor control approaches and increase the overall reliability of the drive. This paper reviews recent research findings of oversampling approaches applied to parameter estimation, sensorless control, fast current control, and diagnostics. As the computational capacity of modern electrical drives is increasing when traditional solutions are being replaced by field programmable gate array (FPGA) hardware-based digital control systems, it is important to highlight the opportunities toward next generation motor drive systems provided with intelligent oversampling routines. The possibilities that oversampling could provide for closed-loop control diagnostics or component fault detection have not yet been exploited to the full, but there is a need for robust and fast approaches. This paper provides concise review of the oversampling approaches and their possible solutions in future drives.