Abstract

High bandwidth and accuracy of the current control loop are fundamental requisites for reducing torque ripples in high performance drives, especially at high speeds or when a fast torque response is required. One of the candidates for these purposes is a dead beat current control (DBCC). Many types of DBCC have been proposed and implemented. This paper discusses the performances of DBCC considering time delays due to a digital control, and compares with a classical dq PI current regulator to explain the DBCC's advantages. Also a novel compensation method for the rotor movement is proposed to eliminate offsets error which come up at high speeds.

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