Current measurements in digitally controlled AC drives

Seung Ho Song; Jong Woo Choi; Seung Ki Sul

doi:10.1109/2943.847916

Current measurements in digitally controlled AC drives

Seung Ho Song, Jong Woo Choi, Seung Ki Sul

Department of Electrical Engineering

Seoul National University

Research output: Contribution to journal › Article › peer-review

90 Scopus citations

Abstract

The current sampling error has been investigated in the field oriented control of an ac machine by a pulse width modulation (PWM) inverter. The expression of the harmonic current due to a low pass filter has been derived analytically form the reference voltage vector in the space vector PWM (SVPWM) strategy. The fundamental components of the current sampling error causes improper torque regulation while the high frequency ripple of the error introduces lower permissible gain of the current regulators with a resultant impairment in dynamic behavior and limited stability range of the control systems. The effectiveness of the delayed sampling was verified through simulations and experimental results including steady state and dynamic response.

Original language	English
Pages (from-to)	51-62
Number of pages	12
Journal	IEEE Industry Applications Magazine
Volume	6
Issue number	4
DOIs	https://doi.org/10.1109/2943.847916
State	Published - Jul 2000

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Current measurements in digitally controlled AC drives

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