Instantaneous Average Prediction of the Currents in a PWM-Controlled Two-Level Converter

Research output: Contribution to journalResearch articleContributedpeer-review



In this paper, a new method is applied to predict the average value of the phase currents of a two-level voltage source converter. The method uses a suitable model of the converter, the modulation method, and the measurement. The samples given by the analog-to-digital converter (ADC) are used to predict the time progress of the currents in every switching cycle and then calculate its average. This allows removal of the delay introduced by filtering and avoids aliasing in the measurements. The average prediction is contrasted with the pulsewidth modulation (PWM) synchronous sampling method and the sigma-delta ADC with a moving average filter. Applied to a load observer, the method effectively reduces its estimation error. The findings are verified experimentally.


Original languageEnglish
Article number8345696
Pages (from-to)397-406
Number of pages10
JournalIEEE transactions on industrial electronics
Issue number1
Publication statusPublished - Jan 2019



  • AC-DC power converters, measurement techniques, prediction models, pulsewidth modulation (PWM), sigma-delta converter, state average, state-space methods