This letter presents a novel implementation of pulse width modulation that improves the quality of the line-to-line output voltages in interleaved multiphase voltage-source inverters (VSIs). In multiphase VSIs with n interleaved parallel-connected legs, the best single-phase output voltage is achieved when the carriers are evenly phase shifted. However, switching among nonadjacent levels can be observed at regular intervals in the line-to-line voltages, causing bad harmonic performance. With the proposed method, switching in the line-to-line voltages happens exclusively between adjacent levels. The modulator utilizes two sets of n evenly phase-shifted carriers that are dynamically allocated. Because of its generality, the proposed implementation is valid for any number of phases and any number of legs in parallel. A MATLAB/Simulink model has been set up for simulation purposes. Selected experimental results obtained from a three-phase VSI made up with two and three legs in parallel per phase are reported, confirming the enhancement attained with the proposed implementation. ; Peer Reviewed ; Postprint (published version)
Enhanced phase-shifted PWM carrier disposition for interleaved voltage-source inverters
2014-03-01
Article (Journal)
Electronic Resource
English
Àrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència , Power electronics , Electric inductors , Modulation (Electronics) , Interleaving , legs connected in parallel , pulse width modulation , voltage-source inverter (VSI) , Electrònica de potència , Inductors elèctrics , Modulació (Electrònica)
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