Title :
Combined synchronised PWM for symmetrical split-phase drives with low switching frequency
Author :
Griva, Giovanni ; Oleschuk, Valentin ; Profumo, Francesco ; Tenconi, Alberto
Author_Institution :
Dept. of Electr. Eng., Politec. di Torino, Turin
Abstract :
A new method of synchronised pulsewidth modulation (PWM) has been applied for control of six-phase (dual three-phase) converter feeding symmetrical induction motor which has two sets of windings spatially shifted by 60 electrical degrees. Basic schemes of synchronised continuous and discontinuous PWM, disseminated for control of symmetrical systems, have been analyzed and compared. It has been shown, that combined (hybrid) schemes of synchronized PWM provide better weighted THD factor of the useful components of the phase voltages in comparison with the identical (continuous+continuous or discontinuous+discontinuous) schemes of PWM in symmetrical dual three-phase systems. Simulation results illustrate the behavior of symmetrical six-phase converters with low switching frequency, controlled by algorithms of synchronised PWM.
Keywords :
PWM power convertors; harmonic distortion; induction motor drives; machine control; switching convertors; combined synchronised PWM; continuous continuous schemes; discontinuous discontinuous schemes; dual three-phase converter; low switching frequency; six-phase converter; symmetrical induction motor; symmetrical split-phase drives; symmetrical systems control; synchronised pulsewidth modulation; weighted THD factor; Control systems; Frequency synchronization; Induction motors; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Space vector pulse width modulation; Switching converters; Switching frequency; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 2008. PESC 2008. IEEE
Conference_Location :
Rhodes
Print_ISBN :
978-1-4244-1667-7
Electronic_ISBN :
0275-9306
DOI :
10.1109/PESC.2008.4592153
