Multilevel SPWM Inverter with Variable Carrier Synchronization
| Author(s) | : | Mr. Zala Jaydipsinh B, Prof. V. J. RUPAPARA |
| Institution | : | PG Student, Power Electronics, L.E.College, Morbi, Gujarat-India Gujarat Technological University |
| Published In | : | Vol. 1, Issue 3 — March 2014 |
| Page No. | : | 112-119 |
| Domain | : | Engineering |
| Type | : | Research Paper |
| ISSN (Online) | : | 2348-4470 |
| ISSN (Print) | : | 2348-6406 |
Multilevel inverter generates stepped AC signal. Based on sequence of switching and duration of eachstep we can minimize the output Voltage THD. Sinusoidal Pulse Width Modulation (SPWM) is a very popularcontrol method and widely used in power electronics inverter circuits to reduce lower level Harmonics. Weconnect several SPWM inverters in cascade and receive multilevel SPWM output.There are different SPWMmethods to receive multilevel SPWM output voltage. And there are: (a) In Phase Disposition PWM (PHDisposition) (b) Phase Opposition Disposition PWM (PO Disposition) (c) Alternative opposition DispositionPWM (APO Disposition) (d) 90Ëš Phase Shifted Disposition PWM (90Ëš PS Disposition). From all these methodsthere are creates an many triangular carrier waveforms which are phase shifted or level shifted from maintriangular carrier signal and they all compared with reference Sine Wave signal to generates switching pulsewhich gives Sinusoidal output voltage with different harmonics level.
Mr. Zala Jaydipsinh B, Prof. V. J. RUPAPARA, “Multilevel SPWM Inverter with Variable Carrier Synchronization”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 1, Issue 3, pp. 112-119, March 2014.
