Inverters - M.W.Nasim M.W.Naeem

Applications of Inverters  Variable speed a.c. motor drives.  Induction heating.  Aircraft power supplies.  Uninterruptible power supplies (UPS).  High voltage d.c. transmission lines.  Battery-vehicle drives.  Regulated voltage and frequency power supplies, etc. M.W.Naeem

Classification of Inverter  Based on the nature of Input  Voltage source inverters (VSI)  Current source inverters (CSI) M.W.Naeem

Classification of Inverters  Depending on the waveform of the output  Square-wave inverter  Quasi-square wave inverter  Pulse-width modulated (PWM) inverters M.W.Naeem

Classification According to the Method of Commutation  According to the method of commutation,  Line commutated inverters  Forced commutated inverters. M.W.Naeem

Classifications According to Connections  According to the connections of the thyristors and commutating components, the inverters can be classified mainly in three groups. These are:  Series inverters.  Parallel inverters.  Bridge inverters.: Bridge inverters are further classifed as: (i) Half-bridge and (ii) Full-Bridge. M.W.Naeem

Basic Series Inverter M.W.Naeem

Improved Series Inverter M.W.Naeem

Parallel Inverter M.W.Naeem

Single phase full bridge inverter M.W.Naeem

Single phase half bridge inverter M.W.Naeem

Single phase Full bridge inverter M.W.Naeem

Three Phase Inverter M.W.Naeem

Operation Table Sr.NoIntervalDevice Conducting Incoming Device Outgoing Device 1I5,6,114 2II6,1,225 3III1,2,336 4IV2,3,441 6V3,4,552 7VI4,5,663 M.W.Naeem

Devices Conducting : 5,6,1 M.W.Naeem

Devices Conducting : 6,1,2 M.W.Naeem

Devices Conducting : 1,2,3 M.W.Naeem

Operation Table Sr.N o Inte rval Device Condu cting Inco ming Devi ce Outg oing Devi ce EanEbnEcn 1I5,6,114 2Edc/ 3 2II6,1,225 3III1,2,336 4IV2,3,441 6V3,4,552 7VI4,5,663 M.W.Naeem

I G1 I G2 I G3 I G4 I G5 I G6 I II III IV V VI M.W.Naeem

E BN I II III IV V VI E AN E CN M.W.Naeem

E BC I II III IV V VI E AB E CA M.W.Naeem