Inverters are power electronics circuits that convert DC to AC power with a constant magnitude and frequency. They can operate in two ways - with a constant DC input and varying gain, or a varying DC input and constant gain. Inverters use devices like BJTs, MOSFETs, IGBTs, and SCRs. They can be classified based on their connections as series, parallel, or bridge inverters, and based on their output as single or three phase inverters, with the main types being VSI and CSI inverters.

1. Prepared ByPrepared By
Mr.P.KarthikeyanMr.P.Karthikeyan
AP/EEE/KECAP/EEE/KEC
Working Operation
Of
Inverter

2. INVERTER
• One type of Power Electronics Circuits
• Convert DC to AC with constant magnitude
and frequency
• Two way, we can get AC output from inverter
1. DC input is constant and Gain of inverter is
varying
2. DC input is vary and Gain of inverter maintain
constant

3. • Ideal inverter output is sinusoidal
• Practical inverter output is non sinusoidal
• For low and medium power application output wave
is square or quasi square wave
• Inverter devices may be, BJT,MOSFET,IGBT,SCR
Classification of inverter
Based on Connection:
1. Series inverter
2. Parallel inverter
3. Bridge inverter

4. Based on output:
1. Single phase inverter
2. Three phase inverter
Main Types are
1. VSI
2. CSI

5. Vs

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