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Three-Phase Inverters. Consider three single-phase inverters in parallel, driven 120 ° apart. Three-Phase Inverter (continued). Three single-phase full bridge inverters. 12 transistors, 12 diodes, 3 transformers Could it be simpler?. Alternative (Preferred) Configuration.

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three phase inverters
Three-Phase Inverters

Consider three single-phase inverters in parallel, driven 120° apart.

three phase inverter continued
Three-Phase Inverter (continued)

Three single-phase full bridge inverters

12 transistors, 12 diodes, 3 transformers

Could it be simpler?

alternative preferred configuration
Alternative (Preferred) Configuration

6 transistors, 6 diodes conduction for 120° or 180°

180 conduction
180° Conduction
  • Three transistors ON at a time
mode 1 operation11
Mode 1 Operation

Q1, Q5, Q6 conduct

mode 2 operation14
Mode 2 Operation

Q1, Q2, Q6 conduct

mode 3 operation17
Mode 3 Operation

Q1, Q2, Q3 conduct

rms value of the nth component
rms value of the nth Component

Fundamental Component

dc supply current
DC Supply Current

IL=√3Io is the rms load line current

Vo1= fundamental rms output line voltage

Io is the rms load phase current

Θ1 = the load impedance angle at the fundamental frequency

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