“ PWM PWM Inverter Inverter Princip le No 2” The output transistors work like switches RED Indi cates RED Closed Switch
(+) S1
S3
S4
S6
S5
DC Bus S2
T1 T2 T3
(-) S1 – on S1 – S6 – on S6 – S5 – on S5 – 0
60
S3 – on S3 – S2 – on S2 – 120
180
The output transistors of the inverter work like switches. They turn on and off in a specific pattern to produce produce an output voltage voltage waveform. What we will do is move through through the next few screen and watch the the switch closures as we progress through time. Click on the mouse button and watch the switches close ( the closed switches will turn red ).