Single-phase half-bridge inverter
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22-10-2010, 03:31 PM

.ppt   1291.ppt (Size: 178.5 KB / Downloads: 621)

Single-phase half-bridge inverter

Operational Details

Consists of 2 choppers, 3-wire DC source
Transistors switched on and off alternately
Need to isolate the gate signal for Q1 (upper device)
Each provides opposite polarity of Vs/2 across the load

DC Supply Current

If the inverter is lossless, average power absorbed by the load equals the average power supplied by the dc source.
For an inductive load, the current is approximately sinusoidal and the fundamental component of the output voltage supplies the power to the load. Also, the dc supply voltage remains essentially at Vs.

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