0
\$\begingroup\$

I am an Electrical Engineering student, and when we were taught about inverters (at a power electronics course) we studied inverters using Sinusoidal Pulse Width Modulation.

My question is do the so-called "true sinewave" inverters use the same technology, or a different one?

Isn't it possible instead of using SPWM to directly create a sinusoidal waveform (stepped like a DDS signal generator does) and then use that waveform to drive some power semiconductors?

\$\endgroup\$
1
\$\begingroup\$

You could, but the SPWM technology, as you call it, allows the use of "class D" (digital switching) power technology, which is much more efficient than any sort of linear power amplifier would be.

\$\endgroup\$
  • \$\begingroup\$ Do the "pure sinewave" inverters use SPWM technique or something different? \$\endgroup\$ – user19955 Jul 12 '14 at 13:46

Not the answer you're looking for? Browse other questions tagged or ask your own question.