We place a THD analyzer on the front panel of the Power Plant Premier (PPP) to show the THD levels on the line. Their elimination is important to good performance and all the engineering that goes into the PPP is designed to eliminate harmonics. When you engage the MultiWave feature, a bit of third harmonics is added top the sine wave on the output. This added third harmonic increases the charging time for equipment and improves the performance. So if we went to all the trouble of building a THD analyzer on the front panel to show how the PPP eliminates harmonics, why add them back in with MultiWave?
The answer lies in a little understanding. The harmonics we work so hard to get rid of are not, in themselves, a problem. What causes the harmonics in the first place is. When the AC sine wave is topped sine wave meaning the peak of the AC sine wave has been cut off by too many users on the AC line (a common problem) this causes harmonics and we measure them and display it for you.
To fix this problem, we add the missing energy back into the AC and replace the flat top sine wave with a perfect form that is harmonic free. So it isn’t the harmonics generated that are bad, they are just an indication of the problem of flat topping. The real problem is the missing energy used to charge your equipment which the PPP handles by rebuilding new power.
Now, with MultiWave, we actually create more energy by extending the charging time of the peak of the sine wave once we replace the missing energy. We do this by adding in a bit of pure third harmonic but the key here is it’s full energy there’s nothing missing in the sine wave.
The flat topping we were concerned with is now replaced with the missing energy, and the charging time for the equipment has been extended.
The peak of the sine wave is where most of our equipment draws its power and when that voltage is missing, the average level going into our power amplifiers or connected equipment is lower, thus we have both higher ripple current (more noise) and lower overall volts.
So where does the energy we add back into the sine wave come from?
Because we are building new AC from DC, we store the needed energy in big power supply capacitors in the PPP. When we build the new sine wave, we draw the energy from those capacitors to feed the connected equipment what it wants. This can be rather extreme and in some cases as we need to deliver up to 50 amps! That’s a big challenge for any piece of equipment and it’s one of the reasons the PPP is tough to design and build.
Compare all that to a power conditioner â€“ which cannot store any energy at all â€“ and you quickly see the advantages of the PPP. Plus, we’re only talking about flat topping. Remember, one of the bigger problems with power amps is when they draw current to reproduce loud dynamics through your speakers, the whole AC line voltage can drop and often does.
Thus if you were to look at the AC line voltage feeding a power amplifier with a scope you’d actually see the music on the line in the form of a dynamic voltage drop. The fact that the PPP provides fully regulated voltage on an instantaneous (dynamic) basis is one of its main benefits â€“ and even a bigger one that correcting the flat topping.