CLEAN SIGNAL! Our inverters do not make radios or TV's buzz or blink!

 

 

Harmonic Currents and Voltages

Harmonics in power circuits are frequencies that are integer multiples of a fundamental frequency
generated by non-linear electrical and electronic equipment. The fundamental line frequency (50 or 60 Hz)
combines with the harmonic sine waves to form repetitive, non-sinusoidal distorted wave shapes. Total
harmonic distortion (THD) is a measure of the amount of distortion produced as current flows from the
power line. This line current can flow at the fundamental frequency (60 Hz in the U.S.) or it may be
combined with odd harmonic currents (multiples of the fundamental) such as 180 Hz (3rd harmonic), 300
Hz (5th harmonic), and 420 Hz (7th harmonic). The THD value is the effective value of all the harmonic
currents added together, compared with the value of the fundamental current. For example, 20% THD
means that the total harmonic current is equal to 20% of the total 60-Hz current. Contemporary electronic
loads have different current and voltage wave shapes. Our inverters operate at very high switching speeds

and are very energy-efficient, Our power inverters computer actually "analyzes" power needs

from the "load" and provides longer "wave pulses" lengthening the power form at the beginning of

the cycle, then turning on the pulse, and then turning off again at the end of the first half cycle very rapidly

like only a computer could do. This pattern appears first in the positive half cycle, then in the negative half

cycle, and repeats in the same manner as the original CURRENT sine wave not VOLTAGE.

 

Currents or Voltages First?

Which should be considered first, the voltage harmonics or the current harmonics? Facility managers and
suppliers of harmonic proliferating equipment who have been schooled to be concerned about voltage
distortion issues are difficult to convince about the need to create a longer current wave first then the voltage
distortion caused by the current. When the currents and the harmonic content contained in each spectrum
for each group of load devices are identified, the individual harmonics can be summed to find the total
current. The total current can be used to determine the effect this total will have on the transformer, the
common bus voltage, and any adjacent equipment. Determining voltage harmonics may prevent
identification of the device that is causing the problem. This approach can make it more difficult to fix the
problem. Knowledge of the current distortion, its effect upon the local equipment and the whole system,
and the possible interaction on the electric utility supply provides a way to know what needs to be fixed.

A computerized active wave form that analyzes the load and can make harmonic changes to the wave

form upon load demand while on-the-fly is a power supply revolution that is finally available here and now.