Inverse of a sum property
... Inverse of a sum property For any rational numbers a and b, -(a + b) = -a + -b (The additive inverse of a sum is the sum of the additive inverses) The inverse of a sum property holds for differences as well as sums because any difference can be expressed as a sum. When we apply the inverse of a sum ...
... Inverse of a sum property For any rational numbers a and b, -(a + b) = -a + -b (The additive inverse of a sum is the sum of the additive inverses) The inverse of a sum property holds for differences as well as sums because any difference can be expressed as a sum. When we apply the inverse of a sum ...
Aalborg Universitet Single-Phase Shunt Active Power Filters Under Adverse Grid Conditions
... balanced set of in-quadrature outputs with correct amplitudes, the center frequency of the SOGI structure must be equal to the input signal frequency. To achieve this goal, the center frequency is adjusted by an estimation of the grid voltage frequency. The estimated frequency is obtained by using a ...
... balanced set of in-quadrature outputs with correct amplitudes, the center frequency of the SOGI structure must be equal to the input signal frequency. To achieve this goal, the center frequency is adjusted by an estimation of the grid voltage frequency. The estimated frequency is obtained by using a ...
Mathematics of radio engineering
The mathematics of radio engineering is the mathematical description by complex analysis of the electromagnetic theory applied to radio. Waves have been studied since ancient times and many different techniques have developed of which the most useful idea is the superposition principle which apply to radio waves. The Huygen's principle, which says that each wavefront creates an infinite number of new wavefronts that can be added, is the base for this analysis.