Roboty nahradia v práci ľudí
V tom odkaze sa záujemca aj dozvie, prečo až 400Hz.
Why 400 Hz?
Universal emf equation says: E = 4.44*f*n*a*B
So for a given voltage and number of turns, increasing the frequency allows for
decreasing the cross-sectional area of the core without bringing the core into
saturation.
Pro: The advantage of running an electrical system at 400 Hz rather than 60
Hz is that the power supplies are smaller and lighter.
Con: This reduction in weight comes at a price, since high-frequency electrical
systems are less efficient, because transformer losses increase with
frequency (mostly due to increased hysteresis losses, eddy currents, skin
effect, etc.).
So, the 400Hz figure represents an optimal trade-off between efficiency and
compactness