AC%20CURRENT

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AC CURRENT
EAS 5407 Mechatronic Systems

• Arthur

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AC Line Waveform
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AC Line Feature
Amplitude 110 V Frequency 60 Hz Period 1/f
16.67 ms RMS of Voltage 110/sqrt(2) 77.79
V Typical RMS Current of Household 305 A
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AC v.s. DC

• More Efficient to Transmit
• More Easier to Drive Motor
• Can Be a 60Hz Signal

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More Efficient Transmit
All the power transmit lines have internal
resistance. This resistance is in serial with the
household electrical applicants. Because the
power wasted on the transmit lines is equal to
IIR. To reduce the wasted power, we must try to
reduce the current of the transmit lines. Because
the total power is constant, PUI. So we can
make the voltage very high to reduce the current
amplitude. But only AC can use transformer to
change voltage. Although DC can also change
voltage with the help of Inverter, but it is less
stable and robust.