Add currents with same frequency but different phase?

AI Thread Summary
When combining currents with the same frequency but different phases, such as I1 = 1<10 and I2 = 2<20, the total current can be calculated by adding them as complex numbers. This method effectively incorporates both amplitude and phase information, making it a standard practice in electrical systems. The resultant complex number will provide the combined amplitude and phase of the currents. If the frequencies differ, the calculation becomes more complex, requiring additional methods like vector triangles. Overall, using complex numbers simplifies the addition of AC signals with the same frequency.
yosimba2000
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So assuming I1 = 1<10 and I2 = 2<20

And assume these current sources are in parallel, pointing in same direction.

Can I say total current is I1 + I2 = 1<10 + 2<20 ?

I would convert the phasor to complex number to combine them, but will this work?
 
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yosimba2000 said:
Can I say total current is I1 + I2 = 1<10 + 2<20 ?

I would convert the phasor to complex number to combine them, but will this work?
Of course it will work.
That's why use of complex numbers is widespread in electric systems.
 
As Hesch mentioned, that is why complex numbers are used to represent AC signals. When the frequency is the same for two signals you can write the signals as complex numbers, which contain the amplitude and phase information, and then add them together like you would any two complex numbers. the resultant complex number contains the resultant amplitude and phase information.

When the frequencies are different then you have a more complicated problem. :)
 
Hesch said:
Of course it will work.
. . . or you can draw the vector triangle and get the same answer.
 
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