- #1

- 9

- 0

## Main Question or Discussion Point

Say I have a circuit like this: (R+L+R||L)

-----20ohm---150mH------------

|................................|..........|

Vs.............................80mH 120ohm

|................................|..........|

---------------------------------

Vs = 120V @ 60Hz

So I decide I want to add a capacitor across the source of 28.35uF to correct the power factor to 1. Then, because I'm bored, I want to recalculate the current through the circuit to prove to myself that the current hasn't changed, only the phase angle.

Therefore I do something like -XCj || ((R+XL1) + R||XL2)

And end up with an answer of about 292 + 0j ohms.

This gives me a current much smaller than before I added the capacitor, meaning my real power has changed which isn't supposed to happen. Can someone shed some light on this problem?

-----20ohm---150mH------------

|................................|..........|

Vs.............................80mH 120ohm

|................................|..........|

---------------------------------

Vs = 120V @ 60Hz

So I decide I want to add a capacitor across the source of 28.35uF to correct the power factor to 1. Then, because I'm bored, I want to recalculate the current through the circuit to prove to myself that the current hasn't changed, only the phase angle.

Therefore I do something like -XCj || ((R+XL1) + R||XL2)

And end up with an answer of about 292 + 0j ohms.

This gives me a current much smaller than before I added the capacitor, meaning my real power has changed which isn't supposed to happen. Can someone shed some light on this problem?