THE BIFILAR COIL IS COMPOSED OF 2 TWO SEPARATE WINDINGS
NOT JUST ONE WOUND AROUND THE CORE THEN BACK AGAIN!!!!
I PROVIDED A PICTURE TO SHOW WHAT I MEAN
The current flow is conventional flow (+ TO -)
Hi, I know bifilar coils are supposed to decrease the inductance of a coil because the windings are wound in such a way as to cancel the each-others magnetic field. The question I came up with though is what happens when one of those windings is shut down (stop powering them and allow them to discharge through say a resistor?
The reason I ask this is because normally when a coil is shut down, it will take a certain amount of time to do so. So if say a 1H inductor takes 1 second to reach steady state at 1 volt, then as long as the circuit is kept the same (resistance) the discharge to steady state will be equal, takes 1 second to discharge with a voltage spike of 1 volt.
But when wound as a Bifilar coil, both windings counteract each other. So that same 1H inductor will now be a 10 uH inductor (I am actually not sure how much the inductance will decrease). Now when you apply power to the both coil A and B of the normally 1H inductor, it acts like a 10 uH inductor and each winding rises to steady state in 10 uS with an applied 1 Volt. So what happens when you discharge only say coil B and leave coil A on at steady state? Wouldn't Coil A now become a 1 H inductor since Coil B is no longer there to counteract coil A's magnetic field?
I know that Coil B will cause a voltage spike on A causing a decrease in the current on A but you could counter act that by powering coil A with a current source so it applies whatever voltage is necessary to keep the current on coil A at a specified level.
I guess what I am trying to get at is what effects does coil B shutting off have on coil A. Coil B's magnetic field will decrease while at the same time Coil A's magnetic field would rise to become the only magnetic field in the coil. orginaly they were say 10 uH becomes of the opposition of each-others magnetic field but now with coil B, Coil A now acts like a 1 H inductor?
NOT JUST ONE WOUND AROUND THE CORE THEN BACK AGAIN!!!!
I PROVIDED A PICTURE TO SHOW WHAT I MEAN
The current flow is conventional flow (+ TO -)
Hi, I know bifilar coils are supposed to decrease the inductance of a coil because the windings are wound in such a way as to cancel the each-others magnetic field. The question I came up with though is what happens when one of those windings is shut down (stop powering them and allow them to discharge through say a resistor?
The reason I ask this is because normally when a coil is shut down, it will take a certain amount of time to do so. So if say a 1H inductor takes 1 second to reach steady state at 1 volt, then as long as the circuit is kept the same (resistance) the discharge to steady state will be equal, takes 1 second to discharge with a voltage spike of 1 volt.
But when wound as a Bifilar coil, both windings counteract each other. So that same 1H inductor will now be a 10 uH inductor (I am actually not sure how much the inductance will decrease). Now when you apply power to the both coil A and B of the normally 1H inductor, it acts like a 10 uH inductor and each winding rises to steady state in 10 uS with an applied 1 Volt. So what happens when you discharge only say coil B and leave coil A on at steady state? Wouldn't Coil A now become a 1 H inductor since Coil B is no longer there to counteract coil A's magnetic field?
I know that Coil B will cause a voltage spike on A causing a decrease in the current on A but you could counter act that by powering coil A with a current source so it applies whatever voltage is necessary to keep the current on coil A at a specified level.
I guess what I am trying to get at is what effects does coil B shutting off have on coil A. Coil B's magnetic field will decrease while at the same time Coil A's magnetic field would rise to become the only magnetic field in the coil. orginaly they were say 10 uH becomes of the opposition of each-others magnetic field but now with coil B, Coil A now acts like a 1 H inductor?
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