This experiment is from my PDF document: Guidelines to Bucking Coils. P.14
Partnered Output Coils have a unique but well known effect to those in the know, of Reduced Impedance Effect.
A Coil of Insulated Conductive Wire has two components to its Resistance, both combined into the Coils Impedance (Z).
Impedance (Z) is made up from Inductive Reactance (XL) and Capacitive Reactance (XC). Reactance is the Resistance to change of the Magnetic Field. For example, the Coil will exhibit a Force, a Magnetic Field in opposition to its own changing Magnetic Field, if you like a Lenz's Law effect inside the Coil, to its own changing Magnetic Field.
The Coil's Impedance may be represented with Real and Imaginary Numbers.
An example may look like this: Impedance (Z): 0.957826285221151+j3.193 in Ohms Ω
- 0.957826285221151 is the DC Resistance in Ohms
- 3.193 is the Inductive Reactance also in Ohms
- +j is the Imaginary Number, indicating that Inductive Reactance is dominant, -j indicating Capacitive Reactance is dominant.
This example is from a series of equations examining a Coil at 10 Volts, 3 Amps and 50Hz.
Two Circuits, with two sets of results are to be examined. In this examination, we are looking specifically at the Current in the Coil. In both scenarios, the Lengths of the Coils will not change, only the configuration of the Coils. The Coil has two strands, bi-filar by its very definition.
Each Wire is 55.6mH individually, 55.6mH parallel and 0.231H Series connected. DC Coil Resistance is 3.8 Ohms each Wire and 1.9 Ohms parallel and 7.8 Ohms Series.
Where:L1 and L2's Magnetic Field are in the Same Direction on the Core.
Where:L1 and L2's Magnetic Field are in the Opposite Direction on the Core.
This is an expected behaviour for the Current in the Coil when the Inductance Changes.
For the Magnetic Field in the same direction:
For the Magnetic Field in the opposite direction:
Here we have shown that for the same Resistance, (7.8 Ohms Series), that the Current Flow in the Conductor can move at a MUCH Faster rate even though the Resistance of the Conductor has NOT Changed! This proves that the Magnetic Field Slows the Charge Flow Rates dramatically. The Speed of the Flow Rate, 650 Micro Seconds (𝜇𝑠) compared to 75 milliseconds (𝑚𝑠) for charge time with the Magnetic Field.
The Impedance is now Reduced, Reduced Impedance Effect, we have lost the components of Inductive Reactance almost entirely. Thus the Impedance (Z) is nearly at zero, only leaving the DC Resistance.
I hope this experiment is valuable to you, as it was for me in understanding how this change in Magnetic Fields can greatly influence the way a Coil behaves!