Since the Single Turn Coil Domain computes the loop potential, this voltage induced across the coil can be used to compute the mutual
inductance which is given as follows:
The free-space
inductance L (in nanohenries) of a width of U-patch is d and I length, (in microns) given by [10,11].
When a metal particle passes radially above the spiral planar coil, peak
inductance change appears in the metal particle located at the axis of the coil in a spherical coordinate system (R, 0,0) as shown in Figure 2.
Figure 8 shows the calculated mutual
inductance in thick line and its derivative in thin line.
It has a rated Current between 0.45~1.60A, an
inductance value between 10 and 100mH and a DCR between 285 and 2,920mΩ.
5 for the
inductance value of 0.82 mH which is empirically measured for proposed high frequency full bridge converter transformer.
These sensors operate by using built-in electronics to measure the resonant frequency of an oscillator circuit with an inductive probe whose
inductance is varied by the position of the conductive gun-drilled rod over it.
Thus, when a vehicle passes over a loop, we can obtain what is commonly known as "the vehicle magnetic profile" or "the vehicle
inductance signature" by analyzing the
inductance or frequency variation recorded.
That's because the flyback transformer needs to have a primary
inductance value of 530 pH to keep peak currents under 2.3 A, so as not to overstress the external 650 V MOSFET.
The formulas for PCB
inductance and capacitance are complicated: the ones given in Figure 2 and 3 are approximations.
The
inductance of meander line can be calculated from the following expressions