In the paper titled “Analysis of the Coupling Coefficient in Inductive Energy Transfer Systems” [1], Equation is the voltage drop across the secondary coil and is written as
However, the correct expression is
In addition, the mutual inductance in Equation should be squared, resulting in
As a result, the mutual inductance in Equation (19) must also be corrected, yielding
Finally, the mutual inductance measured when the secondary coil is shorted, shown in Equation , should be written as
Now, the substitution of Equation in Equation of [1] results in the expression given by Equation .