Methods for determining inductance and resistance of an inductor

摘要

A resistor (having a resistance of R_s) is connected in series with an inductor whose inductance and/or resistance is desired to be determined. An alternating voltage (such as a sinusoidal voltage) is applied across the series-connected resistor and inductor, wherein the alternating voltage has a frequency omega, a unique maximum or minimum value V_m, an average value and a unique crossover of the average value. The voltage V_r is measured across the resistor when the alternating voltage is at its maximum or minimum value. The voltage V_l is measured across the resistor when the alternating voltage is at its average value. The resistance R_L of the inductor is calculated from an equation in which R_L is a function of V_m, V_r , R_s and V_l. The inductance L of the inductor is calculated from an equation in which L is a function of V_l, R_l, R_s, V_r and omega.