This paper presents a novel method which is designed to detect the rotor position
at standstill and also low speeds in switched reluctance motor (SRM). In this paper
the inductance of phase winding is added as a part in Colpitts oscillator and will cause
a change in oscillation frequency according to the rotor position. The phase
inductance regularly varies with the rotor position. Experiments were carried out on
three phases SRM 6/4, where the measured frequency of colpitts oscillator was
converted into a voltage value by the frequency to voltage converter and were then
converted into a digital value to be matched with the proposed digital processing. The
Experimental results showed high accuracy in determining the values of phase
inductance, which produced an estimated rotor position accurately and quickly.