A METHOD AND SYSTEM OF DETERMINING POSITION OF A SHAFT OF AN ELECTRIC MOTOR OF A HYBRID ELECTRIC VEHICLE

摘要

A method of determining position of a shaft (205) of an electric motor (210) of a hybrid electric vehicle is disclosed. The method comprises receiving signals from a magnetic sensor (207), the signals indicating an angular position of the shaft (205) of the electric motor (210), filtering higher order harmonics from the signals to obtain a first set of filtered signals using a low pass filter (220), calculating harmonic magnitude values based on speed of the shaft (205) in real time, filtering lower order harmonics from the first set of filtered signals to obtain a second set of filtered signals based on the harmonic magnitude values and determine the angular position from the second set of filtered signals. Reference Figure: Figure 1