Drive systems comprising sliding mode observer, and procedures for controlling derselbigen

At least one exemplary embodiment discloses a method for estimating a position of a rotor in a motor. The method includes determining a first estimated position of the rotor using a first algorithm, determining a second estimated position of the rotor using a second algorithm, the second algorithm of the first algorithm is different, determining a first error based on the first estimated position and said second estimated position and determining a third estimated position of the rotor based on the first error.