Method for estimating a torque of an asynchronous electric machine of an electric vehicle, in particular a railway vehicle, comprising: receiving at least a measurement of a first phase current and a second phase current of the asynchronous electric machine; receiving a rotor rotational speed (ω m) of the asynchronous electric machine; calculating an estimated torque based on the rotor rotational speed of the electric machine and the first and second phase current, the estimated torque is calculated based on the following equation: T est = K1 * np * Lm * Id * Iq, wherein np is the number of pole pairs of the asynchronous electric machine, Lm is the nominal value of an inductance of the asynchronous electric machine, and Id is a direct current and Iq is a quadrature current based on the first phase current and the second phase current, and K1 is an optional adjustment factor, characterized by further comprising: estimating a stator frequency (Fs) of the stator of the electric machine using a phase locked loop based on the first and/or the second phase current (i1, i2), wherein the first phase current and the second phase current is transformed to a direct current (Id) and a quadrature current (Iq) of a rotating coordinate system rotating with the electrical slip pulsation of the machine based on the first phase current, the second phase current and the rotor speed (ω m), wherein the electrical rotational angle is determined using the equation θ = np ∫( ω s - ω r), with θ being the electrical rotational angle of the slip pulsation, ωr the rotor pulsation and ω s the stator pulsation, wherein the rotor angular speed (ω m) of the electric machine is multiplied by the number of pole pairs (np) to provide the rotor pulsation (ω r), wherein the stator frequency (Fs) determined by the phased lock loop is converted to the stator pulsation (ω s). receiving at least a measurement of a first phase current and a second phase current of the asynchronous electric machine; receiving a rotor rotational speed (ω m) of the asynchronous electric machine; calculating an estimated torque based on the rotor rotational speed of the electric machine and the first and second phase current, the estimated torque is calculated based on the following equation: T est = K1 * np * Lm * Id * Iq, wherein np is the number of pole pairs of the asynchronous electric machine, Lm is the nominal value of an inductance of the asynchronous electric machine, and Id is a direct current and Iq is a quadrature current based on the first phase current and the second phase current, and K1 is an optional adjustment factor, characterized by further comprising: estimating a stator frequency (Fs) of the stator of the electric machine using a phase locked loop based on the first and/or the second phase current (i1, i2), wherein the first phase current and the second phase current is transformed to a direct current (Id) and a quadrature current (Iq) of a rotating coordinate system rotating with the electrical slip pulsation of the machine based on the first phase current, the second phase current and the rotor speed (ω m), wherein the electrical rotational angle is determined using the equation θ = np ∫( ω s - ω r), with θ being the electrical rotational angle of the slip pulsation, ωr the rotor pulsation and ω s the stator pulsation, wherein the rotor angular speed (ω m) of the electric machine is multiplied by the number of pole pairs (np) to provide the rotor pulsation (ω r), wherein the stator frequency (Fs) determined by the phased lock loop is converted to the stator pulsation (ω s).