variables that acts on the inverter switch units, causing the DC link voltage Vdc(t) to be clamped to the prefixed value, during the regenerative phase of the electric motor 2 . It is pointed out that both embodiments, i.e. inverter-based apparatus 1 and la, have the technical effect of implement an active clamping of the regenerated DC link current by directly measuring and/or estimating the DC link current and without short the bottom/upper switches. This solve the technical problem of the inverter-based apparatus used in the laundry treating machines, which are characterized by time- varying load and/or by a rapid change of target speed, and are affected by over-voltage spike in DC link caused by the energy regenerated form the motor. For example we may consider a laundry washing machine equipped with an electrical motor controlled by a inverter having electrolytic capacitor, running at regimes lower than the motor base speed (that is the speed at which the motor produce the maximum power and torque). In this condition, the inverter operates safely without any issue of energy regenerated back to the DC link from the electrical motor. However this condition is not valid for the electrolytic capacitor-less inverter of the present invention, wherein the small capacitance value limit the maximum voltage applied to the electric motor and lower the motor base speed. Moreover, over the missing filtering effect of a big tank, like an electrolytic capacitor, increase the possibility to have over voltage spike in the DC link when high unbalance load is present inside the drum. The above disclosed inverter-based apparatus 1 and l a used in the laundry treating machine 100 overcome this problem by implementing the active clamping of the regenerated DC link current by directly estimating the DC link current and without short the bottom/upper switches. Figure 6 is a flow chart of an exemplary control method that may be implemented by the active voltage limiter unit 115 of the inverter-based apparatus l a of the laundry-treating machine 100 to determine the torque limit Tref_lim according to the second embodiment of the present invention. In the exemplary embodiment, the active voltage limiter unit 115 is configured