Laundry treating machine and method for operating a laundry treating machine
Abstract:
A laundry machine having a casing, a drum a motor to rotate the drum, and an inverter-based apparatus to control the motor. The inverter-based apparatus comprises: an input stage configured to convert alternating mains voltage to rectified DC voltage, an electrolytic capacitor-less inverter configured to generate output currents to feed to the electric moto based on duty cycles of switching signals, a DC-link connecting the electrolytic capacitor-less inverter to the input stage and crossed by DC-link currents from/towards the electrolytic capacitor-less inverter, a DC-link capacitor connected to the DC-link, a regulator system configured to control duty cycles of switching signals based on determined/estimated motor values indicating a controlled parameter of said motor, and a motor reference value associated to the controlled parameter of the motor, and an active voltage limiter unit configured to regulate the motor reference value to limit the DC-link capacitor voltage within a predetermined voltage range.
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