Washing appliance and control method thereof

摘要

Control method for a washing household appliance comprising a drainage pump unit with an impeller and a motor supplied with an alternating supply voltage of a determined frequency from among a plurality of possible preset frequencies. According to one implementation the method involves an adjustment stage in which the frequency of the motor supply voltage is regulated between the preset frequencies. The method also includes an application stage in which a stator voltage is applied to the motor, the frequency of the motor supply voltage being regulated between the preset frequencies in accordance with the stator voltage applied.

主权项

1. An appliance comprising
a drain pump capable of operating in a full-flow drainage mode, the drain pump having an impeller and a motor configured to be supplied with an alternating supply voltage that drives the impeller, the motor comprising a stator, a controller adapted to apply a stator voltage to the motor according to the frequency of the alternating supply voltage and to control the frequency of the alternating supply voltage among a plurality of predetermined frequencies when the drain pump is operated in the full drainage mode, a storage medium associated with the controller that stores for each predetermined frequency a maximum component q value of the stator voltage, a minimum component q value of the stator voltage and a pre-set optimal component q value of the stator voltage; and the controller storing computer implemented instructions that when executed (a) determines an initial component q value of the stator voltage when an alternating supply voltage is first supplied to motor when the drain pump is operated in the full-flow drainage mode, the alternating supply voltage corresponding to one of the plurality of predetermined frequencies, (b) compares the initial component q value of the stator voltage with the corresponding pre-set optimal component q value of the stator voltage for the predetermined frequency, (c) monitors the component q value of the stator voltage applied to the motor to determine if the monitored component q value of the stator voltage is between the maximum component q value of the stator voltage and the minimum component q value of the stator voltage, (d) upon determining that the monitored component q value of the stator voltage is between the maximum component q value of the stator voltage and the minimum component q value of the stator voltage, compares the monitored component q value of the stator voltage with the optimal component q value of the stator voltage, and (e) adjusts the frequency of the alternating supply voltage among the plurality of predetermined frequencies to cause the monitored component q value of the stator voltage to more closely match the optimal component q value of the stator voltage.