2 results about "Dehydration Procedure" patented technology

The application provides a fixed-frequency impeller washing machine motor stall detection method and control system, and relates to the technical field of household appliance control. The method comprises the following steps: obtaining a motor starting signal after the fixed-frequency impeller washing machine enters a dehydration program, and controlling the main winding of the single-phase asynchronous motor to start by power-on, while collecting the voltage signal between the two ends of the auxiliary winding of the single-phase asynchronous motor in real time; based on the voltage signal, extracting the voltage change trend feature in the preset time window after the motor starts, and calculating the rising slope of the voltage signal; comparing the rising slope with the preset stall determination threshold; if the rising slope is less than or equal to the stall determination threshold, it is determined that the single-phase asynchronous motor has stalled. The application is used in the process of fixed-frequency impeller washing machine motor stall detection, and solves the technical problem that the prior art cannot quickly and accurately identify the stall state of the fixed-frequency impeller washing machine motor at the initial stage of starting without increasing the hardware cost.

The application discloses a washing machine and a washing machine control method. The washing machine obtains a speed fluctuation value of a motor at a first rotating speed. If the speed fluctuation value of the motor at the first rotating speed is below a first threshold value, the risk of serious shaking of a current drum is excluded. The washing machine further obtains a first over-limit number of times that the speed fluctuation value of the motor at the first rotating speed reaches above a second threshold value. According to the first over-limit number of times within a first preset number of rotations of the inner drum at the first rotating speed and a set number threshold value, it is determined whether to continue to perform a dehydration operation. The determination in combination with the first threshold value and the second threshold value can prevent the drum from seriously shaking when the dehydration operation is performed, thereby preventing the problem of collision with the cabinet. In addition, the determination can prevent the washing machine from being unable to enter a predetermined dehydration rotating speed for dehydration due to excessive interruption of the dehydration program, thereby preventing dehydration delay and even preventing dehydration. The washing machine can normally dehydrate while preventing the drum from seriously shaking.