Drum washing machine and its inertia detection method and inertia detection device

Abstract

The invention discloses a roller washing machine and an inertia detection method and device of the roller washing machine. The inertia detection method includes the following steps that the position of a rotor of a motor is detected when a roller rotates at constant speed, and feedback speed of the motor is calculated according to the position of the rotor; according to the position of the rotor and the feedback speed, the roller position corresponding to the maximum speed fluctuation point or the minimum speed fluctuation point is obtained through unbalance position estimation; an acceleration instruction is generated at the roller position corresponding to the maximum speed fluctuation point or the minimum speed fluctuation point to control the motor to operate in an accelerated mode, and integration is performed on electromagnetic torque on an acceleration operation section to obtain a first integration result; a deceleration instruction is generated at the roller position corresponding to the maximum speed fluctuation point or the minimum speed fluctuation point to control the motor to operate in a decelerated mode, and integration is performed on electromagnetic torque on a deceleration operation section to obtain a second integration result; according to the first integration result and the second integration result, the inertia of the roller washing machine is calculated. According to the method, influences of load unbalance can be considered, so that detection precision is improved.

Description

Technical field [0001] The present invention relates to the technical field of washing machines, in particular to an inertia detection method and an inertia detection device of a drum washing machine, and a drum washing machine with the inertia detection device. Background technique [0002] In order to realize the automatic water intake of the washing machine and the correction compensation for measurement, it is necessary to measure the weight of the clothes in the washing machine barrel. At present, there are two main methods for measuring the weight of clothes: one is to directly measure the weight of the clothes with a load cell; the other is to use the drive motor in the washing machine to measure the inertia of the clothes in the drum, because the weight and the inertia are basically the same Proportional, according to the proportional relationship between them, inertia can be converted into weight. Among them, the related art discloses a drum type washing machine (public...

AI Technical Summary

Problems solved by technology

However, when the load inertia is detected through acceleration and deceleration, if the load is unbalanced, the acceleration and deceleration waveforms will be asymmetrical, which will greatly affect the detection accuracy and cause the weighing error of the washing machine, which cannot meet the needs of users.

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