Motor stall protection control method and device

Abstract

The embodiment of this specification provides a motor stall protection control method and device. The method includes: determining the resistance of the motor, setting the first current threshold, and determining the corresponding first power threshold according to the first current threshold and the resistance; obtaining the first three Phase current, determine the first q-axis estimated current according to the first three-phase current, and determine the corresponding first power value according to the first d-axis estimated current and resistance; determine whether the first q-axis estimated current reaches the first current threshold and the first Whether a power value reaches the first power threshold; if the first q-axis estimated current reaches the first current threshold and the first power value reaches the first power threshold, and the first q-axis estimated current remains at the first current threshold and the first power If the time period for which the value remains at the first power threshold reaches the first time period, it is determined that the motor is locked when starting, and the motor is shut down for protection. The invention can prolong the service life of the motor.

Description

technical field [0001] One or more embodiments of this specification relate to the technical field of washing machines, and in particular, to a method and device for controlling motor stall protection. Background technique [0002] For electrical equipment such as refrigerators, air conditioners, washing machines, etc., during the start-up and operation of the motor, the motor may be blocked due to factors such as the internal mechanical structure of the motor, external forces, inaccurate control algorithms, or unreasonable parameter selection, which may easily cause The motor is mechanically stuck, the vibration is large, the motor is demagnetized, and the motor is damaged. Therefore, it is necessary to provide a stall judgment mechanism. Contents of the invention [0003] One or more embodiments of this specification describe a method and device for controlling speed reduction of a drum washing machine. [0004] According to the first aspect, a speed reduction control m...

AI Technical Summary

Problems solved by technology

[0002] For electrical equipment such as refrigerators, air conditioners, washing machines, etc., during the start-up and operation of the motor, the motor may be blocked due to factors such as the internal mechanical structure of the motor, external forces, inaccurate control algorithms, or unreasonable parameter selection, which may easily cause The motor is mechanically stuck, the vibration is large, the motor is demagnetized and the motor is damaged, so it is necessary to provide a stall judgment mechanism

Images