Motor block running protection method and device

A technology of motor stalling and motor rotor, applied in emergency protection circuit devices, electrical components, etc., can solve the problem of large misjudgment of motor stalling
CN110350482AActive Publication Date: 2019-10-18SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN HONGMEI INTELLIGENT TECH CO LTD
Publication Date
2019-10-18

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Abstract

The invention provides a motor block running protection method and device. The motor block running protection method comprises the following steps: circularly executing the following N1 to N4 until the motor stops running; N1: obtaining d-axis estimated current, q-axis estimated current, d-axis voltage, q-axis voltage and feedback speed based on FOC vector control; N2: calculating the angle deviation between the actual position and the estimated position of the motor rotor by using the d-axis estimated current, the q-axis estimated current, the d-axis voltage, the q-axis voltage and the feedback speed; N3: counting the block running count value of the current cycle according to the block running count value of the previous cycle; and N4: turning off the PWM wave when the angle deviation isnot less than the preset block running protection threshold and the block running count value of the current cycle period is not less than the preset count threshold so as to realize the block running shutdown protection of the motor. The scheme can perform more effective block running protection of the motor.
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Description

technical field

[0001] The invention relates to the technical field of equipment control, in particular to a motor stall protection method and device. Background technique

[0002] For electrical equipment such as refrigerators and washing machines that rely on motor-driven operation, during the start-up or operation of the motor, motor mechanical jams may occur due to factors such as motor control algorithm errors, unreasonable parameter selection, external forces, and excessive motor load. dead, large vibration, motor demagnetization, etc. The motor is mechanically stuck, the vibration is large, the motor demagnetization, etc. will cause the motor to stall, and the motor will be damaged if the motor stalls for too long.

[0003] At present, the motor stall protection method mainly uses the comparison between the operating voltage value and the wave voltage threshold value. If the operating voltage value is less than the minimum value of the product of the wave voltage thr...

Claims

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