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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

Active Publication Date: 2019-10-18
SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the motor stall will affect the voltage, current and speed, and judging whether the motor is stalled only by the voltage makes the probability of misjudgment of the motor stall is relatively high

Method used

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  • Motor block running protection method and device
  • Motor block running protection method and device

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Embodiment Construction

[0070] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.

[0071] like figure 1 As shown, the embodiment of the present invention provides a motor stall protection method, which is applied to the driver, and the method may include the following steps:

[0072] Step 101: Based on FOC vector control, obtain d-axis estimated current, q-axis estimated current, d-axis voltage, q-axis voltage and feedback speed;

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/085
CPCH02H7/085
Inventor 任艳华唐婷婷王声纲杨正朱绯
Owner SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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