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Motor stalling detection method and system

A technology of motor stall and detection method, applied in electrical components, emergency protection circuit devices, etc., can solve the problems of fixed preset stall current threshold, affecting the safe operation of the motor, and inability to detect the motor stall event, etc. Achieve the effect of ensuring adaptability and ensuring safe operation

Active Publication Date: 2014-06-04
BEIJING JINGWEI HIRAIN TECH CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a motor stall detection method and system, which solves the problem that in the existing motor stall detection method, because the preset stall current threshold is fixed, it cannot be accurate and accurate in different working environments. Detect the motor stall event in time, thus affecting the technical problem of the safe operation of the motor

Method used

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  • Motor stalling detection method and system
  • Motor stalling detection method and system
  • Motor stalling detection method and system

Examples

Experimental program
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Embodiment 1

[0052] Such as figure 1 Shown is a flow chart of a motor stall detection method of the present invention, and the specific steps of the method may include:

[0053] Step S101: Initialize the preset motor stall current threshold algorithm.

[0054]In the embodiment of the present invention, before the motor stall detection, the timer will be cleared, that is, the time in the preset motor stall current threshold algorithm will be cleared. The motor stall signal is set to 0, so as to achieve the purpose of initializing the preset motor stall current threshold algorithm. It should be noted that, in the embodiment of the present invention, setting the motor stall signal to 0 indicates that the motor stall event has not occurred, and setting the motor stall signal to 1 indicates that the motor stall event has occurred.

[0055] It should be noted that the preset motor stall current threshold algorithm in the embodiment of the present invention is suitable for a motor control syste...

Embodiment 2

[0075] Such as image 3 As shown, it is a flow chart of another motor stall detection method of the present invention, and the specific steps of the method may include:

[0076] Step S301: Initialize the preset motor stall current threshold algorithm.

[0077] Step S302: Detect whether the motor is in running state, if yes, directly execute step S303, if not, end the locked-rotor detection process.

[0078] Step S303: Detect all current values ​​of the motor within a first preset time.

[0079] In practical applications, when it is determined that the motor is in the running state, the timer will be started to start timing, and at the same time, the current of the motor will be detected until the timing reaches the first preset time.

[0080] Step S304: judging whether there is a peak value of the starting current of the motor among all the current values, if yes, execute step S305; if not, execute step S306.

[0081] Wherein, the starting current of the motor is the actual...

Embodiment 3

[0092] Such as Figure 4 As shown, it is a schematic structural diagram of a motor stall detection system of the present invention, and the system may include:

[0093] The initialization module S401 is used to initialize the preset motor stall current threshold algorithm.

[0094] In practical applications, according to the parameters that need to be initialized, an initialization program that realizes the initialization process can be written and loaded into the initialization module S401 in advance, when the parameters in the preset motor stall current threshold algorithm need to be initialized , it only needs that the initialization module S401 executes the preloaded initialization program.

[0095] The first detection module S402 is configured to detect the maximum current value of the motor within a first preset time when it is determined that the motor is in a running state.

[0096] Preferably, in order to avoid generation of useless work caused by performing motor s...

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Abstract

The invention provides a motor stalling detection method and system. The motor stalling detection method comprises the steps that when initialization of a preset motor stalling threshold algorithm is completed and it is determined that a motor is in an operating state, the maximum current value of the motor in a first preset period of time is detected and is led into the preset motor stalling threshold algorithm to enable a current motor stalling current threshold to be obtained, and the adaptability of the current motor stalling current threshold to the current operating environment of the motor is guaranteed; then, when it is judged that the current value of the motor in a second preset period of time is constantly larger than the current motor stalling current threshold, a motor stalling signal is designed to be one, the motor is controlled to stop rotating, whether motor stalling of a system occurs can be detected more accurately and more timely when the motor works in different operating environments, the situation that the motor is burnt down due to the fact that the stalling current of the motor is larger than the rated current of the motor for a long time is avoided, and thus it is guaranteed that the motor can operate safely in different operating environments.

Description

technical field [0001] The present invention relates to the technical field of motor control, and more specifically relates to a motor stall detection method and system. Background technique [0002] In the actual application of the motor, when the motor is blocked by an object, if the motor control system cannot stop driving the motor in time, after a period of time, the locked-rotor current will always be much greater than the rated value of the motor. Therefore, in order to ensure the safe use of the motor, the motor control system usually has a stall detection function, so that the drive to the motor can be stopped as soon as possible when the motor is blocked. [0003] At present, the existing detection methods for motor stalling are usually to preset a stalling current threshold. During the operation of the motor, when it is detected that the current value of the motor is greater than the preset stalling current threshold, it is determined that at this time When a mot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/085
Inventor 周志爽
Owner BEIJING JINGWEI HIRAIN TECH CO INC
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