CN102774720B - Elevator overload protection method - Google Patents
Elevator overload protection method Download PDFInfo
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- CN102774720B CN102774720B CN201210292020.1A CN201210292020A CN102774720B CN 102774720 B CN102774720 B CN 102774720B CN 201210292020 A CN201210292020 A CN 201210292020A CN 102774720 B CN102774720 B CN 102774720B
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- elevator
- overload
- electromagnetic brake
- door
- instruction
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Abstract
Elevator overload protection method.When elevator cars with full load or overload operation, the electronic torque maximum of elevator output.If LOAD CELLS now lost efficacy, easily there is " at the bottom of crouching " accident.The inventive method comprises the steps: that elevator is instructed (3) by elevator master computer (4) by traffic direction after running and the traffic direction of elevator detected, if running up, then judge that whether the actual motion direction of elevator is upwards, if running up, belongs to normal condition by photoelectric encoder (1)；If run downwards, then metering photoimpact number tries to achieve range ability, when distance is more than 100mm, described elevator master computer sends instruction, by driving switch (7) to disconnect the power supply of electromagnetic brake, make electromagnetic brake action, by elevator stopping in door district, then open the door and put people and be concurrently out of order warning.This product is protected for elevator overload.
Description
Technical field:
The present invention relates to elevator electrical and control technical field, be specifically related to a kind of elevator overload protection method.
Background technology:
Elevator is increasingly extensive as the application in modern society of a kind of vertical transport vehicles.Elevator safety technology is
One important problem.When elevator cars with full load or overload operation, the electronic torque maximum of elevator output.If biography of weighing now
Sensor lost efficacy, and " at the bottom of crouching " accident easily occurs.
CN01807760.9 discloses one " Weight detector of elevator ", and CN02142456.X discloses one
" for the device of blocking parachute of elevator equipment ", CN01118513.9 discloses one, and " elevator releasing brake is got rid of poverty and is prevented from being used to
The protection device of property sliding ", these three patents are all mechanical means.The present invention, from electrical control angle, solves elevator
Overload operation problem.
The overload operation of elevator occurs to run up first and fourth quadrant, i.e. heavy duty to run downwards with heavy duty.Typically
In the case of elevator normal operation, when overload, elevator can be reported to the police and open the door without the accident occurring overload to cause.But weighing
Sensor fault or because of maintenance door machine weighed overload linkage signal shielding time, now car overload elevator still can danger close ground
Run, easily cause personal injury.
When elevator is operated in first quartile, if door machine is weighed, overload linkage signal is shielded or LOAD CELLS lost efficacy
Time, overload capacity is relatively big and after running up starting, usually makes elevator in the opposite direction because of electromagnetic torque drive lacking
Glide, until elevator stops after colliding buffer.Car can stop in pit and wait for rescue.Here this type of fault is referred to as
" first kind overload fault ".
When elevator is operated in fourth quadrant, if door machine is weighed, overload linkage signal is shielded or LOAD CELLS lost efficacy
Time, elevator overload runs downwards, and hoisting motor provides braking moment.Hoisting motor provide torque direction upwards, with fortune
Dynamic in opposite direction.Now hoisting motor is in generating state.If now overload capacity is relatively big, stalling current can be more than motor
Rated current, converter and motor are in overload, and car speed also can be slightly above normal speed, but not yet reaches electricity
Magnetic brake and the working value of safety tongs.Now elevator is in extremely hazardous state.When elevator needs to stop, converter needs
Thering is provided bigger stalling current, hoisting motor need to provide bigger braking moment that car just can be made to run slowly, until sedan-chair
Railway carriage or compartment stops.Converter is all likely to be breached overload limit with motor and is protected in the process, makes traction machine main circuit have a power failure.
Cause electromagnetic brake action because of dead electricity.Electromagnetic brake action with regard to dead electricity, meeting when car speed is not reduced to the lowest
Causing car strenuous vibration during being decelerated to zero rapidly, such elevator faults often causes the injures and deaths thing of passenger
Therefore.Here this type of fault is referred to as " Equations of The Second Kind overload fault ".This type of overload Failure risk is bigger.
Summary of the invention:
It is an object of the invention to provide a kind of elevator overload protection method, it is possible to judge accurately elevator whether overload and
Carry out elevator overload protection.
Above-mentioned purpose is realized by following technical scheme:
A kind of elevator overload protection method, the method comprises the steps: that elevator is passed through by elevator master computer after running
Traffic direction command detection, to the traffic direction of elevator, if running up, then judges elevator by photoelectric encoder
Whether actual motion direction is upwards, if running up, belongs to normal condition；If run downwards, then measure
Photoimpact number tries to achieve range ability, and when distance is more than 100mm, described elevator master computer sends instruction, by driving
Switching off the power supply of electromagnetic brake, make electromagnetic brake action, by elevator stopping in door district, then opening the door, it is concurrent to put people
It is out of order warning.
Described elevator overload protection method, if instruction is to run, then by the current detecting of converter DC side downwards
Device detects size of current and direction, if motor electromagnetic torque corresponding to the sense of current is upwards, and current value is beyond setting
During fixed protection threshold values, i.e. can conclude that elevator there occurs " Equations of The Second Kind overload fault ", method of disposal is by described elevator analytic accounting
Calculation machine sends deceleration instruction to converter, and described converter makes hoisting motor slow down, and finally makes elevator stop flat bed nearby
Stopping, open the door and put people and be concurrently out of order warnings, if in braking docking process, converter overtemperature protection makes motor dead electricity,
Then described elevator master computer sends instruction makes electromagnetic brake action, makes lift car force to stop.
Beneficial effect:
1. the present invention is on the premise of without any hardware cost, utilize the existing sensor of elevator, instruction system and
The control rule that the present invention provides, achieves elevator overload by software approach and protects.
. by comparing the reality of the elevator that traffic direction instruction detects with photoelectric encoder when elevator is operated in first quartile
Border traffic direction, can judge whether elevator overloads；If elevator is operated in fourth quadrant, and current value is beyond the protection set
During threshold values, i.e. can conclude that elevator overloads.
. identify and control the basis of " first kind overload fault " and be: (1) photoelectric encoder can not only measuring speed and away from
From, moreover it is possible to measure the rotation direction of motor；(2) in door district, the speed of elevator is the slowest, uses electromagnetic brake permissible
Rapidly by car stop.
Accompanying drawing illustrates:
Fig. 1 is the structured flowchart of overload protecting system of the present invention.
Fig. 2 is the software flow pattern of the present invention.
Detailed description of the invention:
Embodiment 1:
A kind of elevator overload protection method, the method comprises the steps: that elevator is led to by elevator master computer 4 after running
Crossing traffic direction instruction 3 and the traffic direction of elevator detected, if running up, then being judged by photoelectric encoder 1
Whether the actual motion direction of elevator is upwards, if running up, belongs to normal condition；If run downwards,
Then metering photoimpact number tries to achieve range ability, and when distance is more than 100mm, described elevator master computer sends instruction, logical
Switch 7 of overdriving disconnects the power supply of electromagnetic brake 8, makes electromagnetic brake action, by elevator stopping in door district, then opens
Door is put people and is concurrently out of order warning.
Embodiment 2:
Above-mentioned elevator overload protection method, if instruction is to run, then by the current detecting of converter DC side downwards
Device 2 detects size of current and direction, if motor electromagnetic torque corresponding to the sense of current is upwards, and current value exceeds
During the protection threshold values set, i.e. can conclude that elevator there occurs " Equations of The Second Kind overload fault ", method of disposal is by described elevator master
Computer sends deceleration instruction to converter 5, and described converter makes hoisting motor slow down, and finally makes elevator stop nearby
Flat bed is stopped, and opens the door and puts people and be concurrently out of order warnings, if in braking docking process, converter overtemperature protection makes motor lose
Electricity, then described elevator master computer sends instruction makes electromagnetic brake action, makes lift car force to stop.
Embodiment 3:
Above-mentioned elevator overload protection method, the overload protecting system wherein used, its composition includes: elevator host computer
Machine, the information that photoelectric encoder, current sensing means, control operating instruction the most each gather passes to described elevator analytic accounting
Calculation machine, control instruction is passed to control switch and converter by described computer, and order is passed to by described control switch
Electromagnetic brake, described converter passes information to described current sensing means, described converter and motor 6
Connect.
Embodiment 4:
Judge whether elevator surpasses with actual motion direction by comparing command direction when elevator is operated in first quartile
Carry, if elevator is operated in fourth quadrant and current value beyond the protection threshold values set, also can judge that elevator overloads；
By comparing the reality of the elevator that traffic direction instruction detects with photoelectric encoder when elevator is operated in first quartile
Border traffic direction, judges whether elevator overloads；
The size of current detected by the current sensing means of converter DC side and direction, in conjunction with current traffic direction
Instruction, judges whether elevator is operated in fourth quadrant, when current value is beyond the protection threshold values set, i.e. can conclude that elevator is sent out
Give birth to overload；
Elevator stop when overload is made by electromagnetic brake；
Make deceleration of elevator flat bed stop by converter during the non-overtemperature protection of converter, pass through electromagnetism when converter is overheated
Brake makes elevator stop when overload.
Embodiment 5:
Judge whether " first kind overload fault " in conjunction with photoelectric encoder, traffic direction instruction.Specifically judged
Cheng Shi, when elevator master computer obtain from traffic direction instruction run up information after, by photoelectric encoder detection electricity
The actual motion direction of ladder, contrasts with running up information.If the actual motion direction of elevator is to run, then necessarily downwards
Sent instruction apart from interior by master computer, switched off the power supply of electromagnetic brake by driving, make electromagnetic brake action, will
Elevator stopping, in door district, then opens the door and puts people and be concurrently out of order warning.Identify and control the basis of " first kind overload fault "
One is that photoelectric encoder can not only measuring speed and distance, moreover it is possible to measure the rotation direction of motor；Electricity in two Shi Men districts
The speed of ladder is the slowest, and use electromagnetic brake can be rapidly by car stop.Photoelectric encoder and traffic direction instruct all
It is the unit that had of general elevator, it is not necessary to additionally add hardware cost.
Claims (2)
1. an elevator overload protection method, is characterized in that: the method comprise the steps: elevator run after by elevator host computer
Machine, to the traffic direction of elevator is then judged by photoelectric encoder if running up by traffic direction command detection
Whether the actual motion direction of elevator is upwards, if running up, belongs to normal condition；If run downwards,
Then metering photoimpact number tries to achieve range ability, and when distance is more than 100mm, described elevator master computer sends instruction, logical
Overdrive and switch off the power supply of electromagnetic brake, make electromagnetic brake action, by elevator stopping in door district, then open the door and put
People is concurrently out of order warning.
2. according to the elevator overload protection method described in claim 1, it is characterized in that: combine photoelectric encoder, traffic direction refers to
Order judges whether " first kind overload fault ", and concrete judge process is: when elevator master computer obtains coming self-operating side
To instruction run up information after, by the actual motion direction of photoelectric encoder detection elevator, and run up information pair
Ratio, if the actual motion direction of elevator is to run downwards, is then sent instruction by master computer, by driving in certain distance
Switching off the power supply of electromagnetic brake, make electromagnetic brake action, by elevator stopping in door district, then opening the door, it is concurrent to put people
It is out of order warning；
If instruction is to run downwards, then size of current and direction detected by the current sensing means of converter DC side, as
The motor electromagnetic torque that really sense of current is corresponding upwards, and when current value exceeds the protection threshold values set, i.e. can conclude that elevator
There occurs " Equations of The Second Kind overload fault ", method of disposal is to be sent deceleration instruction by described elevator master computer to converter, institute
The converter stated makes hoisting motor slow down, and finally makes elevator stop flat bed nearby stop, and opens the door and puts people and be concurrently out of order warning,
If in braking docking process, converter overtemperature protection makes motor dead electricity, then described elevator master computer send instruction
Make electromagnetic brake action, make lift car force to stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210292020.1A CN102774720B (en) | 2012-08-16 | 2012-08-16 | Elevator overload protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210292020.1A CN102774720B (en) | 2012-08-16 | 2012-08-16 | Elevator overload protection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102774720A CN102774720A (en) | 2012-11-14 |
| CN102774720B true CN102774720B (en) | 2016-09-14 |
Family
ID=47119865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210292020.1A Expired - Fee Related CN102774720B (en) | 2012-08-16 | 2012-08-16 | Elevator overload protection method |
Country Status (1)
| Country | Link |
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| CN (1) | CN102774720B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103213896A (en) * | 2013-04-17 | 2013-07-24 | 无锡市崇安区科技创业服务中心 | Intelligent escalator |
| FI124903B (en) * | 2013-11-01 | 2015-03-13 | Kone Corp | Elevator as well as a method for using the elevator control system to monitor the load on the car and / or to determine the load situation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5039028A (en) * | 1986-09-26 | 1991-08-13 | Akerstroms Bjorbo Ab | Overload protection |
| CN101085662A (en) * | 2007-06-21 | 2007-12-12 | 江苏三上机电制造股份有限公司 | Construction lifter excess load controller |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02249884A (en) * | 1989-03-22 | 1990-10-05 | Mitsubishi Electric Corp | Elevator controller |
| JPH09284992A (en) * | 1996-04-12 | 1997-10-31 | Shintachikawa Kokuki Kk | Overload protector fro lifter |
| JP2006321642A (en) * | 2005-05-20 | 2006-11-30 | Hitachi Building Systems Co Ltd | Car inside load detecting device of elevator |
| JP2010143692A (en) * | 2008-12-17 | 2010-07-01 | Mitsubishi Electric Corp | Elevator device |
-
2012
- 2012-08-16 CN CN201210292020.1A patent/CN102774720B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5039028A (en) * | 1986-09-26 | 1991-08-13 | Akerstroms Bjorbo Ab | Overload protection |
| CN101085662A (en) * | 2007-06-21 | 2007-12-12 | 江苏三上机电制造股份有限公司 | Construction lifter excess load controller |
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| Publication number | Publication date |
|---|---|
| CN102774720A (en) | 2012-11-14 |
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