CN106026025A - Adjustment and calibration method and system for motor overload protection - Google Patents
Adjustment and calibration method and system for motor overload protection Download PDFInfo
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- CN106026025A CN106026025A CN201610585187.5A CN201610585187A CN106026025A CN 106026025 A CN106026025 A CN 106026025A CN 201610585187 A CN201610585187 A CN 201610585187A CN 106026025 A CN106026025 A CN 106026025A
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- Prior art keywords
- current
- motor
- preset requirement
- initial protective
- differential
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0856—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load characterised by the protection measure taken
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- Control Of Electric Motors In General (AREA)
Abstract
The invention provides an adjustment and calibration method and an adjustment and calibration system for motor overload protection. The adjustment and calibration method comprises the steps of: acquiring operating currents of a motor in real time; judging whether a current difference value between the operating current of the motor at each moment and a corresponding initial protective current satisfies a preset requirement; and adjusting the current to be an initial protective current satisfying the preset requirement when judging that the current difference value does not satisfy the preset requirement, so as to adjust the initial protective current. The adjustment and calibration method provided by an embodiment of the invention realizes automatic adjustment and calibration of the protective current, further can perform accurate overload protection on the motor according to the adjusted and calibrated protective current, reduce the situations that the motor is damaged due to overload, and improve the working efficiency.
Description
Technical field
The present invention relates to technical field of industrial control, particularly to adjusting process and the system of a kind of motor overload protection.
Background technology
At present, the overload protection of motor is generally and uses thermorelay to realize, the wherein protection act threshold of thermorelay
Value is adjusting of realizing of the protection value knob by thermorelay itself, such as, if the protection value knob choosing of thermorelay
It is scheduled on A scale, then when the operating current of motor is more than A, thermorelay will play a role, and control circuit disconnects,
Thus realize the protection to motor.But there is problems of, although the protection value knob of thermorelay has scale, but
Being that technical staff is not easy to set accurate protection value by protection value knob, therefore, the protection value of setting may be long-range
In the actual value of the operating current of motor, cause thermorelay can not play the purpose effectively protecting motor.Additionally,
After a scale selected by the knob of thermorelay, the most no longer adjust, and motor from start to normally to work whole during
Demand to protection threshold value is change, and therefore prior art does not fully meet the needs of motor overload protection.
Summary of the invention
It is contemplated that one of solve above-mentioned technical problem the most to a certain extent.
To this end, the first of the present invention purpose is to propose the adjusting process of a kind of motor overload protection.This adjusting process
Achieve the automatization's adjustment to protective current, and then according to the protective current after adjustment, motor can be carried out mistake accurately
Carry protection, reduce the situation that motor damages because of overload, promote work efficiency.
Second object of the present invention is to propose the adjustment system of a kind of motor overload protection.
For reaching above-mentioned purpose, the embodiment of first aspect present invention proposes the adjusting process of a kind of motor overload protection, should
Adjusting process includes: the operating current of Real-time Collection motor；Judge that the described motor operating current in each moment is with right
Whether the current differential between the initial protective current answered meets preset requirement；If it is determined that there is not met in described current differential
The situation of preset requirement, then be adjusted to meet the initial protective current of preset requirement, to carry out whole to described initial protective current
Fixed.
The adjusting process of the embodiment of the present invention, compares real work electric current and the initial protective current of motor, in reality
Current differential between border operating current and corresponding initial protective current is unsatisfactory for during preset requirement carrying out initial protective current
Adjust, it is achieved thereby that the automatization's adjustment to protective current, and then according to the protective current after adjustment, motor can be entered
The accurate overload protection of row, reduces the situation that motor damages because of overload, promotes work efficiency.
Second object of the present invention is to propose the adjustment system of a kind of motor overload protection, including: current collector
And PLC, wherein, described current collector is connected with described motor, for the work of motor described in Real-time Collection
Make electric current；Described PLC is connected with described current collector, and described PLC includes: communication unit, is used for
Receive the operating current of the described motor of described current collector Real-time Collection: processing unit, described processing unit is with described
Communication unit is connected, for judging that described motor is between the operating current and corresponding initial protective current in each moment
Whether current differential meets preset requirement, and when judging the situation that not met preset requirement occurs in described current differential, regulation
For meeting the initial protective current of preset requirement, so that described initial protective current is adjusted；Memory element, described storage
Unit is connected with described processing unit, is used for storing described initial protective current.
Adjustment system in the embodiment of the present invention, compares real work electric current and the initial protective current of motor,
When current differential between real work electric current and corresponding initial protective current is unsatisfactory for preset requirement, initial protective current is entered
Row sum-equal matrix, it is achieved thereby that the automatization's adjustment to protective current, and then can be according to the protective current after adjustment to motor
Carry out accurate overload protection, reduce the situation that motor damages because of overload, promote work efficiency.
Aspect and advantage that the present invention adds will part be given in the following description, and part will become bright from the following description
Aobvious, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage the accompanying drawings below description to embodiment will be apparent from from combining and
Easy to understand, wherein:
Fig. 1 is the flow chart of the method for the motor overload protection of one embodiment of the invention；
Fig. 2 (a) is the schematic diagram of the relation of the real work electric current of motor and the initial protective current before adjusting；
Fig. 2 (b) is the schematic diagram of the relation of the real work electric current of motor and the protective current after adjusting；
Fig. 3 is the flow chart of the adjusting process of the motor overload protection of one specific embodiment of the present invention；And
Fig. 4 is the structural representation of the adjustment system of the motor overload protection of one embodiment of the present of invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings adjusting process and the system of the motor overload protection of the embodiment of the present invention are described.
Fig. 1 is the flow chart of the adjusting process of the motor overload protection of one embodiment of the invention.
As it is shown in figure 1, the adjusting process of this motor overload protection comprises the following steps:
S110, the operating current of Real-time Collection motor.
Specifically, by the operating current of current collector Real-time Collection motor, wherein, current collector can be such as
Multifunctional meter.The operating current of the motor of Real-time Collection is reported to PLC (Programmable Logic by current collector
Controller, programmable logic controller (PLC)).
S120, it is judged that whether motor current differential between the operating current and corresponding initial protective current in each moment
Meet preset requirement.
Wherein, initial protective current can be stored in advance in PLC, before the non-adjustment being i.e. stored in PLC
Protective current, this initial protective current is for protecting motor, when the operating current of motor is more than initial protection
During electric current, control circuit disconnects, thus realizes the protection to motor.
The real work electric current of the motor of Real-time Collection is compared by PLC with initial protective current, it is judged that each
Whether the current differential between the initial protective current that the real work electric current in moment is corresponding with this moment meets preset requirement.Its
In, when the motor real work electric current in each moment is in default electricity less than corresponding initial protective current and current differential
When stream is interval, it is judged that current differential meets preset requirement.
Wherein, it is 10% that the pre-set interval of above-mentioned current differential typically may be configured as overload margin, and i.e. the value of protective current is than electricity
The value of the actual operating current of motivation improves 10%.
S130, if it is determined that the situation of not met preset requirement occurs in current differential, then is adjusted to meet the initial of preset requirement
Protective current, to adjust to initial protective current.
Specifically, if PLC judges that motor is in the real work electric current in certain or some moment and initial protection
There is the situation of not met preset requirement in current differential between electric current, then regulate corresponding protective current so that current differential is full
Foot preset requirement, thus initial protective current is adjusted.
For example, before the initial protective current of motor is adjusted, the real work electric current in each moment of motor
With initial protective current such as Fig. 2 (a) Suo Shi, when the 3rd second, the real work electric current of motor is 10A, and the most initially protects
Protecting electric current is 14A.Now, the real work electric current of motor and the current differential of initial protective current are 4A, exceed well over
The 10% of the real work electric current 10A of motor, i.e. 1A, say, that the value of initial protective current now is too high,
Do not have the protective effect to motor.Therefore initial protective current 14A is adjusted, by protective current by PLC
It is adjusted to 11A.
The most such as, as shown in Fig. 2 (a), when the 6th second, the real work electric current of motor was 5A, and the most initially protects
Protecting electric current is 5.1A.Now, the real work electric current of motor and the current differential of initial protective current are 0.1A, are much smaller than
The 10% of the real work electric current 10A of motor, i.e. 1A, say, that the value of initial protective current now is too low,
The protective effect to motor is not had yet.Therefore initial protective current 5.1A is adjusted by PLC, will protection
Electric current is adjusted to 5.5A.
And then, PLC is after being adjusted initial protective current, after can obtaining adjusting as shown in Fig. 2 (b)
Protective current, so that it is guaranteed that PLC is after formal production, the protective current after adjusting in PLC can be right
Motor carries out accurate overload protection so that motor obtains good protected effect in running.
The adjusting process of the embodiment of the present invention, compares real work electric current and the initial protective current of motor, in reality
Current differential between border operating current and corresponding initial protective current is unsatisfactory for during preset requirement carrying out initial protective current
Adjust, it is achieved thereby that the automatization's adjustment to protective current, and then according to the protective current after adjustment, motor can be entered
The accurate overload protection of row, reduces the situation that motor damages because of overload, promotes work efficiency.
Fig. 3 is the flow chart of the adjusting process of the motor overload protection of one specific embodiment of the present invention.
As it is shown on figure 3, the adjusting process of this motor overload protection includes:
S310, the operating current of Real-time Collection motor.
S320, it is judged that whether motor current differential between the operating current and corresponding initial protective current in each moment
Meet preset requirement.
S330, if it is determined that the situation of not met preset requirement occurs in current differential, then is adjusted to meet the initial of preset requirement
Protective current, to adjust to initial protective current.
S340, if it is determined that the current differential that motor is between the operating current and corresponding initial protective current in each moment
Meet preset requirement, then keep current initial protective current constant.
Specifically, if PLC judges that motor is between the real work electric current of current time and initial protective current
Current differential meet preset requirement, i.e. motor at the real work electric current of current time less than corresponding initial protective current
And current differential is when being in predetermined current interval, initial protective current is not adjusted, keeps the big of current initial current
Little constant.
It addition, in another embodiment of the present invention, the operating current of display motor and initial protective current.Namely
Saying, technical staff can check the real work electric current of motor and initial protective current on current collector intuitively.Additionally,
PLC can calculate the current differential between the real work electric current of motor and initial protective current in real time, and by this electricity
Stream difference sends and shows to current collector so that the overload protection visualization of motor.
The adjusting process of the embodiment of the present invention, at the electric current judged between the real work electric current of motor and initial protective current
When difference meets pre-set interval, the initial protective current keeping current is constant, and can show electricity on current collector in real time
The real work electric current of motivation and initial protective current and the difference of the two, and then according to current initial protective current to electricity
Motivation carries out overload protection, it is achieved thereby that motor carries out accurate overload protection, reduces motor and damages because of overload
Situation occur.
In order to realize above-described embodiment, the invention allows for the adjustment system of a kind of motor overload protection.
Fig. 4 is the structural representation of the adjustment system of the motor overload protection of one embodiment of the present of invention.
As shown in Figure 4, the adjustment system of this motor overload protection includes: current collector 100 and PLC 200.
Wherein, PLC 200 includes: communication unit 210, memory element 220 and processing unit 230.
Specifically, current collector 100 is connected with motor, for the operating current of Real-time Collection motor.
PLC 200 is connected with current collector 100, and PLC 200 includes that communication unit 210, storage are single
Unit 220 and processing unit 230, wherein, can use RS485 communication between current collector 100 and communication unit 210
Agreement carries out communication.
Communication unit 210 is for receiving the operating current of the motor of current collector 100 Real-time Collection.
Processing unit 230 is connected with communication unit 210, for judging that the motor operating current in each moment is with corresponding
Whether the current differential between initial protective current meets preset requirement, and is judging that not met preset requirement occurs in current differential
Situation time, be adjusted to meet the initial protective current of preset requirement, so that initial protective current to be adjusted.Wherein, place
Reason unit 230 is additionally operable to when the motor operating current in each moment is in pre-less than corresponding protective current and current differential
If during electric current interval, it is judged that current differential meets preset requirement.
Memory element 220, is connected with processing unit 230, for storing initial protective current.
It should be noted that the aforementioned explanation to the embodiment of the adjusting process of motor overload protection is also applied for this
The adjustment system of the motor overload protection of embodiment, it is similar that it realizes principle, and here is omitted.
The adjustment system of the embodiment of the present invention, compares real work electric current and the initial protective current of motor, in reality
Current differential between border operating current and corresponding initial protective current is unsatisfactory for during preset requirement carrying out initial protective current
Adjust, it is achieved thereby that the automatization's adjustment to protective current, and then according to the protective current after adjustment, motor can be entered
The accurate overload protection of row, reduces the situation that motor damages because of overload, promotes work efficiency.
In one embodiment of the invention, processing unit 230 is additionally operable to when judging the motor operating current in each moment
And when the current differential between corresponding initial protective current meets preset requirement, keep current initial protective current constant.Electricity
Stream harvester 100 is additionally operable to show the operating current of motor and initial protective current.Thus, the reality of motor is being judged
When current differential between operating current and initial protective current meets pre-set interval, the initial protective current keeping current is constant,
And the real work electric current of motor and initial protective current and the difference of the two can be shown on current collector in real time,
And then according to current initial protective current, motor is carried out overload protection, it is achieved thereby that motor is carried out mistake accurately
Carry protection, reduce the situation generation that motor damages because of overload.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or
The implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or hidden
At least one this feature is included containing ground.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", the art such as " fixing "
Language should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be machinery
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units
Connection within part or the interaction relationship of two elements, unless otherwise clear and definite restriction.Ordinary skill for this area
For personnel, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term necessarily
It is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by art personnel
And combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (9)
1. the adjusting process of a motor overload protection, it is characterised in that comprise the following steps:
The operating current of Real-time Collection motor；
Judge that described motor current differential between the operating current and corresponding initial protective current in each moment is the fullest
Foot preset requirement；
If it is determined that the situation of not met preset requirement occurs in described current differential, then it is adjusted to meet the initial guarantor of preset requirement
Protect electric current, so that described initial protective current to be adjusted.
Adjusting process the most according to claim 1, it is characterised in that if it is determined that described motor is in each moment
Current differential between operating current and corresponding initial protective current meets preset requirement, then keep current initial protective current
Constant.
Adjusting process the most according to claim 1 and 2, it is characterised in that show described motor operating current and
Described initial protective current.
Adjusting process the most according to claim 1, it is characterised in that when described motor is at the work electricity in each moment
When stream is in predetermined current interval less than corresponding initial protective current and described current differential, it is judged that described current differential meets
Described preset requirement.
5. the adjustment system of a motor overload protection, it is characterised in that including: current collector and PLC,
Wherein,
Described current collector is connected with described motor, for the operating current of motor described in Real-time Collection；
Described PLC is connected with described current collector, and described PLC includes:
Communication unit, for receiving the operating current of the described motor of described current collector Real-time Collection:
Processing unit, described processing unit is connected with described communication unit, for judging the described motor work in each moment
Make whether the current differential between electric current and corresponding initial protective current meets preset requirement, and judging described current differential
When the situation of not met preset requirement occurs, it is adjusted to meet the initial protective current of preset requirement, with to described initial protection
Electric current is adjusted；
Memory element, described memory element is connected with described processing unit, is used for storing described initial protective current.
Adjustment system the most according to claim 5, it is characterised in that described processing unit is additionally operable to:
When the current differential judged between described motor is at the operating current and corresponding initial protective current in each moment meets
During preset requirement, keep current initial protective current constant.
7. according to the adjustment system described in claim 5 or 6, it is characterised in that described current collector is additionally operable to:
Show the operating current of described motor and described initial protective current.
Adjustment system the most according to claim 5, it is characterised in that described processing unit is additionally operable to:
When the described motor operating current in each moment is in default electricity less than corresponding protective current and described current differential
When stream is interval, it is judged that described current differential meets described preset requirement.
Adjustment system the most according to claim 5, it is characterised in that described current collector and described communication unit it
Between use RS485 communications protocol carry out communication.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610585187.5A CN106026025B (en) | 2016-07-22 | 2016-07-22 | The adjusting process and system of motor overload protection |
| PCT/CN2017/092421 WO2018014753A1 (en) | 2016-07-22 | 2017-07-10 | Adjustment and calibration method and system for electric motor overload protection |
| ZA2018/08520A ZA201808520B (en) | 2016-07-22 | 2018-12-18 | Adjustment and calibration method and system for electric motor overload protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610585187.5A CN106026025B (en) | 2016-07-22 | 2016-07-22 | The adjusting process and system of motor overload protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106026025A true CN106026025A (en) | 2016-10-12 |
| CN106026025B CN106026025B (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610585187.5A Active CN106026025B (en) | 2016-07-22 | 2016-07-22 | The adjusting process and system of motor overload protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018014753A1 (en) * | 2016-07-22 | 2018-01-25 | 中国恩菲工程技术有限公司 | Adjustment and calibration method and system for electric motor overload protection |
| CN115333046A (en) * | 2021-12-31 | 2022-11-11 | 天津市中力防雷技术有限公司 | Self-adjusting protection method for motor |
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| CN101931206A (en) * | 2010-08-25 | 2010-12-29 | 常熟开关制造有限公司(原常熟开关厂） | Over-current protection method |
| CN102110555A (en) * | 2009-12-24 | 2011-06-29 | 张世兴 | Load variation tracking automatic rated value breaker |
| CN203398761U (en) * | 2013-08-02 | 2014-01-15 | 浙江天正电气股份有限公司 | Integrated protector of motor |
| CN205901269U (en) * | 2016-07-22 | 2017-01-18 | 中国恩菲工程技术有限公司 | Motor overload protection's timing system |
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2016
- 2016-07-22 CN CN201610585187.5A patent/CN106026025B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110555A (en) * | 2009-12-24 | 2011-06-29 | 张世兴 | Load variation tracking automatic rated value breaker |
| CN101931206A (en) * | 2010-08-25 | 2010-12-29 | 常熟开关制造有限公司(原常熟开关厂） | Over-current protection method |
| CN203398761U (en) * | 2013-08-02 | 2014-01-15 | 浙江天正电气股份有限公司 | Integrated protector of motor |
| CN205901269U (en) * | 2016-07-22 | 2017-01-18 | 中国恩菲工程技术有限公司 | Motor overload protection's timing system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018014753A1 (en) * | 2016-07-22 | 2018-01-25 | 中国恩菲工程技术有限公司 | Adjustment and calibration method and system for electric motor overload protection |
| CN115333046A (en) * | 2021-12-31 | 2022-11-11 | 天津市中力防雷技术有限公司 | Self-adjusting protection method for motor |
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| Publication number | Publication date |
|---|---|
| CN106026025B (en) | 2019-02-01 |
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