CN203166472U - Electrical equipment protective device - Google Patents
Electrical equipment protective device Download PDFInfo
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- CN203166472U CN203166472U CN 201320097444 CN201320097444U CN203166472U CN 203166472 U CN203166472 U CN 203166472U CN 201320097444 CN201320097444 CN 201320097444 CN 201320097444 U CN201320097444 U CN 201320097444U CN 203166472 U CN203166472 U CN 203166472U
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- electric equipment
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- temperature
- protective device
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Abstract
The utility model relates to an electrical equipment protective device, comprising an environment temperature measuring module, a current measuring module, a clock module, a data storage module, a parameter setting module, a status indicator module, an alarm module, an operating state control module, a data processing and control module, a power module and a voltage monitoring module. The device controls status of a piece of electrical equipment according to temperature rise of the electrical equipment, thereby having effect of protection. A circuit structure is simple, and the device has relatively good practical value.
Description
Technical field
The utility model relates to electric equipment resist technology field, particularly a kind of electric equipment protecting means.
Background technology
The loss that the electric equipment course of work produces is converted into heat raises the electric equipment temperature, and too high temperature can cause the insulation of electrical installation quick aging even burn electric equipment.Do not having under the situation of fault, the temperature of electric equipment can not surpass its tolerance value during rated operational current, and whether can to surpass its tolerance value then relevant with the overcurrent time with the overcurrent multiple for the temperature of electric equipment during the operating current overrate of electric equipment.Electric equipment can cause economic loss because overcurrent burns, and the protective device misoperation can cause economic loss equally.Therefore, protective device not only should be protected electric equipment to avoid high temperature and damage, and should guarantee the reliability service of electric equipment work.
Existing protection generally adopts the electric current anti-time limit characteristic as protective feature, there is following problem in this way: first, the electric current anti-time limit characteristic is not the thermal characteristics of electric equipment, though the electric current anti-time limit characteristic has various ways available, but its limited amount, the electric current anti-time limit characteristic that is difficult to find the thermal characteristics with electric equipment to be complementary; The second, the electric current anti-time limit characteristic does not consider that factors such as ambient temperature, radiating condition and electric equipment initial temperature are to the electric equipment Temperature Influence; The 3rd, anti-time limit characteristic is difficult to be used in the occasion that electric current constantly changes in time.So be necessary to propose a kind of thermal characteristics with electric equipment and be protective feature; consider factors such as ambient temperature, radiating condition and electric equipment initial temperature to the electric equipment Temperature Influence, can be used for electric equipment real time temperature computational methods and the electric equipment protecting means of the occasion that electric current constantly changes in time.
The utility model content
The purpose of this utility model provides a kind of electric equipment protecting means, and can realize can be according to the temperature rise of electric equipment, the state of control apparatus equipment, and then play the effect of protection.
In order to realize above-mentioned purpose of the present utility model; the technical scheme that adopts is as follows; a kind of electric equipment protecting means is characterized in that: this device comprises: be used to protective device that the power module of working power is provided; for data being handled and being handled the ambient temperature measurement module that is used for measuring the electric equipment ambient temperature that is connected with control module according to the data processing that result is controlled device with control module and with these data; be used for measuring the current measurement module of the electric current that flows through electric equipment; be used to protective device that the clock module of time reference is provided; the data memory module that is used for the service data of stored electricity device characteristics parameter and electric equipment; for the parameter that parameter is set module is set; the state indicating module of the information such as temperature that are used for showing the electric equipment operating state and calculate; be used for providing the alarm module of alarm signal; the voltage monitoring module that is used for controlling the running status control module of electric equipment operation state and is used for monitoring and protecting device operating voltage.
In the utility model one embodiment, described clock module has the multiplex operation power supply, and any time has at least one road power supply to provide working power for it.
In the utility model one embodiment, described data memory module has power down data hold function.
Device described in the utility model can be according to once temperature rise and the temperature of the electric equipment operation data computation current time electric equipment before the protective device power down on storing in the work at present state of ambient temperature, electric equipment and the data memory module after powering on, and with its basis as subsequent calculations.
Description of drawings
Fig. 1 is the electric equipment protecting means block diagram that the utility model proposes;
Fig. 2 is the electric equipment protecting means program flow diagram that the utility model proposes.
Embodiment
For making the purpose of this utility model, content and advantage clearer, below in conjunction with accompanying drawing execution mode of the present utility model is done to describe in further detail.
See also Fig. 1, Fig. 1 is present embodiment electric equipment protecting means block diagram, wherein:
Temperature-measuring module is used for measuring the electric equipment ambient temperature, and the temperature rise addition that its numerical value and electric equipment temperature rise computational algorithm calculate is the temperature of electric equipment;
The measurement result of current measurement module be used for to be calculated the expection stable temperature rise of electric equipment, and the relation between the expection stable temperature rise of electric equipment and the electric current is different and different because of electric equipment itself and radiating condition thereof;
Algorithm and time that the utility model proposes are closely related, and the clock module in the device is used to algorithm that time reference is provided, and for guaranteeing the accuracy of time, clock module must possess the working power that multichannel can automatically switch; This clock module can be handled with control module with constant frequency output signal trigger data and carry out temperature rise and temperature computation; And the time of clock module can be handled with control module by data and be read and write;
Data memory module is used for the characterisitic parameter of stored electricity equipment and the service data of electric equipment, and data memory module has the power down hold function; In case and the voltage monitoring module monitors falls to voltage, temperature rise is calculated required data and namely is saved to data memory module, calculates for next temperature rise and uses;
Parameter arranges module and is used for arranging the characterisitic parameter of electric equipment and the temperature preset value of warning and protection, to strengthen the protective device application flexibility;
The state indicating module is used for showing operating state and the alarm signal of electric equipment when work, and shows set parameter when parameter arranges;
Alarm module is used for providing alarm signal when the electric equipment accounting temperature surpasses the alarm temperature preset value;
The running status control module is used for the running status of control electric equipment when the electric equipment accounting temperature surpasses running status control preset value;
Data are handled with control module and are calculated electric equipment temperature rise and temperature according to algorithm or its equivalent algorithm of (1) formula or (2) formula, and judge whether to provide the running status of alarm signal or control electric equipment according to the temperature of calculating and preset temperature value;
Power module is used to protective device that working power is provided, when electric equipment is in the energising operating state, power module can be the whole protecting device reliable working power is provided, and when electric equipment was in off-position, power module can be clock module at least reliable working power is provided;
Can handle with control module to data after the voltage monitoring module monitors is fallen to the operating voltage of protective device and send signal, data handle with control module receive behind the signal can voltage drop into data before writing the minimum operating voltage that allows will the calculating of temperature rise next time required data write data memory module.
In order to allow those skilled in the art better understand advantage and the function of the utility model hardware structure, below algorithm and the program circuit used in our binding modules do simple explanation, be noted that, the utility model is protection hardware circuit framework, does not require protection as for follow-up algorithm and software;
In the present embodiment, the algorithm of electric equipment temperature rise is as follows:
When the heating of electric equipment and radiating condition do not change in time,
tElectric equipment temperature rise constantly
θ t Calculate according to following algorithm:
（1）
Wherein
nIt is the integer greater than zero;
θ Ti Be
θ t Component;
k i Satisfy:
θ ∞Be electric equipment expection stable temperature rise, relevant with electric equipment itself and operating current thereof;
θ 0Be
t=0 o'clock electric equipment temperature rise;
eBe Euler's numbers;
τ i It is thermal time constant.
In addition, also have a kind of discrete form that calculates the algorithm of electric equipment temperature rise, when the heating of electric equipment and radiating condition change in time,
t j Electric equipment temperature rise constantly
θ j Calculate according to following algorithm:
Wherein
nIt is the integer greater than zero;
θ Ji Be
θ j Component;
τ i It is thermal time constant;
θ (
j-1)
i Be
θ i t=
t j-1
Value constantly;
Δ tIt is current time
t j With a last moment
t j-1
Between the time difference, namely
Δ t=
t j -
t j-1
k i Satisfy:
θ ∞
j Be
t j Electric equipment expection stable temperature rise under the operating state is relevant with electric equipment itself and tj moment operating current constantly.
See also Fig. 2; Fig. 2 is the electric equipment protecting means program flow diagram; 1. step was read the temperature rise that deposits in before the last protective device power down and is calculated desired data, the device current the when time value when the equipment temperature rise when mainly comprising power down, power down and power down after protective device powered on from data memory module.
2. step adopts the algorithm of (1) formula or (2) formula or the initial temperature rise that its equivalent algorithm is calculated electric equipment, if the algorithm of (2) formula of employing calculates, then need the time difference segmentation between current time and the power down is constantly repeatedly calculated, to improve computational accuracy.
Step is the operating current of measuring equipment 3., and preferably, measured is the real effective of electric current.And the temperature rise of computing equipment
4. step adopts the algorithm of (1) formula or (2) formula or the real-time temperature rise that its equivalent algorithm is calculated electric equipment.
5. step measures the ambient temperature around the electric equipment.
6. step obtains device temperature with ambient temperature and equipment temperature rise addition.
7. step is delivered to device temperature the state indicating module and is shown.
Whether step 8. judgment device temperature surpasses the preset value of alarm temperature or running status control temperature, enters step 10. if then forward to after 9. step sends the running status of alarm signal or control electric equipment; Otherwise directly enter step 10..
Whether 10. step detects clock trigger signal, and the temperature rise temperature computation that then enters next round is arranged, otherwise continues to wait for clock trigger signal.
The utility model is illustrated according to the preferred embodiment; be to be understood that; above-described embodiment does not limit the utility model in any form, and all employings are equal to replaces or technical scheme that the form of equivalent transformation obtains, all drops within the protection range of the present utility model.
Claims (3)
1. electric equipment protecting means, it is characterized in that: this device comprises: be used to protective device that the power module of working power is provided; for data being handled and being handled the ambient temperature measurement module that is used for measuring the electric equipment ambient temperature that is connected with control module according to the data processing that result is controlled device with control module and with these data; be used for measuring the current measurement module of the electric current that flows through electric equipment; be used to protective device that the clock module of time reference is provided; the data memory module that is used for the service data of stored electricity device characteristics parameter and electric equipment; for the parameter that parameter is set module is set; the state indicating module of the temperature information that is used for showing the electric equipment operating state and calculates; be used for providing the alarm module of alarm signal; the voltage monitoring module that is used for controlling the running status control module of electric equipment operation state and is used for monitoring and protecting device operating voltage.
2. a kind of electric equipment protecting means according to claim 1 is characterized in that, described clock module has the multiplex operation power supply, and any time has at least one road power supply to provide working power for it.
3. a kind of electric equipment protecting means according to claim 1 is characterized in that, described data memory module has power down data hold function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320097444 CN203166472U (en) | 2013-03-05 | 2013-03-05 | Electrical equipment protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320097444 CN203166472U (en) | 2013-03-05 | 2013-03-05 | Electrical equipment protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203166472U true CN203166472U (en) | 2013-08-28 |
Family
ID=49027632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320097444 Expired - Fee Related CN203166472U (en) | 2013-03-05 | 2013-03-05 | Electrical equipment protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203166472U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175632A (en) * | 2013-03-05 | 2013-06-26 | 福州大学 | Real-time temperature calculation method and protective device for electrical equipment |
| CN107181234A (en) * | 2017-06-28 | 2017-09-19 | 苏州英克迈信息科技有限公司 | A kind of electric equipment protecting means |
-
2013
- 2013-03-05 CN CN 201320097444 patent/CN203166472U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175632A (en) * | 2013-03-05 | 2013-06-26 | 福州大学 | Real-time temperature calculation method and protective device for electrical equipment |
| CN103175632B (en) * | 2013-03-05 | 2015-09-09 | 福州大学 | Electrical equipment real-time temperature calculation method and protective device |
| CN107181234A (en) * | 2017-06-28 | 2017-09-19 | 苏州英克迈信息科技有限公司 | A kind of electric equipment protecting means |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20160305 |