CN205901261U - Circuit breaker control device - Google Patents
Circuit breaker control device Download PDFInfo
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- CN205901261U CN205901261U CN201620868982.0U CN201620868982U CN205901261U CN 205901261 U CN205901261 U CN 205901261U CN 201620868982 U CN201620868982 U CN 201620868982U CN 205901261 U CN205901261 U CN 205901261U
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- voltage
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- microcontroller
- circuit breaker
- control device
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Abstract
The utility model discloses a circuit breaker control device, including bleeder circuit, microcontroller and drive circuit, bleeder circuit connects the work electric wire netting, and the grid voltage that will work carries out the partial pressure to input microcontroller's input, whether microcontroller is used for sampling and handling the voltage from input, calculates voltage peak, voltage virtual value and cycle time value according to sample data, then meet the requirements according to preset parameter judgement work grid voltage, if be not conform to the requirement then export open circuit's control signal, if meet the requirements then export closed circuit's control signal, drive circuit links to each other with microcontroller's output and trip gear for open circuit or closed circuit's control signal drive trip gear disconnection or closed electrical equipment's supply circuit according to microcontroller output. This device is compared with having the electron circuit breaker now, has the characteristics that precision height, sensitivity are high, the reliability is high, the flexibility is high and the maintenance cost is low.
Description
Technical field
The utility model is related to electrical equipment, particularly to a kind of control device of circuit breaker.
Background technology
Electrical equipment has a specified operating voltage range, but due to a variety of causes, particularly in rural area, electricity
Net voltage is simultaneously unstable, can cause device of overheating of electrical when the maximum operating voltage that line voltage is higher than electrical equipment, seriously
When also can burn electrical equipment, can cause the electrical equipment cannot be just when line voltage is less than the minimum operating voltage of electrical equipment
Often work, electrical equipment is caused damage, the service life of impact electrical equipment.
In order to solve the above problems, prior art is typically protected to electrical equipment by installing electronic circuit breaker,
The circuit part of electronic circuit breaker is typically by sample circuit, buffer circuit, overvoltage compares, under-voltage compares, delay circuit etc.
Major part is constituted, and completes to compare by operational amplifier, comparator chip and trigger chip etc., time delay and control logic work(
Energy.When line voltage is higher than the HVT high voltage threshold that electronic circuit breaker sets or the low pressure threshold being less than electronic circuit breaker setting, electricity
Sub- breaker can cut off the power supply circuits of electrical equipment, and electrical equipment is protected.
Although electronic circuit breaker can carry out overvoltage and under-voltage protection to electrical equipment, there is also following shortcoming:
Component quantity is many, leads to required material and assembly cost high, and greatly, reliability reduces equipment volume simultaneously；
Circuit grade is many, leads to the circuit of each rank all can introduce error due to component parameter error, and multi-level circuit adds up
Global error is larger afterwards, up to more than 5% it is difficult to accomplish high accuracy；Configuration parameter is fixed, detection threshold in its configuration parameter,
Return difference, time delay, response time etc. are fixing, are determined by circuit parameter, if necessary to change adjustment, then need to remodify electricity
Road is simultaneously re-scaled；Voltage waveform is required, if grid voltage waveform has certain distortion on sinusoidal base,
Its testing circuit can produce error.
Content of the invention
The purpose of this utility model is to provide a kind of control device of circuit breaker, to make up the deficiency of above-mentioned electronic circuit breaker.
To achieve these goals, technical solutions of the utility model are as follows:
A kind of control device of circuit breaker, for driving trip gear to be opened or closed the power supply circuits of electrical equipment, described
Control device of circuit breaker includes bleeder circuit, microcontroller and drive circuit, wherein:
Described bleeder circuit connection work electrical network, work line voltage is carried out partial pressure, obtains reducing in the ratio setting
Voltage afterwards, and it is input to the input of microcontroller；
Described microcontroller is used for the voltage inputting from input being sampled and processing, and is calculated according to sampled data
According to preset parameter, voltage peak, voltage effective value and period time value, then judge whether work line voltage meets the requirements,
If undesirable, the control signal of output disconnecting circuit, if met the requirements, the control signal of output closed circuit；
Described drive circuit is connected with the output end of microcontroller and trip gear, disconnected for exported according to microcontroller
The control signal of open circuit or closed circuit drives trip gear to be opened or closed the power supply circuits of electrical equipment.
Further, described bleeder circuit includes the first divider resistance r1 and the second divider resistance r2, the first divider resistance
R1 is connected with work electrical network, the second divider resistance r2 ground connection, tie point between the first divider resistance r1 and the second divider resistance r2
Connect the input of microcontroller.
Further, described microcontroller includes sampling unit, memory cell and control unit.
Described sampling unit is sampled to the voltage inputting from input according to default sample frequency, and carries out modulus
Conversion, the analog voltage collecting is converted into digital sampled signal, is then saved in digital sampled signal by sampling order
In memory cell.
Described memory cell is used for storing digital sampled signal and preset parameter.
Described control unit according to digital sampled signal calculate the voltage peak of work each wave period of line voltage,
According to preset parameter, voltage effective value and period time value, then judge whether work line voltage meets the requirements, if be not inconsistent
Close the control signal of the power supply circuits requiring then output to disconnect electrical equipment, if met the requirements, output close equipment
The control signal of power supply circuits.
Further, described microcontroller also includes communication unit, and described communication unit is used for receiving preset parameter, will be pre-
Put parameter to preserve in the memory unit.
Further, described communication unit is additionally operable to be communicated with external calibration equipment, obtains calibration voltage value and school
Paracycle, time value, the calibration voltage getting value and calibration cycle time value were sent to control unit, described control unit
Realized to the voltage detecting precision of whole control device of circuit breaker according to the calibration voltage value obtaining and calibration cycle time value and
The digital calibration of cycle detection precision.
Further, described preset parameter includes: overvoltage/brownout threshold, cycle time threshold value, detection waveform quantity, dynamic
Delay time after delay time before work, action.
Further, described drive circuit includes current-limiting resistance r3 and drives triode q1, and the one of described current-limiting resistance r3
End is connected with the output end of microcontroller 2, and the other end connects the base stage of described driving triode q1, for exporting to microcontroller
Control signal carry out current limliting, the colelctor electrode of described driving triode q1 is connected with trip gear, emitter stage connect ground, for root
According to the control signal of microcontroller output, trip gear is driven to be opened or closed the power supply circuits of electrical equipment.
The utility model proposes a kind of control device of circuit breaker, by work line voltage is sampled and is processed,
And judge whether work line voltage meets the requirements according to preset parameter, disconnecting circuit or closed circuit are exported according to judged result
Control signal, drive trip gear to be opened or closed the power supply circuits of electrical equipment, to reach the purpose of protection electrical equipment.
The utility model can carry out preset parameter setting according to the different demands of user it is possible to be detected by external calibration equipment
Precision is calibrated.The utility model processes what existing electronic circuit breaker was completed by a large amount of components and parts and chip by microcontroller
The functions such as data acquisition, noise jamming filtration, logic judgment, delay process, compared with existing electronic circuit breaker, have detection essence
Spend and sensitivity is high, system reliability is high, using the low feature of flexible and maintenance cost.
Brief description
Fig. 1 is the structural representation of the utility model control device of circuit breaker.
Specific embodiment
With reference to the accompanying drawings and examples technical solutions of the utility model are described in further details, following examples are not
Constitute to restriction of the present utility model.
As shown in figure 1, a kind of control device of circuit breaker of the utility model, including bleeder circuit 1, microcontroller 2 and drive
Dynamic circuit 3.The line voltage that works is carried out by partial pressure by bleeder circuit 1, line voltage is reduced to the sampling electricity of microcontroller 2
After pressure scope, the input 21 of input microcontroller 2, microcontroller 2 is sampled to the voltage of input, obtains work electrical network electricity
The sampled data of pressure, calculates peak value, virtual value and the cycle of voltage according to sampled data, then judges to work as according to preset parameter
Whether front work line voltage meets the requirements, and is opened or closed the control of the power supply circuits of electrical equipment according to judged result output
Signal processed, drives trip gear to be opened or closed the power supply circuits of electrical equipment by drive circuit, electrical equipment is protected
Shield.
Bleeder circuit 1 of the present utility model includes divider resistance r1 and r2, and divider resistance r1 connects work electrical network, partial pressure electricity
Resistance r2 ground connection, the sampled voltage according to microcontroller 2 requires resistance r1 and r2 from different resistance values, and line voltage is through undue
After volt circuit partial pressure, obtain the low-voltage that line voltage reduces by a certain percentage, by the connection between divider resistance r1 and r2
This low-voltage is input to microcontroller 2 and is sampled by point.The utility model is input to the low-voltage of the input of microcontroller 2
The ratio accounting for line voltage is determined by the resistance value of divider resistance r1 and r2, this ratio is r1/ (r1+r2), the utility model root
Sampled voltage scope according to microcontroller 2 selects resistance r1 and r2 of different resistance values.
The utility model microcontroller 2 includes sampling unit, communication unit, memory cell and control unit.Wherein, sample
Unit is sampled to the voltage being input to microcontroller 2 according to predetermined sample frequency, and carries out mould to each sampled voltage
Number conversion, the analog voltage collecting is converted into digital sampled signal, then digital sampled signal is pressed sampling order and preserves
In the memory cell of microcontroller 2.In order to ensure sampling precision, the sampling of the sampling unit of the utility model microcontroller 2
Frequency 1khz at least to be reached, general recommendations is 10khz.Because the positive and negative half cycle of alternating current is symmetrical, so being sampled
When, can only the positive half cycle of alternating current be processed, to simplify handling process and to reduce operand.The utility model sampling is single
Unit, when voltage is detected by bearing positive zero crossing, judges that the positive half cycle of new starts, and starts with default sampling frequency
Rate carries out to input voltage sampling, analog-to-digital conversion and storage；When detect voltage by just to negative zero crossing when it is believed that
Complete the sampling of the positive half cycle waveform complete to, stop being sampled, until next positive half cycle starts.
The communication unit of the utility model microcontroller 2 receives preset parameter by communication interface, and pre- by receive
Put parameter to preserve in the memory unit.Preset parameter of the present utility model includes: overvoltage/brownout threshold, cycle time threshold value, inspection
Survey waveform quantity, delay time before action, delay time after action, the utility model can be arranged according to the different demands of user
Different preset parameter values.Communication unit is additionally operable to be communicated with calibrator (-ter) unit by communication interface, obtains calibrator (-ter) unit
Calibration voltage value and calibration cycle time value, and calibration magnitude of voltage and calibration cycle time value are sent to control unit, pass through
Control unit is realized to the voltage detecting precision of whole control device of circuit breaker and the digital calibration of cycle detection precision.Specifically
Ground, external detection equipment exports the high alternating current of a precision, is input to the input of microcontroller 2 by bleeder circuit,
And the calibration voltage value of the alternating current of output and calibration cycle time value are sent to communication by the communication interface of microcontroller 2
Unit, communication unit is sent to control unit by calibrating magnitude of voltage and calibration cycle time value, the sampling unit of microcontroller 2 and
Control unit is sampled to this alternating current and is processed, and calculates magnitude of voltage and the period time value of this alternating current, and with calibrating
Magnitude of voltage and calibration cycle time value are compared with the magnitude of voltage calculating and period time value, according to comparison result to voltage
Accuracy of detection and cycle detection precision are calibrated.
It should be noted that accuracy of detection of the present utility model is in the situation not using external calibration equipment to be calibrated
Under, determined by the precision of divider resistance r1, r2 and the voltage-reference of microcontroller completely.The electricity of microcontroller
The precision of pressure a reference source is different according to the model selected, typically 0.5%～1% about, if entered using external calibration equipment
Row calibration, its accuracy of detection is up to 0.1%.
The memory cell of the utility model microcontroller 2 is used for storing the digital sampled signal of sampling unit generation and leads to
The preset parameter that letter unit gets.
The control unit of the utility model microcontroller 2 according to digital sampled signal, calculate work line voltage each
According to preset parameter, the voltage peak of wave period, mean value and period time value, judge whether work line voltage conforms to
Ask, and be opened or closed the control signal of circuit according to judged result output.Specifically, control unit is first according to alternating current
Sine waveform feature, filters out the digital sampled signal being distorted because being interfered；Then according to predetermined software algorithm,
Calculate voltage peak, voltage effective value and the period time value of each wave period of line voltage；Take out from memory cell
Preset parameter, is compared with the voltage effective value of the overvoltage/brownout threshold in preset parameter and each wave period, if electric
It is pressed with valid value and is more than overvoltage threshold, then judge that overvoltage in the line voltage of this wave period, if voltage effective value is less than owed
Pressure threshold value, then judge that the line voltage of this wave period occurs under-voltage；It is more than in advance when over-pressed or under-voltage wave period number occurs
When putting the detection waveform quantity in parameter, according to delay time before the action in preset parameter, output after entering line delay disconnects electricity
The control signal on road.
The utility model control unit output disconnecting circuit control signal after, if detected in follow-up detection
Line voltage is normal, and when normal voltage waveform periodicity is more than the detection waveform quantity in preset parameter, control unit
According to delay time after the action in preset parameter, after entering line delay, export the control signal of closed circuit.
It should be noted that the utility model control unit can also be with the voltage peak that calculates and preset parameter
Overvoltage/brownout threshold is compared, and judges whether line voltage occurs over-pressed or under-voltage；Or according to the cycle time calculating
Value is compared with the cycle time threshold value in preset parameter, judges whether line voltage meets the requirements.Difference according to user
The different strategy of demand setting, the control signal of output disconnecting circuit or closed circuit, the electrical equipment of user is protected.
The utility model drive circuit 3 include current-limiting resistance r3 and drive triode q1, one end of current-limiting resistance r3 with micro-
The output end of controller 2 connects, and the other end connects the base stage driving triode q1, and the control signal of microcontroller 2 output is entered
Row current limliting, drives the colelctor electrode of triode q1 to be connected with trip gear, grounded emitter, when microcontroller 2 output disconnects electricity
During the control signal on road, drive triode q1 in the conduction state, drive trip gear to disconnect the power supply circuits of electrical equipment, when
When microcontroller 2 exports the control signal of closed circuit, drive triode q1 to be in nonconducting state, drive trip gear closure
The power supply circuits of electrical equipment.
Above example only in order to the technical solution of the utility model to be described rather than be limited, without departing substantially from this reality
In the case of new spirit and its essence, those of ordinary skill in the art are various corresponding when being made according to the utility model
Change and deformation, but these corresponding change and deformation all should belong to the protection model of the claim appended by the utility model
Enclose.
Claims (7)
1. a kind of control device of circuit breaker, for driving trip gear to be opened or closed the power supply circuits of electrical equipment, its feature
It is, described control device of circuit breaker includes bleeder circuit (1), microcontroller (2) and drive circuit (3), wherein:
Described bleeder circuit (1) connects work electrical network, and work line voltage is carried out partial pressure, after obtaining reducing in the ratio setting
Voltage, and be input to the input (21) of microcontroller (2)；
Described microcontroller (2) is used for the voltage inputting from input (21) being sampled and processing, according to sampled data meter
Calculate voltage peak, voltage effective value and period time value, then judge whether work line voltage meets according to preset parameter
Require, if undesirable, the control signal of output disconnecting circuit, if met the requirements, the control of output closed circuit
Signal；
Described drive circuit (3) is connected with the output end of microcontroller (2) and trip gear, for defeated according to microcontroller (2)
The disconnecting circuit going out or the control signal of closed circuit drive trip gear to be opened or closed the power supply circuits of electrical equipment.
2. control device of circuit breaker according to claim 1 is it is characterised in that described bleeder circuit (1) includes first point
Piezoresistance (r1) and the second divider resistance (r2), the first divider resistance (r1) is connected with work electrical network, the second divider resistance (r2)
Ground connection, between the first divider resistance (r1) and the second divider resistance (r2), tie point is connected the input (21) of microcontroller (2).
3. control device of circuit breaker according to claim 1 is it is characterised in that described microcontroller (2) includes sampling list
Unit, memory cell and control unit；
Described sampling unit is sampled to the voltage inputting from input (21) according to default sample frequency, and carries out modulus
Conversion, the analog voltage collecting is converted into digital sampled signal, is then saved in digital sampled signal by sampling order
In memory cell；
Described memory cell is used for storing digital sampled signal and preset parameter；
Described control unit calculates the voltage peak of work each wave period of line voltage, voltage according to digital sampled signal
According to preset parameter, virtual value and period time value, then judge whether work line voltage meets the requirements, if do not meet will
Then output is asked to disconnect the control signal of the power supply circuits of electrical equipment, if met the requirements, the power supply of output close equipment
The control signal of circuit.
4. control device of circuit breaker according to claim 3 is it is characterised in that described microcontroller (2) also includes communicating
Unit, described communication unit is used for receiving preset parameter, and preset parameter is preserved in the memory unit.
5. control device of circuit breaker according to claim 4 is it is characterised in that described communication unit is additionally operable to and outside school
Quasi- equipment is communicated, and obtains calibration voltage value and calibration cycle time value, by the calibration voltage getting value and calibration cycle
Time value is sent to control unit, and described control unit is realized to whole according to the calibration voltage value obtaining and calibration cycle time value
The voltage detecting precision of individual control device of circuit breaker and the digital calibration of cycle detection precision.
6. control device of circuit breaker according to claim 1 is it is characterised in that described preset parameter includes: overvoltage/under-voltage
Threshold value, cycle time threshold value, detection waveform quantity, delay time before action, delay time after action.
7. control device of circuit breaker according to claim 1 is it is characterised in that described drive circuit (3) includes current limliting electricity
Resistance (r3) and driving triode (q1), one end of described current-limiting resistance (r3) is connected with the output end of microcontroller (2), the other end
Connect the described base stage driving triode (q1), the control signal for exporting to microcontroller (2) carries out current limliting, described driving
The colelctor electrode of triode (q1) is connected with trip gear, and emitter stage connects ground, for the control letter being exported according to microcontroller (2)
Number, drive trip gear to be opened or closed the power supply circuits of electrical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620868982.0U CN205901261U (en) | 2016-08-11 | 2016-08-11 | Circuit breaker control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620868982.0U CN205901261U (en) | 2016-08-11 | 2016-08-11 | Circuit breaker control device |
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| Publication Number | Publication Date |
|---|---|
| CN205901261U true CN205901261U (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620868982.0U Active CN205901261U (en) | 2016-08-11 | 2016-08-11 | Circuit breaker control device |
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| CN (1) | CN205901261U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769154A (en) * | 2017-12-05 | 2018-03-06 | 深圳市共进电子股份有限公司 | Method of undervoltage protection, device, video camera and the storage medium of web camera |
| CN114035122A (en) * | 2021-11-08 | 2022-02-11 | 浙江中群智能设备制造有限公司 | Method for numbering connection of circuit breakers in distribution box |
-
2016
- 2016-08-11 CN CN201620868982.0U patent/CN205901261U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769154A (en) * | 2017-12-05 | 2018-03-06 | 深圳市共进电子股份有限公司 | Method of undervoltage protection, device, video camera and the storage medium of web camera |
| CN107769154B (en) * | 2017-12-05 | 2019-09-17 | 深圳市共进电子股份有限公司 | Method of undervoltage protection, device, video camera and the storage medium of web camera |
| CN114035122A (en) * | 2021-11-08 | 2022-02-11 | 浙江中群智能设备制造有限公司 | Method for numbering connection of circuit breakers in distribution box |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |