CN203368153U - Intelligent controller for low voltage circuit breaker - Google Patents
Intelligent controller for low voltage circuit breaker Download PDFInfo
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- CN203368153U CN203368153U CN 201320481347 CN201320481347U CN203368153U CN 203368153 U CN203368153 U CN 203368153U CN 201320481347 CN201320481347 CN 201320481347 CN 201320481347 U CN201320481347 U CN 201320481347U CN 203368153 U CN203368153 U CN 203368153U
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Abstract
The utility model discloses an intelligent controller for a low voltage circuit breaker. The intelligent controller for the low voltage circuit breaker comprises a current sensor, a voltage sensor, a signal conditioning circuit, a microcontroller, a tripping control circuit, and a communication interface circuit; the current sensor and the voltage sensor send collected current and voltage signals to the signal conditioning circuit; the signal conditioning circuit is connected with the microcontroller; the current and voltage signals are filtered and amplified by the signal conditioning circuit and then are transmitted to the microcontroller; the microcontroller is respectively connected with the tripping control circuit and the communication interface circuit; and the communication interface circuit is connected with an upper computer. The intelligent controller for the low voltage circuit breaker simplifies the hardware circuit of a conventional intelligent controller, overcomes the defect that the hardware structure of the intelligent controller used in the conventional circuit breaker is complex, and has the characteristics of simple connection, small volume, easy integration on plate, reliable performance, and stable operation.
Description
Technical field
The utility model relates to the protection apparatus field in low-voltage electrical apparatus, particularly a kind of low-voltage circuit breaker intelligent controller.
Background technology
In recent years, intelligent grid has become study hotspot both domestic and external, and " intellectuality " of low-voltage electrical apparatus and " can communicate by letter " also will be towards the future developments of intelligent grid, and will become the low-voltage customer end industry of intelligent grid.Because the low-voltage customer end of intelligent grid need to have reliably, safety, economy, the characteristics such as efficient; so structure intelligent grid; just must be unable to do without as the intellectuality of the low-voltage distribution system on electrical network basis and low voltage component with can communicate by letter; and wherein play at this core devices of controlling with protective effect; as omnipotent breaker, breaker of plastic casing etc., their intellectuality just becomes the trend of low-voltage electrical apparatus industry development naturally with communicating by letter.And the defect of existing intelligent controller for circuit breakers ubiquity hardware configuration complexity can not meet the demand of low-voltage electrical apparatus industry development.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provide a kind of simple in structure, volume is little, the reliable low-voltage circuit breaker intelligent controller of working stability.
The technical scheme that the utility model addresses the above problem is: a kind of low-voltage circuit breaker intelligent controller, comprise current sensor, voltage sensor, signal conditioning circuit, microcontroller, dropout control circuit and communication interface circuit, described current sensor, voltage sensor is by the electric current collected, voltage signal is delivered to signal conditioning circuit, signal conditioning circuit is connected with microcontroller, by electric current, voltage signal after filtering, send into microcontroller after amplification, described microcontroller respectively with the dropout control circuit, communication interface circuit is connected, described communication interface circuit is connected with host computer.
Described dropout control circuit comprises multiple tube, diode and connector, described multiple tube is comprised of two triodes, wherein the base stage of the first triode is connected with microcontroller, the collector electrode of the first triode is connected with the collector electrode of the second triode, the emitter of the first triode is connected with the base stage of the second triode, the grounded emitter of the second triode, the positive pole of described diode is connected with the collector electrode of the first triode, the negative pole of diode is connected with positive source, and described connector is attempted by the two ends of diode.
The beneficial effects of the utility model are: the utility model has been simplified the hardware circuit of existing intelligent controller, overcome the defect of the hardware configuration complexity of existing intelligent controller for circuit breakers existence, but also have, connect simply, volume is little is easy to the characteristics of integrated on plate, dependable performance, working stability.
The accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Fig. 2 is signal conditioning circuit circuit theory diagrams of the present utility model.
Fig. 3 is dropout control circuit circuit theory diagrams of the present utility model.
Fig. 4 is microcontroller of the present utility model and communication interface circuit circuit theory diagrams.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 1, the utility model comprises current sensor, voltage sensor, signal conditioning circuit, microcontroller, dropout control circuit and communication interface circuit, described current sensor, voltage sensor are delivered to signal conditioning circuit by the electric current, the voltage signal that collect, signal conditioning circuit is connected with microcontroller, described microcontroller is connected with dropout control circuit, communication interface circuit respectively, and described communication interface circuit is connected with host computer.
The utility model utilizes current transformer and voltage transformer to gather respectively current signal and voltage signal in supply line, and by the electric current gathered, voltage signal is sent into signal conditioning circuit, signal conditioning circuit carries out filtering by voltage and current signal, amplify, convert the analog signal that can be processed by microcontroller to after the processing such as passage differentiation and signal trace, utilize the inner integrated ADC of microcontroller P89LPC938 that analog signal conversion is become to digital signal, and it is carried out to logical operation and processing, the digital signal of microcontroller output will send to host computer by the CAN bus, for host computer, the power network signal of slave computer is monitored.Once voltage, current signal exceed predefined value, by slave computer, send trip signal, and release is threaded off.
As shown in Figure 2, described signal conditioning circuit comprises voltage signal conditioning circuit and current signal conditioning circuit, wherein, described voltage signal conditioning circuit comprises resistance R 1, R2, R3, R4 and capacitor C 1, C2, C3, one termination Vin of resistance R 1, capacitor C 1, resistance R 1 other end connecting resistance R2, other end connecting resistance R3, the R4 of resistance R 2, after being connected, the end of the other end of resistance R 4 and capacitor C 2, C3 jointly meets Vout, the other end common ground of capacitor C 1, C2, C3 and resistance R 3, described current signal conditioning circuit comprises resistance R 5, R6, R7, R8 and amplifier U1, U2, one termination Iin of resistance R 5, the other end of resistance R 5 and amplifier U1 3 pin be connected, one end of resistance R 6 and amplifier U1 2 pin be connected, 1 pin of the other end and amplifier U1 is connected, 4 pin of amplifier U1 meet power supply VCC, the 11 pin ground connection of amplifier U1, one end of resistance R 7 is connected with 1 pin of amplifier U1, the other end is connected with 5 pin that meet amplifier U2, one end ground connection of resistance R 8, 6 pin and the resistance R 9 of another termination amplifier U2, 7 pin of the other end of resistance R 9 and amplifier U2 meet Iout jointly.
As shown in Figure 3, described dropout control circuit comprises multiple tube Q1, diode VD1 and connector X1, described multiple tube Q1 is comprised of two triodes, wherein the base stage of the first triode is connected with microcontroller, the collector electrode of the first triode is connected with the collector electrode of the second triode, the emitter of the first triode is connected with the base stage of the second triode, the grounded emitter of the second triode, the positive pole of described diode VD1 is connected with the collector electrode of the first triode, the negative pole of diode VD1 is connected with positive source VCC, described connector X1 is attempted by the two ends of diode VD1.
As shown in Figure 4, described microcontroller circuit comprises single-chip microcomputer U3, crystal oscillator Y1, capacitor C 4, C5.Wherein, single-chip microcomputer U3 preferentially adopts P89LPC938, the end of crystal oscillator Y1 is connected with 19 pin of an end of capacitor C 4 and single-chip microcomputer U3, the other end of crystal oscillator Y1 is connected with an end of capacitor C 5 and 18 pin of single-chip microcomputer U3, the other end common ground of capacitor C 4 and capacitor C 5,12 pin of single-chip microcomputer U3 meet Vout, and 23 pin of single-chip microcomputer U3 meet Iout.
As shown in Figure 4, described communication interface circuit comprises CAN controller U4, CAN transceiver U5, common mode inductance U6, resistance R 10, R11, capacitor C 6, C7, C8, crystal oscillator Y2.Wherein CAN controller U4 preferentially adopts SJA1000, and CAN transceiver U5 preferentially adopts CTM8251, and common mode inductance U6 preferentially adopts B82793.23 pin of CAN controller U4～28 pin, 1 pin, 2 pin are connected with 39 pin of single-chip microcomputer U3～32 pin respectively, 3 pin of CAN controller U4～6 pin, 16 pin, 17 pin respectively with 30 pin of single-chip microcomputer U3, 28 pin, 17 pin, 16 pin, 12 pin, 9 pin are connected, 13 pin of CAN controller U4, 19 pin respectively with 3 pin of CAN transceiver U5, 4 pin are connected, and 14 pin of CAN controller U4 are connected with the end of R10, another termination VCC of R10, the direct ground connection of 20 pin of CAN controller U4,11 pin of CAN controller U4, 22 pin, 18 pin, one end of 12 pin and capacitor C 6 meets VCC jointly, the other end of capacitor C 6 and capacitor C 7, the end of C8, 8 pin of CAN controller U4, 21 pin, 15 pin common grounds, capacitor C 7, the other end of C8 respectively with 9 pin of CAN controller U4, 10 pin are connected, the end of crystal oscillator Y2 is connected with 9 pin of CAN controller U4, the other end is connected with 10 pin of CAN controller U4,1 pin of CAN transceiver U5 meets VCC, the direct ground connection of 2 pin of CAN transceiver U5,6 pin of CAN transceiver U5～7 pin are connected with 1 pin with 3 pin of common mode inductance U6 respectively, 2 pin of a termination common mode inductance U4 of resistance R 11,4 pin of another termination common mode inductance U4,4 pin of common mode inductance U4 are connected with the CAN bus with 2 pin.
Claims (2)
1. a low-voltage circuit breaker intelligent controller, it is characterized in that: comprise current sensor, voltage sensor, signal conditioning circuit, microcontroller, dropout control circuit and communication interface circuit, described current sensor, voltage sensor are delivered to signal conditioning circuit by the electric current, the voltage signal that collect, signal conditioning circuit is connected with microcontroller, by electric current, voltage signal after filtering, send into microcontroller after amplifying, described microcontroller is connected with dropout control circuit, communication interface circuit respectively, and described communication interface circuit is connected with host computer.
2. low-voltage circuit breaker intelligent controller as claimed in claim 1, it is characterized in that: described dropout control circuit comprises multiple tube, diode and connector, described multiple tube is comprised of two triodes, wherein the base stage of the first triode is connected with microcontroller, the collector electrode of the first triode is connected with the collector electrode of the second triode, the emitter of the first triode is connected with the base stage of the second triode, the grounded emitter of the second triode, the positive pole of described diode is connected with the collector electrode of the first triode, the negative pole of diode is connected with positive source, described connector is attempted by the two ends of diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320481347 CN203368153U (en) | 2013-08-08 | 2013-08-08 | Intelligent controller for low voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320481347 CN203368153U (en) | 2013-08-08 | 2013-08-08 | Intelligent controller for low voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203368153U true CN203368153U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320481347 Expired - Fee Related CN203368153U (en) | 2013-08-08 | 2013-08-08 | Intelligent controller for low voltage circuit breaker |
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| Country | Link |
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| CN (1) | CN203368153U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901311A (en) * | 2015-06-16 | 2015-09-09 | 国家电网公司 | Online measuring and controlling device for reducing DC commutation failure risk |
| CN105743217A (en) * | 2015-12-23 | 2016-07-06 | 宁波鹿鼎电子科技有限公司 | Circuit breaker control circuit having multiple use modes |
-
2013
- 2013-08-08 CN CN 201320481347 patent/CN203368153U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901311A (en) * | 2015-06-16 | 2015-09-09 | 国家电网公司 | Online measuring and controlling device for reducing DC commutation failure risk |
| CN104901311B (en) * | 2015-06-16 | 2017-07-14 | 国家电网公司 | It is a kind of to be used to reduce the online monitoring method device of direct-current commutation failure risk |
| CN105743217A (en) * | 2015-12-23 | 2016-07-06 | 宁波鹿鼎电子科技有限公司 | Circuit breaker control circuit having multiple use modes |
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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 |
Granted publication date: 20131225 Termination date: 20140808 |
|
| EXPY | Termination of patent right or utility model |