CN203631108U - Three-phase power factor display circuit of intelligent low voltage reactive power compensator - Google Patents
Three-phase power factor display circuit of intelligent low voltage reactive power compensator Download PDFInfo
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- CN203631108U CN203631108U CN201320766490.7U CN201320766490U CN203631108U CN 203631108 U CN203631108 U CN 203631108U CN 201320766490 U CN201320766490 U CN 201320766490U CN 203631108 U CN203631108 U CN 203631108U
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Abstract
A three-phase power factor display circuit of an intelligent low voltage reactive power compensator is composed of 9 LED nixie tube displays, three programmable parallel interface circuits 8255A, and a plurality of pull-up resistors. An A-phase power display circuit is composed of a 8255A chip and three nixie tube displays, a B-phase power display circuit is composed of a 8255A chip and three nixie tube displays, and a C-phase power display circuit is composed of a 8255A chip and three nixie tube displays. All the pull-up resistors are 10 kilo-ohm resistors, and the nixie tubes are based on eight sections of common anode nixie tube displays. The three-phase power factor display circuit of the intelligent low voltage reactive power compensator of the utility model is rapid in response, simple in structure and stable in work.
Description
Technical field
The three-phase activity coefficient display circuit of a kind of intelligent low-pressure reactive power compensator of the utility model, the utility model is mainly that the utility model belongs to low-voltage intelligent power grid control field for intelligent low-pressure reactive power compensator provides a kind of three-phase activity coefficient display circuit.
Background technology
Most electric equipments of low-voltage distribution system are inductive load, cause current phase to lag behind voltage-phase, power consumption is on electrical network transmission line, grid supply quality is declined, for this reason, must take corresponding indemnifying measure, as the reactive power compensator designing according to the method to electrical network switching capacitance, at present, in low-voltage distribution system, the major defect of conventional reactive power compensator is: volume is large, sampling precision is not high, do not consider low-voltage load three-phase imbalance factor, three-phase is switching simultaneously, switched capacitor progression is few, antijamming capability and poor reliability etc., thereby often cause over-compensation or the under-compensation of electrical network.The utility model inactivity compensation device system is mainly the high precision low pressure reactive power compensator of controlling based on AT89C52, can overcome above shortcoming, have to electrical network impact little, response is fast, antijamming capability is strong, precision is high, can phase-splitting switching etc. advantage.
Utility model content
The technical problems to be solved in the utility model is: design a kind of three-phase activity coefficient display circuit for low-voltage intelligent power network reactive power compensation device circuit, this display circuit is simple in structure, and response is fast.
The technical solution of the utility model is:
A kind of three-phase activity coefficient display circuit of intelligent low-pressure reactive power compensator is mainly made up of 9 LED charactron displays, 3 programmable parallel interface 8255A and several pull-up resistors;
Described A phase power display circuit is made up of 1 8255A chip and 3 digital tube displays;
Described B phase power display circuit is made up of 1 8255A chip and 3 digital tube displays;
Described C phase power display circuit is made up of 1 8255A chip and 3 digital tube displays;
Described pull-up resistor all adopts 10K Ω resistance;
Described charactron adopts 8 sections of common anode number of poles code tube displays.
Each interface of described charactron display connects 8255A interface circuit by pull-up resistor, by the control of 8255A programmable interface circuit, and described 8255A interface circuit input control termination single chip computer AT 89C52, by single chip computer AT, 89C52 controls.
The beneficial effects of the utility model are: design a kind of three-phase activity coefficient display circuit for low-voltage intelligent power network reactive power compensation device circuit, fast, simple in structure, the working stability of this display circuit response.
Accompanying drawing explanation
Fig. 1 is the A phase hardware configuration schematic diagram of the three-phase activity coefficient display circuit of a kind of intelligent low-pressure reactive power compensator of the utility model
Embodiment
Below in conjunction with accompanying drawing 1, embodiment of the present utility model is described:
If Fig. 1 is A phase power factor display circuit, described B phase and the same Fig. 1 of C circuitry phase: the utility model three-phase activity coefficient display circuit is mainly made up of 9 light-emitting diode displays, three 8255A control chips, be used for showing the power factor of each phase, light-emitting diode display work is in static display mode, everybody common anode utmost point links together and connect+5V, and the section code (a～dp) of every is connected with A, B, the C mouth of 8255A respectively.Everybody can independently show this circuit, as long as keep segment encode level on this segment encode line line, this position just can keep showing accordingly character; Three-phase activity coefficient display circuit is made up of three 8255 and nine common anode LED charactrons, is used for showing each phase power factor, and the size of several pull-up resistors, is all rule of thumb, adopts the resistance of 10k Ω.For simplicity's sake, Fig. 3-22 draw A phase power factor display circuit.The 8255th, a kind of parallel interface of general programmable, it has three 8 bit parallel mouth PA, PB, PC.The software set of display circuit 8255A is 0 working method, and wherein PA mouth shows that zero, PB mouth shows after decimal first, and PC mouth shows second after decimal, and power factor display precision is 0.01.The demonstration of A phase, B phase, C phase power factor is controlled by P2.5, P2.6, the P2.7 of AT89C52 respectively
Conventional light-emitting diode display be 8 sections (or 7 sections, 8 sections than more than 7 sections 1 radix point " dp " section).1 light emitting diode of each section of correspondence.This display has 2 kinds of common anode level and common cathodes.As shown in Fig. 3-19.The negative electrode of the light emitting diode of common cathode light-emitting diode display links together, conventionally this common cathode ground connection.When the anode of certain light emitting diode is high level, light emitting diode is lighted, and corresponding section is shown.Equally, together, this public anode connects positive voltage to the anodic bonding of the light emitting diode of common anode utmost point light-emitting diode display conventionally, and in the time that the negative electrode of certain light emitting diode connects low level, light emitting diode is lit, and corresponding section is shown.
Each interface of described charactron display connects 8255A interface circuit by pull-up resistor, and by the control of 8255A programmable interface circuit, and described 8255A interface circuit input control termination single chip computer AT 89C52 is controlled by single chip computer AT 89C52; Described A phase, B phase, C phase power display circuit are made up of 1 8255A interface circuit and 3 digital tube displays; Described pull-up resistor all adopts 10K Ω resistance.
The above; only the embodiment of the utility model method; not the utility model is imposed any restrictions, the variation of every any simple modification of above embodiment being done according to technical solutions of the utility model, structure replaces and all still belonging in the protection domain of the utility model technological system.
Claims (2)
1. a three-phase activity coefficient display circuit for intelligent low-pressure reactive power compensator, is characterized in that: be made up of 9 LED charactron displays, 3 programmable parallel interface 8255A and several pull-up resistors;
Described A phase power display circuit is made up of 1 8255A chip and 3 digital tube displays;
Described B phase power display circuit is made up of 1 8255A chip and 3 digital tube displays;
Described C phase power display circuit is made up of 1 8255A chip and 3 digital tube displays;
Described pull-up resistor all adopts 10K Ω resistance;
Described charactron adopts 8 sections of common anode number of poles code tube displays.
2. the three-phase activity coefficient display circuit of a kind of intelligent low-pressure reactive power compensator according to claim 1, it is characterized in that: each interface of described charactron display connects 8255A interface circuit by pull-up resistor, by the control of 8255A programmable interface circuit, and described 8255A interface circuit input control termination single chip computer AT 89C52, by single chip computer AT, 89C52 controls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320766490.7U CN203631108U (en) | 2013-11-26 | 2013-11-26 | Three-phase power factor display circuit of intelligent low voltage reactive power compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320766490.7U CN203631108U (en) | 2013-11-26 | 2013-11-26 | Three-phase power factor display circuit of intelligent low voltage reactive power compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203631108U true CN203631108U (en) | 2014-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320766490.7U Expired - Fee Related CN203631108U (en) | 2013-11-26 | 2013-11-26 | Three-phase power factor display circuit of intelligent low voltage reactive power compensator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203631108U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405378A (en) * | 2015-12-03 | 2016-03-16 | 浙江宇视科技有限公司 | Nixie tube driving device and display equipment |
-
2013
- 2013-11-26 CN CN201320766490.7U patent/CN203631108U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405378A (en) * | 2015-12-03 | 2016-03-16 | 浙江宇视科技有限公司 | Nixie tube driving device and display equipment |
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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: 20140604 Termination date: 20141126 |
|
| EXPY | Termination of patent right or utility model |