CN204614731U

CN204614731U - A kind of three-phase intelligent Miniature magnetic keeps circuit breaker

Info

Publication number: CN204614731U
Application number: CN201520322154.2U
Authority: CN
Inventors: 王再尚; 李爽; 国帅
Original assignee: HAIERBIN ELECTRIC INSTRUMENT INSTITUTE
Current assignee: HAIERBIN ELECTRIC INSTRUMENT INSTITUTE
Priority date: 2015-05-19
Filing date: 2015-05-19
Publication date: 2015-09-02
Anticipated expiration: 2025-05-19

Abstract

A kind of three-phase intelligent Miniature magnetic keeps circuit breaker, and it relates to a kind of intelligent micro magnetic retentive control circuit breaker of power electronic equipment device.After adopting advanced singlechip chip to design, make full use of modern science and technology, monitor and forecast is carried out to power electronic equipment, when detecting that electric current is excessive, control relay disconnects automatically, utilize RS485 interface state information, read electric flux and on off state, and according to circumstances control switch.It comprises input/output switching circuit, ic for energy metering, MCU control circuit, telecommunication circuit and electric power management circuit, under the burning voltage that described three-phase intelligent Miniature magnetic keeps circuit breaker to supply at electric power management circuit, according to the signal that ic for energy metering receives, its MCU control circuit reads electric flux and on off state, and the size detecting electric current carrys out control switch, carry out long-range RS485 communication by RS485 bus and send order, control magnetic latching relay switch, realize Long-distance Control.

Description

A kind of three-phase intelligent Miniature magnetic keeps circuit breaker

Technical field

The utility model relates to a kind of power electronic equipment device, particularly a kind of intelligent micro magnetic retentive control circuit breaker.

Background technology

A kind of three-phase intelligent Miniature magnetic keeps circuit breaker to be the automatic switch element with isolation features, can be widely used in remote control, remote measurement, communication, automatically control, electromechanical integration and power electronic equipment, be one of most important control element, there is good development prospect.A kind of three-phase intelligent Miniature magnetic keeps circuit breaker to be a kind of intelligentized equipment, after designing by adopting advanced singlechip chip, make full use of modern science and technology, monitor and forecast is carried out to power electronic equipment, when can detect that electric current is excessive, control relay disconnects automatically, the order that can send according to host computer, reads electric flux and on off state, and according to circumstances control switch.

Summary of the invention

The utility model is to overcome the deficiencies in the prior art part, adapt to current in power electronic equipment device, after adopting advanced singlechip chip to design, make full use of modern science and technology, carry out monitor and forecast to power electronic equipment, when can detect that electric current is excessive, control relay disconnects automatically, utilizes RS485 interface state information, read electric flux and on off state, and according to circumstances control switch.

The utility model is achieved by following scheme:

A kind of three-phase intelligent Miniature magnetic keeps circuit breaker, it comprises input/output switching circuit, ic for energy metering, MCU control circuit, telecommunication circuit and electric power management circuit, under the burning voltage that described three-phase intelligent Miniature magnetic keeps circuit breaker to supply at electric power management circuit, according to the signal that ic for energy metering receives, its MCU control circuit reads electric flux and on off state, and carry out control switch by the size detecting electric current, carry out long-range RS485 communication by RS485 bus and send order, control magnetic latching relay switch, realize Long-distance Control.

Described input/output switching circuit comprises No. three relay circuits and three road relay drive circuits, and the electric current that single-chip microcomputer exports is increased to the electric current that can drive relay by drive circuit, realizes the folding of control relay.

Wherein said ic for energy metering comprises current sampling circuit, voltage sampling circuit and electric energy computation chip circuit, current sampling circuit completes the sampling of current signal by current transformer, voltage sampling circuit completes the sampling of voltage signal by electric resistance partial pressure, and electric energy computation chip completes the processing capacity that intelligent micro magnetic keeps the various electric power signal of circuit breaker.

Wherein said MCU control circuit is made up of PIC18F26K22 master chip and peripheral circuit, completes the various controlling functions that intelligent micro magnetic keeps circuit breaker.

Wherein said telecommunication circuit is that one utilizes RS485 interface to access signal, and utilize 485 buses to carry out RS485 communication, carry out communicating according to RS485 communication protocol, 485 telecommunication circuits are made up of 485 bus driving circuits, protective circuit and photoelectric isolating circuit.

Electric power management circuit comprises 12V power supply and two-way 5V power circuit, and three-phase voltage signal generates the 12V voltage of big current after power transformer and current bridge type rectification, for relay work; 5V voltage is generated, for MCU circuit work power after 12V voltage; Three phase mains transformer also can generate 5V voltage, for isolation voltage after current bridge type rectification.

Compared with prior art, after the invention has the beneficial effects as follows that a kind of three-phase intelligent Miniature magnetic keeps circuit breaker to be designed by the singlechip chip that employing is advanced, make full use of modern science and technology, monitor and forecast is carried out to power electronic equipment, when can detect that electric current is excessive, relay disconnects automatically, and the order that can send according to host computer, reads electric flux and on off state, and pass through the Push And Release of RS485 Control on Communication circuit breaker, be a kind of intelligentized equipment.

Accompanying drawing explanation

Fig. 1 is that three-phase intelligent Miniature magnetic of the present utility model keeps circuit breaker theory diagram; Fig. 2 is input/output switching schematic block circuit diagram; Fig. 3 is input/output switching circuit theory diagrams; Fig. 4 is ic for energy metering theory diagram: Fig. 5-Fig. 7 is ic for energy metering schematic diagram, and wherein Fig. 5 is current sampling circuit schematic diagram; Fig. 6 is voltage sampling circuit schematic diagram; Fig. 7 is electric energy computation chip schematic diagram; Fig. 8 is the MCU control circuit theory diagram that three-phase intelligent Miniature magnetic keeps circuit breaker; Fig. 9 is the MCU control circuit schematic diagram that three-phase intelligent Miniature magnetic keeps circuit breaker; Figure 10 is 485 bus communication distribution maps; Figure 11 is RS485 telecommunication circuit schematic diagram; Figure 12 is electric power management circuit theory diagram; Figure 13 is electric power management circuit schematic diagram.

Embodiment

As shown in Figure 1, a kind of three-phase intelligent Miniature magnetic described in this embodiment keeps circuit breaker to comprise input/output switching circuit, ic for energy metering, MCU control circuit, telecommunication circuit and electric power management circuit, described input/output switching circuit comprises No. three relay circuits and three road relay drive circuits, input/output switching circuit accesses the signal of telecommunication by binding post, its theory diagram is as Fig. 2, the current signal that single-chip microcomputer exports is amplified to the electric current that can drive relay by drive circuit, realize the folding of control relay, A, B.C tri-tunnel is identical, relay is directly exported by binding post, every road relay drive circuit meets RA0 and RA1 of MCU chip RA mouth, A, B, C No. tri-relay is controlled by RA mouth, No. three relays are opened and conjunction together, every road relay drive circuit basic circuit diagram is as 3.

Wherein said ic for energy metering comprises current sampling circuit, voltage sampling circuit and electric energy computation chip circuit, complete the processing capacity that intelligent micro magnetic keeps the various electric power signal of circuit breaker, ic for energy metering accesses voltage signal by binding post, voltage sampling circuit completes the sampling of voltage signal by electric resistance partial pressure, current sampling circuit completes the sampling of current signal by current transformer access electric current, the sampling voltage of voltage and current connects three-phase electrical energy computation chip process, electric energy computation chip completes electric energy metrical function, its theory diagram is as Fig. 4, every phase current accesses current signal through current transformer, current transformer primary and secondary current ratio is 50A:10MA, secondary transformer connects 1.2K divider resistance after connecing 10 ohm of sample resistances, finally connect three phase metering chip input, A, B, C tri-phase connection is identical, basic circuit diagram is as Fig. 5, every phase voltage sampling accesses a 540K/1W resistance after accessing voltage by terminal, connect two 1.2K electric resistance partial pressures again, REFOUT connects computation chip, VXP finally connects three phase metering chip input, A, B, C tri-phase connection is identical, basic circuit diagram is as Fig. 6, voltage and current signal meets three phase metering chip ATT7022B, ATT7022B electrify restoration circuit selects resistance 100K, the rc reset circuit of electric capacity 0.1U, can when powering on reliable reset, make ATT7022B working properly, crystal oscillating circuit selects two 15PF electric capacity and 24.576MHZ crystal oscillator, composition crystal oscillating circuit, high-precision frequency is provided to ATT7022B, ATT7022B operating voltage is 5V, with the filter capacitor of indirect 0.1U and 0.01U on ground, ATT7022B works in SPI mode, DIN, DOUT, SCLK, CS, meet the RB3-RB0 of the RB mouth of MCU chip respectively, can to voltage, electric current, the data processings such as electric energy, CF1 is that meritorious pulse exports, calibrate before dispatching from the factory, basic circuit diagram is as Fig. 7.

Wherein said MCU control circuit is made up of master chip and peripheral circuit, master chip selects the low-power consumption of Microchip company, high speed microprocessor controller PIC18F26K22, peripheral circuit comprises electrify restoration circuit, at line writing control circuit, data storage circuitry, the interface circuit of input/output switching circuit, the interface circuit of ic for energy metering, 485 telecommunication circuits and power supply circuit, jointly complete the various functions that intelligent micro magnetic keeps circuit breaker, MCU control circuit theory diagram is as Fig. 8, MCU control circuit schematic diagram is as Fig. 9, master chip selects PIC18F26K22, it has three I/O mouths, wherein power supply circuit provides the voltage of 5V and 12V needed for whole circuit working.Electrify restoration circuit selects resistance 100K, the rc reset circuit of electric capacity 0.1U, can when powering on reliable reset, make MCU control circuit working properly; Be meet PGC by RB6 at line writing control circuit, RB7 meets PGD, and PGC, PGD, MCLR, VCC and GND form, and completes program on-line debugging and can in line writing program; Data storage circuitry is that the RC mouth of master chip PIC18F26K22 is connected to pin-saving chip AT24C02 as independently I/O mouth, RC2 meets WP, RC3 meets SCL, RC4 meets SDA, master chip PIC18F26K22 and AT24C02 works in I2C mode, AT24C02 power down does not lose data, is used for storing significant data; Input/output switching circuit is that the RA mouth of master chip PIC18F26K22 is connected to the control of input/output switching circuit realiration to input/output switching circuit by binding post, and embodiment is as described in input/output switching circuit; Ic for energy metering is that the RB mouth of master chip PIC18F26K22 is connected to ic for energy metering as independently I/O mouth by binding post and realizes electric current, the metering of voltage and electric energy, and embodiment is as described in ic for energy metering; 485 telecommunication circuits are that the RC mouth of master chip PIC18F26K22 is connected to 485 telecommunication circuits as independently I/O mouth by RS485 interface and realizes intelligent micro magnetic and keep circuit breaker to communicate normally, and embodiment is as described in 485 telecommunication circuits.

Described telecommunication circuit is 485 telecommunication circuits, telecommunication circuit is communicated with controlled power equipment with bus mode by RS485 interface, 485 bus communication distribution maps are as Figure 10, RS485 communication interface selects RS485 interface, RS485 interface line is twisted-pair feeder, receives A, B end that RS485 exports respectively.Telecommunication circuit schematic diagram as shown in figure 11, the RC mouth of master chip PIC18F26K22 is as independently I/O mouth, 485 telecommunication circuits are connect after each mouthful of line connects opto-coupler chip isolation, realizing intelligent micro magnetic keeps circuit breaker to communicate normally, RC5 meets RE/DE, RC6 meets TX, RC7 meets RX, 485 telecommunication circuits select the transceiver ADM485 chip having transient voltage and suppress, and clamp circuit, can bear peak value is 400V overvoltage transition, the electrostatic discharge shock of anti-± 15Kv, suppress common mode disturbances, 32 stations can be mounted at most, signal transmission frequency reaches 10MHZ, signal transmission distance reaches more than 1200 meters, and at the output A of ADM485, B holds additional pull-up and pull down resistor R, to provide the defencive function of receiver input pull-down and bus floating.The RS485 communication technology is ripe, and anti-interference is good, signal stabilization, and reliable communications is widely used.

Described electric power management circuit is by transformer and peripheral circuit, two-way bridge type shaping circuit, two-way regulator block and peripheral circuit and bleeder circuit composition, theory diagram is as Figure 12, A, B, C three phase supply power supply exports double-circuit communication voltage 9V and 18V after transformer, A, B, C three-phase alternating current 9V voltage after bridge type shaping circuit, meet LM7805 and peripheral circuit produces direct current 5V voltage, and direct current 5V voltage is powered to RS485 telecommunication circuit buffer circuit; A, B, C three-phase alternating current 18V voltage after bridge type shaping circuit, meet LM317 and peripheral circuit produces direct current 12V voltage, and direct current 12V voltage is to input/output switching circuit supply; Direct current 12V voltage produces 5V voltage VCC after three-terminal regulator block LM7805, and to MCU circuit supply, schematic diagram is as Figure 13.

Claims

1. a three-phase intelligent Miniature magnetic keeps circuit breaker, it comprises input/output switching circuit, ic for energy metering, MCU control circuit, telecommunication circuit and electric power management circuit, it is characterized in that described three-phase intelligent Miniature magnetic keeps circuit breaker under the control of MCU master chip PIC18F26K22, complete the various functions of intelligent micro magnetic maintenance circuit breaker, it is the hardware control of a kind of chip microcontroller communication and control, wherein electric power management circuit provides stable voltage, the signal that its MCU control circuit master chip PIC18F26K22 receives according to ic for energy metering, read electric flux and on off state, and control Push And Release according to the size detecting electric current, relay is by RS485 interface remote control switch, realize Long-distance Control.

2. a kind of three-phase intelligent Miniature magnetic according to claim 1 keeps circuit breaker, it is characterized in that, described input/output switching circuit is made up of No. three relay circuits and three road relay drive circuits, the electric current that single-chip microcomputer exports is increased to the electric current that can drive relay by drive circuit, completes the function of the folding of control relay.

3. a kind of three-phase intelligent Miniature magnetic according to claim 1 keeps circuit breaker, it is characterized in that, wherein said ic for energy metering is made up of current sampling circuit, voltage sampling circuit and electric energy computation chip circuit, completes the processing capacity that intelligent micro magnetic keeps the various electric power signal of circuit breaker.

4. a kind of three-phase intelligent Miniature magnetic according to claim 1 keeps circuit breaker, and it is characterized in that, wherein said MCU control circuit is made up of PIC18F26K22 master chip and peripheral circuit, completes the various controlling functions that intelligent micro magnetic keeps circuit breaker.

5. a kind of three-phase intelligent Miniature magnetic according to claim 1 keeps circuit breaker; it is characterized in that; wherein said telecommunication circuit is that one utilizes RS485 interface to access signal; 485 buses are utilized to carry out RS485 communication; carry out communicating according to RS485 communication protocol, 485 telecommunication circuits are made up of 485 bus driving circuits, protective circuit and photoelectric isolating circuit.

6. a kind of three-phase intelligent Miniature magnetic according to claim 1 keeps circuit breaker, it is characterized in that, electric power management circuit comprises 12V power supply and two-way 5V power circuit, and three-phase voltage signal generates 12V voltage after power transformer and rectification, for relay work; 5V voltage is generated, for MCU circuit work power after 12V voltage; Three phase mains transformer generates 5V voltage after rectification, for RS485 communication isolating power supply.