CN206039213U - Voltage sample adaptive system - Google Patents

Abstract

The utility model relates to a control circuit technical field is a voltage sample adaptive system particularly, including rectification filtering circuit and output control circuit, voltage sample adaptive system insert the three -way electric wire netting of three -phase, the three -wire N1 of three -phase reaches A1 mutually and is connected to rectification filtering circuit, rectification filtering circuit be connected to output control circuit behind wherein rectifier bridge D1 and zener diode DW1 rectifying and wave -filtering, output control circuit comprises control chip U1, relay K1, relay K2, relay K3, the control chip U1 output is connected to relay K1, relay K2, relay K3's coil wiring respectively and holds, grid voltage signal output part is regarded as respectively to relay K1, relay K2, relay K3's tip side. This circuit adopts rectification filter circuit and output control circuit to realize getting from the electric wire netting for distinguish the electric wire netting and use the electric network as three phase three wire system or three -sphase four -wire system, thereby realize two kinds of switchings between the electric wire netting.

Description

A kind of voltage sample Adaptable System

[technical field]

This utility model is related to control circuit technical field, specifically a kind of voltage sample Adaptable System.

[background technology]

In order that the voltages keep constant state of output, voltage sample deposited as the important step in low pressure controller To realize on same electrical equipment in prior art that the sampling of phase three-wire three and three-phase and four-line is more difficult, in sampling process Middle technical scheme realizes that mainly by terminating different wiring boards in three-phase inlet wire that is, user need to be according to reality in wiring Wiring diagram wiring, can not wrong, can not only burn out circuit after wrong, can cause sampling failure, cause the manpower duplication of labour.

[utility model content]

This utility model is according to the relatively complicated problem of above-mentioned voltage sample process, there is provided a kind of to be applied to three-phase three Line and three-phase and four-line are used in mixed way the voltage sample Adaptable System of occasion.

To achieve these goals, a kind of voltage sample Adaptable System is designed, including rectification filtering circuit and output control Loop processed, described voltage sample Adaptable System are accessed in phase three-wire three electrical network, and the N1 phases of phase three-wire three and A1 are connected and are connected to Rectification filtering circuit, described rectification filtering circuit connect after wherein rectifier bridge D1 and Zener diode DW1 rectifying and wave-filterings To output control circuit, described output control circuit is made up of control chip U1, relay K1, relay K2, relay K3, Described control chip U1 outfans are respectively connecting to relay K1, relay K2, the winding wiring of relay K3, relay K1, relay K2, the tip side of relay K3 are respectively as mains voltage signal outfan.

Described rectification filtering circuit is by rectifier bridge D1, polar capacitor C1, polar capacitor C2, resistance R1 and Zener diode DW1 is constituted, and the two ends of described rectifier bridge D1 are connected to N1 phases and A1 phases respectively, and the outfan connection resistance R1 of rectifier bridge D1 is followed by No. 1 pin, No. 2 pins and No. 3 pins to control chip U1, and it is in parallel between resistance R1 and control chip U1 to extract one end out Zener diode DW1 and polar capacitor C2 is connected to, described rectifier bridge D1 separately draws one end ground connection, in the outfan of rectifier bridge D1 Extract one between resistance R1 out and terminate ground connection after polar capacitor.

Described output control circuit is made up of control chip U1, relay K1, relay K2, relay K3, described No. 1 pin of control chip U1, No. 2 pins and No. 3 pins are connected to rectification filtering circuit, No. 16 pins of control chip U1, No. 15 pins and No. 14 pins are sequentially connected No. 4 pins of relay K1, relay K2, relay K3, No. 5 pipes of relay K1 Foot is connected to diode D2 and 24V voltage, and No. 5 pins of relay K1 separately extract one end out with relay K2, No. 5 pipes of relay K3 Foot is connected to No. 9 pins of control chip U1 after merging, No. 1 tip side of relay K1 connects current transformer PT1 opposite sides, No. 1 tip side of relay K2 connects the opposite side of current transformer PT2, No. 1 tip side connection Current Mutual Inductance of relay K3 The opposite side of device PT3, described current transformer PT1, current transformer PT2, current transformer PT3 outfan it is in parallel respectively Collection voltages signal is exported after resistance R5, R6, R7.

This utility model compared with the existing technology, has an advantage in that：This circuit adopts current rectifying and wave filtering circuit and output control Circuit realiration power taking from electrical network, is three-phase three-wire system or three-phase four-wire system to distinguish electrical network power utilization network, so as to realize two Switching between kind of electrical network so that power grid control process is more intelligent, only by controller itself automatic switchover mode fitting Different power grid environments are answered, controller will not be damaged, effectively extend the service life of controller.

[description of the drawings]

Fig. 1 is connection diagram of the present utility model；

Fig. 2 is circuit theory diagrams of the present utility model.

[specific embodiment]

The utility model is described in further detail below in conjunction with the accompanying drawings, the structure and principle of this device people professional to this For be very clearly.It should be appreciated that specific embodiment described herein is only to explain this utility model, and without In restriction this utility model.

This voltage sample Adaptable System is accessed in phase three-wire three electrical network, between three-phase three-wire system and three line four-wire systems Automatic switchover.See that Fig. 1, the N1 phases of phase three-wire three and A1 are connected and be connected to rectification filtering circuit, rectification filtering circuit is through wherein Be connected to output control circuit after rectifier bridge D1 and Zener diode DW1 rectifying and wave-filterings, output control circuit by control chip U1, Relay K1, relay K2, relay K3 composition, control chip U1 outfans be respectively connecting to relay K1, relay K2, after The winding wiring of electrical equipment K3, relay K1, relay K2, the tip side of relay K3 are exported respectively as mains voltage signal End.

Specific circuit structure diagram is shown in Fig. 2, and rectification filtering circuit is by rectifier bridge D1, polar capacitor C1, polar capacitor C2, electricity Resistance R1 and Zener diode DW1 compositions, the two ends of rectifier bridge D1 are connected to N1 phases and A1 phases, the outfan connection of rectifier bridge D1 respectively Resistance R1 is followed by No. 1 pin of control chip U1, No. 2 pins and No. 3 pins, and extracts one end out in resistance R1 and control chip Between U1, parallel connection is connected to Zener diode DW1 and polar capacitor C2, and rectifier bridge D1 separately draws one end ground connection, in the defeated of rectifier bridge D1 Go out and terminate ground connection after polar capacitor.Output control circuit by control chip U1, relay K1, after Electrical equipment K2, relay K3 are constituted, and No. 1 pin of described control chip U1, No. 2 pins and No. 3 pins are connected to rectifying and wave-filtering Loop, No. 16 pins of control chip U1, No. 15 pins and No. 14 pins are sequentially connected relay K1, relay K2, relay No. 4 pins of K3, No. 5 pins of relay K1 are connected to diode D2 and 24V voltage, and No. 5 pins of relay K1 separately extract one out End is connected to No. 9 pins of control chip U1 after merging with No. 5 pins of relay K2, relay K3.Wherein, C1 and C2 are The current signal that current transformer is exported is converted into voltage signal for sample resistance by filter capacitor, R5, R6, R7,

No. 1 pin of relay K1, K2, K3, No. 2 pins and No. 3 pins are all tip side, according to relay K1, K2, K3 No. 1 pin, No. 2 pins, the closure of No. 3 pins, the voltages of openings switching output, the 1 of this circuit relay electrical equipment K1 Number tip side connection current transformer PT1 opposite sides, No. 1 tip side of relay K2 connect the opposite side of current transformer PT2, No. 1 tip side of relay K3 connects the opposite side of current transformer PT3, described current transformer PT1, current transformer Collection voltages signal is exported after PT2, outfan difference parallel resistance R5, R6 of current transformer PT3, R7

Relay K1, relay K2, the tip side of relay K3 can also be connected to resistance respectively as voltage signal output end As partial pressure, now carried out with voltage signal output end connection current transformer PT1, current transformer PT2, current transformer PT3 Explanation：

When equipment is accessed in phase three-wire three electrical network, as N phases loop does not have electric current to flow through, then Zener diode DW1 two End no-voltage, the 14 of chip U1,15, No. 16 pins export high level, then three relays K1, K2, K3 are not turned on, relay No. 1 pin and No. 2 pins of device K1, K2, K3 is closed, now three road voltage U_AC、U_BA、U_CBI.e. the voltage of three-phase three-wire system, divides Amplifier is not given and then to single-chip microcomputer by current-limiting resistance R2, R3, R4 summation current transformer PT1, PT2, PT3 output of sampling, i.e., Complete voltage sample of the controller in three-phase three-wire system electrical network.

When equipment is accessed in three-phase and four-line electrical network, as N phases loop has electric current to flow through, then Zener diode DW1 two ends For 5V, the 14 of chip U1,15, No. 16 pins export low level, and now three relays K1, K2, K3 are both turned on, relay No. 1 pin of K1, K2, K3 is switched to and No. 3 pin closures, now three road voltage U_AN、U_BN、U_CNThat is the voltage of three-phase four-wire system, Amplifier is given and then to single-chip microcomputer by current-limiting resistance R2, R3, R4 summation current transformer PT1, PT2, PT3 sampling output respectively, Voltage sample of the controller in three-phase four-wire system electrical network is completed.

Claims (3)

1. a kind of voltage sample Adaptable System, including rectification filtering circuit and output control circuit, it is characterised in that described Voltage sample Adaptable System is accessed in phase three-wire three electrical network, and the N1 phases of phase three-wire three and A1 are connected and are connected to rectification filtering circuit, Described rectification filtering circuit is connected to output control after wherein rectifier bridge D1 and Zener diode DW1 rectifying and wave-filterings and returns Road, described output control circuit are made up of control chip U1, relay K1, relay K2, relay K3, described control core Piece U1 outfans are respectively connecting to relay K1, relay K2, the winding wiring of relay K3, relay K1, relay K2, The tip side of relay K3 is respectively as mains voltage signal outfan.

2. a kind of voltage sample Adaptable System as claimed in claim 1, it is characterised in that described rectification filtering circuit by Rectifier bridge D1, polar capacitor C1, polar capacitor C2, resistance R1 and Zener diode DW1 composition, the two ends of described rectifier bridge D1 N1 phases and A1 phases is connected to respectively, and the outfan connection resistance R1 of rectifier bridge D1 is followed by No. 1 pin of control chip U1, No. 2 pipes Foot and No. 3 pins, and extract one end parallel connection between resistance R1 and control chip U1 out and be connected to Zener diode DW1 and polar capacitor C2, described rectifier bridge D1 separately draw one end ground connection, extract one out and terminate polarity between the outfan and resistance R1 of rectifier bridge D1 It is grounded after electric capacity.

3. a kind of voltage sample Adaptable System as claimed in claim 1, it is characterised in that described output control circuit by Control chip U1, relay K1, relay K2, relay K3 compositions, No. 1 pin of described control chip U1, No. 2 pins and No. 3 pins are connected to rectification filtering circuit, and No. 16 pins of control chip U1, No. 15 pins and No. 14 pins are sequentially connected relay Device K1, relay K2, No. 4 pins of relay K3, No. 5 pins of relay K1 are connected to diode D2 and 24V voltage, relay No. 5 pins of K1 are separately extracted out and are connected to No. 9 of control chip U1 after one end is merged with No. 5 pins of relay K2, relay K3 Pin, No. 1 tip side connection current transformer PT1 opposite side of relay K1, No. 1 tip side connection electric current of relay K2 are mutual The opposite side of sensor PT2, No. 1 tip side of relay K3 connect the opposite side of current transformer PT3, described current transformer Collection voltages letter is exported after PT1, current transformer PT2, outfan difference parallel resistance R5, R6 of current transformer PT3, R7 Number.