CN201918728U

CN201918728U - Circuit with phase automatic error correction function

Info

Publication number: CN201918728U
Application number: CN201020666172XU
Authority: CN
Inventors: 刘建军; 刘武成
Original assignee: CHUANTIE ELECTRIC (TIANJIN) GROUP Co Ltd
Current assignee: CHUANTIE ELECTRIC (TIANJIN) GROUP Co Ltd
Priority date: 2010-12-17
Filing date: 2010-12-17
Publication date: 2011-08-03
Anticipated expiration: 2020-12-17

Abstract

The utility model provides a circuit with a phase automatic error correction function. The circuit comprises a main circuit and three-phase AC contactors KM1 and KM2, wherein a main contact of the three-phase AC contactor KM1 is respectively connected to three busbars U, V and W of an input power supply of the main circuit; the output of the three-phase AC contactor KM1 is connected with the output end of the power supply; a main contact of the three-phase AC contactor KM2 is respectively connected to the three busbars U, W and V of the input power supply of the main circuit; the output of the three-phase AC contactor KM2 is connected with the output end of the power supply to form a phase inverter circuit; the three busbars U, V and W of the main circuit are connected with the input end of a phase control board; and the output end of the phase control board is connected with a coil of the three-phase AC contactor KM1. The circuit has the effects that the circuit can effectively detect the phase correctness, when an error occurs in the phase sequence of the external power grid, the automatic repair can be carried out to output the correct phase sequence; and during the uninterruptable power supply, the wire sequence is adjusted manually, so that the short circuit of the phase voltage is effectively avoided, and the safety and reliability are improved. The circuit realizes the phase adjustment in the field of railway signal power supply and industrial places with high requirement for three phases.

Description

The circuit of band phase place automatic error correction function

Technical field

The utility model relates to a kind of circuit that can monitor phase place and the automatic error correction of energy, especially the place that phase place is had relatively high expectations, when can not needing manually to adjust under the situation of line preface not cutting off the power supply after the phase sequence mistake, revise the circuit of the band phase place automatic error correction function that recovers and can normally use automatically.

Background technology

Three phase mains is imported power supply as industrial equipment, the following advantage a that compared with single phase poaer supply, transmission efficiency height; B, can form rotating magnetic field; Direct voltage is very stable behind c, the circuit filtering; The magnetic loss of d, three phase electric machine does not have the serious of two-phase, can also obtain stronger magnetic field, thereby following can do littler of equal-wattage.There are not the dead band in e, three phase electric machine, and there is the dead band in two-phase induction motor.But the three-phase power consumption equipment has strict requirement, particularly railway signal power supply to phase sequence, if the phase sequence mistake, gently then motor reverses damage equipment, and is heavy then can cause great train travel accident.

At present, all has the phase-detection function in the three-phase output module of railway signal power supply screen, its operation principle is after mistake appears in phase sequence, the built-in phase sequence check-out console of module can be controlled the main circuit contact device and cut off main circuit input power supply, be transformed into standbyly one the tunnel, but it does not possess automatic repair function.Recovering correct phase sequence must cut off the electricity supply, and adopts manual type, adjusts the line preface.This certainly will cause no small loss to railway transportation.

Summary of the invention

The purpose of this utility model provides a kind of circuit with the phase place automatic error correction function, and it can be implemented in not cut off the power supply does not need manual type to adjust reparation automatically under the situation of line preface, makes the circuit of its output correct phase, and security reliability is strong.

For achieving the above object, the technical solution adopted in the utility model provides a kind of circuit with the phase place automatic error correction function, and this circuit includes the main circuit that connects input three phase mains bus U, V, W, wherein:

This circuit also includes three-phase ac contactor KM1 and three-phase ac contactor KM2, and the main contacts of described three-phase ac contactor KM1 is connected to three buses of U, V, W of the input power supply of main circuit, and the output of KM1 is connected with power output end; The main contacts of three-phase ac contactor KM2 is connected to the U of the input power supply of main circuit, W, and three buses of V, three-phase ac contactor KM2 output connects and is connected with power output end, forms phase inverter; Three bus U, V of described main circuit, W are connected with phase control plate input, and the output of phase control plate is connected with the coil of three-phase ac contactor KM1.

Effect of the present utility model is the effectively correctness of detected phase of this circuit arrangement, and after the phase sequence of external power grid made a mistake, this circuit can be realized repairing automatically, and the output correct phase, does not need to have a power failure and adopts manual type to adjust the line preface.Two contactors adopt interlocked relationship, have effectively avoided the phase voltage short circuit, have improved fail safe of the present utility model and reliability greatly.The utility model is extensive use of the railway signal power supply field and three-phase phase is required high industrial site, under the situation of uninterrupted power supply, has realized the adjustment of phase place.

Description of drawings

Fig. 1 is an electrical schematic diagram of the present utility model;

Fig. 2 is the circuit theory diagrams of phase control plate of the present utility model;

Fig. 3 is the interlocking connection layout of contactor KM1 of the present utility model and contactor KM2.

Embodiment:

Reaching example in conjunction with the accompanying drawings is illustrated the circuit structure of band phase place automatic error correction function of the present utility model.

As shown in Figure 1, the circuit structure of the utility model band phase place automatic error correction function is that this circuit is made up of phase control plate and main circuit, phase inverter three bulks.

Input and main circuit that the phase control plate is connected to detected loop constitute the bypass relation.The normally opened contact of relay J is serially connected in the wire loop of three-phase ac contactor KM1.The normally closed interlock of three-phase ac contactor KM1 is serially connected in the wire loop of three-phase ac contactor KM2 contactor.The normally closed interlock of three-phase ac contactor KM2 contactor is connected on the wire loop of three-phase ac contactor KM1 contactor.

As shown in Figure 2, include in the described phase control plate with light-emitting diode and be connected the controllable silicon that links to each other with relay J, described three phase mains bus U, V, W are connected with silicon controlled A, G, K three utmost points by divider resistance.In the phase control plate, when three phase mains bus U, V, W connect among the phase control plate XWKZB silicon controlled A, G, the K utmost point respectively by divider resistance R, controllable silicon will conducting in half period, light-emitting diode is normally luminous, the relay J coil gets simultaneously, its normally opened contact closure, three-phase ac contactor KM1 coil gets, its main contacts closure, the auxiliary normally-closed contact of three-phase ac contactor KM1 disconnects, three-phase ac contactor KM2 coil losing electricity, its place major loop is in the state of disconnection, and the input and output of three phase mains keep pass-through state.When three phase mains bus U, V, W phase error, the silicon controlled ON time will shorten in the phase control plate, average current reduces thereupon, the brightness of light-emitting diode also will greatly be reduced to extinguishes, electric current on the phase control plate repeat circuit J coil is reduced to its normally opened contact disconnection simultaneously, the outage of KM1 wire loop, its main contacts disconnects, the long auxiliary contact closure of closing, the conducting of three-phase ac contactor KM2 wire loop, its main contacts closure has been finished V and has been exchanged with W phase sequence mutually mutually, finally reaches the purpose of paraphase.

The circuit function of the utility model band phase place automatic error correction function is achieved in that

As shown in Figure 1, the correct line preface of the input of external power grid power supply is U, V, and W, N sends into its output through the main contacts of three-phase ac contactor KM1, and the phase sequence of output voltage is U, V, W, N.The line preface that the main contacts of three-phase ac contactor KM2 connects input is U, W, and V, N constitutes phase inverter.Phase control plate XWKZB is connected to the input of power supply, and by detecting the correctness output detection signal of input voltage phase, shown in the dotted line 1, whether the coil of control three-phase ac contactor KM1 has.

As shown in Figure 3, the interlocked relationship formula of three-phase ac contactor KM1 and three-phase ac contactor KM2 is formed like this: the normally opened contact of relay J is connected with the normally closed node of three-phase ac contactor KM2, the normally closed node of three-phase ac contactor KM2 is connected with the coil of three-phase ac contactor KM1, the normally closed node of three-phase ac contactor KM1 is connected with the coil of three-phase ac contactor KM2, and three-phase ac contactor KM1 and three-phase ac contactor KM2 constitute interlocked relationship.

Phase control plate XWKZB circuit is to form like this: three phase mains bus U, V, W are connected with silicon controlled A, G, K three utmost points by divider resistance.Controllable silicon normal light of conducting light-emitting diode in single-phase half period when the power input phase sequence is U, V, W, the relay J coil gets, relay J length is opened the auxiliary contact closure, three-phase ac contactor KM1 coil gets, three-phase ac contactor KM1 main contacts closure, the length of KM1 are closed auxiliary contact and are disconnected, and three-phase ac contactor KM2 main contacts disconnects simultaneously, the work of main circuit guiding path, phase inverter disconnect does not work; When power input phase sequence phase sequence mistake, then light-emitting diode luminance greatly is reduced to and extinguishes, phase control plate XWKZB repeat circuit J normally-closed contact disconnects, three-phase ac contactor KM1 coil losing electricity, and three-phase ac contactor KM1 main contacts disconnects, main circuit disconnects, the normally closed auxiliary contact closure of while KM1, three-phase ac contactor KM2 coil closure, the main contacts closure of three-phase ac contactor KM2, phase inverter work, its output are the automatic reparations that U, V, W realize phase sequence.

What the three-phase ac contactor KM1 among Fig. 3 and three-phase ac contactor KM2 used is that coil rating voltage is the three-phase contactor that exchanges of 220V, and the supply power mode of three-phase ac contactor KM1 and three-phase ac contactor KM2 coil is to adopt a bus of three phase mains to add the mode of zero line in the utility model.

Claims

1. circuit with the phase place automatic error correction function, this circuit includes the main circuit that connects input three phase mains bus U, V, W, it is characterized in that: this circuit also includes three-phase ac contactor KM1 and three-phase ac contactor KM2, the main contacts of described three-phase ac contactor KM1 is connected to three buses of U, V, W of the input power supply of main circuit, and the output of KM1 is connected with power output end; The main contacts of three-phase ac contactor KM2 is connected to the U of the input power supply of main circuit, W, and three buses of V, three-phase ac contactor KM2 output is connected with power output end, forms phase inverter; Three bus U, V of described main circuit, W are connected with phase control plate input, and the output of phase control plate is connected with the coil of three-phase ac contactor KM1.

2. the circuit of band phase place automatic error correction function according to claim 1, it is characterized in that: include in the described phase control plate with light-emitting diode and be connected the controllable silicon that links to each other with relay J, described three phase mains bus U, V, W are connected with silicon controlled A, G, K three utmost points by divider resistance.