CN203206127U

CN203206127U - Transformer control circuit of voltage regulator

Info

Publication number: CN203206127U
Application number: CN 201320129251
Authority: CN
Inventors: 叶少雄
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-21
Filing date: 2013-03-21
Publication date: 2013-09-18
Anticipated expiration: 2023-03-21

Abstract

The utility model belongs to the technical field of voltage regulators, and in particular relates to a transformer control circuit of a voltage regulator. The transformer control circuit of the voltage regulator comprises a circuit breaker QF1, a phase sequence protection sampling input interface, a compensation transformer T1, a voltage regulating transformer T2, an auxiliary transformer T3, alternating current contactors KM1, KM2, KM3, KM4, KM5, KM6, KM7, KM8, KM9, KM10, KM11, KM12 and KM main and a voltage regulator output end. The transformer control circuit of the voltage regulator has the advantages of continuous and sensitive reaction, simple structure and stable performance, and avoids circuit break.

Description

A kind of transformer control circuit of pressurizer

Technical field

The utility model belongs to the pressurizer technical field, particularly relates to a kind of transformer control circuit of pressurizer.

Background technology

Factory and enterprise often need to use stable voltage, uses for some accurate instrument and equipments, and existing pressurizer mostly is contact and electronic numerical control formula.The contact pressurizer slides at coil by carbon brush, selects different coil turns to carry out pressure regulation.Its main shortcoming has: the rough or electric current of coil all can produce spark when large; Carbon brush turn-to-turn short circuit can occur often when coil slides, thereby is not suitable for having dust, inflammable place to use at some; Carbon brush easily causes wearing and tearing in sliding process, therefore need regularly to change and cleaning, wastes a large amount of human resources; Reaction speed is slower.Electronic numerical control formula pressurizer normal operation high-power silicon controlled rectifier control and compensation transformer carries out pressure regulation.Its major defect is: although 1 electronic numerical control formula pressurizer fast response time, in action handoff procedure order, still exist instantaneous short circuit or moment breaking phenomena; 2 controllable silicons itself are exactly a harmonic source when conducting, can produce a large amount of feedback of harmonics in electrical network, and miscellaneous equipment is impacted; 3 controllable silicons are not shock-resistant, and maintenance cost is high.

Summary of the invention

The purpose of this utility model is to avoid weak point of the prior art and transformer control circuit that a kind of pressurizer is provided, and it is sensitive, simple in structure continuously that it has reaction, and the phenomenon that turn-to-turn short circuit, instantaneous short circuit, moment open circuit has been avoided in stable performance.

The purpose of this utility model realizes by following technical measures.

A kind of transformer control circuit of pressurizer comprises disconnect QF1, phase sequence sampling input interface, compensator transformer T1, voltage regulating transformer T2, auxiliary transformer T3, A.C. contactor KM1, KM2, KM3, KM4, KM5, KM6, KM7, KM8, KM9, KM10, KM11, KM12, the KM output end of voltage stabilizer of advocating peace; Three fiery output lines of QF1 one termination three phase mains, another termination T1, phase sequence sampling input interface; Another termination KM master's of T1 a end; KM master's the other end is used for connecing output end of voltage stabilizer; The tap of a winding of the A phase of T1 has A1, A2 and A3, and A1 connects an end of KM7 contact, and A2 connecting to neutral line, A3 connect an end of KM8 contact; A winding of the B phase of T1 has tap B1, B2 and B3, and B1 connects an end of KM7 contact, and B2 connecting to neutral line, B3 connect an end of KM8 contact; A winding of the C phase of T1 has tap C1, C2 and C3, and tap C1 connects an end of KM7 contact, tap C2 connecting to neutral line, and tap C3 connects an end of KM8 contact; The A of T3 has tap 11,21,31 mutually, and tap 11 connects an end of KM1, KM3 and KM5 contact, and tap 21 connects the other end of KM7 contact and KM8 contact, and tap 31 connects an end of KM2, KM4 and KKM6 contact; The B of T3 has tap 12,22,32 mutually, and tap 12 connects an end of KM1, KM5 and KM4 contact, and tap 22 connects the other end of KM7 contact and KM8 contact, and tap 32 connects an end of KM3, KM2 and KKM6 contact; The C of T3 has tap 13,23,33 mutually, and tap 13 connects an end of KM1, KM5 and KM4 contact, and tap 23 connects the other end of KM7 contact and KM8 contact, and tap 33 connects an end of KM3, KM2 and KKM6 contact; Tap mutually all has 6 with C for the A phase of T2, B phase, is connected on respectively the other end of KM1, KM2, KM3, KM4, KM5, KM6 contact; Power supply tap one terminal connecting zero line of T2, the end of another termination KM9; Another termination KM master's of KM9 a end.

The transformer control circuit of a kind of pressurizer of the utility model, the Same Name of Ends of transformer is on one side same, so when input voltage is higher than the voltage stabilizing value, KM1 ~ KM7 coil gets electric work, make the too high voltage of compensator transformer decay, when input voltage was lower than the voltage stabilizing value, KM1～KM8 coil got electric work, the part voltage of compensator transformer stack undercompensation.The utility model pressurizer as long as change the break-make of KM7 and KM8 with regard to the polarity of changeable bucking voltage, just can obtain different bucking voltages by change KM1, KM3, KM5 with KM2, KM4, KM6 break-make in the pressure regulation process.And these six A.C. contactors only have all the time one and connect in the pressure regulation process, thereby have solved the phenomenon that turn-to-turn short circuit, instantaneous short circuit, moment open circuit.Have stable performance, the characteristics such as simple in structure can adapt to different operational environments.

Description of drawings

Utilize accompanying drawing that the utility model is described further, but the content in the accompanying drawing does not consist of any restriction of the present utility model.

Fig. 1 is the circuit diagram of an embodiment of the present utility model.

Embodiment

The utility model is described in further detail with the following Examples.

Circuit diagram of the present utility model comprises disconnect QF1, phase sequence sampling input interface, compensator transformer T1, voltage regulating transformer T2, auxiliary transformer T3, main contactor KM master, output end of voltage stabilizer as shown in Figure 1; Three fiery output lines of QF1 one termination three phase mains, another termination T1, phase sequence sampling input interface and KM master's a end; Another termination output end of voltage stabilizer of KM master;

The tap of a winding of the A phase of T1 has A1, A2 and A3, and A1 connects an end of KM7 contact, and A2 connecting to neutral line, A3 connect an end of KM8 contact; A winding of the B phase of T1 has tap B1, B2 and B3, and B1 connects an end of KM7 contact, and B2 connecting to neutral line, B3 connect an end of KM8 contact; A winding of the C phase of T1 has tap C1, C2 and C3, and tap C1 connects an end of KM7 contact, tap C2 connecting to neutral line, and tap C3 connects an end of KM8 contact;

The A of T3 has tap 11,21,31 mutually, and tap 11 connects an end of KM1, KM3 and KM5 contact, and tap 21 connects the other end of KM7 contact and KM8 contact, and tap 31 connects an end of KM2, KM4 and KKM6 contact; The B of T3 has tap 12,22,32 mutually, and tap 12 connects an end of KM1, KM5 and KM4 contact, and tap 22 connects the other end of KM7 contact and KM8 contact, and tap 32 connects an end of KM3, KM2 and KKM6 contact; The C of T3 has tap 13,23,33 mutually, and tap 13 connects an end of KM1, KM5 and KM4 contact, and tap 23 connects the other end of KM7 contact and KM8 contact, and tap 33 connects an end of KM3, KM2 and KKM6 contact;

Tap mutually all has 6 with C for the A phase of T2, B phase, is connected on respectively the other end of KM1, KM2, KM3, KM4, KM5, KM6 contact; Power supply tap one terminal connecting zero line of T2, the end of another termination KM9; Another termination KM master's of KM9 a end.

For better explanation the utility model pressurizer, existing A in three-phase sets forth as example mutually.The secondary winding of A phase compensator transformer T1 is connected between the leading-out terminal of disconnect QF1 and main contactor KM master's the end of incoming cables; One time winding has three taps to be respectively tap A1, tap A2, tap A3.What tap A1 was connected on KM7 often opens main contact, and what tap A3 was connected on KM8 often opens main contact, and the centre tap A2 of A phase compensator transformer T1 is connected on the zero line N.

Auxiliary transformer T3 has three taps, is respectively tap 11, tap 21, tap 31.The tap 21 of A phase auxiliary transformer T3 is connected on that KM7 often opens main contact and KM8 often opens on the common point of main contact, and the tap 11 of A phase auxiliary transformer T3 is connected on KM1 and often opens that main contact, KM3 often open main contact and KM5 often opens on the common point of main contact; The tap 31 of A phase auxiliary transformer T2 is connected on KM2 and often opens that main contact, KM4 often open main contact and KM6 often opens on the common point of main contact.

Voltage regulating transformer T2 has six taps, each tap is connected on respectively corresponding KM1 and often opens main contact, KM2 and often open main contact, KM3 and often open main contact, KM4 and often open main contact, KM5 and often open main contact, KM6 and often open on the main contact, power supply is taken out first connecting to neutral line N, another tap is connected on often opening on the main contact of KM9, and the other end that KM9 often opens main contact is connected on the leading-out terminal of corresponding compensator transformer.Change the combinations of states of contactor KM1, KM3, KM5 and KM2, KM4, KM6 work, the multiple voltage with input voltage stack or decay of compensator transformer output is come.When output voltage exceeded precision of voltage regulation scope, control circuit was adjusted switching to the bucking voltage of compensator transformer.Until output voltage stabilization is in precision of voltage regulation scope.Other two-phase also is so, is not just giving unnecessary details herein.

Should be noted that at last; above embodiment only is used for the explanation the technical solution of the utility model but not to the restriction of the utility model protection range; although with reference to preferred embodiment the utility model has been done detailed description; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from essence and the scope of technical solutions of the utility model.

Claims

1. the transformer control circuit of a pressurizer is characterized in that: comprise disconnect QF1, phase sequence sampling input interface, compensator transformer T1, voltage regulating transformer T2, auxiliary transformer T3, A.C. contactor KM1, KM2, KM3, KM4, KM5, KM6, KM7, KM8, KM9, KM10, KM11, KM12, the KM output end of voltage stabilizer of advocating peace; Three fiery output lines of QF1 one termination three phase mains, another termination T1, phase sequence sampling input interface; Another termination KM master's of T1 a end; KM master's the other end is used for connecing output end of voltage stabilizer; The tap of a winding of the A phase of T1 has A1, A2 and A3, and A1 connects an end of KM7 contact, and A2 connecting to neutral line, A3 connect an end of KM8 contact; A winding of the B phase of T1 has tap B1, B2 and B3, and B1 connects an end of KM7 contact, and B2 connecting to neutral line, B3 connect an end of KM8 contact; A winding of the C phase of T1 has tap C1, C2 and C3, and tap C1 connects an end of KM7 contact, tap C2 connecting to neutral line, and tap C3 connects an end of KM8 contact; The A of T3 has tap 11,21,31 mutually, and tap 11 connects an end of KM1, KM3 and KM5 contact, and tap 21 connects the other end of KM7 contact and KM8 contact, and tap 31 connects an end of KM2, KM4 and KKM6 contact; The B of T3 has tap 12,22,32 mutually, and tap 12 connects an end of KM1, KM5 and KM4 contact, and tap 22 connects the other end of KM7 contact and KM8 contact, and tap 32 connects an end of KM3, KM2 and KKM6 contact; The C of T3 has tap 13,23,33 mutually, and tap 13 connects an end of KM1, KM5 and KM4 contact, and tap 23 connects the other end of KM7 contact and KM8 contact, and tap 33 connects an end of KM3, KM2 and KKM6 contact; Tap mutually all has 6 with C for the A phase of T2, B phase, is connected on respectively the other end of KM1, KM2, KM3, KM4, KM5, KM6 contact; Power supply tap one terminal connecting zero line of T2, the end of another termination KM9; Another termination KM master's of KM9 a end.