CN205232071U

CN205232071U - High -power soft starter

Info

Publication number: CN205232071U
Application number: CN201521075838.3U
Authority: CN
Inventors: 刘春旭; 张庚
Original assignee: Xi'an Xiwei Electrical Technology Co Ltd
Current assignee: Xi'an Xiwei Electrical Technology Co Ltd
Priority date: 2015-12-21
Filing date: 2015-12-21
Publication date: 2016-05-11
Anticipated expiration: 2025-12-21

Abstract

The utility model relates to a soft starter technical field specifically discloses a high -power soft starter, the copper bar of being qualified for the next round of competitions, the thyristor module, the radiator that is located the thyristor module top that include the inlet wire copper bar be connected with the power, be connected with the motor, be fixed in the current transformer on the copper bar of being qualified for the next round of competitions, three single phase alternating current contactor, thyristor module and control system are connected, thyristor module is three groups, two inverse parallels in the every group, with inlet wire copper bar, copper bar and the radiator pressure equipment of being qualified for the next round of competitions together, ac contactor's coil is fixed in the inlet wire copper bar and is qualified for the next round of competitions between the copper bar, control system's a central processing unit is high -speed chip ATMEGA16, current transformer through the fix with screw on the copper bar of being qualified for the next round of competitions. The utility model has the advantages that, it is integrated inside soft starter with high -power bypass contactor, under the condition of degrade performance not, reduced the volume, reduced the fault rate, the operation is stable, and the wiring is simple, saves space simple to operate.

Description

A kind of high-power soft starter

Technical field

The utility model relates to soft starter technical field, refers to a kind of high-power soft starter especially.

Background technology

Soft initiator is a kind of electric machinery control device integrating soft start, soft stop, light-load energy saving and multifunction protection; realize the actuating motor level and smooth without impacting in whole starting process; and various parameters in starting process can be regulated according to motor load characteristic, as cut-off current, starting time etc.The all various occasions of speed governing that do not need of asynchronous motor can use soft starter, it be applicable to various need soft start or soft stop occasion.For change load behavior, motor long-time running, only have in short-term or be instantaneously in oepration at full load occasion, application soft starter has light-load energy saving effect.

The ideal product that soft starter has become motor starting to control in the eighties in last century, but operational mode is all on-line operation, and cost and power consumption are all very high, so user is beyond affordability.Afterwards because bypass runs the substituting of soft starter, the cost of System for Soft-starting is reduced greatly, Technological Economy cost, than due to other start mode, reaches the acceptable degree of user, soft starter is obtained in engineer applied universal.

Along with the development of soft starter, bypass run soft starter due to bypass contactor external, add the workload of user, and wiring faults, built in bypass contactor type soft starter becomes a kind of start mode liked by users.

But due to bypass contactor is loaded on soft starter inside, add the volume of soft starter, and due to the switching problem of contactor and soft starter, cause existing commercially conventional be below 90KW, can not meet the demand of client to the soft starter of more than 90KW power.

Utility model content

The purpose of this utility model is to provide a kind of high-power soft starter, when not reducing performance, reducing volume, decreasing failure rate, stable, and wiring is simple, saves space, easy for installation.

To achieve these goals, the utility model have employed following technical scheme: a kind of high-power soft starter, comprises the inlet wire copper bar be connected with power supply, the outlet copper bar be connected with motor, thyristor module, is positioned at the radiator above thyristor module, the current transformer be fixed on outlet copper bar, three single phase ac contactors;

Described thyristor module is connected with control system;

Described thyristor module is three groups, often organizes two inverse parallels, together with being fitted in inlet wire copper bar, outlet copper bar and radiator;

The coil of described A.C. contactor is fixed between inlet wire copper bar and outlet copper bar.

Wherein, the CPU of described control system is high-speed chip ATMEGA16.

Wherein, described current transformer is fixed by screws on outlet copper bar.

The beneficial effects of the utility model are: after adopting said structure, high-power bypass contactor is integrated in soft starter inside, when not reducing performance, reduce volume, decrease failure rate, stable, wiring is simple, saves space, easy for installation.

Three single phase ac contactors are adopted to use as a three-phase ac contactor; between three single-phase contactors, insulation distance and creepage distance meet Standard; each single-phase contactor carries arc extinguishing and defencive function, makes the soft starter of built in bypass contactor to accomplish 280KW.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment technical scheme, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only that the utility model is in order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below the accompanying drawing used required in p-embodiment or description of the prior art is briefly described, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is structural representation of the present utility model;

Fig. 2 is soft starter major loop schematic diagram.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

A kind of high-power soft starter as shown in Figure 1, comprises the inlet wire copper bar 1 be connected with power supply, the outlet copper bar 2 be connected with motor, thyristor module 3, is positioned at the radiator 5 above thyristor module 3, current transformer 6, three single phase ac contactors 4 be fixed on outlet copper bar 2; Described thyristor module 3 is connected with control system; Described thyristor module 3 is three groups, often organizes two inverse parallels, together with being fitted in inlet wire copper bar 1, outlet copper bar 2 and radiator 5; The coil of described A.C. contactor 4 is fixed between inlet wire copper bar 1 and outlet copper bar 2.This installation simplifies installation steps, adds device stability, cuts down the number of intermediate links, and avoids probability of makeing mistakes.

The CPU of described control system is high-speed chip ATMEGA16, and single-chip microcomputer gathers current signal, and command input signals and synchronizing signal, export trigging control pulse to thyristor after analytical calculation.Enabling motor smooth start by controlling triggering and conducting angle, reducing impulse current, extending motor useful life, and have cost low, the features such as starting effect is good.

Fig. 2 is soft starter major loop schematic diagram, and L1, L2, L3 are 3 cross streams electric network sources, and 6 thyristors divide 3 groups, often organizes 2 inverse parallels, and controlled the conducting of thyristor by the triggering signal of thyristor G pole, this 6 tunnel triggering signal is calculated through sampling by single-chip microcomputer.After having started, by relay without source contact control contactor access major loop.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.

Claims

1. a high-power soft starter, is characterized in that: comprise the inlet wire copper bar (1) be connected with power supply, the outlet copper bar (2) be connected with motor, thyristor module (3), the radiator (5) being positioned at thyristor module (3) top, the current transformer (6) be fixed on outlet copper bar (2), three single phase ac contactors (4);

Described thyristor module (3) is connected with control system;

Described thyristor module (3) is three groups, often organizes two inverse parallels, together with being fitted in inlet wire copper bar (1), outlet copper bar (2) and radiator (5);

The coil of described A.C. contactor (4) is fixed between inlet wire copper bar (1) and outlet copper bar (2).

2. a kind of high-power soft starter according to claim 1, is characterized in that: the CPU of described control system is high-speed chip ATMEGA16.

3. a kind of high-power soft starter according to claim 1, is characterized in that: described current transformer (6) is fixed by screws on outlet copper bar (2).