CN2497483Y

CN2497483Y - A.C. Soft starter

Info

Publication number: CN2497483Y
Application number: CN 01244386
Authority: CN
Inventors: 秦宏
Original assignee: MACHINERY MANUFACTURE AND REPAIR PLANT YANKUANG GROUP CO Ltd
Current assignee: MACHINERY MANUFACTURE AND REPAIR PLANT YANKUANG GROUP CO Ltd
Priority date: 2001-08-17
Filing date: 2001-08-17
Publication date: 2002-06-26
Anticipated expiration: 2011-08-17

Abstract

The utility model provides an alternating current soft starter with a stable and reliable starting speed used for the heavy load transportation equipments such as the underground or open-pit coal mines, metallurgical mines, port terminals, coal preparation plants, power plants and so on. The starter consists of an upper body and a lower body. The upper body is connected with a bell mouth. The upper body is internally provided with a main terminal and a seven-core terminal while the lower body is connected with a track and a drawer-typed core frame arranged on the upper part of the track. A transmission controller is arranged on the middle of the core frame and the core frame on the outer side of the transmission controller is respectively connected with a high-power thyristor, a resistance-capacitance absorber, an intrinsic safety power source, a monitor, a vacuum contactor, a power source transformer and a synchronous transformer.

Description

A kind of alternating current soft starter

Technical field

The utility model relates to the adhesive tape conveyor that is used for mining assistant conveyance and the mine flameproof and intrinsic safety type alternating current soft starter of inorganic rope winch.

Background technology

The AC asynchronous motor soft initiator of prior art only is adapted at the occasion of industrial automation and uses, promptly only be applicable to little load soft initiator, can not be used for big load such as down-hole or open coal mine, metallurgical mine, port and pier, coal preparation plant, power plant (as exchanging the asynchronous motor of 660V, 1140V voltage) adverse circumstances transporting equipment soft start.

The utility model content

The purpose of this utility model provides and a kind ofly is suitable for that big load transport equipment such as down-hole or open coal mine, metallurgical mine, port and pier, coal preparation plant, power plant uses and the steady alternating current soft starter reliably of toggle speed.

The purpose of this utility model can realize by following measure; This starter is made of lower box and upper box, upper box is connected with horn mouth, main terminal and seven-core terminal are arranged in the upper box, be connected with track in the lower box and place the drawer type core frame of track top, drive controller is positioned at the middle part of core frame, is connected with high-power thyristor and rc absorber, intrinsic safety electric source, watch-dog, vacuum contactor, power transformer and synchrotrans respectively on the core frame in the drive controller outside.

The purpose of this utility model also can realize by following measure: drive controller is made of the microprocessor of 16 bit.High-power thyristor is made as 3 groups.

Drive controller described in the utility model, high-power thyristor and rc absorber, intrinsic safety electric source, watch-dog, vacuum contactor, power transformer, synchrotrans are city's pin member in the market.

The utility model is soft switch with antiparallel 3 groups of high-power thyristors, it constitutes the outer closed loop of speed feedback by the belt speed transducer, current feedback is formed two closed-loop regulating systems as interior closed loop, control the high-power thyristor element, in the start-up course of motor, drive controller is controlled motor by " S " type curve that customer requirements is default automatically according to the belt speed sensor signal, and guarantees to start acceleration a≤0.3m/s ²Make it steadily finish start-up course reliably in the scope.After the motor start-up process was finished, by the adhesive of drive controller control A.C. contactor, the high-power thyristor that short circuit is all made motor directly drop into the operation of electrical network total head.

The utility model can be suitable for big load such as down-hole or open coal mine, metallurgical mine, port and pier, coal preparation plant, power plant (as exchanging the asynchronous motor of 660V, 1140V voltage) transporting equipment soft start, it is little to have starting current, toggle speed is steadily reliable, the adhesive tape friction, to advantage such as the impact of electrical network is little, and starting curve is " S " type curve, this curve can be adjusted according to actual needs, thereby reduce the belt tension when starting, the requirement that reduction is strong to the belt band, and then can reduce the initial cost of belt feeder, prolong belt useful life.

Description of drawings

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

Fig. 2 is a structural representation of the present utility model;

Fig. 3 is that the broken section structural representation is looked on the left side of Fig. 2 of the present utility model;

Fig. 4 is that the utility model upper box unit drives winding diagram;

Fig. 5 is that the utility model upper box multimachine drives winding diagram.

This starter of embodiment is made of lower box 11 and upper box 12, upper box 11 is connected with horn mouth 1 (two big with six little), six main terminals and four seven-core terminals are arranged in the upper box 12, main terminal be divided into A, B, C, and U, V, W pass in and out line, seven-core terminal is used for external measuring speed signal and far controlling and working state signal.Be provided with the drawer type core frame 10 that is connected with track 7 in the lower box 11 of glass window 3 and places track 7 tops, the drive controller 5 that is made of the microprocessor of 16 bit is positioned at the middle part of core frame 10, is connected with 3 groups of high-power thyristors 4 and rc absorber 6, intrinsic safety electric source 8, watch-dog 9, vacuum contactor 13, power transformer 14 and synchrotrans 15 on the core frame 10 in drive controller 5 outsides respectively.During use, according to length, tension force, elasticity deepening and the elastic shrinkage of conveyer, the startup acceleration smooth starting within the limits prescribed of adjusting the numerical value of " S " type curve and guaranteeing start-up time to carry.Mode of operation has two kinds: control and manually control automatically.Manual mode is debugging or uses when closely controlling, and automated manner uses during for ordinary production.Automated manner:, after the feeding switch closure, after 3 seconds of built in self testing, just start working automatically with 2 short circuits of the X1:5 in the upper box, X1:7.Manual mode: connect start button (often opening) between X1:5 in the upper box and the X1:7, connect stop button (often opening) between X1:6 and the X1:7, after the feeding switch closure, the start-stop of soft start is controlled by operating personnel's control button at this moment.When unit uses, speed measuring device+the 15V power end is connected on X1:1, and the speed output is connected on X1:2, and OV terminates at X1:4, and shielding this moment end will be at X1:4.When multi-machine interaction, must define wherein that a starter is a main frame, other is a slave, the required wiring, in addition X2:3 and X1:3 are linked when the wiring of main frame is used except that unit, X2:4 and X1:4 link, have only main frame to use automated manner or manual mode, slave need not to connect speed measuring device; With shielded type cable X4:4, the X4:5 of main frame and X4:4, X4:5 and the X4:6 terminal of X4:6 terminal and all slaves are linked, slave is followed the tracks of the main frame electric current by main frame, reaches the purpose of power-balance.When directly starting, the normal opened contact of diverter switch is received respectively on X1:3 and the X1:7, be the soft start state; When turn-knob is closed, the bypass contactor closure in the soft initiator, directly full voltage starting motor.During multi-machine interaction, slave need not to connect diverter switch.

Claims

1, a kind of alternating current soft starter, it is characterized in that this starter is made of lower box (11) and upper box (12), upper box (12) is connected with horn mouth (1), upper box has main terminal and seven-core terminal in (12), be connected with track (7) in the lower box (11) and place the drawer type core frame (10) of track (7) top, drive controller (5) is positioned at the middle part of core frame (10), is connected with high-power thyristor (4) and rc absorber (6) respectively on the core frame (10) in drive controller (5) outside, intrinsic safety electric source (8), watch-dog (9), vacuum contactor (13), power transformer (14) and synchrotrans (15).

2, a kind of alternating current soft starter according to claim 1 is characterized in that drive controller (5) is made of the microprocessor of 16 bit.

3, a kind of alternating current soft starter according to claim 1 is characterized in that high-power thyristor (4) is made as 3 groups.