CN201937521U

CN201937521U - Magnetic control and voltage regulation soft starter for high-voltage motor

Info

Publication number: CN201937521U
Application number: CN2011200307219U
Authority: CN
Inventors: 尚勤贵; 崔克泉; 刘光勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-29
Filing date: 2011-01-29
Publication date: 2011-08-17
Anticipated expiration: 2021-01-29

Abstract

The utility model aims to provide a magnetic control and voltage regulation soft starter for a high-voltage motor, which has steady starting, low power consumption, simple structure, low cost and easiness in maintenance. The technical scheme adopted in the utility model is that the soft starter comprises a box body, fixing iron cores and iron core coils, wherein the three square fixing iron cores are not connected with one another, one end of each coil on the fixing iron core is connected with one phase of a three-phase power supply, and the other end of each coil on the fixing iron core is connected with a motor winding; ports are respectively formed on square fixing iron cores with no coil wound thereon; moveable iron core plates are respectively arranged in the ports; rotating shafts are fixed in center holes of the three moveable iron core plates, are rotationally supported in the hole of the box body, and are connected with a drive device outside the box body; and connecting rings made of non-permeability magnetic material are respectively connected with iron cores on two sides of the each port for the square iron core via screws or rivets. The soft starter provided by the utility model is used for starting a motor.

Description

High-voltage motor magnet controlled voltage regulating soft initiator

Technical field:

The utility model relates to a kind of motor starter,, particularly a kind of high-voltage motor magnet controlled voltage regulating soft initiator.

Background technology:

Motor extra-lnigh tension heavy-duty motor is when starting, and electric motor starting the electric current big 5-8 of rated current (generally reach doubly) descends line voltage, influence the normal operation of other electric equipments, and motor is produced thermal shock and electric power is impacted, endanger greatlyyer, influence useful life of motor.Therefore, big-and-middle-sized high-voltage motor is generally adopted soft start, to reduce influence to electrical network.The normal at present soft initiator that adopts mainly contains reactor and single-circuit transformer starter, water resistance and liquid starter, saturable reactor and magnetic control starter, electromagnetic voltage adjusting and switch transformer starter and high-voltage thyristor frequency modulation and voltage modulation starter etc., above-mentioned first kind of starter, in start-up course, start and consume greatly, job stability is relatively poor, and environment has pollution; The three kinds of starters in back all have controllable silicon participation work or the saturated of DC power supply control iron core are arranged, and produce a large amount of high order harmonic components in the start-up course, can cause very big pollution to high-voltage fence, and it are big to make cost, and complex structure is difficult in maintenance.

Summary of the invention:

The purpose of this utility model provides a kind of startup steadily, and meritorious power consumption is few and simple in structure, the low and easy high-voltage motor magnet controlled voltage regulating soft initiator of maintenance of cost.The technical solution of the utility model is, high-voltage motor magnet controlled voltage regulating soft initiator, comprise casing, secured core and iron-core coil, it is characterized in that: an end of the coil on three mutual disjunct hollow secured core bodies is connected with one of three phase mains respectively, the other end is connected with the winding of motor respectively, do not establish at three hollow secured cores and have on the iron-core workpiece of coil flatly, three active iron central layers place respectively in this mouthful, the two ends of this active iron central layer are that the circular arc end face commentaries on classics of the both sides of the mouth on circular arc and the iron-core workpiece is joined, one rotating shaft be fixed in the centre bore of above-mentioned three active iron central layers and rotational support in box body hole, the outer drive unit of this rotating shaft and casing is connected, and three connecting rings of being made by non-magnet_conductible material are connected with the iron-core workpiece of mouthful both sides of three hollow secured cores respectively by screw or rivet.Another technical scheme of the present utility model is, high-voltage motor magnet controlled voltage regulating soft initiator, comprise casing, secured core and iron-core coil, it is characterized in that: described secured core is a day font iron core, one end of the coil on three iron-core workpieces that parallel respectively with three phase mains in one be connected, the other end is connected with motor windings respectively, on two sections iron-core workpieces of not establishing coil, respectively have flatly, two active iron central layers place respectively in these two mouths, the two ends, the left and right sides of this active iron central layer are that the circular arc end face commentaries on classics of the left and right sides of circular arc and described iron core mouth is joined, two rotating shafts are separately fixed in the centre bore of described two active iron central layers, two identical sprocket wheels are separately fixed in two outer described rotating shafts of casing, one rotating shaft is connected with drive unit, and two connecting rings of being made by non-magnet_conductible material are connected with the iron-core workpiece of the mouth both sides of described secured core respectively by screw and rivet.The utility model has compared with the prior art and starts steadily, the power of useful work do not consume substantially and simple in structure, cost is low and the advantage being convenient to safeguard.

Description of drawings:

Fig. 1 is the structural representation of the utility model high-voltage motor magnet controlled voltage regulating soft initiator, and Fig. 2 is the schematic diagram of the another kind of structure of the utility model high-voltage motor magnet controlled voltage regulating soft initiator.

Embodiment:

With the following Examples the utility model is elaborated, principle of the present utility model is, thereby can changes the purpose that reactance realizes stepless voltage regulation and do not have available power consumption by the air gap that changes between secured core and movable core.

Embodiment 1, one end of the coil 2 on three mutual disjunct hollow secured cores 3 respectively with the A of power supply, B, in the C three-phase one is connected, the other end of each coil is connected with motor stator winding respectively, do not establish at each port type iron core and have on the iron-core workpiece of coil flatly, three active iron central layers 6 place the mouth of three secured core bodies respectively, this active iron central layer is the cross section plate identical with the secured core body section, the two ends of plate are that circular arc is changeed mutually with the arcwall face of secured core body mouth and joined, one rotating shaft 4 is fixed in the centre bore of three active iron central layers, said fixing iron core and movable core thereof place the transformer oil in the casing 1, and rotating shaft is stretched in outward outside the casing and is connected with drive unit.Influence the electric motor starting effect for fear of secured core in the iron core iron of opening part distortion dislocation, be provided with connecting ring 5 at opening part, the secured core body of mouth both sides is fused, this connecting ring is that non-magnet_conductible material is made (referring to Fig. 1).

Embodiment 2, secured core 3 in the casing 7 is horizontal day font iron core, on three vertical iron-core workpieces of this secured core, be wound with coil 1, the two ends of each coil are connected with the winding of three phase mains and motor respectively, two sections horizontal iron core bodies between three vertical iron-core workpieces are respectively opened flatly, two active iron central layers are located at respectively in the mouth of above-mentioned horizontal iron core body, the cross section of this active iron central layer is identical with the cross section of secured core, the two ends of this active iron central layer are that the arc-shaped surface of the mouth both sides on circular arc and the secured core body is rotatably assorted, two rotating shafts 2 are separately fixed in the centre bore of above-mentioned active iron central layer, these two rotating shafts difference rotational support are in box body hole, respectively be provided with an identical sprocket wheel 5(in the rotating shaft outside casing referring to Fig. 2), the outer drive unit of a rotating shaft wherein and casing is connected, and is provided with connecting ring 4 at secured core body opening part the both sides secured core body of mouth is linked into an integrated entity.

Method of operation of the present utility model is, for first kind of embodiment, during starter motor, movable core should be in and the corresponding to horizontal level of secured core body, this moment, motor was rotated by static the beginning, rotation along with movable core, angle between movable core and secured core increases, and the air gap between them increases gradually, and reactance diminishes gradually, starting current reduces gradually, and reach the rated value rated speed, and this moment, movable core rotated 90 degree angles, and reactor is switched by high press contacts, voltage on the motor terminal is the rated voltage on the power circuit, starts to finish.Second embodiment is identical with the process and the control principle of first embodiment, the different movable core quantity differences that just drive, and two axles that drive two movable cores rotations guarantee that by identical chain wheel drive two movable cores rotate synchronously.

Claims

1. high-voltage motor magnet controlled voltage regulating soft initiator, comprise casing, secured core and iron-core coil, it is characterized in that: an end of the coil on three mutual disjunct hollow secured core bodies is connected with one of three phase mains respectively, the other end is connected with the winding of motor respectively, do not establish at three hollow secured cores and have on the iron-core workpiece of coil flatly, three active iron central layers place respectively in this mouthful, the two ends of this active iron central layer are that the circular arc end face commentaries on classics of the both sides of the mouth on circular arc and the iron-core workpiece is joined, one rotating shaft be fixed in the centre bore of above-mentioned three active iron central layers and rotational support in box body hole, the outer drive unit of this rotating shaft and casing is connected, and three connecting rings of being made by non-magnet_conductible material are connected with the iron-core workpiece of mouthful both sides of three hollow secured cores respectively by screw or rivet.

2. high-voltage motor magnet controlled voltage regulating soft initiator, comprise casing, secured core and iron-core coil, it is characterized in that: described secured core is a day font iron core, one end of the coil on three iron-core workpieces that parallel respectively with three phase mains in one be connected, the other end is connected with motor windings respectively, on two sections iron-core workpieces of not establishing coil, respectively have flatly, two active iron central layers place respectively in these two mouths, the two ends, the left and right sides of this active iron central layer are that the circular arc end face commentaries on classics of the left and right sides of circular arc and described iron core mouth is joined, two rotating shafts are separately fixed in the centre bore of described two active iron central layers, two identical sprocket wheels are separately fixed in two outer described rotating shafts of casing, one rotating shaft is connected with drive unit, and two connecting rings of being made by non-magnet_conductible material are connected with the iron-core workpiece of the mouth both sides of described secured core respectively by screw and rivet.