CN203351390U

CN203351390U - Mechanical-adjusting adjustable reactor

Info

Publication number: CN203351390U
Application number: CN 201320397687
Authority: CN
Inventors: 罗文周; 胡益胜
Original assignee: WUHAN VOLTEK ELECTRICAL ENGINEERING Co Ltd
Current assignee: WUHAN VOLTEK ELECTRICAL ENGINEERING Co Ltd
Priority date: 2013-07-05
Filing date: 2013-07-05
Publication date: 2013-12-18
Anticipated expiration: 2023-07-05

Abstract

The utility model provides a mechanical-adjusting adjustable reactor comprises an iron core and coils. An upper yoke of the iron core corresponding to two windows is provided with two openings, cutting off the iron core, in an inverted equilateral triangle shape, a movable iron core arranged at the openings in the inverted equilateral triangle shape matches with the openings in angles, the upper portion of the movable iron core is provided with a clamping device to clamp the movable iron core for assembling. The iron core is in a B shape; the openings in the inverted equilateral triangle shape are symmetrically arranged on the upper yoke of the iron core corresponding to the iron core windows and divide the upper yoke of the iron core into three segments. The movable iron core comprises two corresponding parts correspond to the openings in the inverted equilateral triangle shape, and the upper portions of the two parts are clamped through the clamping device for assembling. The clamping device of the upper portion of the movable iron core is connected to a hydraulic device, the movable core can move up and down corresponding to the iron core, so that air gaps between the iron cores can be changed. By the aid of the mechanical-adjusting adjustable reactor, filtering precision of a filter can be adjusted automatically on line, and operation efficiency of the filter can be improved.

Description

The mechanical conditioning type Regulatable reactor

Technical field

The utility model relates to a kind of mechanical conditioning type Regulatable reactor, for the electrical network passive filters system.Can Automatic Online adjusting the filtering accuracy of filter, significantly improve the operating efficiency of filter.Belong to electrical network filtering and quality of power supply technical field.

Background technology

Reactor is a kind of inductance element, and its inductance is utilized and is called reactor by electric power system.Pass in the reactor winding with inductance L and exchange I _lthe time, it just presents reactance X _l(X _land produce voltage drop U at the reactor two ends=2 π fL), _l.Reactor mainly forms by coil with the iron core of air gap, and its characteristic of magnetization is linear basically, therefore the inductance value of iron core reactor does not depend on external voltage and current, and depends on the physical dimension of the number of turn of self coil and coil, iron core, air gap.

If the number of turn of reactor winding is W ₁, the electric current passed through is I ₁, coil magnetic potential and ampere-turn are I ₁w ₁, the main flux that this magnetic potential produces in iron core is:

Φm=I ₁W ₁g

The inductance that main flux produces is:

L=1.257W ₁ ²S/nδX10 ⁶

In formula: the magnetic conductance of g-magnetic circuit (H)

The magnetic surface that S-magnetic flux is crossed amasss (M ²)

N-air gap number

δ-air gap height (M)

From above formula, can find out: change the air gap of iron core or the inductance that number can effectively change reactor.

Due to iron core and coil, after factory manufactures completion, its parameter is immutable, just can change inductance owing to changing air gap, and the variation of inductance makes reactor induction reactance X _lalso change.

X _L=2πfL

In formula: X _l-induction reactance (Ω)

L-inductance (H)

F-mains frequency (HZ)

Utilize the characteristic of reactor, it and capacitor series, form the LC loop, be attempted by electrical network, be adjusted to the effect that certain tuning point (just in time, with the same point of filtered high order harmonic component, now this circuit reactance is minimum) just can play filtering.The operation principle of Here it is traditional passive filter.But traditional passive filter is because the inductance of reactor can not be regulated, and capacitor (domestic general 1～3 year) in use for some time, appearance value C can descend, capacitive reactance X _cincrease condenser capacity Q _calso reduce, the passive filter filtering accuracy descends thereupon, and efficiency efficiency is had a greatly reduced quality.

X _C=1/2πfC;

Q _C=U ²/X _C

In formula: X _c-capacitive reactance

C-electric capacity (F)

QC-condenser capacity (Kvar)

U-capacitor rated voltage (V)

For example: the frequency of quintuple harmonics is 250HZ, and in the LC loop, induction reactance equals 4% capacitive reactance, that is:

X _L=4%X _C

; Resonance frequency:

If capacitor in use for some time, capacitor's capacity descends 20%, and capacitive reactance rises 20%, and resonance frequency at this moment is: FO=50Xc=274 (HZ)

As can be seen from the above equation, filter resonance frequency at this moment is because off-resonance point is too far away, and filter effect is very poor.

Summary of the invention

The purpose of this utility model is to overcome the deficiency that above-mentioned traditional passive filter exists, and a kind of mechanical conditioning type Regulatable reactor is provided, and it is simple in structure, by closed-loop control, can change fast the reactor air gap, thereby changes reactor inductance, induction reactance X _lbe changed.Can Automatic Online adjusting the filtering accuracy of filter, significantly improve the operating efficiency of filter, and performance is good, reliability is high, long service life.

The technical solution adopted in the utility model is: mechanical conditioning type Regulatable reactor of the present utility model comprises iron core and coil, there is the opening of falling the equilateral triangle that upper yoke is cut off at the corresponding core window of iron core upper yoke place, the drift angle that is equilateral triangle just cuts off the upper yoke bottom downwards, and upper yoke top is the equilateral triangle base; At the opening part of falling the equilateral triangle, the moving iron core of angle automatching is with it arranged, moving iron core top is by being that clamping device will move iron core and clamp assembling.

The clamping device on described moving iron core top is connected with hydraulic means, and moving iron core can move up and down with respect to iron core, thereby changes the air gap of moving iron core and iron core.

Described iron core is a day font iron core, and the opening of falling the equilateral triangle has two, is arranged symmetrically in two core window places that the iron core upper yoke is corresponding, and the iron core upper yoke is divided into to three sections; Move iron core by corresponding two parts, respectively corresponding two openings of falling the equilateral triangle, two parts top all clamps assembling by clamping device.

The beneficial effects of the utility model are: 1,, by mechanical adjustment, the reactor air gap can be adjusted in good time online; 2, the variation of capacity of capacitor bank on filter effect without impact; 3, the variation of tracking filter resonance point fast; 4, applied widely, can replace the existing not good passive filtration unit of filter effect.The utility model is for the electrical network passive filters system, and filtering accuracy that can the Automatic Online adjusting filter significantly improves the operating efficiency of filter.

The accompanying drawing explanation

Fig. 1 the utility model example structure schematic diagram.

Fig. 2 Regulatable reactor fundamental diagram.

Embodiment

Below in conjunction with accompanying drawing, 1 couple of embodiment of the present utility model further describes.

A kind of mechanical conditioning type Regulatable reactor of the present utility model comprises iron core 1 and coil 2, there is the opening of falling the equilateral triangle 3 that upper yoke is cut off at the corresponding core window of iron core upper yoke place, the drift angle that is equilateral triangle just cuts off the upper yoke bottom downwards, and upper yoke top is the equilateral triangle base; The moving iron core 4 of angle automatching is with it arranged at the opening of falling the equilateral triangle 3 places, and moving iron core 4 tops are that clamping device 5 will move iron core 4 clamping assemblings.

The clamping device 5 on described moving iron core 4 tops is connected with hydraulic means 6, moves iron core 4 with respect to iron core 1 and can move up and down, thereby changing the air gap that moves iron core 4 and iron core 1.

Described iron core 1 is a day font iron core, and the opening of falling the equilateral triangle 3 has two, is arranged symmetrically in two core window places that the iron core upper yoke is corresponding, and the iron core upper yoke is divided into to three sections; Move iron core 4 by corresponding two parts, respectively corresponding two openings of falling the equilateral triangle 3, two parts top all clamps assembling by clamping device 5.Two parts insulation that clamping device 5 is corresponding with moving iron core 4.

Fig. 2 Regulatable reactor fundamental diagram:

This mechanical conditioning type Regulatable reactor KL and the several monolithic capacitor parallel connections of capacitor group C(, form the capacitor group) be serially connected, be attempted by the frequency converter that accesses in nonlinear load FZ(electrical network, frequency heating device, laser welding, variable-frequency motor, direct current machine, DC power supply, plating electrolysis installation, battery charger etc.) electrical network T in.Voltage check device HL is installed in the loop of Regulatable reactor KL and detects in real time reactor voltage, because induction reactance (XL=UL/IL) and voltage are directly proportional, the variation of voltage means that variation has occurred reactance Rate.Voltage check device passes to computing controller to the information of change in voltage, this controller is after computational analysis, send instructions to hydraulic means, hydraulic means moves up and down, adjust the air gap of moving iron core 4 and iron core 1, make the inductance of reactor KL adjusted online, thereby guaranteed the filtering accuracy of filter.

Traditional reactor is using scene, and its Specifeca tion speeification is immutable.That be because reactor after factory manufactures, because core section, coil turn, iron core column air gap etc. are definite, therefore XL is immutable for reactor induction reactance value, UL is substantially constant in its reactor pressure drop, voltage on the capacitor group terminal of series connection is certain with it, if but condenser capacity capacitive reactance XC increase, its value will diminish, passive filter is except the filtering accuracy variation, and its filter capacity also reduces.

Mechanical conditioning type Regulatable reactor of the present utility model makes passive filter filtering accuracy and filtration efficiency greatly improve, and this precision and efficiency are not changed by condenser capacity and reduces, and with conventional filter, compare, and it has incomparable huge advantage.

Claims

1. a mechanical conditioning type Regulatable reactor, comprise iron core (1) and coil (2), it is characterized in that: there is the opening of falling the equilateral triangle (3) that upper yoke is cut off at the corresponding core window of iron core upper yoke place, the drift angle that is equilateral triangle just cuts off the upper yoke bottom downwards, and upper yoke top is the equilateral triangle base; Locate the moving iron core (4) of angle automatching with it at the opening of falling the equilateral triangle (3), moving iron core (4) top will be moved iron core (4) by clamping device (5) and clamp assembling.

2. mechanical conditioning type Regulatable reactor according to claim 1, it is characterized in that: the clamping device (5) on moving iron core (4) top is connected with hydraulic means (6), moving iron core (4) can move up and down with respect to iron core (1), thereby changes the air gap of moving iron core (4) and iron core (1).

3. mechanical conditioning type Regulatable reactor according to claim 1 and 2, it is characterized in that: iron core (1) is a day font iron core, the opening of falling the equilateral triangle (3) has two, is arranged symmetrically in two core window places that the iron core upper yoke is corresponding, and the iron core upper yoke is divided into to three sections; Move iron core (4) by corresponding two parts, respectively corresponding two openings of falling the equilateral triangle (3), two parts top all clamps assembling by clamping device (5).