CN2496170Y

CN2496170Y - Reactive compensation component which can be fit in three-phase asychronous motor

Info

Publication number: CN2496170Y
Application number: CN 01228441
Authority: CN
Inventors: 叶孙础
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-05
Filing date: 2001-07-05
Publication date: 2002-06-19
Anticipated expiration: 2011-07-05

Abstract

The utility model discloses a reactive compensation device which can be arranged on a three-phase asynchronous motor. The device is produced by taking the present capacitor as the fundamental mode, to be suitable for an in-situ reactive compensation horizontal type capacitor of the three-phase asynchronous motor, the in-situ reactive compensation horizontal type capacitor is connected with a junction box seat of a motor by passing through a junction plate; the capacitor is connected with the power wire inlet end of the motor in parallel as the capacitive compensation of the reactive load, to reduce the reactive current of the electric transmission line; the voltage and the power factor of the loaded end are improved; and the over compensation of the electric network and the transient phenomena can be reduced because following the compensation of the load change, to reduce the expensive afterwards compensating device of the reactive compensator and the compensation controlling device for improving the electricity using economic efficiency.

Description

Can be installed on the reactive power compensator of threephase asynchronous

The utility model belongs to the energy saving motor technical field, is the device that improves Three-phase Asynchronous Motor Efficiency.

Constantly need electrical equipment also along with variation along with what produce, and the core of electrical equipment is a motor; In recent years interrelated data shows that China's power network accounts for peak load (power consumption) to tool is threephase asynchronous, as everybody knows: these inductive loads are in operation, need from power network, draw perceptual reactive current, set up magnetic field to supply with its stator winding, so the voltage of electrical network is reduced, electric energy loss increases, thereby has hindered the output of active power; People improve power factor (PF) in order to reduce electric energy loss at present; Power capacitor is set as reactive power compensation on grid equipment, reduces electric energy loss, improve the electricity consumption economy.And overcompensation is harmful to, though this compensation makes moderate progress to loss, root problem does not solve; Reactive power compensation should and then change along with load variations, the particularly variation of inductive load, for example: factory's underload or stop work to have a rest and just can cause the undesirable transition effect of people unavoidably.Thereby people have set up in transformer station, electrical network, electric power system, and diversified reactive-load compensator and reactive power compensation control device reduce transition effect.Just at present, people are the electricity consumption economy of monopole asynchronous motor, usually dispatch from the factory and just worn start capapcitor, what have has also worn the operation capacitor, improving the starting performance and the runnability of monopole asynchronous motor, and because the starting performance and the runnability of threephase asynchronous, all good comparatively speaking than single-phase, again because of it be three-phase to wear capacitor cumbersome, not as single-phase easily; Therefore, the habitual threephase asynchronous not charged container that dispatches from the factory, still: the essential reactive current that absorbs of asynchronous motor operation, voltage is reduced, electric energy loss increases, and hinders active power output; Simultaneously also can cause problems such as the undesirable transition effect of people owing to plant produced needs the peak of power consumption and the low ebb that produce.

The purpose of this utility model, provide a kind of reactive power compensator that is installed on threephase asynchronous, it can be installed on the threephase asynchronous as reactive power compensation on the spot, improve power factor, reduce the wastage, reduce the reactive current of transmission line, to reduce reactive-load compensator expensive in the electrical network and reactive power compensation control device, compensating device afterwards.

In order to achieve the above object, the utility model is made the horizontal profile that has fixing hole to compensation condenser, threephase asynchronous reactive power compensation horizontal capacitor device on the spot; And then system a slice one end conforms to the motor capacitor connecting plate with horizontal capacitor device pitch-row size; The fixing hole of capacitor is connected on the connecting plate with screw; The motor capacitor connecting plate, be fixedly connected on the motor wiring cassette holder again; Lead-out wire parallel connection with capacitor connects the motor power end of incoming cables then, as threephase asynchronous reactive-load compensation capacitor on the spot; Wear capacitor, the purpose of reactive power compensation on the spot at random to realize threephase asynchronous.

Owing to adopted such scheme, threephase asynchronous, reactive power compensation have on the spot been realized; Thereby can improve grid supply quality, can reduce the expensive facility of reactive-load compensator and reactive power compensation control device in the electrical network, can improve the power of electric motor factor, reduce the reactive current of transmission line, reduce the wastage,, can make load terminal voltage rising, motor speed and the raising of exerting oneself.

Embodiment further specifies the utility model below in conjunction with accompanying drawing:

Fig. 1: be the utility model, motor capacitor connecting plate (sheet) schematic diagram.

Fig. 2: be the utility model embodiment schematic diagram; A is the utility model rectangle horizontal capacitor device embodiment; B is the utility model round edge flat horizontal capacitor device embodiment.

Fig. 3: be the utility model embodiment, the auxiliary circuit schematic diagram.

Among the figure, 1. fixing hole, 2. motor wiring cassette holder fixing hole; 3. logical line hole; 4. motor capacitor connecting plate cross section; 5. horizontal capacitor device lead-out wire; 6. capacitor holder; 7. capacitor fixing hole; 8. horizontal capacitor device cross section; 9. motor .10. motor wiring plate; U ₁, U ₂, V ₁, V ₂, W ₁, W ₂, be threephase motor winding termination.

In Fig. 1, on the motor capacitor connecting plate, be shaped on fixing hole (1), its effect is to be used for fixing capacitor, and the quantity in its pitch of holes and hole is drafted by the size of capacitor and quantitative structure, and for example usefulness is " three-in-one capacitor " " or multipole plate capacitor ", the quantity in hole can reduce relatively, but can not be less than two holes, generally be two, four, six or three kind of hole, the spacing in hole also is along with the size of capacitor is drafted; Motor wiring cassette holder fixing hole (2) and logical line hole (3) are that basis is wanted assembling motor, and the logical line hole size decision of the logical line of junction box seat fixing hole and terminal box and winding at present with regard to JO ₂Series 0.6 to 100KW motor just has the model of 67 specifications (the terminal box size of some motor is identical) and Y, YX series, so the specification of this connecting plate is many.

Fig. 2 is the utility model, and compensation condenser (capacitor for ac motor) is made the horizontal profile that has fixing hole, threephase asynchronous reactive power compensation horizontal capacitor device on the spot; This horizontal capacitor device is adapted to multiple shell shape; For example: circle, hollow capacitor etc., present embodiment A is the horizontal capacitor device that is useful for rectangle; B is the horizontal capacitor device that is useful for the round edge flat.In the embodiment shown in Fig. 2 A, it is a fundamental mode with present conventional capacitor, rectangle horizontal capacitor device, set up holder (6) and fixing hole (7) thereon, simultaneously its pole plate is pressed common parallel three phase capacitor arrangement (three-in-one capacitor), or use the patent Shen number to be: 99106700.2 " multiple-plate energy-saving capacitor " is applicable to that to make threephase asynchronous is reactive power compensation horizontal capacitor device on the spot; To last, the fixing hole on the motor capacitor connecting plate (1) is connected on the connecting plate with screw, with motor wiring cassette holder fixing hole (2), is fastened on the motor wiring cassette holder, is fixed as one in motor with its capacitor fixing hole (7); Then capacitor lead-out wire (5) parallel connection is connected among Fig. 3 the power inleting terminal (U in the motor wiring plate (10) ₁, V ₁, W ₁) on, as the capacitive compensation of inductive load motor (9), realize that threephase asynchronous wears capacitor, the purpose of reactive power compensation on the spot at random.B is the utility model round edge flat horizontal capacitor device, it is to be fundamental mode with present BGMJ type self-healing low-voltage shunt capacitor (vertical), make its profile horizontal, its fixing hole (7) is arranged in the both sides of round edge, be applicable to that to make threephase asynchronous is reactive power compensation horizontal capacitor device on the spot; Its connected mode is identical with Fig. 2 A, be connected on the threephase asynchronous as reactive power compensation on the spot, realizes that threephase asynchronous wears capacitor, the purpose of reactive power compensation on the spot at random; Because it is a kind of compensation arrangement of following load variations, thus the overcompensation and the transition effect of electrical network can be reduced, to reduce reactive-load compensator expensive in the electrical network and reactive power compensation control device, compensating device afterwards; Improve the power of electric motor factor, reduce the reactive current of transmission line, improve load terminal voltage, and motor speed and exerting oneself; To improve the electricity consumption economy.

Claims

1, a kind of reactive power compensator that is installed on threephase asynchronous, it is made up of capacitor body, pole plate lead-out wire, capacitor holder, capacitor fixing hole etc., it is characterized in that: this device be by, threephase asynchronous reactive power compensation horizontal capacitor device and motor capacitor connecting plate is on the spot formed; Threephase asynchronous is reactive power compensation horizontal capacitor device on the spot, with present capacitor is that fundamental mode is made, it is connected on the motor capacitor connecting plate, the motor capacitor connecting plate, be fastened on the threephase asynchronous junction box seat, threephase asynchronous is the lead-out wire of reactive power compensation horizontal capacitor device on the spot, is and is connected on the threephase asynchronous power inleting terminal.

2, the reactive power compensator that is installed on threephase asynchronous according to claim 1 is characterized in that: described motor capacitor connecting plate is provided with capacitor fixing hole and motor wiring cassette holder fixing hole.