CN203691253U

CN203691253U - Device for preventing electrode from burning out caused by point discharge

Info

Publication number: CN203691253U
Application number: CN201320812873.3U
Authority: CN
Inventors: 匡春发; 孙妮娜; 王维坤; 张继忠; 朱叶
Original assignee: AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Current assignee: AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Priority date: 2013-12-10
Filing date: 2013-12-10
Publication date: 2014-07-02
Anticipated expiration: 2023-12-10

Abstract

The utility model relates to a device for preventing an electrode from burning out caused by point discharge, and the structural sketch map of the device is shown in FIG. 1. The device comprises a negative conducting strip (1), a positive conducting strip (2), an insulator (3), a bolt (comprising a flat pad and an elastic pad) (4) and a product shell/supporting seat (5). The positive and negative conducting strips are fixed onto the product shell/supporting seat through the bolt and are insulated from each other through the insulator. Meanwhile, the positive conducting strip is insulated from the product shell/supporting seat and the bolt through the insulator. The positive conducting strip is connected with the anode of a DC power supply, and the negative conducting strip is connected with the cathode of the DC power supply. The above device is simple and reliable in method, easy to realize and obvious in effect.

Description

A kind ofly prevent that point discharge from burning out the device of electrode

Technical field

The utility model belongs to electromagnetic protection technology, is applicable to rectifier bridge and the inverter bridge circuit design of limited space, relates to a kind ofly preventing that point discharge from burning out the device of electrode.

Background technology

For brushless DC generator and the brushless DC motor of war products, due to locus and heavily quantitative limitation, tend to direct current positive and negative electrode stack simultaneously fixing.Distance between positive and negative electrode is very little, easily occurs because of the taper off to a point situation of electric discharge of charge accumulated.In the debug process of initial brushless DC generator, often occur burning out electrode and unknown cause, by carefully analyzing, is that point discharge causes.

Utility model content

The purpose of this utility model: provide a kind of reliability high, the point discharge that prevents easily realizing burns out the device of electrode.

The technical solution of the utility model: a kind ofly prevent that point discharge from burning out the device of electrode, comprise negative bus (1), positive bus (2), insulator (3) and product shell (5); Positive and negative bus (1,2) is fixed on product shell (5) by bolt (4); Positive and negative bus (1,2) is by insulator (3) insulation, positive bus (2) is by insulator (3) and housing (5), bolt (4) insulation, positive bus (2) connects DC power anode, negative bus (1) connects DC power cathode, on positive bus near an angle around, one side of negative bus.

On positive bus, be the most advanced and sophisticated charge accumulated that easily forms of circular that the bolt of fastening negative bus stays, locally produce very high electromotive force, when there was dampness in the air, easily puncture the air electric discharge that tapers off to a point, cause positive and negative bus short circuit and burn out positive and negative bus.Solution is: on positive bus, fall an angle around near one side of negative bus, elimination charge accumulated.

The beneficial effects of the utility model: the utility model has adopted a kind of simple, feasible point discharge that prevents to burn out the method for electrode.The utility model can be widely used in brushless DC generator and brushless DC motor, and the construction cycle is short, cost is low, cost performance is high.

Brief description of the drawings:

Fig. 1 is structural representation of the present utility model, and wherein Fig. 1-a is structural representation, and Fig. 1-b is bolt place enlarged diagram in Fig. 1-a, and Fig. 1-c is positive and negative bus enlarged diagram in Fig. 1-a;

Fig. 2 is brushless DC generator rectifier bridge schematic diagram;

Fig. 3 is brushless DC motor inverter bridge schematic diagram;

Fig. 4 is brushless DC generator rectifier bridge structure chart, and wherein Fig. 4-a is front view, Fig. 4-b be in Fig. 4-a A-A to view;

Fig. 5-a is that the positive and negative line of brushless DC motor power supply stacks figure, Fig. 5-b be in Fig. 5-a A-A to view.

Embodiment

Below by concrete example and in conjunction with Figure of description, the utility model is described in further detail.

Prevent that point discharge from burning out a device for electrode, as shown in Fig. 1-a, comprise negative bus 1, positive bus 2, insulator 3 and product shell 5; Positive and

negative bus

1,2 is fixed on product shell 5 by bolt 4; Positive and

negative bus

1,2 insulate by insulator 3, positive bus 2 insulate by insulator 3 and housing 5, bolt 4, positive bus 2 connects DC power anode, negative bus 1 connects DC power cathode, on positive bus near an angle around, one side of negative bus, as shown in Fig. 1-b, Fig. 1-c.

Example 1, brushless DC generator rectifier bridge, schematic diagram is shown in accompanying drawing 2, structure chart is shown in accompanying drawing 4-a, Fig. 4-b.In accompanying drawing 4, V1 and V2 are power rectifier diode, and the packing forms of power rectifier diode V1 and V2 is identical, but positive and negative electrode is just contrary.Wherein, one end of V1 is connected with negative electricity source plate, and one end of V2 is connected with positive electricity source plate, and the other end of V1 and V2 is connected with three phase windings of generator.Positive and negative power panel is stacked together, and is fixed on the housing of generator, and the air gap between positive and negative power panel is 1.5mm left and right, in positive electricity source plate circular chamfering, prevents charge accumulated.

Example 2, brushless DC motor inverter bridge, schematic diagram is shown in accompanying drawing 3, in positive and negative power line structure see accompanying drawing 5-a, Fig. 5-b.In accompanying drawing 5, positive and negative power line connects respectively the upper and lower bridge in inverter bridge.Positive and negative power line is stacked together, and is fixed on the support of motor, and the air gap between positive and negative power panel is 1mm left and right, in positive power line circular chamfering, prevents charge accumulated.

Through repetition test repeatedly, all there is not burning out the situation of electrode in the product after chamfering.Solve this technical barrier.

Claims

1. prevent that point discharge from burning out a device for electrode, is characterized in that: comprise negative bus (1), positive bus (2), insulator (3) and product shell (5); Positive and negative bus (1,2) is fixed on product shell (5) by bolt (4); Positive and negative bus (1,2) is by insulator (3) insulation, positive bus (2) is by insulator (3) and housing (5), bolt (4) insulation, positive bus (2) connects DC power anode, negative bus (1) connects DC power cathode, on positive bus near an angle around, one side of negative bus.