CN201197100Y - AC Power generator - Google Patents

Abstract

The utility model relates to an alternator which comprises a rear end cover, a protecting hood and a rectification component; the rectification component comprises a polar plate and a commutation diode positioned on the polar plate; and the alternator also comprises heat conducting insulation paper positioned between the rear end cover and the polar plate. The rear end cover, the heat conducting insulation paper and the polar plate are closely combined, thereby improving the stability of the structure and the radiating efficiency, reducing the requirements on the temperature resistant performance of the commutation diode, solving the problem of the overhigh temperature of the rectification component of a double-wire system inner-cooled motor and reducing the failure rate of the motor.

Description

A kind of alternating current generator

Technical field

The utility model relates to a kind of alternating current generator, relates in particular to a kind of double wire system alternating current generator of automobile.

Background technology

The rectifier stack of existing double wire system alternating current generator comprises insulation cushion 51 as shown in Figure 1, pole plate 52, rectifier diode 53, bracket component 54.Alternating current generator is initial, and what produce is three-phase alternating current (stator copper), carry out rectification by the rectifier diode on the rectifier stack 53, the copper cash that is comprised in the bracket component 54 plays the effect that connects corresponding rectifier diode 53 and stator output line, definitely insulation between the copper cash.Because this type of alternating current generator is to belong to the double wire system motor, thus pole plate 52 will and rear end cap (motor body) insulation.In the prior art, the insulation cushion 51 by projection fills up pole plate 52, and the mode that makes itself and rear end be stamped certain distance insulate.Heat is taken in the main heat conduction by pole plate 52 of heat radiation out of in the prior art.

Problems of the prior art comprise: rear end cap all parts backward all are in vacant state, are fixed on the rear end cap by insulation cushion 51, and structural stability is descended; Have the space between rear end cap and the rectifier stack, the degree of protection of alternating current generator is descended; The heat that rectifier diode 53 produces can only dispel the heat by pole plate 52, and pole plate 52 areas of left and right sides version are limited, thereby area of dissipation is restricted, and makes rectifier diode 53 heat radiation difficulties.

The utility model content

For addressing the above problem, the utility model discloses a kind of alternating current generator, can improve structural stability, and improve radiating efficiency.

The utility model discloses a kind of alternating current generator, comprise rear end cap, guard shield and rectifier stack, described rectifier stack comprises pole plate and the rectifier diode that is positioned on the described pole plate, and described alternating current generator also comprises the heat conductive insulating paper that is positioned between described rear end cap and described pole plate.

Described pole plate has the heat radiation grid that are positioned between described rectifier diode.

Described guard shield has the wind-tunnel that is positioned at described heat radiation grid top.

Described heat conductive insulating trimming edge is positioned at outside the described pole plate edge.

Described rear end cap have shape with the size with the identical projection of described heat conductive insulating paper, described heat conductive insulating paper is positioned on the described projection;

Described guard shield bottom margin has the stepped ramp type seam, and described seam has seam bottom surface and seam sidewall, and described seam bottom surface is positioned on the part of described heat conductive insulating paper outside described pole plate edge, and described seam inside surface of side wall is positioned on the sidewall of described projection.

The beneficial effects of the utility model are, improve the radiating efficiency of rectifier diode on the rectifier stack, thereby guarantee the rectifier stack operate as normal, reduce requirement the rectifier diode heat resistance, solve the too high problem of rectifier stack temperature of double wire system inner-cooled machine, reduced the failure rate of motor.

Description of drawings

Fig. 1 is a rectifier stack in the prior art;

Fig. 2 is an alternating current generator of the present utility model;

Fig. 3 a is a rectifier stack front view of the present utility model, and Fig. 3 b is a rectifier stack rearview of the present utility model, and Fig. 3 c is a rectifier stack stereogram of the present utility model;

Fig. 4 a said positive-pole plate structure front view and stereogram, Fig. 4 b are anode plate front view and stereogram;

Fig. 5 is the stereogram of guard shield of the present utility model;

Fig. 6 is the stereogram of rear end cap of the present utility model;

Fig. 7 is the front view after the utility model assembling.

Wherein, Reference numeral,

51: the insulation cushion of existing rectifier stack; 52: the pole plate of existing rectifier stack; 53: the rectifier diode of existing rectifier stack; 54: the bracket component of existing rectifier stack;

1: rear end cap; 2: heat conductive insulating paper; 3: rectifier stack; 4: guard shield;

11: projection; 111: sidewall;

31: anodal rectifier diode; 32: the negative pole rectifier diode; 33: positive plate; 34: negative plate; 35: bracket component; 36: anodal output bolt; 37: negative pole output bolt; 331: positive plate heat radiation grid; 341: negative plate heat radiation grid;

411: the seam bottom surface; 412: the seam sidewall; 42: wind-tunnel.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Alternator construction of the present utility model comprises as shown in Figure 2: rear end cap 1, heat conductive insulating paper 2, rectifier stack 3 and guard shield 4.Heat conductive insulating paper 2 single faces have glue, can be attached on the pole plate of rear end cap 1 or rectifier stack 3.In the present embodiment, heat conductive insulating paper 2 shapes are identical with the pole plate of rectifier stack 3, and heat conductive insulating paper 2 edges go out pole plate edge setpoint distance greatly, and this setpoint distance is 1.5 millimeters in the present embodiment, to prevent failure of insulation.Rear end cap 1 has shape and size with the identical projection 11 of heat conductive insulating paper 2, and as shown in Figure 6, heat conductive insulating paper 2 is sturdy on projection 11.Heat conduction at high temperature of above-mentioned heat conductive insulating paper 2 and insulation.Rectifier stack 3 pole plates are positioned on the heat conductive insulating paper 2, and heat conductive insulating paper 2 plays insulating effect at rectifier stack 3 and 1 of rear end cap.Guard shield 4 is covered, and guard shield 4 bottom margins have seam, and as shown in Figure 5, seam is a stepped ramp type, have seam bottom surface 411 and seam sidewall 412.Seam bottom surface 411 is positioned on the part of heat conductive insulating paper 2 outside the pole plate edge, and seam sidewall 412 inner surfaces are positioned on the sidewall 111 of projection 11.Use screw guard shield 4 is fixed on the rear end cap 1, prevent owing to outside foreign material enter the failure of insulation that causes.

Rectifier stack 3 structures are shown in Fig. 3 a-3c, comprise pole plate, rectifier diode, bracket component 35, anodal output bolt 36 and negative pole output bolt 37, rectifier diode comprises anodal rectifier diode 31 and negative pole rectifier diode 32, and pole plate comprises positive plate 33 and negative plate 34.Wherein, rectifier diode is fitted on the pole plate, connects to form commutation system with the copper cash in the bracket component 35, and anodal output bolt 36 and negative pole output bolt 37 also are housed on the pole plate, draws the positive pole and the negative pole of alternating current generator respectively.

Pole plate has the grid type heat radiation grid that are positioned between rectifier diode, shown in Fig. 4 a and Fig. 4 b, has the positive plate heat radiation grid 331 that are positioned at 31 of anodal rectifier diodes on the positive plate, has the negative plate heat radiation grid 341 that are positioned at 32 of negative pole rectifier diodes on the negative plate.

Guard shield 4 has the wind-tunnel 42 that is positioned at described heat radiation grid top, as shown in Figure 7, each corresponding wind-tunnel 42 in heat radiation grid top, wind-tunnel 42 shapes are identical with the heat radiation grid, make the cold air that sucks from guard shield 4, can directly blow on the heat radiation grid, quicken the heat dissipation on the heat radiation grid, thereby guarantee the working temperature of rectifier diode.

The concrete heat radiation process of rectifier diode is, rectifier diode is because the heat process pole plate conduction that rectifier produces, part arrives the heat radiation grid, wherein a part reaches on the rear end cap 1 through heat conductive insulating paper 2 and directly dissipates, wherein another part is because the cold wind that the rotation of fan produces on the rotor enters inside through the wind-tunnel 42 of guard shield 4, directly blow on the heat radiation grid, heat is taken away.

Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite spirit and scope of the present utility model of claims.Therefore scope of the present utility model is not limited in above explanation, but determine by the scope of claims.

Claims (5)

1. alternating current generator, comprise rear end cap, guard shield and rectifier stack, described rectifier stack comprises pole plate and the rectifier diode that is positioned on the described pole plate, it is characterized in that described alternating current generator also comprises the heat conductive insulating paper that is positioned between described rear end cap and described pole plate.

2. alternating current generator as claimed in claim 1 is characterized in that, described pole plate has the heat radiation grid that are positioned between described rectifier diode.

3. alternating current generator as claimed in claim 2 is characterized in that, described guard shield has the wind-tunnel that is positioned at described heat radiation grid top.

4. as claim 1,2 or 3 described alternating current generators, it is characterized in that described heat conductive insulating trimming edge is positioned at outside the described pole plate edge.

5. alternating current generator as claimed in claim 4 is characterized in that,

Described rear end cap have shape with the size with the identical projection of described heat conductive insulating paper, described heat conductive insulating paper is positioned on the described projection;

Described guard shield bottom margin has the stepped ramp type seam, and described seam has seam bottom surface and seam sidewall, and described seam bottom surface is positioned on the part of described heat conductive insulating paper outside described pole plate edge, and described seam inside surface of side wall is positioned on the sidewall of described projection.

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