CN102111078A

CN102111078A - Rectifier bridge of automobile AC (alternating current) generator

Info

Publication number: CN102111078A
Application number: CN2011100487432A
Authority: CN
Inventors: 程英伟
Original assignee: JINZHOU HIVRON AUTO ELECTRONICS Co Ltd
Current assignee: JINZHOU HIVRON AUTO ELECTRONICS Co Ltd
Priority date: 2011-03-01
Filing date: 2011-03-01
Publication date: 2011-06-29

Abstract

The invention discloses a rectifier bridge of an automobile AC (alternating current) generator. An MOSFET (metal oxide semiconductor field effect transistor) driving plate and a protective cover are arranged in a mounting groove at one side of a frame; an MOSFET module circuit board and radiating fins are arranged in a mounting groove at the other side of the frame; and the MOSFET module circuit board and the MOSFET driving plate are welded and connected through leads. The rectifier bridge has the advantages that the high-end MOSFET is utilized to replace a diode for converting an AC power supply into a DC (direct current) power supply, the power loss caused by the voltage drop of the diode is reduced, the size of an MOSFET is far less than that of the rectifier diode, the space of the generator is greatly saved, and the output efficiency of the generator is improved by 30% after replacement, therefore, the rectifier bridge has the functions of saving energy and reducing consumption. Meanwhile, the rectifier bridge is arranged in the generator. Compared with the external rectifier bridge, the rectifier bridge disclosed by the invention occupies small inner space of the automobile, and can directly replace the original rectifier bridge without changing the structure of the generator.

Description

The AC generator for vehicle rectifier bridge

Technical field

The present invention is a kind of AC generator for vehicle rectifier bridge, belongs to Vehicle Electronic Control and Tool and Die Technology.

Background technology

At present, nearly all automobile all is to adopt passive diode that the three-phase alternating-current supply that the generator unit stator winding produces is converted to DC power supply, but there are the bigger characteristics of pressure drop in diode, and institute is so that power loss is more, and the volume of diode is bigger.Along with the increase gradually of automotive interior electrical installation, the demand of power supply is also in continuous increase, and the requirement of replacing technology for energy-saving and cost-reducing and chemical fuel is very urgent.

Also have the metal oxide layer semiconductor field-effect transistor to be called for short MOSFET at present abroad and substitute the diode rectification technology, but its volume is bigger, can't be installed on generator inside, is loaded on the generator outside, is connected with generator by lead, it is bigger to take motor space.

Summary of the invention

The object of the invention is to solve above-mentioned existing existing problem, and volume is little, places a kind of AC generator for vehicle rectifier bridge of generator inside.

Technical scheme of the present invention is: MOSFET drive plate and protective cover are installed in the side mounting groove of framework, MOSFET module board, fin are installed in the opposite side mounting groove of framework; The MOSFET module board links to each other by wire bonds with the MOSFET drive plate.

The object of the invention advantage is, use high-end MOSFET to substitute diode AC power is converted to DC power supply, reduced the power loss that diode drop brings greatly, the MOSFET volume is far smaller than rectifier diode, saved the space of generator greatly, the delivery efficiency of replacing the back generator improves 30%, thereby plays the effect of energy-conservation province consumption.

Simultaneously, the present invention is installed on generator inside, compares with the circumscribed rectifier bridge, and it is little to take the automotive interior space, and under the situation that does not change the generator any structure, can directly replace original rectifier bridge.

Description of drawings:

Fig. 1 is a front view of the present invention;

Fig. 2 is a left view of the present invention;

Fig. 3 is the B-B cutaway view of Fig. 2;

Fig. 4 is the MOSFET module board;

Fig. 5 is mounted in the partial sectional view on the generator.

Embodiment

Describe in detail below in conjunction with accompanying drawing, as shown in the figure, metallic conduction sheet 10 is imbedded in the framework 3, the three-phase alternating current that generator unit stator sends is connected with phase place link 7 of the present invention, phase place link 7 links to each other with the MOSFET module 13 of rectifier bridge by metallic conduction sheet 10, reach alternating current is converted to direct current finally by B+ terminal bolt 6 service voltage adjusters, control generator by adjuster and when generate electricity, when do not generate electricity.Are earth terminals 9 with B+ terminal bolt 6 relative those ends on the framework 3, it directly links to each other with the generator metal shell.

Fin 1 and MOSFET module board 2 are installed in the one side mounting groove of framework 3, six MOSFET modules 13 are arranged on the MOSFET module board 2, corresponding 2 of every cross streams electricity, respectively with each mutually metallic conduction sheet 10 be weldingly connected, in order to prevent that MOSFET from burning out because of overheated, the MOSFET module back side scribbles one deck heat conductive silica gel 11, bonding with fin 1, be coated with one deck sealing silica gel 12 at last at framework 3 edges that MOSFET module board 2 one sides are installed, fin 1 correspondence that is stained with MOSFET module board 2 is bonded on the framework 3, be cured to together through behind the high temperature.

MOSFET drive plate 4 and protective cover 5 are installed in the opposite side mounting groove of framework 3, MOSFET drive plate 4 adopts printed circuit board (PCB) (PCB), many electronic devices and components are installed above, MOSFET drive plate 4 and MOSFET module board 28 are weldingly connected by going between, in order to 2 work of driven MOS FET module board.In order to prevent that external environment condition (dust, water, other foreign matters etc.) from entering internal contamination MOSFET drive plate 4, install drive plate after, framework 3 edges be coated with the sealing silica gel 12, protective cover 5 is bonded on the framework 3, make framework 3 inside go into sealing state.

Fin 1 material is an aluminium alloy, and several teeth are arranged, and its purposes is a protection MOSFET module, prevents that MOSFET is overheated and burns out.

MOSFET module board 2 is a ceramic material, above print copper to connecting between the components and parts, every 2 MOSFET13 when in parallel (use 4) that use mutually amount to 6 when in parallel (use 12) realization three phase rectifiers.MOSFET module 2 is used for the three-phase alternating-current supply that the generator unit stator winding produces is converted to DC power supply, and MOSFET module 2 back sides scribble one deck silica gel 11 and are bonded on the fin 1, in order to prevent MOSFET because overheated and burn out.

During assembling generator 14, the present invention is installed to generator inside, generator ' s cover 15 is fixed.

Claims

1. AC generator for vehicle rectifier bridge, it is characterized in that, metal oxide layer semiconductor field-effect transistor (being called for short MOSFET) drive plate and protective cover are installed in the one side mounting groove of framework, MOSFET module board, fin are installed in the opposite side mounting groove of framework; The MOSFET module board links to each other by wire bonds with the MOSFET drive plate.

2. according to the said a kind of AC generator for vehicle rectifier bridge of claim 1, it is characterized in that, the metallic conduction sheet is imbedded in the framework, and the phase place link links to each other with the MOSFET module of rectifier bridge by the metallic conduction sheet, and relative with the B+ terminal bolt on the framework is earth terminal.

3. according to the said a kind of AC generator for vehicle rectifier bridge of claim 1, it is characterized in that, six MOSFET modules are arranged on the MOSFET module board, corresponding of every cross streams electricity, respectively with each mutually the metallic conduction sheet be weldingly connected, the MOSFET module back side scribble one deck heat conductive silica gel and fin bonding, be coated with one deck sealing silica gel in the frame edge that MOSFET module board one side is installed, the fin correspondence that is stained with the MOSFET module board is bonded on the framework, be cured to together through behind the high temperature.

4. according to the said a kind of AC generator for vehicle rectifier bridge of claim 1, it is characterized in that, the MOSFET module board is a ceramic material, connect between top print copper and the components and parts, whenever, use 2 MOSFET modules mutually, use 4 when in parallel, amount to 6, use 12 to realize three phase rectifier when in parallel.