Patent Application
20060268590
1. Field of the Invention
The present invention relates to a rectifier diode of electric generator and, more particularly, to a rectifier diode disposed in an automobile electric generator to rectify an AC power to a DC power and especially applicable to vehicles with violent vibrations such as heavy-duty vehicles.
2. Description of Related Art
A rectifier diode or an embedded type package of power semiconductor device indicates a diode rectifier embedded in a car or used in the industry. The rectifier diode is usually disposed in an electric generator to convert an AC power to a DC power. Because the rectifier diode is located on a high-temperature electric generator, its internal structure needs to have a high stability. Besides, because the rectifier diode is tightly embedded in a rectifier, it needs to endure a very large pressure when embedded into the rectifier.
The applicant of the present invention has proposed a related disclosure of U.S. Pat. No. 6,455,929B1 titled “embedded type package of power semiconductor device” published in Sep. 24, 2002, wherein an embedded type package of power semiconductor device is provided. This embedded type package of power semiconductor device won't crack when embedded, hence preventing the semiconductor chip from being incorrectly assembled into a cup. Moreover, a good heatsink structure is accomplished.
Although the above disclosure really has a good effect, it is found that crack of the lead of the rectifier diode may arise when it is assembled in a vehicle with violent vibrations such as a heavy-duty vehicle, hence causing bad electric connection in an electric generator.
As shown in
Although the above rectifier diode has a firm assembly, the vibrating force may be transmitted into the rectifier diode 20a via the rigid lead 22a when used in a vehicle with violent vibrations, hence causing bad electric connection of internal devices or even crack of the lead 22a.
An object of the present invention is to provide a rectifier diode of electric generator applicable to electric generators with violent vibrations. Crack of the lead can be avoided to ensure good electric connection in the rectifier diode and also enhance the stability of operation of an electric generator.
Another object of the present invention is to provide a rectifier diode of electric generator, whose external conducting portion has flexibility to bear violent vibrations.
Yet another object of the present invention is to provide a rectifier diode of electric generator to improve its external conducting portion for simplifying the connection procedures with the outside.
To achieve the above objects, the present invention provides a rectifier diode of electric generator applicable to electric generators with violent vibrations. The rectifier diode of electric generator comprises a main body, a conducting fixing component, a flexible conducting wire, and a connection component. The main body has a cup and a lead. A semiconductor device is disposed in the cup. The lead is electrically connected to the semiconductor device and protrudes outwards. The conducting fixing component is connected to the lead. The flexible conducting wire is connected to the fixing component. The connecting component is connected to a distal end of the flexible conducting wire.
Because the flexible conducting wire matches the fixing component and the connecting component, violent vibrations can be endured to ensure good electric connection in the rectifier diode and also enhance the stability of operation of an electric generator. Moreover, the design of the connecting component can simplify the connection procedures with the outside.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:
As shown in
The main body 10 has a cup 12 and a lead 16. A semiconductor device (not shown) is disposed in the cup 12. The lead 16 is electrically connected to the semiconductor device and protrudes outwards. A plurality of grooves 122 is provided around the cup 12 to enhance the fixing force of embedding. The lead 16 and the semiconductor device are fixed in the cup 12 by insulating gel 14. The fixing component 12 is made of material of good conductivity, and is connected to the lead 16. The flexible conducting wire 30 is connected to the fixing component 20. The connecting component 40 is connected to the distal end of the flexible conducting wire 30 for connection with an external device.
The fixing component 20 is made of a metal sheet, and is folded along a fold line 22 to clamp the lead 16 and the flexible conducting wire 30. In a preferred embodiment of the present invention, the fixing component 20 is made of copper material and plated with nickel alloy. The copper material has a good conductivity. Because the rectifier diode 100 is usually used in a high-temperature environment, the fixing component 20 of copper material is electroplated with nickel alloy to avoid oxidation.
In this preferred embodiment of the present invention, the connecting component 40 is also made of a metal sheet, and has a fixing portion 42 and an extended portion 44 extending outwards from the fixing component 42. The fixing portion 42 is a rectangular sheet, and is folded along a fold line 422 to clamp the distal end of the flexible conducting wire 30. The connecting component 40 is preferably to be made of copper material and electroplated with nickel alloy and avoid oxidation.
As shown in
The flexible conducting wire 30 is preferably to be a copper braid lead formed by braiding several thin wires. For example, the number of thin copper wires of the flexible conducting wire 30 can reach about 800. A copper braid lead has a good conductivity. A braid lead with several thin wires has a better flexibility and won't crack easily. The flexible conducting wire 30 is further electroplated with nickel alloy to avoid oxidation.
The extended portion 44 of the connecting component 40 is a screwable metal sheet. Speaking more specifically, the extended portion 44 is a ring-shaped metal sheet. The extended portion 44 can thus be conveniently screwed to a conducting bolt with a nut.
As shown in
As shown in
The fixing portion 42 of the connecting component 40 is preferably to be welded to the flexible conducting wire 30. A welded position 420 (shown in
20 degrees.
In order to protect the flexible conducting wire 30, the fixing portion 42 of the connecting component 40 is connected to one end of the flexible conducting wire 30 to form an outward opening 46. The opening 46 is bent to be of an arc shape, i.e., the opening 46 forms an upper bevel edge 462 and a lower bevel edge 464.
The other end of the connecting component 40 is an open end 48. An upper bevel edge 482 is also formed above the open end 48.
As shown in
The present invention has the following features and functions.
Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.
