Electrical connectors – Self aligning contact – Receptacle having two directly opposed contact arms and open...
Reexamination Certificate
2001-07-13
2003-10-07
Field, Lynn (Department: 2839)
Electrical connectors
Self aligning contact
Receptacle having two directly opposed contact arms and open...
C439S212000
Reexamination Certificate
active
06629854
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a structure of wiring connection, and more particularly to a structure of wiring connection applied to plate-like electric wirings called as bus bars.
In internal wirings inside an industrial electric device, in which large currents flow, narrow plate-like wirings (plate-like wirings) called as bus bars are often employed as shown in FIG.
42
.
Generally, in a device like a large-capacity inverter (DC/AC converter) that switches large currents quickly therein, the two bus bars that flow currents of equal magnitude and of opposite directions to each other are structured in layers and in parallel to be closer as possible, like a bus bar
101
and a bus bar
102
in
FIG. 42
, which is one of ordinary-seen example of such bus bar formations. With such a structure, magnetic fields created by currents of opposite directions reduce each other, so that the inductance in the entire structure becomes lower than that of other bus bar formations.
SUMMARY OF THE INVENTION
By the way, in case that the pair of bus bars inside an electric device has to connect with external wirings to send or receive current, each bus bar has to have a “connecting portion” for it. Suppose the bus bar
101
and the bus bar
102
in
FIG. 42
were internal wirings, a bus bar
111
and a bus bar
112
are to be the external ones. The bus bar
101
is to connect with the bus bar
111
, and the bus bar
102
is to connect with the bus bar
112
. The external wirings should have the same or similar structures and formation as those of the internal wirings, if reduction of inductance in an entire electric circuit is intended. And connection of these bus bars should be carried out by, for instance, fastening with bolts and nuts considering ease of assembly and maintenance. Consequently, a hole for the fastening is made in each of the connecting portions of the bus bars
101
,
102
,
111
and
112
. And not to interfere the two bolts each other and not to interfere one bolt and a fastening tool when another bolt is fastening, the structure of the connecting portions has to be such that as shown in FIG.
42
. Therefore, the partial inductance of this connecting portion becomes far larger than that at the other portion of bus bar pair formation, because the bus bar at the connecting portion cannot be so constructed to be near each other.
The present invention has been achieved through such consideration and an object of the invention is to provide a structure of wiring connection capable of suppressing an increase of inductance effectively.
To achieve the above object, according to one aspect of the present invention, a structure of wiring connection has: a first wiring that extends as a narrow plate having two main faces and having a predetermined plate width, and provided with a main portion, at least one connecting portion and an elbow portion defined as a portion between the main portion and the connecting portion thereof; a second wiring that extends as a narrow plate having two main faces and having a predetermined plate width, and provided with a main portion, at least one connecting portion and an elbow portion defined as a portion between the main portion and the connecting portion thereof; a third wiring that extends as a narrow plate having two main faces and having a predetermined plate width, and provided with a main portion, at least one connecting portion and an elbow portion defined as a portion between the main portion and the connecting portion thereof, the connecting portion of the first wiring and the connecting portion of the third wiring being in contact with each other through a predetermined area; and a fourth wiring that extends as a narrow plate having two main faces and having a predetermined width, and provided with a main portion, at least one connecting portion and an elbow portion defined as a portion between the main portion and the connecting portion thereof, the connecting portion of the second wiring and the connecting portion of the fourth wiring being in contact with each other through a predetermined area. Between any one of the first wiring to the fourth wiring and one of the other wirings, a specific distance defined as a distance between gravity centers in sections of two corresponding wirings of the first wiring to the fourth wiring cut along a plane vertical to each main face of the two corresponding wirings is less than the predetermined plate width of each of the two corresponding wirings. The main portion of the first wiring and the main portion of the second wiring run together in parallel facing each one of main faces thereof, and the main portion of the third wiring and the main portion of the fourth wiring run together in parallel facing each one of main faces thereof.
In such a structure, it is preferable that each predetermined plate width of the first wiring to the fourth wiring is the same width.
In such a structure, it is preferable that the elbow portion of the first wiring and that of the third wiring are in contact with each other, and the elbow portion of the second wiring and that of the fourth wiring are in contact with each other.
In such a structure, it is preferable that the elbow portion of the first wiring and that of the third wiring are in contact with each other to be sandwiched between the elbow portion of the second wiring and that of the fourth wiring.
In such a structure, it is preferable that a part of the elbow portion of the first wiring and that of the third wiring are in contact with each other, and another part of the elbow portion of the first wiring is sandwiched between the elbow portion of the second wiring and that of the fourth wiring.
In such a structure, it is preferable that each connecting portion of the first wiring to the fourth wiring is detachable from a corresponding connecting portion thereof.
According to another aspect of the present invention, a structure of wiring connection has: a first wiring that extends as a narrow plate having two main faces and having a predetermined plate width, and provided with a main portion, at least one connecting portion and an elbow portion defined as a portion between the main portion and the connecting portion thereof; a second wiring that extends as a narrow plate having two main faces and having a predetermined plate width, and provided with a main portion, at least one connecting portion and an elbow portion defined as a portion between the main portion and the connecting portion thereof; a third wiring that extends as a narrow plate having two main faces and having a predetermined plate width, and provided with a main portion, at least one connecting portion and an elbow portion defined as a portion between the main portion and the connecting portion thereof; a fourth wiring that extends as a narrow plate having two main faces and having a predetermined plate width, and provided with a main portion, at least one connecting portion and an elbow portion defined as a portion between the main portion and the connecting portion thereof, the connecting portion of the first wiring and the connecting portion of the fourth wiring being in contact with each other through a predetermined area; a fifth wiring that extends as a narrow plate having two main faces and having a predetermined width, and provided with a main portion, at least one connecting portion and an elbow portion defined as a portion between the main portion and the connecting portion thereof, the connecting portion of the second wiring and the connecting portion of the fifth wiring being in contact with each other through a predetermined area; and a sixth wiring that extends as a narrow plate having two main faces and having a predetermined width, and provided with a main portion, at least one connecting portion and an elbow portion defined as a portion between the main portion and the connecting portion thereof, the connecting portion of the third wiring and the connecting portion of the sixth wiring being in contact with each other through a predetermined area. Betw
Field Lynn
Hyeon Hae Moon
McDermott & Will & Emery
Nissan Motor Co,. Ltd.
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