Circuit arrangement of modular design, in particular for...

Details Circuit arrangement of modular design, in particular for... Circuit arrangement of modular design, in particular for...

1999-09-07

2001-04-17

Nappi, Robert E. (Department: 2837)

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Plural linear-movement motors

C363S065000, C105S049000, C361S729000

Reexamination Certificate

active

06218792

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention is based on a circuit arrangement of modular design, in particular for propulsion of a railroad vehicle, as claimed in the preamble of patent claim
1
.
2. Discussion of Background
A circuit arrangement of the type mentioned initially is described, in particular, in
FIG. 6
of DE 196 30 284 A1. This circuit arrangement comprises n partial converter modules
40
.
1
, . . . ,
40
.n, which are connected in series with one another and have outputs which are connected in parallel with one another. The outputs can be connected to partial converter modules
41
.
1
, . . .
41
.m, each having a traction motor
42
.
1
, . . . ,
42
.m. The partial converter modules
40
.
1
, . . .
40
.n split the relatively high AC voltage between the traction wire
36
and the rail
37
of propulsion for a railroad vehicle corresponding to the number n of converter modules. A low output voltage is produced at the outputs of the partial converter modules
40
.
1
, . . .
40
.n, reduced corresponding to the number of modules n, is, in each case DC-isolated from the input voltage by a transformer
6
(
FIG. 1
) and feeds the traction motors
42
.
1
, . . .
42
.m, via the partial converter modules
43
.
1
, . . .
43
.m. Conversely, when the railroad vehicle is being braked, the traction motors can also feed power into the power supply system via the partial converter module. Since only a low voltage is supplied to each of the partial converter modules, they can be operated in a cost-effective manner using semiconductor switches
11
(
FIG. 1
) having a normal withstand voltage.
SUMMARY OF THE INVENTION
Accordingly, one object of the invention as it is specified in the patent claims is to provide a novel circuit arrangement of the type mentioned initially, which saves as much space as possible.
In the circuit arrangement according to the invention, the modules each have a dielectric material housing which is normally designed in a cuboid shape and the individual housings are arranged close to one another on a mounting board and the power-electronic assemblies are connected to one another via contact arrangements which are passed through adjacent side walls of the housings. The circuit arrangement can thus be accommodated in an extremely spacesaving manner and in a dielectrically safe manner in a flat area, which can advantageously be located under the floor level of a railroad vehicle. Since the individual dielectric material housings are arranged close to one another, since their front, top and bottom surfaces each have an electrically conductive layer which is connected to ground or frame potential, and since the electrical connections of the individual modules are passed through closely adjacent side walls, the entire circuit arrangement is located in a dielectrically well sealed housing which is safe to touch. Since the dielectric material housings of the individual modules are of identical design, they can on the one hand be manufactured particularly cost-effectively and, on the other hand, when required, the modules can be interchanged with one another and can be replaced by a replacement module.


REFERENCES:
patent: 4289997 (1981-09-01), Jung et al.
patent: 5629591 (1997-05-01), Thevenon
patent: 6023137 (2000-02-01), Kumar et al.
patent: 6052293 (2000-04-01), Ivner et al.
patent: 6078173 (2000-06-01), Kumar et al.
patent: 3326948A1 (1985-01-01), None
patent: 8513761 (1989-01-01), None
patent: 9015660 (1991-02-01), None
patent: 19501660A1 (1996-07-01), None
patent: 19630284A1 (1998-01-01), None

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