Electricity: motive power systems – Armature circuit control – By armature or primary circuit-making and/or breaking
Reexamination Certificate
2000-06-19
2001-10-16
Ro, Bentsu (Department: 2832)
Electricity: motive power systems
Armature circuit control
By armature or primary circuit-making and/or breaking
C307S127000, C307S143000
Reexamination Certificate
active
06304049
ABSTRACT:
The present invention relates to a multipolar electromagnetic switching module that is connected by line connections to a main multipolar electromagnetic switching device and by load connections to at least one motor and having between said connections several power current lines fitted with switching poles the contacts of which are always alternately closed, and controlled by a switching electromagnet driven by an electric control circuit.
The construction of motor control circuits consisting of reverser, star-delta starter, speed-changing mechanism, etc. is known by combining several devices (contactors, etc.) whose power supplies and control systems are interconnected to create the desired circuit. But this type of system is bulky.
French patents FR 2,758,903 and FR 2,761,521 disclose a reverser-type module capable of switching a motor from forward to reverse operation and vice-versa. This module is also bulky.
The aim of the present invention is to achieve a switching module capable of providing integrated motor control (reversing operating direction, star-delta start-up, etc.) of reduced width, i.e. more or less the same as the width of the contactor or standard electrical device with which it is paired to perform the said function. The module is thus of reduced width. It is also protected by the main device that is associated with it and connected upstream.
The switching module of the invention is characterized in that the poles and power lines are arranged to effect a motor control function such that the reversing, star-delta start-up and distribution functions are controlled and such that the pole control assembly consisting of the switching electromagnet and the electric control circuit is offset relative to the switching poles and load paths in a direction perpendicular to the rear fastening surface of the module such that the width of the module is reduced and more or less identical to that of the main device associated with it.
REFERENCES:
patent: 4803587 (1989-02-01), Fournier et al.
patent: 4937403 (1990-06-01), Minoura et al.
patent: 4994725 (1991-02-01), Gschlossl
patent: 5481073 (1996-01-01), Singer et al.
patent: 88 01 792 (1988-04-01), None
patent: 2 758 903 (1998-07-01), None
Fournier Bernard
Romillon Jean-Marc
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ro Bentsu
Schneider Electric Industries SA
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