Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control
Reexamination Certificate
2006-04-27
2008-08-05
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Reciprocating or oscillating motor
Energizing winding circuit control
C318S254100, C318S434000, C363S023000, C363S030000, C363S093000
Reexamination Certificate
active
07408311
ABSTRACT:
A protection device protects a driving device of an electric motor with at least three phases and at least three windings and the driving device comprises a power stage suitable for driving directly said at least three windings. The driving device is suitable for actuating a motor brake operating phase and comprises detectors suitable for detecting the currents that run in the windings of the motor. The protection device comprises selectors suitable for selecting the currents having a single direction between said detected currents and a deactuator suitable for deactuating the power stage during said motor brake operating phase when the sum of the currents having a single direction is greater than a reference current.
REFERENCES:
patent: 4404478 (1983-09-01), Rischmuller
patent: 4654568 (1987-03-01), Mansmann
patent: 5495154 (1996-02-01), Carobolante
patent: 5939863 (1999-08-01), Miller
patent: 2005/0286194 (2005-12-01), Fujiki et al.
Giussani Luca
Marano Vincenzo
Novelli Aldo
Duda Rina I
Iannucci Robert
Jorgenson Lisa K.
Seed IP Law Group PLLC
STMicroelectronics S.r.l.
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