Control system for an electrical machine

Details Control system for an electrical machine Control system for an electrical machine

2008-10-17

2011-11-08

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Braking

Dynamic braking

C318S375000, C318S139000, C318S377000, C318S802000, C318S803000, C318S804000, C318S806000, C318S812000, C318S801000, C320S132000, C320S134000, C361S023000, C361S074000, C361S076000, C361S079000, C361S084000

Reexamination Certificate

active

08054014

ABSTRACT:
In a control system and a method for operating a permanent-magnet electrical machine, when the electrical machine is switched off after one of a functional computer and a monitoring computer of the control system has identified a fault, in order to reduce the braking torque of the electrical machine, which is switched-off but still rotating an output stage of the control system is subjected to a three-phase short circuit if the rotation speed D1does not fall below a definable limit value GR1or if a voltage U_DC of the output stage (2) exceeds a limit value Umax, and when the rotation speed D1is below the definable limit value GR1and a voltage U_DC of the output stage does not exceed a limit value Umax, all the circuits breakers (2o1, 2o2, 2o3, 2u1, 2u2, 2u3) of the output stage (2) are opened in order to fully disconnect the electrical machine from the output stage.

REFERENCES:
patent: 5631796 (1997-05-01), Yoshihara et al.
patent: 5796224 (1998-08-01), Hayashi et al.
patent: 5914582 (1999-06-01), Takamoto et al.
patent: 6239566 (2001-05-01), Tareilus et al.
patent: 6836085 (2004-12-01), Kawada et al.
patent: 7064513 (2006-06-01), Fenley
patent: 7133602 (2006-11-01), Yamada

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