Motor control circuit with malfunction monitoring

Details Motor control circuit with malfunction monitoring Motor control circuit with malfunction monitoring

2011-08-16

2011-08-16

Fureman, Jared J (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

Reexamination Certificate

active

08000070

ABSTRACT:
The invention relates to a control circuit which serves for security-critical control of a consumer with an inductive load portion, to be connected to a direct voltage source, and a method for failure control. It is in this case assumed that the control circuit has a power driving assembly, a free-wheeling assembly and a reverse-connection protected assembly. In order to increase the probability of failure recognition, this control circuit is extended by a method for failure control. For this purpose the semiconductor switches of the assemblies, each formed by a MOSFET, are individually driven. The different switching statuses are checked by a diagnostic device which processes voltage values to be read out at outputs of the control circuit. In this way failure-free functionality and also possible causes of failure in the control circuit can be diagnosed.

REFERENCES:
patent: 6512346 (2003-01-01), Yoshimura
patent: 6577482 (2003-06-01), Eisenhardt et al.
patent: 6683777 (2004-01-01), Shimoida et al.
patent: 6747732 (2004-06-01), Lee
patent: 199 41 489 (2001-03-01), None
patent: 101 18 401 (2001-11-01), None
patent: 100 50 287 (2002-05-01), None

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