Enhanced performance for DC motor drive switching

Details Enhanced performance for DC motor drive switching Enhanced performance for DC motor drive switching

2006-02-14

2006-02-14

Masih, Karen (Department: 2837)

Electricity: motive power systems

Motor-reversing

Periodic- or intermittent-reversing

C318S256000, C318S283000

Reexamination Certificate

active

06998803

ABSTRACT:
An improved drive circuit is provided for a DC motor. The drive circuit includes: a DC power source; a relay having a normally open contact and a normally closed contact; a DC motor electrically connected through the normally open contact of the relay to the power source; and a discharge circuit connected in parallel to the DC motor. More specifically, the discharge circuit is coupled to the normally closed contact of the relay and operable to inhibit current flow from the DC motor until the relay has settled in a closed position.

REFERENCES:
patent: 3774082 (1973-11-01), Chang
patent: 4066937 (1978-01-01), Pfarrer et al.
patent: 4689533 (1987-08-01), Yang
patent: 5502609 (1996-03-01), Thomas et al.
patent: 5793171 (1998-08-01), Hyashi et al.
patent: 6049178 (2000-04-01), Sheu et al.

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