Driving circuit for stepping motor

Details Driving circuit for stepping motor Driving circuit for stepping motor

1995-01-24

1996-07-30

Ip, Paul

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318254, 318138, 318797, H02K 2900

Patent

active

055414877

ABSTRACT:
A driving circuit for a stepping motor comprises bridge circuits being composed of switching elements connected between a DC power source and the coils of a stepping motor, rectifier diodes connected in antiparallel to the switching elements, capacitors connected in parallel to the bridge circuits, and constant voltage diodes connected between the DC power source and junction points of the bridge circuits and the capacitors. The switching elements are constituted to be ON/OFF controlled by a predetermined exciting system, and the constant voltage diodes are set to turn conductive to form a feedback circuit even if they are in a biased state in the reverse direction when the capacitors are charged up to a voltage which is higher than the source voltage and lower than the breakdown voltage of the switching elements by the counter electromotive force induced in the coils.

REFERENCES:
patent: 4005347 (1977-01-01), Erdman
patent: 4117364 (1978-09-01), Baker
patent: 4169990 (1979-10-01), Lerdman
patent: 4916379 (1990-04-01), Wand et al.
patent: 5146147 (1992-09-01), Wills et al.
patent: 5214365 (1993-05-01), Bahn
patent: 5289099 (1994-02-01), Bahn
patent: 5319297 (1994-06-01), Bahn
patent: 5377094 (1994-12-01), Williams et al.

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