Motor driving circuit

Details Motor driving circuit Motor driving circuit

1997-01-21

1997-12-30

Ro, Bentsu

Electricity: motive power systems

Motor magnetic energy dissipation

318501, 318519, 388903, 361 33, H02H 709, H03K 1716

Patent

active

057034516

ABSTRACT:
Between one end of a motor coil and the ground, a drive transistor is connected. When the drive transistor is turned off, and in particular at the moment when a current flowing through the motor coil drops to zero, a back electromotive force is induced at said one end of the motor coil. The back electromotive force is clamped by a pnp-type transistor with its base supplied with a constant voltage and its emitter connected to said one end of the motor coil.

REFERENCES:
patent: 4249219 (1981-02-01), Aoi et al.
patent: 5572096 (1996-11-01), Schlager
patent: 5576648 (1996-11-01), Rossi et al.

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