Positioning controller

Details Positioning controller Positioning controller

2005-04-12

2005-04-12

Duda, Rina (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S132000, C318S434000, C318S560000, C318S466000, C318S468000

Reexamination Certificate

active

06879119

ABSTRACT:
A positioning controller includes a gear mechanism having a rotating gear for positioning a movable member, a brushless motor to drive the rotating gear, and a motor control circuit to rotate a rotor of the brushless motor by sequentially supplying a driving pulse to a plurality of fixed coils of the brushless motor. The motor control circuit includes a present stage number detector to detect a present stage number of the movable member in accordance with an output signal from a magneto-sensitive device of the brushless motor, and a driving pulse generator to generate a driving pulse to rotate the rotor until a target stage number converted from a specified position of the movable member is equal to the present stage number. The controller in an apparatus including a motor driving unit allows positioning of the movable member without using a component for the detection of the position of the movable member.

REFERENCES:
patent: 4969137 (1990-11-01), Sugiyama et al.
patent: 5350988 (1994-09-01), Le
patent: 5675230 (1997-10-01), Dunfield
patent: 5850277 (1998-12-01), Dang et al.
patent: 5959956 (1999-09-01), Takishima
patent: 1 026 068 (2000-08-01), None
WO 99/08374 A; Burton Anthony Water et al.; Feb. 18, 1999; abstract.

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