Control device for movable member
AssigneeAisin Seiki Kabushiki Kaisha
InventorsToshimitsu Oka, Kohji Aoki, Hideyuki Kanie, Hitoshi Ishikawa
Life of this patent
Estimating the term…
Abstract
A control device for a movable member includes a DC motor for establishing position transfer of the movable member in such a manner that after a first position of the movable member is stored in a memory, even if the movable member is at a second position, the moving member is returned to the first position only upon manipulating a switch and a motor pulse generating circuit generates a cut-off frequency which is variable depending on a ripple pulse frequency which is indicative of a rotational number of the motor.
Claims7
A control device for a movable member comprising:
- a DC motor for moving the movable member;
- a pulse shaping circuit for shaping a ripple pulse indicative of a rotational number of the DC motor;
- a clock generating circuit providing a clock signal according to the ripple pulse;
- a filter for eliminating noise in a current wave or a voltage wave of the DC motor depending on a cut-off frequency which is varied by the clock signal;
- wherein the pulse shaping circuit shapes the ripple pulse according to the current wave or the voltage wave of the DC motor;
- position calculation means for calculating a present position of the movable member according to the ripple pulse;
- memory means for storing a desired position as a first position;
- and
- control means for controlling a drive of the DC motor to move the movable member from other than the first position to the first position.
A control device for a movable member comprising:
- a DC motor for moving the movable member;
- a pulse shaping circuit for shaping a ripple pulse indicative of the rotational number of the DC motor according to a current wave or a voltage wave of the DC motor;
- position calculation means for calculating a present position of the movable member according to the ripple pulse;
- memory means for storing a desired position as a first position;
- control means for controlling a drive of the DC motor to move the movable member from other than the first position to the first position;
- and
- correction means for correcting the present position according to a correction number as a predetermine distance of the movable member which moves by an inertia action of the DC motor when the drive of the DC motor is stopped.
Dependencies are inferred from the claim text.