Stepping motor control system

Details Stepping motor control system Stepping motor control system

1992-05-14

1993-11-23

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

052647714

ABSTRACT:
The invention concerns with a system for controlling a stepping motor, and more particularly with a stepping motor control system which moves a head of a disk drive unit with (1-2)-phase excitation. With the stepping motor controlling system, a driving force is produced to rotate the stepping motor by a predetermined angle with the (1-2)-phase excitation for ech step pulse supplied from the exterior, and step pulses with a plurality of cycles are used to make the stepping motor rotate at different speeds depending on the cycles of the step pulses. In that controlling system, a time period of the 1-phase excitation is changed depending on the pulse interval of the step pulses, thereby reducing a level of noisy sounds like seek noise.

REFERENCES:
patent: 4775825 (1988-10-01), Moribe et al.
patent: 4988938 (1991-02-01), Ito et al.
patent: 5001410 (1991-03-01), Ono
patent: 5032779 (1991-07-01), Takahashi
patent: 5041773 (1991-08-01), Takahashi

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