Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Reexamination Certificate
2006-09-28
2008-11-11
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
C318S163000, C388S904000
Reexamination Certificate
active
07449850
ABSTRACT:
A motor control method/device is provided in which a speed change during a deceleration period is stabilized in performing a speed feedback control of a motor. In the motor control method/device, the speed feedback control is performed such that a speed of a body driven by the motor is consistent with a predetermined target speed. A deceleration directive corresponding to time elapsed since a predetermined deceleration control start timing is generated as the target speed using a deceleration function of the elapsed time, to perform the speed feedback control based on the deceleration directive, during a deceleration control period. The deceleration control period starts from the deceleration control start timing and ends when the driven body is stopped. The deceleration function monotonically decreases from the deceleration control start timing until the deceleration directive becomes zero (0) and its derivative is a monotonically decreasing or increasing function or a constant.
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Banner & Witcoff Ltd
Brother Kogyo Kabushiki Kaisha
Donovan Lincoln
Luo David S
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