Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Patent
1996-03-28
1998-11-10
Wysocki, Jonathan
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
388840, 318442, H02P 700
Patent
active
058349138
ABSTRACT:
The present invention provides the following rotation control method for reducing energy consumption of a motor driving a disk. In a constant speed mode, a supply voltage V1 for driving the motor at a constant speed N1 is selected; however, at a lower constant speed N2, a supply voltage V2 lower than V1 is selected. In an acceleration mode for accelerating the motor speed from N2 to N1, a higher supply voltage than V1 is selected just before starting acceleration, and then V1 is selected after the acceleration. In a speed deceleration mode for decelerating the motor speed from N1 to N2, a lower supply voltage than V1 is selected just before starting deceleration, then the supply voltage V2 is selected after the decleration.
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Akagi Noritaka
Kuno Yoshiki
Yoshida Shuichi
Matsushita Electric - Industrial Co., Ltd.
Wysocki Jonathan
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