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2. 发明授权

US4518904A Stepper motor control for data disk system 失效
标题翻译：数据磁盘系统的步进电机控制
公开(公告)号：US4518904A
公开(公告)日：1985-05-21
申请号：US573708
申请日：1984-01-25
申请人： Nigel MacLeod , David Ruxton
发明人： Nigel MacLeod , David Ruxton
IPC分类号： G11B5/55 , G11B21/08 , H02P8/00 , H02K29/04
CPC分类号： H02P8/00 , G11B21/085 , G11B5/553
摘要： A data disk storage system utilizing a bipolar stepper motor for use in conjunction with the controlling of the operation of the storage system. The stepper motor imparts a drive force for moving a control arm to which a read/write head is coupled. The operation of the stepper motor through driving of the control arm causes the read/write head to move across the various tracks of the data disk within the data storage system during operation of such system. The stepper motor includes a stator and a rotor coupled to an output shaft of the motor which output shaft in turn is coupled to the read/write head through the control arm. A first drive mechanism within the stepper motor generates a first phase signal within the stator for creating a first drive force for rotating a rotor. A second drive mechanism of the stepper motor generates a second phase signal within the stator for creating a second drive force for rotating the rotor. These first and second drive forces are out of phase with each other, normally by 90.degree. when both signals are positive or both are negative or by multiples of 90.degree. when one of the signals is positive and the other is negative. A control mechanism selectively provides positive and negative phase current signals to the first and second drive mechanisms for generating 8 stable step positions for the rotor during each motor cycle. This control mechanism controls the current supplied to the first and second drive mechanism so that the resulting holding torque on the rotor generated by the first and second drive mechanisms is substantially the same at each step position.
摘要翻译：一种数据盘存储系统，利用双极步进电机与控制存储系统的操作结合使用。步进电机提供用于移动读/写头耦合到的控制臂的驱动力。通过控制臂的驱动，步进电机的操作使得读/写头在这种系统的操作期间在数据存储系统内的数据盘的各种轨迹上移动。步进电动机包括定子和联接到电动机的输出轴的转子，输出轴又通过控制臂耦合到读/写头。步进电机内的第一驱动机构在定子内产生第一相位信号，以产生用于旋转转子的第一驱动力。步进电机的第二驱动机构在定子内产生第二相位信号，以产生用于旋转转子的第二驱动力。当两个信号为正或者两个为负时，这些第一和第二驱动力彼此不同相，通常为90°，当信号之一为正，另一个为负时，均为90度或90度的倍数。控制机构选择性地向第一和第二驱动机构提供正相和负相电流信号，以在每个电机循环期间为转子产生8个稳定的步进位置。该控制机构控制提供给第一驱动机构和第二驱动机构的电流，使得由第一驱动机构和第二驱动机构产生的转子上产生的保持转矩基本上相同。

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