公开(公告)号：US06909572B2

公开(公告)日：2005-06-21

申请号：US10431336

申请日：2003-05-07

申请人： Gianluca Ventura ,  Alberto Salina ,  Alessandra Schenone ,  Fabio Ramaioli ,  Luca Anostini

发明人： Gianluca Ventura ,  Alberto Salina ,  Alessandra Schenone ,  Fabio Ramaioli ,  Luca Anostini

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/54 ,  G11B5/55 ,  G11B21/12 ,  G11B21/02

CPC分类号： G11B5/012 ,  G11B5/54 ,  G11B5/553 ,  G11B21/12 ,  G11B2005/001

摘要： A disk drive system is described which includes a disk having a magnetic surface and a motor for rotating the disk, a magnetic head being movable relative to said magnetic surface. The motor generates a back electromotive force voltage having different phases and the system comprising a plurality of switches for switching the back electromotive force voltage, a control circuit to control the plurality of switches to supply the back electromotive force voltage to direct the head to a parking position. The system also comprises a comparator adapted to compare a single phase of the back electromotive force voltage with the sum of the other phases of the back electromotive force voltage. The comparator generates an output signal representative of the comparation and the system comprises a logic block controlled by the output signal of the comparator. The logic block is adapted to determine time periods and a control sequence of the switches which is associated to the time periods. The control sequence is supplied to the control circuit so that the last generates control signals to control the plurality of switches.

摘要翻译： 描述了一种磁盘驱动器系统，其包括具有磁性表面的盘和用于旋转盘的马达，磁头可相对于所述磁性表面移动。 电动机产生具有不同相位的反电动势电压，并且系统包括用于切换反电动势电压的多个开关，控制电路以控制多个开关以提供反电动势电压以将头引导到停车 位置。 该系统还包括比较器，用于将反电动势电压的单相与反电动势电压的其它相位之和进行比较。 比较器产生表示比较的输出信号，并且系统包括由比较器的输出信号控制的逻辑块。 逻辑块适于确定与时间段相关联的时间段和开关的控制序列。 控制序列被提供给控制电路，使得最后一个产生控制信号以控制多个开关。

公开(公告)号：US20050068656A1

公开(公告)日：2005-03-31

申请号：US10672925

申请日：2003-09-26

申请人： Alberto Salina ,  Roberto Peritore ,  Fabio Ramaioli

发明人： Alberto Salina ,  Roberto Peritore ,  Fabio Ramaioli

IPC分类号： G11B5/54 ,  G11B21/02 ,  G11B21/12

CPC分类号： G11B21/12 ,  G11B5/54

摘要： A disk drive may include a housing, and a rotatable data storage disk and associated disk drive motor carried by the housing for rotating the rotatable data storage disk. The disk drive may also include a movable arm and associated arm drive motor carried by the housing for moving the arm adjacent to the rotatable data storage disk. Further, at least one read/write head may be carried by the arm, and a driving circuit may be included for the arm drive motor. The driving circuit may include at least one output stage connected to a power supply for driving the arm drive motor, at least one capacitor connected to the power supply, and an auxiliary pulse width modulation (PWM) control circuit connected to the at least one capacitor for driving the at least one output stage in a PWM mode after the power supply is switched off.

摘要翻译： 磁盘驱动器可以包括壳体，以及由壳体承载的旋转数据存储盘和相关联的盘驱动马达，用于旋转可旋转数据存储盘。 磁盘驱动器还可以包括由壳体承载的可移动臂和相关联的臂驱动马达，用于使臂相对于可旋转数据存储盘移动。 此外，至少一个读/写头可以由臂承载，并且可以包括用于臂驱动电动机的驱动电路。 驱动电路可以包括至少一个输出级，其连接到用于驱动臂驱动电动机的电源，连接到电源的至少一个电容器和连接到至少一个电容器的辅助脉宽调制（PWM）控制电路 用于在电源关闭之后以PWM模式驱动至少一个输出级。