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1. 发明申请

US20140001994A1 DISK DRIVE 有权
公开(公告)号：US20140001994A1
公开(公告)日：2014-01-02
申请号：US13927884
申请日：2013-06-26
申请人： Texas Instruments Incorporated
发明人： Masaki Yamashita , Chisako Asaoka , Nobuhiko Wasa
IPC分类号： H02P6/00
CPC分类号： H02P6/001 , G11B19/20 , G11B21/12 , H02P6/34
摘要： To provide a disk drive capable of inhibiting the occurrence of acoustic noise caused by a voltage pulse when the head is retracted using a speed control method using voltage obtained by rectifying a back electromotive force after the power source has been cut off from the rotation of a spindle motor. Retraction control circuit is used to control the on and off modes of transistors in accordance with the speed of VCM. The voltage across VCM becomes a voltage that can be regulated with VCM voltage control circuit. At this time, voltage is supplied to the terminals based on the voltage of ISO5V that is the rectified voltage of the back electromotive force of the spindle motor and the pulsating voltage is synchronized and produced at both terminals. As a result, the potential difference across VCM is such that the pulsating voltage is negated and acoustic noise is inhibited.

2. 发明授权

US08791657B2 Disk drive 有权
标题翻译：磁盘驱动器
公开(公告)号：US08791657B2
公开(公告)日：2014-07-29
申请号：US13927884
申请日：2013-06-26
申请人： Texas Instruments Incorporated
发明人： Masaki Yamashita , Chisako Asaoka , Nobuhiko Wasa
IPC分类号： H02P5/00 , H02P5/46 , H02P7/08
CPC分类号： H02P6/001 , G11B19/20 , G11B21/12 , H02P6/34
摘要： To provide a disk drive capable of inhibiting the occurrence of acoustic noise caused by a voltage pulse when the head is retracted using a speed control method using voltage obtained by rectifying a back electromotive force after the power source has been cut off from the rotation of a spindle motor. Retraction control circuit is used to control the on and off modes of transistors in accordance with the speed of VCM. The voltage across VCM becomes a voltage that can be regulated with VCM voltage control circuit. At this time, voltage is supplied to the terminals based on the voltage of ISO5V that is the rectified voltage of the back electromotive force of the spindle motor and the pulsating voltage is synchronized and produced at both terminals. As a result, the potential difference across VCM is such that the pulsating voltage is negated and acoustic noise is inhibited.
摘要翻译：提供一种磁盘驱动器，其能够使用使用电源从电源切断后的反电动势进行整流而获得的电压的速度控制方法来抑制由电压脉冲引起的声音噪声的发生主轴电机。退回控制电路用于根据VCM的速度控制晶体管的导通和关断模式。 VCM上的电压变为可以用VCM电压控制电路调节的电压。此时，基于作为主轴电动机的反电动势的整流电压的ISO5V的电压向端子供给电压，并且在两端子同步并产生脉动电压。结果，VCM之间的电位差使得脉动电压被否定并且噪声被抑制。

3. 发明授权

US09099944B2 Return control circuitry for VCM 有权
标题翻译： VCM返回控制电路
公开(公告)号：US09099944B2
公开(公告)日：2015-08-04
申请号：US14226362
申请日：2014-03-26
申请人： Texas Instruments Incorporated
发明人： Masaki Yamashita , Chisako Asaoka , Nobuhiko Wasa
IPC分类号： H02P5/00 , H02P5/46 , H02P6/00 , G11B19/20 , G11B21/12
CPC分类号： H02P6/001 , G11B19/20 , G11B21/12 , H02P6/34
摘要： To provide a disk drive capable of inhibiting the occurrence of acoustic noise caused by a voltage pulse when the head is retracted using a speed control method using voltage obtained by rectifying a back electromotive force after the power source has been cut off from the rotation of a spindle motor. Retraction control circuit is used to control the on and off modes of transistors in accordance with the speed of VCM. The voltage across VCM becomes a voltage that can be regulated with VCM voltage control circuit. At this time, voltage is supplied to the terminals based on the voltage of ISO5V that is the rectified voltage of the back electromotive force of the spindle motor and the pulsating voltage is synchronized and produced at both terminals. As a result, the potential difference across VCM is such that the pulsating voltage is negated and acoustic noise is inhibited.
摘要翻译：提供一种磁盘驱动器，其能够使用使用电源从电源切断后的反电动势进行整流而获得的电压的速度控制方法来抑制由电压脉冲引起的声音噪声的发生主轴电机。退回控制电路用于根据VCM的速度控制晶体管的导通和关断模式。 VCM上的电压变为可以用VCM电压控制电路调节的电压。此时，基于作为主轴电动机的反电动势的整流电压的ISO5V的电压向端子供给电压，并且在两端子同步并产生脉动电压。结果，VCM之间的电位差使得脉动电压被否定并且噪声被抑制。

4. 发明申请

US20140265966A1 DISK DRIVE 审中-公开
标题翻译：磁盘驱动器
公开(公告)号：US20140265966A1
公开(公告)日：2014-09-18
申请号：US14226362
申请日：2014-03-26
申请人： Texas Instruments Incorporated
发明人： Masaki Yamashita , Chisako Asaoka , Nobuhiko Wasa
IPC分类号： H02P6/00 , G11B19/20
CPC分类号： H02P6/001 , G11B19/20 , G11B21/12 , H02P6/34
摘要： To provide a disk drive capable of inhibiting the occurrence of acoustic noise caused by a voltage pulse when the head is retracted using a speed control method using voltage obtained by rectifying a back electromotive force after the power source has been cut off from the rotation of a spindle motor. Retraction control circuit is used to control the on and off modes of transistors in accordance with the speed of VCM. The voltage across VCM becomes a voltage that can be regulated with VCM voltage control circuit. At this time, voltage is supplied to the terminals based on the voltage of ISO5V that is the rectified voltage of the back electromotive force of the spindle motor and the pulsating voltage is synchronized and produced at both terminals. As a result, the potential difference across VCM is such that the pulsating voltage is negated and acoustic noise is inhibited.
摘要翻译：提供一种磁盘驱动器，其能够使用使用电源从电源切断后的反电动势整流得到的电压的速度控制方法来抑制由电压脉冲引起的声音噪声的发生主轴电机。退回控制电路用于根据VCM的速度控制晶体管的导通和关断模式。 VCM上的电压变为可以用VCM电压控制电路调节的电压。此时，基于作为主轴电动机的反电动势的整流电压的ISO5V的电压向端子供给电压，并且在两端子同步并产生脉动电压。结果，VCM之间的电位差使得脉动电压被否定并且噪声被抑制。

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