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1. 发明授权

US4839754A Winchester disk drive motor circuitry 失效
标题翻译：温彻斯特磁盘驱动电机电路
公开(公告)号：US4839754A
公开(公告)日：1989-06-13
申请号：US019543
申请日：1987-02-26
申请人： Bipin V. Gami , Ericson Dunstan
发明人： Bipin V. Gami , Ericson Dunstan
IPC分类号： G11B19/06 , G11B19/20 , G11B19/28 , G11B25/04 , G11B33/12 , G11B33/14
CPC分类号： G11B33/122 , G11B19/06 , G11B19/20 , G11B19/28 , G11B25/043 , G11B33/144
摘要： An improved switching regulator power supply with a variable duty cycle is disclosed which forms part of a compact Winchester disk drive system having a storage capacity in excess of 380M bytes of information. The switching regulator is designed for frequencies in excess of 80 kilocycles per second and may therefore be construced using smaller capacitive and inductive elements. Also, very low heat dissipation and high regulator efficiency may be achieved by the improved power supply to drive a brushless D. C. motor encased within a hard disk assembly where no separate fan or cooling system is used to aid in heat removal. Circuitry is provided to control the motor speed while simultaneously limiting the motor current to a predetermined level. This is a achieved by controlling the voltage applied to the motor by suitably adjusting the duty cycle of the switching regulator. A filter is provided to ensure that the switching regulator current fluctuations are not reflected in the current drawn from the power supply. At the start when the D. C. motor E.M.F. is zero, the switching regulator causes significantly higher current to flow through the motor than is drawn from the power supply through a current multiplying effect. These unique features provides significant advantages in a Winchester disk drive using thin film media whose overcoming high level of initial stiction-friction forces is important and desirable.
摘要翻译：公开了一种具有可变占空比的改进的开关稳压器电源，其形成具有超过380M字节信息的存储容量的紧凑型温彻斯特磁盘驱动器系统的一部分。开关调节器设计用于每秒超过80千次的频率，因此可以使用较小的电容和电感元件进行构造。而且，通过改进的电源可以实现非常低的散热和高的调节器效率，以驱动无刷D.C电机，其被封装在硬盘组件内，其中没有单独的风扇或冷却系统用于辅助除热。提供电路以控制电动机速度，同时将电动机电流限制到预定水平。这是通过适当地调整开关调节器的占空比来控制施加到电动机的电压来实现的。提供了一个滤波器，以确保开关调节器的电流波动不会反映在从电源提取的电流中。在开始时D.马达E.M.F. 为零，开关调节器通过电流倍增效应使电流流过电动机的电流明显高于从电源抽出的电流。这些独特的功能在使用薄膜介质的温彻斯特磁盘驱动器中提供了显着的优点，其克服了高水平的初始静摩擦力是重要和可取的。

2. 再颁专利

USRE34399E Winchester disk drive motor circuitry 失效
标题翻译：温彻斯特磁盘驱动电机电路
公开(公告)号：USRE34399E
公开(公告)日：1993-10-05
申请号：US920143
申请日：1992-07-24
申请人： Bipin V. Gami , Ericson Dunstan
发明人： Bipin V. Gami , Ericson Dunstan
IPC分类号： G11B19/06 , G11B19/20 , G11B19/28 , G11B25/04 , G11B33/12 , G11B33/14 , G11B15/46
CPC分类号： G11B33/122 , G11B19/06 , G11B19/20 , G11B19/28 , G11B25/043 , G11B33/144
摘要： An improved switching regulator .Iadd.DC-DC power converter or .Iaddend.power supply with a variable duty cycle is disclosed which forms part of a compact Winchester disk drive system having a storage capacity in excess of 380M bytes of information. The switching regulator is designed for frequencies in excess of 80 kilocycles per second and may therefore be construced using smaller capacitive and inductive elements. Also, very low heat dissipation and high regulator efficiency may be achieved by the improved .Iadd.power converter or .Iaddend.power supply to drive a brushless D.C. motor encased within a hard disk assembly where no separate fan or cooling system is used to aid in heat removal. Circuitry is provided to control the motor speed while simultaneously limiting the motor current to a predetermined level. This is a achieved by controlling the voltage applied to the motor by suitably adjusting the duty cycle of the switching regulator. A filter is provided to ensure that the switching regulator current fluctuations are not reflected in the current drawn from the power supply. At the start when the D. C. motor E.M.F. is zero, the switching regulator causes significantly higher current to flow through the motor than is drawn from the power supply through a current multiplying effect. These unique features provides significant advantages in a Winchester disk drive using thin film media whose overcoming high level of initial stiction-friction forces .Iadd.between the read/write heads and the recording media .Iaddend.is important and desirable.

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