Fluid dynamic bearing motor for use with a range of rotational speed rated disc drive memory device products

A hydrodynamic bearing and fluid technology, applied in the direction of bearings, mechanical equipment, shafts and bearings, etc., can solve the problems of high manufacturing cost, high production cost, low sales volume, etc.

Inactive Publication Date: 2011-03-16
SEAGATE TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High performance 7200RPM products typically have higher manufacturing costs than standard performance 5400RPM products, and high performance products typically have lower sales volumes, resulting in higher production costs due to manufacturing cost sharing across fewer drives produced
Moreover, motors for desktop disk drive storage devices are also sold in various performance classes, i.e. low (i.e. 5400 RPM), medium (i.e. 7200 RPM) and high (i.e. 10000 RPM) performance, which also results in higher production costs

Method used

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  • Fluid dynamic bearing motor for use with a range of rotational speed rated disc drive memory device products
  • Fluid dynamic bearing motor for use with a range of rotational speed rated disc drive memory device products
  • Fluid dynamic bearing motor for use with a range of rotational speed rated disc drive memory device products

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Embodiment Construction

[0076] Exemplary embodiments will be described in conjunction with specific structures. Those skilled in the art will appreciate that various changes and modifications can be made without departing from the scope of the appended claims. Furthermore, well-known elements, devices, components, methods, process steps, etc. have not been described in detail so as not to obscure the present invention.

[0077] In order to reduce the production cost of disk drive motors for high-end disk drive products that typically do not sell well, it is desirable to use a single motor design for a range of different rated speed disk drive storage device products (i.e., 5400 RPM) operating at different rated speeds. with 7200RPM speed product). As a result, overall manufacturing volumes are increased and the cost increases associated with dedicated lines for high-end 7200RPM products can be avoided. However, motors designed to run at 7200 RPM typically include a motor torque constant (Kt) lower ...

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Abstract

A fluid dynamic bearing motor and method are provided for use with various disc drive memory device products differently rated by operational rotational speed. The operational speeds are those speeds measured during reading and writing memory operations to the memory device. In an aspect, the present invention meets full operating requirements, including stiffness and power requirements, at multiple rated speeds for use with either standard or high-end performance disc drive products. Costs associated with a dedicated manufacturing line for high-end products are substantially reduced. A single manufacturing line can serve both standard and high-end disc drive memory device products. The present invention is especially useful in reducing costs of 2.5 inch notebook products that are typically marketed in two levels of performance, namely, 5400 RPM standard performance products and 7200 RPM high performance products.

Description

technical field [0001] The present invention relates generally to a disk drive storage device, and more particularly to a method and a fluid dynamic bearing motor for use with a range of different rotational speed rating disk drive storage device products, the disk drive storage device Products run at different rotational speeds during storage operations. Background technique [0002] Disk drive storage systems are used in traditional stationary computing environments as well as in mobile environments, including portable notebook computers, digital still cameras, digital video cameras, video game consoles, and personal music players. These storage systems store digital information recorded on concentric tracks on magnetic disk media. At least one disk is rotatably mounted on the spindle, and the information stored on the disk in magnetically transducible form is accessed using a read / write head or transducer. A drive controller is typically used to control the disk drive s...

Claims

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Application Information

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IPC IPC(8): F16C32/06F16C33/04F16C33/10G11B15/18
CPCG11B19/2036G11B19/20G11B5/6005H02K1/187H02K7/085
Inventor 林保来叶保铭郑俊锋云惟人C·M·沃尔德玛G·P·弗洛雷斯A·J·艾伊罗
Owner SEAGATE TECH LLC
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