Spindle motor assembly for low acoustic noise environments

Details Spindle motor assembly for low acoustic noise environments Spindle motor assembly for low acoustic noise environments

1987-12-17

1989-05-23

Stephan, Steven L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

360 9807, 369270, G11B 2504

Patent

active

048336670

ABSTRACT:
A mounting structure for a spindle motor assembly is disclosed that is capable of reducing acoustic noise generated by the motor assembly. Standard spindle motor assembly parts are provided with a viscoelastic stator mounting system that isolates and damps vibrations between the rotor assembly and the rest of the spindle motor assembly. Additionally, rotor slots are provided in the rotor cap. The slots are designed to ensure that the resonant frequency of the rotor cap is substantially different than the switching frequency of the motor itself.

REFERENCES:
patent: 1917633 (1933-07-01), Burt
patent: 4553183 (1985-11-01), Brown et al.
patent: 4716482 (1987-12-01), Walsh

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