AES Store

Journal Forum

Reflecting on Reflections - June 2014
1 comment

Quiet Thoughts on a Deafening Problem - May 2014
1 comment

Perceptual Effects of Dynamic Range Compression in Popular Music Recordings - January 2014
5 comments

Access Journal Forum

AES E-Library

A New Phonograph Motor with Stable Hanging Rotor

In the conventional phonograph motor, the bearing which supports the rotor is placed underneath the spindle. In such designs, the wow and flutter cannot be reduced below approximately 0.01%, even with the use of a slotless and coreless motor. In the newly developed phonograph motor, the thrust bearing is located near the top of the spindle producing the hanging rotor design which has the following features: 1) A slotless and coreless motor resulting in very low wow and flutter of less than 0.003% WRMS, 2) a motor design using dual anisotropic ferrite ring magnets produces a large torque of 10-Kg-cm resulting in a start up time of less than 0.3 seconds, and 3) a motor having a precise speed sensor permitting PLL speed control to the accuracy of a quarts crystal.

Authors:
Affiliation:
AES Convention: Paper Number:
Publication Date:

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!


 
Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society