05530326 is referenced by 54 patents and cites 12 patents.

Angular position of a polyphase brushless DC motor rotor is determined by the steps of generating a sequence of pulses with a programmed digital microcontroller, sequentially applying the pulses to selected ones of the plural windings or winding pairs, and sequentially measuring differential inductive coupling between the selected ones of the windings and selected others of the windings without rotating the rotor. Once angular position is determined, a multi-mode startup sequence is carried out to spin up the motor to a desired rotational velocity without any counter-rotation at startup.

Title
Brushless DC spindle motor startup control
Application Number
8/94484
Publication Number
5530326
Application Date
July 19, 1993
Publication Date
June 25, 1996
Inventor
Daniel E Swiger
San Jose
CA, US
John J Galvin
Milpitas
CA, US
Agent
David B Harrison
Assignee
Quantum Corporation
CA, US
IPC
H02P 6/02
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