Motor spindle control system and method

Details Motor spindle control system and method Motor spindle control system and method

2007-09-17

2010-10-05

Masih, Karen (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400340, C318S400350

Reexamination Certificate

active

07808193

ABSTRACT:
In a motor having a number of poles that have nominally equiangularly-spaced positions that in fact deviate from those positions, the actual periods between zero-crossings of the back-EMF generated during pole-pair interactions are measured. The ratios of the various pole periods can then be computed, and the motor drive profile can be adjusted for each pole by applying the respective ratio to fit samples of the back-EMF profile to each respective pole.

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