Patent ID: 6215266
Filing Date: 2001-04-10
Classification: H02M,H02P

Abstract:
A system for low acoustic noise spindle motor commutation, comprising:a control device for generating a plurality of commutation control signals;a plurality of spindle motor drivers responsive to the commutation control signals for spindle motor commutation;a spindle motor responsive to signals from the spindle motor drivers, the spindle motor having a spindle motor rotor and a spindle motor stator, at least one of the spindle motor rotor and spindle motor stator having a plurality of windings for inducing movement in the spindle motor rotor; anda plurality of low acoustic noise snubber devices responsive to signals from the control device, each low acoustic noise snubber device being coupled to a corresponding stator winding and dynamically configurable by the control device to provide both lower resistance and higher capacitance and resultant lower spindle motor driver charging current upon application of power to the spindle motor, and higher resistance and lower capacitance and resultant reduced acoustic noise and back EMF-generated current and voltage surges at the spindle motor driver during spindle motor commutation.