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This paper addresses the simulation and analysis of brushless
spindle motorwith three-phase and eight-pole that operates in
the high-speed optical diskdrive. First the static and
dynamic models of the motors are established inorder to
analyze the characteristic of brushless spindle dc motor.
Secondlythe simulation of the dynamic model of brushless spindle
motor with drivingcircuit is then established to observe the
back-EMF waveform of the motor inhigh speed operation. This
paper describes how to reduce the torque ripppleusing
compensated current method. Finally, this paper will also
verify theback-EMF waveform by experiment. The observations
obtained in this paper willbe useful for the servo control of
high-speed optical disk drive.
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