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Uni-torque DD motor
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Features of the new uni-torque motor
1. Torque ripple minimized
2. Minimal wow and flutter
3. Compact
4, Long service life because of commutator-less
5. Magnetic induction which can affect the playback head minimized
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Principle of new
uni-torque motor
Basically it is the same as a 3-phase AC motor.
There are no coils on the stator
or rotor;
the drive coil is between them.
This means that the magnetic field between the rotor and stator is the same
whatever the position of the rotor, so that the torque is uniform.
In this uni-torque motor, the drive system uses 3-phase alternating current so
give a more even magnetic field which makes possible the 0.023% WRMS wow
and flutter.
Structure of new uni-torque motor
Structure of conventional
uni-torque motor
1
Yoke plate
Bearing
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