Rotary drive for a data carrier
AssigneePapst Licensing GmbH & Co. KG
InventorHelmut Hans
Life of this patent
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Abstract
A data medium is driven by a brushless direct current motor and possesses control signals on a track which can be picked up by a sensing device and supplied to a switch arrangement for activation of the motor winding. The control signals on the track characterize at least those angular positions of the rotor with respect to the stator in which commutation is to be initiated.
Claims9
A rotary drive for rotating a data carrier, comprising a brushless direct current motor with a permanent magnet rotor;
- a wound stator having at least one winding coil;
- a circuit arrangement for activating the coil to generate a magnetic field for producing rotary movement in the rotor;
- sensing means for reading signals recorded on the data carrier, the output of the sensing means being connected to the circuit arrangement for activating the winding, and the data carrier having control signals which identify at least those angular positions of the rotor relative to the stator at which commutation of current fed to the winding coil is to be initiated.
A drive as claimed in any one of the preceding claims, wherein the sensing means includes respective write/read heads for the motor control signals and for the data signals to be written onto or read from the data carrier.
Dependencies are inferred from the claim text.