Synchronous motor, particularly for an aquarium pump
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United States of America Patent
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N/A
Issued Date -
Aug 31, 2006
app pub date -
Feb 20, 2006
filing date -
Feb 28, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In a propeller pump for an aquarium, starting-up of the rotor in the correct direction of rotation is guaranteed through the fact that a unit, which is formed by the propeller and the rotor of the pump, is disposed on a spindle in an axially displaceable and rotatable manner. If starting-up occurs in the wrong direction, said unit, and thereby the rotor, is drawn axially out of the magnetic field of the stator until the magnetic coupling between said stator and said rotor is no longer sufficient for further driving in the angular direction. The unit formed by the rotor and the propeller is then drawn back into the stator again by axial magnetic components of force, where a fresh opportunity of starting up again is imparted to it. It is guaranteed that the rotor will revolve in the correct direction after, at the latest, a few attempts at starting up.
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