Centrifugal pump unit
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United States of America Patent
Stats
-
Oct 18, 1994
Grant Date -
N/A
app pub date -
Feb 12, 1993
filing date -
Feb 14, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The centrifugal pump unit has a split tube motor in the form of a single phase induction motor with at least one power winding and a starting winding accommodated in a split tube casing. For the purpose of unblocking the rotor, a rectifier element is provided, which is able to be connected in parallel or in series with at least a part of a starter or power winding. The average torque produced by the motor when in its unjamming phase is always in the same direction, so that the pump will commence rotating in the correct direction when unjammed. The rectifier element may be connected in every time the pump unit is started, possibly for a predetermined time, or may alternatively be connected in only when jamming occurs.
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