Centrifugal pump unit

Details Centrifugal pump unit Centrifugal pump unit

1993-02-12

1994-10-18

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

318778, 318794, F04B 4906

Patent

active

053562666

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.

REFERENCES:
patent: 3633082 (1972-01-01), Hasegawa
patent: 3761792 (1973-09-01), Whitney et al.
patent: 4300081 (1981-11-01), Van Landingham
patent: 4459535 (1984-07-01), Schutten et al.
patent: 4516915 (1985-05-01), Jensen et al.
patent: 4651077 (1987-03-01), Woyski
patent: 5017853 (1991-05-01), Chmiel
Theodor Bodefeld et al., "Elektrische Maschinen," Springer-Verlag (1961), pp. 290-292.

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