Method for driving a bidirectional motor to rotate a fluid...

Details Method for driving a bidirectional motor to rotate a fluid... Method for driving a bidirectional motor to rotate a fluid...

2011-06-28

2011-06-28

Freay, Charles G (Department: 3746)

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

C417S217000, C318S700000, C318S715000, C318S722000

Reexamination Certificate

active

07967573

ABSTRACT:
A method for starting a motor (14) with a bidirectional rotation direction, to rotate a fluid circulation centrifugal pump (10) having a predetermined optimum hydraulic efficiency depending on the starting rotation direction thereof. The method provides an initial motor (14) starting in either rotation direction, with subsequent pump (10) rotation in the same direction and, subsequently, a periodical interruption and restoration of the motor (14) power feeding as many times (N, N′) as to ensure the motor (14) starting, at least one or more times within a predetermined time interval (Ttot, Ts), in the rotation direction which corresponds to the predetermined pump (10) optimum hydraulic speed.

REFERENCES:
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patent: 3773432 (1973-11-01), Chow et al.
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patent: RE37360 (2001-09-01), Duncan
patent: 6748618 (2004-06-01), Darby et al.
patent: 7146760 (2006-12-01), Yiu
patent: 7589483 (2009-09-01), Darby
patent: 0807396 (1997-11-01), None
patent: 00/29660 (2000-05-01), None

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