Method for controlling the motor of a pump involving the...

Details Method for controlling the motor of a pump involving the... Method for controlling the motor of a pump involving the...

2005-12-27

2005-12-27

Thorpe, Timothy S. (Department: 3746)

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

C417S045000, C417S053000, C318S432000, C318S366000, C318S254100

Reexamination Certificate

active

06979181

ABSTRACT:
A method for controlling a motor (11) driving a pump (10) using a microcomputer (14) includes repeatedly sampling a parameter representative of motor torque over one cycle of operation of the pump (10), determining at least one point of maximum motor torque during said one cycle of operation of the pump (FIG.4); applying speed commands to the motor (11) from a table of stored speed values in memory (19), said values being selected to provide relatively greater speed commands at points of lower motor torque and relatively lesser speed commands at points of higher pump pressure corresponding to higher motor torque, while maintaining at least a base speed command to prevent stalling; and synchronizing the first value in the table of stored values to the point of maximum motor torque.

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patent: 2004/0084179 (2004-05-01), Watson et al.
patent: WO00/25416 (2000-05-01), None

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