Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1989-03-08
1992-01-28
Bertsch, Richard A.
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
417418, 310 12, 318135, F04B 4900
Patent
active
050839055
ABSTRACT:
A pump unit comprises a pump piston driven by a linear electric motor having induction and reaction members with closely adjacent flat surfaces. A reaction member can be sandwiched between two induction members. Co-operating induction and reaction members extend radially from a rod connected to the piston or to two axially spaced pistons or are grouped tangentially around it. The piston or pistons are driven synchronously and so that constant force is applied by way of a control system which includes a trajectory generator and a controller responsive to selected inputs relating to pump performance characteristics and feedback signals derived from measured current flow and piston position.
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patent: 4528466 (1985-07-01), von der Heide et al.
patent: 4607197 (1986-08-01), Conrad
patent: 4687054 (1987-08-01), Russell et al.
Bertsch Richard A.
Framo Developments (UK) Limited
Scheuermann David W.
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