Method of operating a pumping system
AssigneeThe BOC Group, Inc.
InventorSimon Harold Bruce
Life of this patent
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Abstract
A pumping system for evacuating an enclosure comprises a pumping mechanism (30), a motor (32) for driving the pumping mechanism, and a controller (36) for controlling the motor. The controller sets a maximum value for a rotational frequency of the motor and a maximum value for a current in the motor, and, to optimise the performance of the pumping system, independently adjusts the maximum values during evacuation of the enclosure.
Claims47
A pumping system comprising a pumping mechanism;
- a motor for driving the pumping mechanism;
- and a controller for controlling the motor, wherein the controller sets a maximum value for a rotational frequency of the motor and a maximum value for a current in the motor, and, to optimise the performance of the pumping system, adjusts said maximum values during operation of the pumping system.
A method of controlling a pumping system comprising a pumping mechanism and a motor for driving the pumping mechanism, the method comprising the steps of setting a maximum value for a rotational frequency of the motor and a maximum value for a current in the motor, and, during operation of the pumping system, adjusting said maximum values to optimise the performance of the pumping system.
Dependencies are inferred from the claim text.