Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2011-08-16
2011-08-16
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S400210, C318S641000, C318S469000, C417S053000, C417S212000
Reexamination Certificate
active
07999502
ABSTRACT:
The present invention provides a pumping system (60) comprising: a pumping mechanism (64); a motor (51) for driving the pumping mechanism; a drive control (50) for controlling the motor; and means (52) for monitoring at least one state within the system; wherein, to improve the performance of the system, the drive control causes the system to operate for transient periods in an overload condition which can result in said monitored state exceeding a predetermined operational limit, and when operating in said overload condition said drive control controls the power to the motor dependent on the level of said monitored state thereby avoiding said state from exceeding said operational limit.
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Philippe Laurent Marc
Wilder Anthony John
Edwards Limited
Paul Antony M
Ro Bentsu
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