Method and device for detecting the speed of a pump

Details Method and device for detecting the speed of a pump Method and device for detecting the speed of a pump

2006-08-01

2006-08-01

Kim, Tae Jun (Department: 3746)

Pumps

Condition responsive control of pump drive motor

In response to pump speed

C417S044200, C417S053000, C702S138000, C702S140000, C702S142000, C073S494000

Reexamination Certificate

active

07083391

ABSTRACT:
A method and a system for detecting the speed of a pump motor of a hydraulic pump system are provided, in which pump system a pump is driven by a pump motor to deliver hydraulic fluid into a pump reservoir. In accordance with the present invention, a pressure signal representing the fluid-delivery activity of the pump is detected, and the pressure peaks within this pressure signal identified. The speed of the pump motor is determined on the basis of the frequency or the time intervals of these pressure peaks.

REFERENCES:
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patent: 4965713 (1990-10-01), Hong et al.
patent: 5664937 (1997-09-01), Takahashi et al.
patent: 5678521 (1997-10-01), Thompson et al.
patent: 6276134 (2001-08-01), Matsuyama et al.
patent: 41 33 269 (1993-04-01), None

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