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US 6,629,020 B1Granted
Control device for the position of a valve slide
AssigneeSauer-Danfoss Holding A/S
InventorFlemming Thomsen
Life of this patent
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AssigneeSauer-Danfoss Holding A/S
InventorFlemming Thomsen
Estimating the term…
A control device for the position (x) of a valve slide (3), with a d.c. voltage (UB) operated set point transmitter (11), which produces a set point value (Uw) proportional to the position (w) of a control lever (10) and the operating d.c. voltage (UB), with an actual value transmitter (15) operated with the same d.c. voltage (UB) as the set point transmitter (11), which produces an actual value signal (Ux) proportional to the position (x) of the valve slide (3) and the operating d.c. voltage (UB), the proportionality factors (k1, k2) being equal to the dependence of the set point and actual value signals (Uw, Ux) on the position (x) of the valve slide (3) or the position (w) of the control lever (10), respectively, and on the operating d.c. voltage (UB), and with a regulating device (14) having a comparator (12), which regulating device (14) makes the position (x) of the valve slide (3) follow the position (w) of the control lever (10) in dependence of a difference between the set point signal and the actual value signal (Uw, Ux) detected by the comparator (12). To simplify the embodiment of the control device and to improve its working reliability, the actual value transmitter (15) converts the position (x) of the valve slide (3) touchfree into the actual value signal (Ux).
Control device for the position of a valve slide having a set point transmitter operated by an operating d.c. voltage, the set point transmitter producing a set point signal proportional to the position of a control lever and the operating d.c. voltage, and having an actual value transmitter operated with the same operating d.c. voltage as the set point transmitter, the actual value transmitter producing an actual value signal proportional to the position of the valve slide and the operating d.c. voltage, the actual value signal for the valve slide having a proportionality factor dependent on the position of the valve slide and on the operating d.c. voltage and the set point signal for the control lever having a proportionality factor dependent on the position of the control lever and on the operating d.c. voltage, and having a regulating device having a comparator, which regulating device makes the position of the valve slide follow the position of the control lever in dependence on a difference between the set point signal and the actual value signal detected by the comparator, and in which the actual value transmitter converts the position of the valve slide touchfree into the actual value signal.
Dependencies are inferred from the claim text.