Circuit arrangement for controlling the speed of rotation of a hydrostatic machine
AssigneeMannesmann Rexroth GmbH
InventorsPeter Reinhardt, Karl Hessdorfer
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Abstract
A control for the speed of rotation of a hydrostatic machine in which the controlled variable and generated in a speed controller and is made up of a proportional component and an integrating component is limited by a limiting signal which is also made up of a predetermined basic value and a ramp signal behaving proportionally to the actual pivot angle of the hydrostatic machine. The limiting signal thus limits the output signal of the speed controller so that a rapid response behaviour is obtained and fluctuations in the settling to the desired speed are reduced.
Claims9
A circuit arrangement for controlling the speed of rotation of a hydrostatic machine connected to a pressure line comprising an actuator for adjusting the hydrostatic machine for setting its speed, a speed controller coupled to said machine and to which a speed actual value and an arbitrarily settable speed desired value are supplied, said speed controller generates a control signal for driving said actuator, characterized in that the output signal of the speed controller comprises a component proportional to the input quantity and a component integrating the input quantity, means for forming a limiting signal consisting of a predetermined basic value to which is added a ramp signal proportional to a measured variable proportioned to the position of said actuator, and said limiting signal being superimposed on the output signal of the speed controller.
Dependencies are inferred from the claim text.