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Control circuit that has the task of adapting the rotation speed (e.g. of a hydraulic motor) as a controlled variable as accurately as possible to a setpoint. This action can be undertaken by changing

For speed measurement analogue or digital measuring procedures are used. Analogue tacho generators or rotary encoders are not particularly suitable for low rotation speeds due to their low signal leve

Provides information on the ratio of the maximum rotation speed of a hydraulic motor (hydrostatic transmission) to the minimum rotation speed: Here for n the still just "even" speed applies.

Device for angle measurement (indirect travel measurement). It receives the travel pulses generally via a spindle-nut system and converts them into the rotation of a graduated disc that is scanned pho

Valve with a rotating shaft as the control element that houses the control bores (Figure D 39) . Rotary valve are only used infrequently because their actuation is difficult to automate.

Transmission parameter. The range of the torque multiplication is given by the ratio of the maximum to the minimum torque of a hydraulic motor or hydrostatic transmission : The magnitude of the multip

Electrohydraulic torque amplifier

The most common methods use measuring shafts and . They can measure precisely, however, the measured variable must be tapped via sliding contacts or wirelessly. Conversely, with hydraulic torque measu

Torque curve of hydraulic motors: The torque curve on fixed displacement motors is only dependent on the usable pressure (pressure difference) (Figure D 38 a) , on variable displacement motors on the

Processing of digital signals (instead of analogue signals). Digital signal processing has experienced rapid growth due to the development of the microprocessor as a signal processing module. Digital