Vorrichtung zur stromgeregelten Steuerung mehrerer Stellglieder mittels eines Steuercomputers

摘要

A device for the current-stabilised control of a number of actuators (10-12) by means of a control computer (13) is proposed, an individual control transistor (20-22) being provided for each actuator (10-12). A single sensing resistor (27) in series with a further control transistor (28) forms a sensing and control arrangement for all actuators (10-12). Each individual control transistor (20-22) for the individual actuators (10-12) is connected in series with a resistor (17-19), the resistance value of which corresponds to that of the sensing resistor (27). Furthermore, switch-over means (14-16 and 24-26) controlled by the control computer (13) are provided by means of which the actuators (10-12) normally located in series with the associated individual control transistors (20-22) are successively connected in series with the sensing and control arrangement for a predeterminable sensing and control time, during which time a control signal sequence in each case set at the further control transistor (28) during such a sensing and control time for one of the actuators (10-12) is in each case also supplied to the associated control transistors (20-22). This provides for individual current stabilisation for a large number of actuators (10-12) by means of a single sensing resistor (27), all the control and stabilisation processes occurring in the control computer (13) and no separate analog control circuits being required.