Ebm-papst Mulfingen Gmbh & Co Kg

Georg Wiedmann

Sebastian Schroth

Thomas Kilian

Ralph Wystup

Martin Bürkert

Marco Weckert

Fabian Schneider

Benedikt Stoll

An analog circuit arrangement () to variably set a voltage U, within defined voltage limits, has a non-inverting adder () with a positive input (). A voltage divider (), with at least a first stage () and a second stage (), is connected to the positive input () of the adder (). At least one stage has a parallel circuit of n resistors (R, R, . . . , Rn) that are each connected in series in a conduction path (L, L, . . . , Ln) to an overcurrent protection device (F, F, . . . , Fn). At least one device () actively changes one or more of the overcurrent protection devices (F, F, . . . , Fn) into a state that interrupts the respective affected conduction path (L, L, . . . , Ln).

Analogue voltage programming

The invention relates to a method for the closed-loop and open-loop control of two or more EC motors operated using a common converter, wherein for the purpose of setting the operating point of the EC motors, common open-loop or closed-loop control using at least one controller is provided, wherein a combination of at least two control options is provided and in this case a controlled variable regulates the voltage setting at the output of the converter such that the two or more EC motors follow an intended sequence of operating points in a stable manner.

Multi-motor operation

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Ilshofen, Germany

Georg Wiedmann