Spring-loaded drive with active recovery in direct current circuit

摘要

The drive has a control device (17) activating a switching device (7) for a motor (1) when energy is fed into a back-up capacitor (4) from a power supply network (5). The control device automatically sets a required deflection to an idle position when a rotor (13) of the motor is deflected from the idle position and the energy fed into the capacitor fails. The control device activates switching elements of the switching device such that the motor feeds energy into the capacitor via the switching elements of the switching device at the beginning of force restoring by a spring device (14). The motor is designed as a multiphase brushless direct-current (DC) motor. The switching elements are designed as semiconductor switching elements such as MOSFETs and insulated-gate bipolar transistors (IGBTs).