| 摘要 |
A motorized actuator (1) for operating flaps in the radiator grille of a motor vehicle for controlling the air intake into the engine compartment. The actuator has an electric motor (2) for operating the flaps. The emergency function ensures that on interruption of the operating voltage (VB), the electric motor (2) is moved to an emergency position. For this purpose, the actuator (1) has an energy storage unit (6). During normal operation, the energy storage unit (6) is charged using a constant-current source (8). In case of failure, the electric motor (2) and its control circuit (5) are supplied from the energy storage unit (6) via a step-up converter (9).
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